void Texture :: buildMipmaps ()
{
glTexParameteri ( target, GL_TEXTURE_BASE_LEVEL, 0 );
glTexParameteri ( target, GL_GENERATE_MIPMAP, GL_TRUE );
glGenerateMipmap ( target ); // should be bound
}
static void se_loadTextureImage(JNIEnv* env, jobject clazz, jstring imageKey,
jobject jbitmap) {
const char* imagePath = env->GetStringUTFChars(imageKey, NULL);
SE_ResourceManager *resourceManager =
SE_Application::getInstance()->getResourceManager();
SE_ImageData* existdata = resourceManager->getImageDataFromPath(imagePath);
if (existdata && !existdata->getData()) {
GLuint texid = existdata->getTexID();
if (texid != 0) {
glDeleteTextures(1, &texid);
}
existdata->setTexID(0);
AndroidBitmapInfo bitmapInfo;
int ret;
void* pixels;
if ((ret = AndroidBitmap_getInfo(env, jbitmap, &bitmapInfo)) < 0) {
LOGE("error: AndroidBitmap_getInfo() failed ! error = %d\n", ret);
return;
}
if (bitmapInfo.format != ANDROID_BITMAP_FORMAT_RGB_565
&& bitmapInfo.format != ANDROID_BITMAP_FORMAT_RGBA_8888
&& bitmapInfo.format != ANDROID_BITMAP_FORMAT_RGBA_4444) {
LOGE("error: Bitmap format is not supported\n");
return;
}
if ((ret = AndroidBitmap_lockPixels(env, jbitmap, &pixels)) < 0) {
LOGE("error: AndroidBitmap_lockPixels() failed ! error = %d\n",
ret);
return;
}
GLint internalFormat = GL_RGB;
GLenum format = GL_RGB;
GLenum type = GL_UNSIGNED_BYTE;
switch (bitmapInfo.format) {
case ANDROID_BITMAP_FORMAT_RGB_565:
type = GL_UNSIGNED_SHORT_5_6_5;
break;
case ANDROID_BITMAP_FORMAT_RGBA_8888:
internalFormat = GL_RGBA;
format = GL_RGBA;
break;
case ANDROID_BITMAP_FORMAT_RGBA_4444:
internalFormat = GL_RGBA;
format = GL_RGBA;
type = GL_UNSIGNED_SHORT_4_4_4_4;
break;
default:
return;
break;
}
int width = bitmapInfo.width;
int height = bitmapInfo.height;
glPixelStorei(GL_UNPACK_ALIGNMENT,1);
glActiveTexture(GL_TEXTURE0);
glGenTextures(1, &texid);
existdata->setTexID(texid);
glBindTexture(GL_TEXTURE_2D, texid);
glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format,
type, pixels);
glGenerateMipmap (GL_TEXTURE_2D);
GLint wraps, wrapt;
if (SE_Util::isPower2(width) && SE_Util::isPower2(height)) {
wraps = GL_REPEAT;
} else {
wraps = GL_CLAMP_TO_EDGE;
}
if (SE_Util::isPower2(width) && SE_Util::isPower2(height)) {
wrapt = GL_REPEAT;
} else {
wrapt = GL_CLAMP_TO_EDGE;
}
GLint sampleMin, sampleMag;
sampleMin = GL_LINEAR_MIPMAP_LINEAR;
sampleMag = GL_LINEAR;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wraps);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapt);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, sampleMin);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, sampleMag);
}
env->ReleaseStringUTFChars(imageKey, imagePath);
}
static void gl2_renderchain_render(
gl_t *gl,
void *chain_data,
video_frame_info_t *video_info,
uint64_t frame_count,
const struct video_tex_info *tex_info,
const struct video_tex_info *feedback_info)
{
int i;
video_shader_ctx_coords_t coords;
video_shader_ctx_params_t params;
video_shader_ctx_info_t shader_info;
gl2_renderchain_t *chain = (gl2_renderchain_t*)chain_data;
static GLfloat fbo_tex_coords[8] = {0.0f};
struct video_tex_info fbo_tex_info[GFX_MAX_SHADERS];
struct video_tex_info *fbo_info = NULL;
const struct video_fbo_rect *prev_rect = NULL;
GLfloat xamt = 0.0f;
GLfloat yamt = 0.0f;
unsigned mip_level = 0;
unsigned fbo_tex_info_cnt = 0;
unsigned width = video_info->width;
unsigned height = video_info->height;
/* Render the rest of our passes. */
gl->coords.tex_coord = fbo_tex_coords;
/* Calculate viewports, texture coordinates etc,
* and render all passes from FBOs, to another FBO. */
for (i = 1; i < chain->fbo_pass; i++)
{
video_shader_ctx_coords_t coords;
video_shader_ctx_params_t params;
const struct video_fbo_rect *rect = &gl->fbo_rect[i];
prev_rect = &gl->fbo_rect[i - 1];
fbo_info = &fbo_tex_info[i - 1];
xamt = (GLfloat)prev_rect->img_width / prev_rect->width;
yamt = (GLfloat)prev_rect->img_height / prev_rect->height;
set_texture_coords(fbo_tex_coords, xamt, yamt);
fbo_info->tex = chain->fbo_texture[i - 1];
fbo_info->input_size[0] = prev_rect->img_width;
fbo_info->input_size[1] = prev_rect->img_height;
fbo_info->tex_size[0] = prev_rect->width;
fbo_info->tex_size[1] = prev_rect->height;
memcpy(fbo_info->coord, fbo_tex_coords, sizeof(fbo_tex_coords));
fbo_tex_info_cnt++;
gl2_bind_fb(chain->fbo[i]);
shader_info.data = gl;
shader_info.idx = i + 1;
shader_info.set_active = true;
video_shader_driver_use(&shader_info);
glBindTexture(GL_TEXTURE_2D, chain->fbo_texture[i - 1]);
mip_level = i + 1;
if (video_shader_driver_mipmap_input(&mip_level)
&& gl->have_mipmap)
glGenerateMipmap(GL_TEXTURE_2D);
glClear(GL_COLOR_BUFFER_BIT);
/* Render to FBO with certain size. */
gl_set_viewport(gl, video_info,
rect->img_width, rect->img_height, true, false);
params.data = gl;
params.width = prev_rect->img_width;
params.height = prev_rect->img_height;
params.tex_width = prev_rect->width;
params.tex_height = prev_rect->height;
params.out_width = gl->vp.width;
params.out_height = gl->vp.height;
params.frame_counter = (unsigned int)frame_count;
params.info = tex_info;
params.prev_info = gl->prev_info;
params.feedback_info = feedback_info;
params.fbo_info = fbo_tex_info;
params.fbo_info_cnt = fbo_tex_info_cnt;
video_shader_driver_set_parameters(¶ms);
gl->coords.vertices = 4;
coords.handle_data = NULL;
coords.data = &gl->coords;
video_driver_set_coords(&coords);
video_info->cb_set_mvp(gl,
video_info->shader_data, &gl->mvp);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}
#if defined(GL_FRAMEBUFFER_SRGB) && !defined(HAVE_OPENGLES)
if (chain->has_srgb_fbo)
glDisable(GL_FRAMEBUFFER_SRGB);
#endif
/* Render our last FBO texture directly to screen. */
prev_rect = &gl->fbo_rect[chain->fbo_pass - 1];
xamt = (GLfloat)prev_rect->img_width / prev_rect->width;
yamt = (GLfloat)prev_rect->img_height / prev_rect->height;
set_texture_coords(fbo_tex_coords, xamt, yamt);
/* Push final FBO to list. */
fbo_info = &fbo_tex_info[chain->fbo_pass - 1];
fbo_info->tex = chain->fbo_texture[chain->fbo_pass - 1];
fbo_info->input_size[0] = prev_rect->img_width;
fbo_info->input_size[1] = prev_rect->img_height;
fbo_info->tex_size[0] = prev_rect->width;
fbo_info->tex_size[1] = prev_rect->height;
memcpy(fbo_info->coord, fbo_tex_coords, sizeof(fbo_tex_coords));
fbo_tex_info_cnt++;
/* Render our FBO texture to back buffer. */
gl2_renderchain_bind_backbuffer(gl, chain_data);
shader_info.data = gl;
shader_info.idx = chain->fbo_pass + 1;
shader_info.set_active = true;
video_shader_driver_use(&shader_info);
glBindTexture(GL_TEXTURE_2D, chain->fbo_texture[chain->fbo_pass - 1]);
mip_level = chain->fbo_pass + 1;
if (video_shader_driver_mipmap_input(&mip_level)
&& gl->have_mipmap)
glGenerateMipmap(GL_TEXTURE_2D);
glClear(GL_COLOR_BUFFER_BIT);
gl_set_viewport(gl, video_info,
width, height, false, true);
params.data = gl;
params.width = prev_rect->img_width;
params.height = prev_rect->img_height;
params.tex_width = prev_rect->width;
params.tex_height = prev_rect->height;
params.out_width = gl->vp.width;
params.out_height = gl->vp.height;
params.frame_counter = (unsigned int)frame_count;
params.info = tex_info;
params.prev_info = gl->prev_info;
params.feedback_info = feedback_info;
params.fbo_info = fbo_tex_info;
params.fbo_info_cnt = fbo_tex_info_cnt;
video_shader_driver_set_parameters(¶ms);
gl->coords.vertex = gl->vertex_ptr;
gl->coords.vertices = 4;
coords.handle_data = NULL;
coords.data = &gl->coords;
video_driver_set_coords(&coords);
video_info->cb_set_mvp(gl,
video_info->shader_data, &gl->mvp);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
gl->coords.tex_coord = gl->tex_info.coord;
}
int main() {
// INIT
glfwSetErrorCallback( error_callback );
/* Initialize the library */
if ( !glfwInit() ) {
return -1;
}
// must use exactly version 3
glfwWindowHint( GLFW_CONTEXT_VERSION_MAJOR, 3 );
glfwWindowHint( GLFW_CONTEXT_VERSION_MINOR, 3 );
glfwWindowHint( GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE );
glfwWindowHint( GLFW_RESIZABLE, GL_FALSE );
/* Create a windowed mode window and its OpenGL context */
window = glfwCreateWindow( WIDTH, HEIGHT, "Hello World", NULL, NULL );
if ( !window ) {
glfwTerminate();
return -1;
}
glfwMakeContextCurrent( window );
glfwSetKeyCallback( window, key_callback );
//glfwSetCursorPosCallback(window, cursor_position_callback);
glfwSetScrollCallback(window, scroll_callback);
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
int count;
//printf( "%s\n", glfwGetVideoModes( glfwGetPrimaryMonitor(), &count ) );
glewExperimental = GL_TRUE;
if( glewInit() != GLEW_OK ) {
fprintf( stderr, "glewInit() failed\n" );
}
glViewport( 0, 0, WIDTH, HEIGHT );
glClearColor( 0.2f, 0.3f, 0.3f, 1.0f );
glEnable( GL_DEPTH_TEST );
// SHADER
Shader shader( "./vertexShader.glsl", "./fragmentShader.glsl" );
// Set up vertex data (and buffer(s)) and attribute pointers
GLfloat vertices[] = {
-1.0f, -1.0f, -1.0f, 1.0f, 0.0f,
-1.0f, -1.0f, 1.0f, 0.0f, 0.0f,
-1.0f, 1.0f, -1.0f, 1.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 1.0f,
1.0f, -1.0f, -1.0f, 0.0f, 0.0f,
1.0f, -1.0f, 1.0f, 1.0f, 0.0f,
1.0f, 1.0f, -1.0f, 0.0f, 1.0f,
1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
};
GLuint indices[] = {
0, 1, 2,
1, 2, 3,
1, 3, 5,
3, 5, 7,
4, 5, 7,
4, 6, 7,
0, 4, 6,
0, 2, 6,
2, 3, 7,
2, 6, 7,
0, 1, 5,
0, 4, 5
};
// vertex buffer object (VBO)
// vertex array object (VAO)
GLuint VAO, VBO, EBO;
glGenVertexArrays( 1, &VAO );
glGenBuffers( 1, &VBO );
glGenBuffers( 1, &EBO );
// BIND the Vertex Array Object first, then bind and set vertex buffer(s) and attribute pointer(s).
glBindVertexArray( VAO );
glBindBuffer( GL_ARRAY_BUFFER, VBO );
glBufferData( GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW );
glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, EBO );
glBufferData( GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW );
// void glVertexAttribPointer( GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid * pointer);
// the 0 for index comes from location = 0 in the vertex shader
glVertexAttribPointer( 0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)0 );
glVertexAttribPointer( 1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)) );
glEnableVertexAttribArray( 0 );
glEnableVertexAttribArray( 1 );
glBindVertexArray( 0 );
stbi_set_flip_vertically_on_load(1);
// TEXTURE
GLuint texture;
glGenTextures(1, &texture);
//printf( "texture: %d\n", texture );
glBindTexture(GL_TEXTURE_2D, texture); // All upcoming GL_TEXTURE_2D operations now have effect on our texture object
// Set our texture parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); // Set texture wrapping to GL_REPEAT
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// Set texture filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Load, create texture and generate mipmaps
int width, height, comp;
unsigned char* image = stbi_load("./images/container.jpg", &width, &height, &comp, 3);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
stbi_image_free(image);
glBindTexture(GL_TEXTURE_2D, 0);
GLuint texture1;
glGenTextures(1, &texture1);
//printf( "texture1: %d\n", texture1 );
glBindTexture(GL_TEXTURE_2D, texture1);
// Set our texture parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); // Set texture wrapping to GL_REPEAT
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// Set texture filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Load, create texture and generate mipmaps
image = stbi_load("./images/awesomeface.png", &width, &height, &comp, 3 );
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
stbi_image_free(image);
glBindTexture(GL_TEXTURE_2D, 0);
glm::mat4 projection;
projection = glm::perspective( 45.0f, (GLfloat)WIDTH/HEIGHT, 0.1f, 100.0f );
/*
for( int y = 0; y < 4; ++y ) {
for( int x = 0; x < 4; ++x ) {
printf( "%f ", test[x][y] );
}
printf("\n");
}
*/
// Game loop
while( !glfwWindowShouldClose( window ) ) {
//for( int iter = 1; iter; --iter ) {
glfwPollEvents();
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glActiveTexture( GL_TEXTURE0 );
glBindTexture(GL_TEXTURE_2D, texture);
glUniform1i( glGetUniformLocation(shader.Program, "texture"), 0 );
glActiveTexture( GL_TEXTURE1 );
glBindTexture(GL_TEXTURE_2D, texture1);
glUniform1i( glGetUniformLocation(shader.Program, "texture1"), 1 );
glUseProgram( shader.Program );
glm::mat4 models[2];
models[0] = glm::translate( models[0], glm::vec3( 4.0f, 4.0f, -10.0f ) );
//models[1] = glm::translate( models[1], glm::vec3( -4.0f, -4.0f, -10.0f ) );
models[1] = glm::scale( models[1], glm::vec3( 50.0f, 50.0f, 50.0f ) );
updateCamera();
//glm::mat4 rotatedView = camera[1] * camera[0] * view;
printf( "rotation x %f, y %f, z %f\n", rotation.x, rotation.y, rotation.z );
glm::mat4 rotatedView;
rotatedView = glm::rotate( rotatedView, rotation.x, glm::vec3(1, 0, 0) ) ;
rotatedView = glm::rotate( rotatedView, rotation.y, glm::vec3(0, 1, 0) ) ;
rotatedView = glm::rotate( rotatedView, rotation.z, glm::vec3(0, 0, 1) ) ;
rotatedView *= view;
//view = glm::translate( view, position );
//glm::mat4 rotatedView;
//projection = glm::rotate( projection, glm::radians(cameraOrientation[1]), glm::vec3(1.0f, 0.0f, 0.0f) );
//projection = glm::rotate( projection, glm::radians(cameraOrientation[0]), glm::vec3(0.0f, 1.0f, 0.0f) );
//projection = projection * (cameraPosition / 10.0f);
glUniformMatrix4fv( glGetUniformLocation(shader.Program, "view" ), 1, GL_FALSE, glm::value_ptr(rotatedView) );
glUniformMatrix4fv( glGetUniformLocation(shader.Program, "projection" ), 1, GL_FALSE, glm::value_ptr(projection) );
for( int numBoxes = 0; numBoxes < 3; ++numBoxes ) {
glUniformMatrix4fv( glGetUniformLocation(shader.Program, "model" ), 1, GL_FALSE, glm::value_ptr(models[numBoxes]) );
glBindVertexArray( VAO );
//glDrawArrays( GL_TRIANGLES, 0, 3 );
glDrawElements( GL_TRIANGLES, 36, GL_UNSIGNED_INT, 0 );
glBindVertexArray( 0 );
}
glfwSwapBuffers( window );
fps();
printf("\n");
}
glDeleteVertexArrays( 1, &VAO );
glDeleteBuffers( 1, &VBO );
glfwDestroyWindow( window );
glfwTerminate();
return 0;
}
// The MAIN function, from here we start the application and run the game loop
int main()
{
// Init GLFW
glfwInit( );
// Set all the required options for GLFW
glfwWindowHint( GLFW_CONTEXT_VERSION_MAJOR, 3 );
glfwWindowHint( GLFW_CONTEXT_VERSION_MINOR, 3 );
glfwWindowHint( GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE );
glfwWindowHint( GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE );
glfwWindowHint( GLFW_RESIZABLE, GL_FALSE );
// Create a GLFWwindow object that we can use for GLFW's functions
GLFWwindow *window = glfwCreateWindow( WIDTH, HEIGHT, "LearnOpenGL", nullptr, nullptr );
int screenWidth, screenHeight;
glfwGetFramebufferSize( window, &screenWidth, &screenHeight );
if ( nullptr == window )
{
std::cout << "Failed to create GLFW window" << std::endl;
glfwTerminate( );
return EXIT_FAILURE;
}
glfwMakeContextCurrent( window );
// Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
glewExperimental = GL_TRUE;
// Initialize GLEW to setup the OpenGL Function pointers
if ( GLEW_OK != glewInit( ) )
{
std::cout << "Failed to initialize GLEW" << std::endl;
return EXIT_FAILURE;
}
// Define the viewport dimensions
glViewport( 0, 0, screenWidth, screenHeight );
// Setup OpenGL options
glEnable( GL_DEPTH_TEST );
// enable alpha support
glEnable( GL_BLEND );
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
// Build and compile our shader program
Shader ourShader( "res/shaders/core.vs", "res/shaders/core.frag" );
// Set up vertex data (and buffer(s)) and attribute pointers
// use with Orthographic Projection
/*
GLfloat vertices[] = {
-0.5f * 500, -0.5f * 500, -0.5f * 500, 0.0f, 0.0f,
0.5f * 500, -0.5f * 500, -0.5f * 500, 1.0f, 0.0f,
0.5f * 500, 0.5f * 500, -0.5f * 500, 1.0f, 1.0f,
0.5f * 500, 0.5f * 500, -0.5f * 500, 1.0f, 1.0f,
-0.5f * 500, 0.5f * 500, -0.5f * 500, 0.0f, 1.0f,
-0.5f * 500, -0.5f * 500, -0.5f * 500, 0.0f, 0.0f,
-0.5f * 500, -0.5f * 500, 0.5f * 500, 0.0f, 0.0f,
0.5f * 500, -0.5f * 500, 0.5f * 500, 1.0f, 0.0f,
0.5f * 500, 0.5f * 500, 0.5f * 500, 1.0f, 1.0f,
0.5f * 500, 0.5f * 500, 0.5f * 500, 1.0f, 1.0f,
-0.5f * 500, 0.5f * 500, 0.5f * 500, 0.0f, 1.0f,
-0.5f * 500, -0.5f * 500, 0.5f * 500, 0.0f, 0.0f,
-0.5f * 500, 0.5f * 500, 0.5f * 500, 1.0f, 0.0f,
-0.5f * 500, 0.5f * 500, -0.5f * 500, 1.0f, 1.0f,
-0.5f * 500, -0.5f * 500, -0.5f * 500, 0.0f, 1.0f,
-0.5f * 500, -0.5f * 500, -0.5f * 500, 0.0f, 1.0f,
-0.5f * 500, -0.5f * 500, 0.5f * 500, 0.0f, 0.0f,
-0.5f * 500, 0.5f * 500, 0.5f * 500, 1.0f, 0.0f,
0.5f * 500, 0.5f * 500, 0.5f * 500, 1.0f, 0.0f,
0.5f * 500, 0.5f * 500, -0.5f * 500, 1.0f, 1.0f,
0.5f * 500, -0.5f * 500, -0.5f * 500, 0.0f, 1.0f,
0.5f * 500, -0.5f * 500, -0.5f * 500, 0.0f, 1.0f,
0.5f * 500, -0.5f * 500, 0.5f * 500, 0.0f, 0.0f,
0.5f * 500, 0.5f * 500, 0.5f * 500, 1.0f, 0.0f,
-0.5f * 500, -0.5f * 500, -0.5f * 500, 0.0f, 1.0f,
0.5f * 500, -0.5f * 500, -0.5f * 500, 1.0f, 1.0f,
0.5f * 500, -0.5f * 500, 0.5f * 500, 1.0f, 0.0f,
0.5f * 500, -0.5f * 500, 0.5f * 500, 1.0f, 0.0f,
-0.5f * 500, -0.5f * 500, 0.5f * 500, 0.0f, 0.0f,
-0.5f * 500, -0.5f * 500, -0.5f * 500, 0.0f, 1.0f,
-0.5f * 500, 0.5f * 500, -0.5f * 500, 0.0f, 1.0f,
0.5f * 500, 0.5f * 500, -0.5f * 500, 1.0f, 1.0f,
0.5f * 500, 0.5f * 500, 0.5f * 500, 1.0f, 0.0f,
0.5f * 500, 0.5f * 500, 0.5f * 500, 1.0f, 0.0f,
-0.5f * 500, 0.5f * 500, 0.5f * 500, 0.0f, 0.0f,
-0.5f * 500, 0.5f * 500, -0.5f * 500, 0.0f, 1.0f
};
*/
// use with Perspective Projection
GLfloat vertices[] = {
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, 1.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f
};
GLuint VBO, VAO;
glGenVertexArrays( 1, &VAO );
glGenBuffers( 1, &VBO );
glBindVertexArray(VAO);
glBindBuffer( GL_ARRAY_BUFFER, VBO );
glBufferData( GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW );
// Position attribute
glVertexAttribPointer( 0, 3, GL_FLOAT , GL_FALSE, 5 * sizeof( GLfloat ), ( GLvoid * )0 );
glEnableVertexAttribArray( 0 );
// TexCoord attribute
glVertexAttribPointer( 2, 2, GL_FLOAT, GL_FALSE, 5 * sizeof( GLfloat ), ( GLvoid * )( 3 * sizeof( GLfloat ) ) );
glEnableVertexAttribArray( 2 );
glBindVertexArray( 0 ); // Unbind VAO
// Load and create a texture
GLuint texture;
// ====================
// Texture
// ====================
glGenTextures( 1, &texture );
glBindTexture( GL_TEXTURE_2D, texture ); // All upcoming GL_TEXTURE_2D operations now have effect on our texture object
// Set our texture parameters
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT ); // Set texture wrapping to GL_REPEAT
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
// Set texture filtering
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
// Load, create texture and generate mipmaps
int width, height;
unsigned char *image = SOIL_load_image( "res/images/image1.jpg", &width, &height, 0, SOIL_LOAD_RGBA );
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, image );
glGenerateMipmap( GL_TEXTURE_2D );
SOIL_free_image_data( image );
glBindTexture( GL_TEXTURE_2D, 0 ); // Unbind texture when done, so we won't accidentily mess up our texture.
glm::mat4 projection;
projection = glm::perspective( 45.0f, ( GLfloat )screenWidth / ( GLfloat )screenHeight, 0.1f, 100.0f );
//projection = glm::ortho(0.0f, ( GLfloat )screenWidth, 0.0f, ( GLfloat )screenHeight, 0.1f, 1000.0f);
// Game loop
while ( !glfwWindowShouldClose( window ) )
{
// Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
glfwPollEvents( );
// Render
// Clear the colorbuffer
glClearColor( 0.2f, 0.3f, 0.3f, 1.0f );
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
// Bind Textures using texture units
glActiveTexture( GL_TEXTURE0 );
glBindTexture( GL_TEXTURE_2D, texture );
glUniform1i(glGetUniformLocation( ourShader.Program, "ourTexture1" ), 0 );
// Activate shader
ourShader.Use( );
// Create transformations
glm::mat4 model;
glm::mat4 view;
model = glm::rotate( model, ( GLfloat)glfwGetTime( ) * 1.0f, glm::vec3( 0.5f, 1.0f, 0.0f ) ); // use with perspective projection
//model = glm::rotate( model, 0.5f, glm::vec3( 1.0f, 0.0f, 0.0f ) ); // use to compare orthographic and perspective projection
//view = glm::translate( view, glm::vec3( screenWidth / 2, screenHeight / 2, -700.0f ) ); // use with orthographic projection
view = glm::translate( view, glm::vec3( 0.0f, 0.0f, -3.0f ) ); // use with perspective projection
// Get their uniform location
GLint modelLoc = glGetUniformLocation( ourShader.Program, "model" );
GLint viewLoc = glGetUniformLocation( ourShader.Program, "view" );
GLint projLoc = glGetUniformLocation( ourShader.Program, "projection" );
// Pass them to the shaders
glUniformMatrix4fv( modelLoc, 1, GL_FALSE, glm::value_ptr( model ) );
glUniformMatrix4fv( viewLoc, 1, GL_FALSE, glm::value_ptr( view ) );
glUniformMatrix4fv( projLoc, 1, GL_FALSE, glm::value_ptr( projection ) );
// Draw container
glBindVertexArray( VAO );
glDrawArrays( GL_TRIANGLES, 0, 36 );
glBindVertexArray( 0 );
// Swap the screen buffers
glfwSwapBuffers( window );
}
// Properly de-allocate all resources once they've outlived their purpose
glDeleteVertexArrays( 1, &VAO );
glDeleteBuffers( 1, &VBO );
// Terminate GLFW, clearing any resources allocated by GLFW.
glfwTerminate( );
return EXIT_SUCCESS;
}
bool LoadImg( const char *img_path_file, GLuint &image ){
ILenum error;
GLenum error_gl;
ILboolean success;
ILuint imgage_id;
/*
Tworzy identyfikator dla wczytywanej grafiki.
*/
ilGenImages( 1, &imgage_id );
/*
Przygotowywuje dla wczytywania grafiki.
*/
ilBindImage( imgage_id );
/*
Załadowanie pliku grafiki o nazwie img_path_file do pamięci.
*/
success = ilLoadImage( img_path_file );
/*
Sprawdzenie3 czy jest błąd.
*/
if( ! success ){
/*
Otrzymanie numeru błędu.
*/
error = ilGetError();
/*
Sprawdzenie czy ten kod jest błędem.
*/
if( error != IL_NO_ERROR ){
/*
Wyświetl bład.
*/
cout<<"ilLoadImage ("<<img_path_file<<"): "<<iluErrorString( error )<<"\n";
image = 0;
/*
Usuń z pamięci.
*/
ilDeleteImages( 1, &imgage_id );
return false;
}
/*
Gdyby były błedy z wczytanie a kod błedu na to nie wskazywał.
*/
cout<<"ilLoadImage ("<<img_path_file<<"): "<<ilGetError()<<"\n";
image = 0;
/*
Usuń z pamięci.
*/
ilDeleteImages( 1, &imgage_id );
return false;
}
/*
Szerokość obrazka
*/
GLint width = ilGetInteger( IL_IMAGE_WIDTH );
/*
Wysokość obrazka
*/
GLint height = ilGetInteger( IL_IMAGE_HEIGHT );
/*
Typ obrazka (np. RGB lub RGBA).
*/
GLint type = ilGetInteger( IL_IMAGE_TYPE );
/*
Specyfikacja pikseli (jak są reprezentowane, np. unsigned int).
*/
GLint format = ilGetInteger( IL_IMAGE_FORMAT );
/*
Tworzy identyfikator tekstury
*/
glGenTextures( 1, &image );
/*
Do wcześniej stworzonego identyfikatora stwórz teksturę 2D
*/
glBindTexture( GL_TEXTURE_2D, image );
/*
Kopiuje grafikę z DevIL do OpenGL.
ilGetData() - przekazanie całego obrazka (danych), który jest aktualnie przetwarzany.
*/
glTexImage2D( GL_TEXTURE_2D, 0, format, width, height, 0, format, type, ilGetData() );
/*
Sprawdzenie czy nie ma błedu.
*/
error_gl = glGetError();
if( error_gl != GL_NO_ERROR and error_gl != GL_INVALID_ENUM ){
cout<<"glTexImage2D ("<<img_path_file<<"): "<<gluErrorString( error_gl )<<"\n";
return false;
}
/*
Tworzenie automatycznej Mipmapy, im dalej tym gorsza tekstura.
*/
glGenerateMipmap( GL_TEXTURE_2D );
/*
Typ powtarzania obrazka, gdy się skończy dana tekstura.
*/
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
/*
Jak ma być skalowana tekstura. Typ skalowania.
*/
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
/*
Czyszczenie.
*/
glBindTexture(GL_TEXTURE_2D, 0);
/*
Usunięcie z pamięci obrazka w DevIL.
*/
ilDeleteImages( 1, &imgage_id );
return true;
}
// The MAIN function, from here we start the application and run the game loop
int main()
{
// Init GLFW
glfwInit();
// Set all the required options for GLFW
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
// Create a GLFWwindow object that we can use for GLFW's functions
GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, "LearnOpenGL", nullptr, nullptr);
glfwMakeContextCurrent(window);
// Set the required callback functions
glfwSetKeyCallback(window, key_callback);
glfwSetCursorPosCallback(window, mouse_callback);
glfwSetScrollCallback(window, scroll_callback);
// GLFW Options
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
// Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
glewExperimental = GL_TRUE;
// Initialize GLEW to setup the OpenGL Function pointers
glewInit();
// Define the viewport dimensions
glViewport(0, 0, WIDTH, HEIGHT);
// OpenGL options
glEnable(GL_DEPTH_TEST);
// Build and compile our shader program
Shader lightingShader("light_casters.vs", "light_casters.frag");
Shader lampShader("lamp.vs", "lamp.frag");
// Set up vertex data (and buffer(s)) and attribute pointers
GLfloat vertices[] = {
// Positions // Normals // Texture Coords
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-0.5f, 0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 1.0f,
-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 1.0f,
0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f
};
// Positions all containers
glm::vec3 cubePositions[] = {
glm::vec3( 0.0f, 0.0f, 0.0f),
glm::vec3( 2.0f, 5.0f, -15.0f),
glm::vec3(-1.5f, -2.2f, -2.5f),
glm::vec3(-3.8f, -2.0f, -12.3f),
glm::vec3( 2.4f, -0.4f, -3.5f),
glm::vec3(-1.7f, 3.0f, -7.5f),
glm::vec3( 1.3f, -2.0f, -2.5f),
glm::vec3( 1.5f, 2.0f, -2.5f),
glm::vec3( 1.5f, 0.2f, -1.5f),
glm::vec3(-1.3f, 1.0f, -1.5f)
};
// First, set the container's VAO (and VBO)
GLuint VBO, containerVAO;
glGenVertexArrays(1, &containerVAO);
glGenBuffers(1, &VBO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glBindVertexArray(containerVAO);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(1);
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(6 * sizeof(GLfloat)));
glEnableVertexAttribArray(2);
glBindVertexArray(0);
// Then, we set the light's VAO (VBO stays the same. After all, the vertices are the same for the light object (also a 3D cube))
GLuint lightVAO;
glGenVertexArrays(1, &lightVAO);
glBindVertexArray(lightVAO);
// We only need to bind to the VBO (to link it with glVertexAttribPointer), no need to fill it; the VBO's data already contains all we need.
glBindBuffer(GL_ARRAY_BUFFER, VBO);
// Set the vertex attributes (only position data for the lamp))
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)0); // Note that we skip over the other data in our buffer object (we don't need the normals/textures, only positions).
glEnableVertexAttribArray(0);
glBindVertexArray(0);
// Load textures
GLuint diffuseMap, specularMap, emissionMap;
glGenTextures(1, &diffuseMap);
glGenTextures(1, &specularMap);
glGenTextures(1, &emissionMap);
int width, height;
unsigned char* image;
// Diffuse map
image = SOIL_load_image(FileSystem::getPath("resources/textures/container2.png").c_str(), &width, &height, 0, SOIL_LOAD_RGB);
glBindTexture(GL_TEXTURE_2D, diffuseMap);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
SOIL_free_image_data(image);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST_MIPMAP_NEAREST);
// Specular map
image = SOIL_load_image(FileSystem::getPath("resources/textures/container2_specular.png").c_str(), &width, &height, 0, SOIL_LOAD_RGB);
glBindTexture(GL_TEXTURE_2D, specularMap);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
SOIL_free_image_data(image);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST_MIPMAP_NEAREST);
glBindTexture(GL_TEXTURE_2D, 0);
// Set texture units
lightingShader.Use();
glUniform1i(glGetUniformLocation(lightingShader.Program, "material.diffuse"), 0);
glUniform1i(glGetUniformLocation(lightingShader.Program, "material.specular"), 1);
// Game loop
while (!glfwWindowShouldClose(window))
{
// Calculate deltatime of current frame
GLfloat currentFrame = glfwGetTime();
deltaTime = currentFrame - lastFrame;
lastFrame = currentFrame;
// Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
glfwPollEvents();
do_movement();
// Clear the colorbuffer
glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Use cooresponding shader when setting uniforms/drawing objects
lightingShader.Use();
GLint lightPosLoc = glGetUniformLocation(lightingShader.Program, "light.position");
GLint lightSpotdirLoc = glGetUniformLocation(lightingShader.Program, "light.direction");
GLint lightSpotCutOffLoc = glGetUniformLocation(lightingShader.Program, "light.cutOff");
GLint lightSpotOuterCutOffLoc = glGetUniformLocation(lightingShader.Program, "light.outerCutOff");
GLint viewPosLoc = glGetUniformLocation(lightingShader.Program, "viewPos");
glUniform3f(lightPosLoc, camera.Position.x, camera.Position.y, camera.Position.z);
glUniform3f(lightSpotdirLoc, camera.Front.x, camera.Front.y, camera.Front.z);
glUniform1f(lightSpotCutOffLoc, glm::cos(glm::radians(12.5f)));
glUniform1f(lightSpotOuterCutOffLoc, glm::cos(glm::radians(17.5f)));
glUniform3f(viewPosLoc, camera.Position.x, camera.Position.y, camera.Position.z);
// Set lights properties
glUniform3f(glGetUniformLocation(lightingShader.Program, "light.ambient"), 0.1f, 0.1f, 0.1f);
// We set the diffuse intensity a bit higher; note that the right lighting conditions differ with each lighting method and environment.
// Each environment and lighting type requires some tweaking of these variables to get the best out of your environment.
glUniform3f(glGetUniformLocation(lightingShader.Program, "light.diffuse"), 0.8f, 0.8f, 0.8f);
glUniform3f(glGetUniformLocation(lightingShader.Program, "light.specular"), 1.0f, 1.0f, 1.0f);
glUniform1f(glGetUniformLocation(lightingShader.Program, "light.constant"), 1.0f);
glUniform1f(glGetUniformLocation(lightingShader.Program, "light.linear"), 0.09);
glUniform1f(glGetUniformLocation(lightingShader.Program, "light.quadratic"), 0.032);
// Set material properties
glUniform1f(glGetUniformLocation(lightingShader.Program, "material.shininess"), 32.0f);
// Create camera transformations
glm::mat4 view;
view = camera.GetViewMatrix();
glm::mat4 projection = glm::perspective(camera.Zoom, (GLfloat)WIDTH / (GLfloat)HEIGHT, 0.1f, 100.0f);
// Get the uniform locations
GLint modelLoc = glGetUniformLocation(lightingShader.Program, "model");
GLint viewLoc = glGetUniformLocation(lightingShader.Program, "view");
GLint projLoc = glGetUniformLocation(lightingShader.Program, "projection");
// Pass the matrices to the shader
glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(view));
glUniformMatrix4fv(projLoc, 1, GL_FALSE, glm::value_ptr(projection));
// Bind diffuse map
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, diffuseMap);
// Bind specular map
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, specularMap);
// Draw the container (using container's vertex attributes)
/*glBindVertexArray(containerVAO);
glm::mat4 model;
glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
glDrawArrays(GL_TRIANGLES, 0, 36);
glBindVertexArray(0);*/
// Draw 10 containers with the same VAO and VBO information; only their world space coordinates differ
glm::mat4 model;
glBindVertexArray(containerVAO);
for (GLuint i = 0; i < 10; i++)
{
model = glm::mat4();
model = glm::translate(model, cubePositions[i]);
GLfloat angle = 20.0f * i;
model = glm::rotate(model, angle, glm::vec3(1.0f, 0.3f, 0.5f));
glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
glDrawArrays(GL_TRIANGLES, 0, 36);
}
glBindVertexArray(0);
// Again, no need to draw the lamp object
// Also draw the lamp object, again binding the appropriate shader
//lampShader.Use();
//// Get location objects for the matrices on the lamp shader (these could be different on a different shader)
//modelLoc = glGetUniformLocation(lampShader.Program, "model");
//viewLoc = glGetUniformLocation(lampShader.Program, "view");
//projLoc = glGetUniformLocation(lampShader.Program, "projection");
//// Set matrices
//glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(view));
//glUniformMatrix4fv(projLoc, 1, GL_FALSE, glm::value_ptr(projection));
//model = glm::mat4();
//model = glm::translate(model, lightPos);
//model = glm::scale(model, glm::vec3(0.2f)); // Make it a smaller cube
//glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
//// Draw the light object (using light's vertex attributes)
//glBindVertexArray(lightVAO);
//glDrawArrays(GL_TRIANGLES, 0, 36);
//glBindVertexArray(0);
// Swap the screen buffers
glfwSwapBuffers(window);
}
// Terminate GLFW, clearing any resources allocated by GLFW.
glfwTerminate();
return 0;
}
void QGLFramebufferObjectPrivate::init(QGLFramebufferObject *q, const QSize &sz,
QGLFramebufferObject::Attachment attachment,
GLenum texture_target, GLenum internal_format,
GLint samples, bool mipmap)
{
QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext());
fbo_guard.setContext(ctx);
bool ext_detected = (QGLExtensions::glExtensions() & QGLExtensions::FramebufferObject);
if (!ext_detected || (ext_detected && !qt_resolve_framebufferobject_extensions(ctx)))
return;
size = sz;
target = texture_target;
// texture dimensions
QT_RESET_GLERROR(); // reset error state
GLuint fbo = 0;
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER_EXT, fbo);
fbo_guard.setId(fbo);
glDevice.setFBO(q, attachment);
QT_CHECK_GLERROR();
// init texture
if (samples == 0) {
glGenTextures(1, &texture);
glBindTexture(target, texture);
glTexImage2D(target, 0, internal_format, size.width(), size.height(), 0,
GL_RGBA, GL_UNSIGNED_BYTE, NULL);
if (mipmap)
glGenerateMipmap(GL_TEXTURE_2D);
#ifndef QT_OPENGL_ES
glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
#else
glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameterf(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
#endif
glFramebufferTexture2D(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
target, texture, 0);
QT_CHECK_GLERROR();
valid = checkFramebufferStatus();
glBindTexture(target, 0);
color_buffer = 0;
} else {
mipmap = false;
GLint maxSamples;
glGetIntegerv(GL_MAX_SAMPLES_EXT, &maxSamples);
samples = qBound(0, int(samples), int(maxSamples));
glGenRenderbuffers(1, &color_buffer);
glBindRenderbuffer(GL_RENDERBUFFER_EXT, color_buffer);
if (glRenderbufferStorageMultisampleEXT && samples > 0) {
glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, samples,
internal_format, size.width(), size.height());
} else {
samples = 0;
glRenderbufferStorage(GL_RENDERBUFFER_EXT, internal_format,
size.width(), size.height());
}
glFramebufferRenderbuffer(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_RENDERBUFFER_EXT, color_buffer);
QT_CHECK_GLERROR();
valid = checkFramebufferStatus();
if (valid)
glGetRenderbufferParameteriv(GL_RENDERBUFFER_EXT, GL_RENDERBUFFER_SAMPLES_EXT, &samples);
}
// In practice, a combined depth-stencil buffer is supported by all desktop platforms, while a
// separate stencil buffer is not. On embedded devices however, a combined depth-stencil buffer
// might not be supported while separate buffers are, according to QTBUG-12861.
if (attachment == QGLFramebufferObject::CombinedDepthStencil
&& (QGLExtensions::glExtensions() & QGLExtensions::PackedDepthStencil)) {
// depth and stencil buffer needs another extension
glGenRenderbuffers(1, &depth_buffer);
Q_ASSERT(!glIsRenderbuffer(depth_buffer));
glBindRenderbuffer(GL_RENDERBUFFER_EXT, depth_buffer);
Q_ASSERT(glIsRenderbuffer(depth_buffer));
if (samples != 0 && glRenderbufferStorageMultisampleEXT)
glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, samples,
GL_DEPTH24_STENCIL8_EXT, size.width(), size.height());
else
glRenderbufferStorage(GL_RENDERBUFFER_EXT,
GL_DEPTH24_STENCIL8_EXT, size.width(), size.height());
stencil_buffer = depth_buffer;
glFramebufferRenderbuffer(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, depth_buffer);
glFramebufferRenderbuffer(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, stencil_buffer);
valid = checkFramebufferStatus();
if (!valid) {
glDeleteRenderbuffers(1, &depth_buffer);
stencil_buffer = depth_buffer = 0;
}
}
if (depth_buffer == 0 && (attachment == QGLFramebufferObject::CombinedDepthStencil
|| (attachment == QGLFramebufferObject::Depth)))
{
glGenRenderbuffers(1, &depth_buffer);
Q_ASSERT(!glIsRenderbuffer(depth_buffer));
glBindRenderbuffer(GL_RENDERBUFFER_EXT, depth_buffer);
Q_ASSERT(glIsRenderbuffer(depth_buffer));
if (samples != 0 && glRenderbufferStorageMultisampleEXT) {
#ifdef QT_OPENGL_ES
if (QGLExtensions::glExtensions() & QGLExtensions::Depth24) {
glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, samples,
GL_DEPTH_COMPONENT24_OES, size.width(), size.height());
} else {
glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, samples,
GL_DEPTH_COMPONENT16, size.width(), size.height());
}
#else
glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, samples,
GL_DEPTH_COMPONENT, size.width(), size.height());
#endif
} else {
#ifdef QT_OPENGL_ES
if (QGLExtensions::glExtensions() & QGLExtensions::Depth24) {
glRenderbufferStorage(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24_OES,
size.width(), size.height());
} else {
glRenderbufferStorage(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT16,
size.width(), size.height());
}
#else
glRenderbufferStorage(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, size.width(), size.height());
#endif
}
glFramebufferRenderbuffer(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, depth_buffer);
valid = checkFramebufferStatus();
if (!valid) {
glDeleteRenderbuffers(1, &depth_buffer);
depth_buffer = 0;
}
}
if (stencil_buffer == 0 && (attachment == QGLFramebufferObject::CombinedDepthStencil)) {
glGenRenderbuffers(1, &stencil_buffer);
Q_ASSERT(!glIsRenderbuffer(stencil_buffer));
glBindRenderbuffer(GL_RENDERBUFFER_EXT, stencil_buffer);
Q_ASSERT(glIsRenderbuffer(stencil_buffer));
if (samples != 0 && glRenderbufferStorageMultisampleEXT) {
#ifdef QT_OPENGL_ES
glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, samples,
GL_STENCIL_INDEX8_EXT, size.width(), size.height());
#else
glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, samples,
GL_STENCIL_INDEX, size.width(), size.height());
#endif
} else {
#ifdef QT_OPENGL_ES
glRenderbufferStorage(GL_RENDERBUFFER_EXT, GL_STENCIL_INDEX8_EXT,
size.width(), size.height());
#else
glRenderbufferStorage(GL_RENDERBUFFER_EXT, GL_STENCIL_INDEX,
size.width(), size.height());
#endif
}
glFramebufferRenderbuffer(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, stencil_buffer);
valid = checkFramebufferStatus();
if (!valid) {
glDeleteRenderbuffers(1, &stencil_buffer);
stencil_buffer = 0;
}
}
// The FBO might have become valid after removing the depth or stencil buffer.
valid = checkFramebufferStatus();
if (depth_buffer && stencil_buffer) {
fbo_attachment = QGLFramebufferObject::CombinedDepthStencil;
} else if (depth_buffer) {
fbo_attachment = QGLFramebufferObject::Depth;
} else {
fbo_attachment = QGLFramebufferObject::NoAttachment;
}
glBindFramebuffer(GL_FRAMEBUFFER_EXT, ctx->d_ptr->current_fbo);
if (!valid) {
if (color_buffer)
glDeleteRenderbuffers(1, &color_buffer);
else
glDeleteTextures(1, &texture);
if (depth_buffer)
glDeleteRenderbuffers(1, &depth_buffer);
if (stencil_buffer && depth_buffer != stencil_buffer)
glDeleteRenderbuffers(1, &stencil_buffer);
glDeleteFramebuffers(1, &fbo);
fbo_guard.setId(0);
}
QT_CHECK_GLERROR();
format.setTextureTarget(target);
format.setSamples(int(samples));
format.setAttachment(fbo_attachment);
format.setInternalTextureFormat(internal_format);
format.setMipmap(mipmap);
}
// to do: remove example image
GLuint MyTexture::LoadBMP(const char * file_path)
{
// Data read from the header of a BMP file
unsigned char header[54];
unsigned int dataPos;
unsigned int imageSize;
unsigned int width;
unsigned int height;
// RGB data
unsigned char * image_data;
FILE * file = fopen(file_path, "rb");
if (!file)
{
std::cout << "cannot open file " << file_path << "\n";
return 0;
}
// The header should be 54 bytes
if (fread(header, 1, 54, file) != 54) { std::cout << "Wrong BMP\n"; return 0; }
// A BMP files always begins with "BM"
if (header[0] != 'B' || header[1] != 'M') { std::cout << "Wrong BMP\n"; return 0; }
// Make sure this is a 24bpp file
if (*(int*)&(header[0x1E]) != 0) { std::cout << "Wrong BMP\n"; return 0; }
if (*(int*)&(header[0x1C]) != 24) { std::cout << "Wrong BMP\n"; return 0; }
// Read the information about the image
dataPos = *(int*)&(header[0x0A]);
imageSize = *(int*)&(header[0x22]);
width = *(int*)&(header[0x12]);
height = *(int*)&(header[0x16]);
// Some BMP files are misformatted, guess missing information
if (imageSize == 0) { imageSize = width*height * 3; } // 3 : one byte for each Red, Green and Blue component
if (dataPos == 0) { dataPos = 54; } // The BMP header is done that way
image_data = new unsigned char[imageSize]; // Create a buffer
fread(image_data, 1, imageSize, file); // Read and put to the buffer
fclose(file); // Close the image
// Create a OpenGL texture
GLuint textureID;
glGenTextures(1, &textureID);
glBindTexture(GL_TEXTURE_2D, textureID);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_BGR, GL_UNSIGNED_BYTE, image_data);
delete[] image_data;
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
// nice trilinear filtering.
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glGenerateMipmap(GL_TEXTURE_2D);
std::cout << "Image " << file_path << " is loaded\n";
return textureID;
}
void RaycastingProcessor::updateResult(DataContainer& data) {
ImageRepresentationGL::ScopedRepresentation img(data, p_sourceImageID.getValue());
ScopedTypedData<RenderData> entryPoints(data, p_entryImageID.getValue());
ScopedTypedData<RenderData> exitPoints(data, p_exitImageID.getValue());
ScopedTypedData<CameraData> camera(data, p_camera.getValue());
if (img != nullptr && entryPoints != nullptr && exitPoints != nullptr && camera != nullptr) {
if (img->getDimensionality() == 3) {
// little hack to support LOD texture lookup for the gradients:
// if texture does not yet have mipmaps, create them.
const cgt::Texture* tex = img->getTexture();
if (tex->getFilter() != cgt::Texture::MIPMAP) {
const_cast<cgt::Texture*>(tex)->setFilter(cgt::Texture::MIPMAP);
glGenerateMipmap(GL_TEXTURE_3D);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
LGL_ERROR;
}
_shader->activate();
_shader->setIgnoreUniformLocationError(true);
// Compute min/max depth if needed by shader
if (_shader->getUniformLocation("_minDepth") != -1) {
_shader->deactivate();
float minDepth = _minReduction->reduce(entryPoints->getDepthTexture()).front();
_shader->activate();
_shader->setUniform("_minDepth", minDepth);
}
if (_shader->getUniformLocation("_maxDepth") != -1) {
_shader->deactivate();
float maxDepth = _maxReduction->reduce(exitPoints->getDepthTexture()).front();
_shader->activate();
_shader->setUniform("_maxDepth", maxDepth);
}
decorateRenderProlog(data, _shader);
_shader->setUniform("_viewportSizeRCP", 1.f / cgt::vec2(getEffectiveViewportSize()));
_shader->setUniform("_jitterStepSizeMultiplier", p_jitterStepSizeMultiplier.getValue());
// compute sampling step size relative to volume size
float samplingStepSize = 1.f / (p_samplingRate.getValue() * cgt::max(img->getSize()));
_shader->setUniform("_samplingStepSize", samplingStepSize);
// compute and set camera parameters
const cgt::Camera& cam = camera->getCamera();
float n = cam.getNearDist();
float f = cam.getFarDist();
_shader->setUniform("_cameraPosition", cam.getPosition());
_shader->setUniform("const_to_z_e_1", 0.5f + 0.5f*((f+n)/(f-n)));
_shader->setUniform("const_to_z_e_2", ((f-n)/(f*n)));
_shader->setUniform("const_to_z_w_1", ((f*n)/(f-n)));
_shader->setUniform("const_to_z_w_2", 0.5f*((f+n)/(f-n))+0.5f);
_shader->setIgnoreUniformLocationError(false);
// bind input textures
cgt::TextureUnit volumeUnit, entryUnit, exitUnit, tfUnit;
img->bind(_shader, volumeUnit, "_volume", "_volumeTextureParams");
p_transferFunction.getTF()->bind(_shader, tfUnit);
if (! _bindEntryExitDepthTextures) {
entryPoints->bindColorTexture(_shader, entryUnit, "_entryPoints", "_entryParams");
exitPoints->bindColorTexture(_shader, exitUnit, "_exitPoints", "_exitParams");
processImpl(data, img);
}
else {
cgt::TextureUnit entryUnitDepth, exitUnitDepth;
entryPoints->bind(_shader, entryUnit, entryUnitDepth, "_entryPoints", "_entryPointsDepth", "_entryParams");
exitPoints->bind(_shader, exitUnit, exitUnitDepth, "_exitPoints", "_exitPointsDepth", "_exitParams");
processImpl(data, img);
}
decorateRenderEpilog(_shader);
_shader->deactivate();
cgt::TextureUnit::setZeroUnit();
LGL_ERROR;
}
else {
LERROR("Input image must have dimensionality of 3.");
}
}
else {
LDEBUG("No suitable input image found.");
}
}
/**
* Method is used to build texture mipmapis for mipmapping technique.
* @param target is texture type.
*/
void FrameBufferObject::buildMipmaps(GLenum target) const
{
glBindTexture(target, getColorBuffer());
glGenerateMipmap(target);
}
void displayCB()
{
// get the total elapsed time
playTime = (float)timer.getElapsedTime();
// compute rotation angle
const float ANGLE_SPEED = 10; // degree/s
float angle = ANGLE_SPEED * playTime;
// render to texture //////////////////////////////////////////////////////
t1.start();
// adjust viewport and projection matrix to texture dimension
glViewport(0, 0, TEXTURE_WIDTH, TEXTURE_HEIGHT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60.0f, (float)(TEXTURE_WIDTH)/TEXTURE_HEIGHT, 1.0f, 100.0f);
glMatrixMode(GL_MODELVIEW);
// camera transform
glLoadIdentity();
glTranslatef(0, 0, -CAMERA_DISTANCE);
// with MSAA
// render to MSAA FBO
if(msaaUsed)
{
// set the rendering destination to FBO
glBindFramebuffer(GL_FRAMEBUFFER, fboMsaaId);
// clear buffer
glClearColor(1, 1, 1, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// draw a rotating object at the origin
glPushMatrix();
glRotatef(angle*0.5f, 1, 0, 0);
glRotatef(angle, 0, 1, 0);
glRotatef(angle*0.7f, 0, 0, 1);
glTranslatef(0, -1.575f, 0);
drawTeapot();
glPopMatrix();
// copy rendered image from MSAA (multi-sample) to normal (single-sample) FBO
// NOTE: The multi samples at a pixel in read buffer will be converted
// to a single sample at the target pixel in draw buffer.
glBindFramebuffer(GL_READ_FRAMEBUFFER, fboMsaaId);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fboId);
glBlitFramebuffer(0, 0, TEXTURE_WIDTH, TEXTURE_HEIGHT, // src rect
0, 0, TEXTURE_WIDTH, TEXTURE_HEIGHT, // dst rect
GL_COLOR_BUFFER_BIT, // buffer mask
GL_LINEAR); // scale filter
// trigger mipmaps generation explicitly
// NOTE: If GL_GENERATE_MIPMAP is set to GL_TRUE, then glCopyTexSubImage2D()
// triggers mipmap generation automatically. However, the texture attached
// onto a FBO should generate mipmaps manually via glGenerateMipmap().
glBindTexture(GL_TEXTURE_2D, textureId);
glGenerateMipmap(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
// back to normal window-system-provided framebuffer
glBindFramebuffer(GL_FRAMEBUFFER, 0); // unbind
}
// without MSAA
// render to non MSAA FBO
else
{
// set the rendering destination to FBO
glBindFramebuffer(GL_FRAMEBUFFER, fboId);
// clear buffer
glClearColor(1, 1, 1, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// draw a rotating object at the origin
glPushMatrix();
glRotatef(angle*0.5f, 1, 0, 0);
glRotatef(angle, 0, 1, 0);
glRotatef(angle*0.7f, 0, 0, 1);
glTranslatef(0, -1.575f, 0);
drawTeapot();
glPopMatrix();
// trigger mipmaps generation explicitly
// NOTE: If GL_GENERATE_MIPMAP is set to GL_TRUE, then glCopyTexSubImage2D()
// triggers mipmap generation automatically. However, the texture attached
// onto a FBO should generate mipmaps manually via glGenerateMipmap().
glBindTexture(GL_TEXTURE_2D, textureId);
glGenerateMipmap(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
// back to normal window-system-provided framebuffer
glBindFramebuffer(GL_FRAMEBUFFER, 0); // unbind
}
// measure the elapsed time of render-to-texture
t1.stop();
renderToTextureTime = t1.getElapsedTimeInMilliSec();
///////////////////////////////////////////////////////////////////////////
// rendering as normal ////////////////////////////////////////////////////
// back to normal viewport and projection matrix
toPerspective();
// tramsform camera
glTranslatef(0, 0, -cameraDistance);
glRotatef(cameraAngleX, 1, 0, 0); // pitch
glRotatef(cameraAngleY, 0, 1, 0); // heading
// clear framebuffer
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
glPushMatrix();
// draw a cube with the dynamic texture
draw();
glPopMatrix();
// draw info messages
showInfo();
showFPS();
glutSwapBuffers();
}
void TextureCache::generateTexture(SkBitmap* bitmap, Texture* texture, bool regenerate) {
SkAutoLockPixels alp(*bitmap);
if (!bitmap->readyToDraw()) {
ALOGE("Cannot generate texture from bitmap");
return;
}
// We could also enable mipmapping if both bitmap dimensions are powers
// of 2 but we'd have to deal with size changes. Let's keep this simple
const bool canMipMap = Extensions::getInstance().hasNPot();
// If the texture had mipmap enabled but not anymore,
// force a glTexImage2D to discard the mipmap levels
const bool resize = !regenerate || bitmap->width() != int(texture->width) ||
bitmap->height() != int(texture->height) ||
(regenerate && canMipMap && texture->mipMap && !bitmap->hasHardwareMipMap());
if (!regenerate) {
glGenTextures(1, &texture->id);
}
texture->generation = bitmap->getGenerationID();
texture->width = bitmap->width();
texture->height = bitmap->height();
Caches::getInstance().bindTexture(texture->id);
switch (bitmap->getConfig()) {
case SkBitmap::kA8_Config:
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
uploadToTexture(resize, GL_ALPHA, bitmap->rowBytesAsPixels(),
texture->width, texture->height, GL_UNSIGNED_BYTE, bitmap->getPixels());
texture->blend = true;
break;
case SkBitmap::kRGB_565_Config:
glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
uploadToTexture(resize, GL_RGB, bitmap->rowBytesAsPixels(),
texture->width, texture->height, GL_UNSIGNED_SHORT_5_6_5, bitmap->getPixels());
texture->blend = false;
break;
case SkBitmap::kARGB_8888_Config:
glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
uploadToTexture(resize, GL_RGBA, bitmap->rowBytesAsPixels(),
texture->width, texture->height, GL_UNSIGNED_BYTE, bitmap->getPixels());
// Do this after calling getPixels() to make sure Skia's deferred
// decoding happened
texture->blend = !bitmap->isOpaque();
break;
case SkBitmap::kARGB_4444_Config:
case SkBitmap::kIndex8_Config:
glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
uploadLoFiTexture(resize, bitmap, texture->width, texture->height);
texture->blend = !bitmap->isOpaque();
break;
default:
ALOGW("Unsupported bitmap config: %d", bitmap->getConfig());
break;
}
if (canMipMap) {
texture->mipMap = bitmap->hasHardwareMipMap();
if (texture->mipMap) {
glGenerateMipmap(GL_TEXTURE_2D);
}
}
if (!regenerate) {
texture->setFilter(GL_NEAREST);
texture->setWrap(GL_CLAMP_TO_EDGE);
}
}
GLuint loadBMP_custom(const char * imagepath){
printf("Reading image %s\n", imagepath);
// Data read from the header of the BMP file
unsigned char header[54];
unsigned int dataPos;
unsigned int imageSize;
unsigned int width, height;
// Actual RGB data
unsigned char * data;
// Open the file
FILE * file = fopen(imagepath,"rb");
if (!file) {printf("%s could not be opened. Are you in the right directory ? Don't forget to read the FAQ !\n", imagepath); getchar(); return 0;}
// Read the header, i.e. the 54 first bytes
// If less than 54 bytes are read, problem
if ( fread(header, 1, 54, file)!=54 ){
printf("Not a correct BMP file\n");
return 0;
}
// A BMP files always begins with "BM"
if ( header[0]!='B' || header[1]!='M' ){
printf("Not a correct BMP file\n");
return 0;
}
// Make sure this is a 24bpp file
if ( *(int*)&(header[0x1E])!=0 ) {printf("Not a correct BMP file\n"); return 0;}
if ( *(int*)&(header[0x1C])!=24 ) {printf("Not a correct BMP file\n"); return 0;}
// Read the information about the image
dataPos = *(int*)&(header[0x0A]);
imageSize = *(int*)&(header[0x22]);
width = *(int*)&(header[0x12]);
height = *(int*)&(header[0x16]);
// Some BMP files are misformatted, guess missing information
if (imageSize==0) imageSize=width*height*3; // 3 : one byte for each Red, Green and Blue component
if (dataPos==0) dataPos=54; // The BMP header is done that way
// Create a buffer
data = new unsigned char [imageSize];
// Read the actual data from the file into the buffer
fread(data,1,imageSize,file);
// Everything is in memory now, the file wan be closed
fclose (file);
// Create one OpenGL texture
GLuint textureID;
glGenTextures(1, &textureID);
// "Bind" the newly created texture : all future texture functions will modify this texture
glBindTexture(GL_TEXTURE_2D, textureID);
// Give the image to OpenGL
glTexImage2D(GL_TEXTURE_2D, 0,GL_RGB, width, height, 0, GL_BGR, GL_UNSIGNED_BYTE, data);
// OpenGL has now copied the data. Free our own version
delete [] data;
// Poor filtering, or ...
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
// ... nice trilinear filtering.
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glGenerateMipmap(GL_TEXTURE_2D);
// Return the ID of the texture we just created
return textureID;
}
PIGLIT_GL_TEST_CONFIG_END
/**
* Test textures having integer or depth-stencil internalFormat with
* glGenerateMipmap. GL_INVALID_OPERATION should be thrown by the
* implementation.
*/
static bool
test_genmipmap_errors(void)
{
GLuint tex;
static const struct {
GLenum intFormat, srcFormat, srcType;
const char *extension[2];
} formats[] = {
/* Integer internal formats */
{ GL_RGBA8I_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_RGBA16I_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_RGBA32I_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_RGB8I_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_RGB16I_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL } },
{ GL_RGB32I, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_RG32I, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", "GL_ARB_texture_rg"} },
{ GL_R32I, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", "GL_ARB_texture_rg"} },
{ GL_ALPHA8I_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_LUMINANCE8I_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_INTENSITY8I_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_LUMINANCE_ALPHA8I_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_RGBA8UI_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_RGBA16UI_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_RGBA32UI_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_RGB8UI_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_RGB16UI_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer" } },
{ GL_RGB32UI_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_RG32UI, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", "GL_ARB_texture_rg"} },
{ GL_R32UI, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", "GL_ARB_texture_rg"} },
{ GL_ALPHA8UI_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_LUMINANCE8UI_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_INTENSITY8UI_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
{ GL_LUMINANCE_ALPHA8UI_EXT, GL_RGBA_INTEGER, GL_INT,
{"GL_EXT_texture_integer", NULL} },
/* Packed depth / stencil formats */
{ GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8,
{"GL_EXT_packed_depth_stencil", NULL} },
{ GL_DEPTH32F_STENCIL8, GL_DEPTH_STENCIL, GL_FLOAT_32_UNSIGNED_INT_24_8_REV,
{"GL_ARB_depth_buffer_float", NULL} }
};
int i, j;
bool pass = true;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
for (i = 0; i < ARRAY_SIZE(formats); i++) {
bool is_ext_supported = true;
for (j = 0; j < ARRAY_SIZE(formats[i].extension); j++) {
if ((formats[i].extension[j] != NULL) &&
!piglit_is_extension_supported(formats[i].extension[j]))
{
printf("Skipping %s\n",
piglit_get_gl_enum_name(formats[i].intFormat));
is_ext_supported = false;
}
}
if (!is_ext_supported)
continue;
glTexImage2D(GL_TEXTURE_2D, 0, formats[i].intFormat,
16, 16, 0,
formats[i].srcFormat, formats[i].srcType, NULL);
pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
glGenerateMipmap(GL_TEXTURE_2D);
pass = piglit_check_gl_error(GL_INVALID_OPERATION) && pass;
}
glDeleteTextures(1, &tex);
return pass;
}
//----------------------------------------------------------
void ofTexture::generateMipmap(){
// Generate mipmaps using hardware-accelerated core GL methods.
// 1. Check whether the current OpenGL version supports mipmap generation:
// glGenerateMipmap() was introduced to OpenGL core in 3.0, and
// OpenGLES core in 2.0 but earlier versions may support it if they
// support extension GL_EXT_framebuffer_object
bool isGlGenerateMipmapAvailable = false;
#ifdef TARGET_OPENGLES
if (ofGetOpenGLESVersion() >= 2) isGlGenerateMipmapAvailable = true;
#else
if (ofGetOpenGLVersionMajor() >= 3) isGlGenerateMipmapAvailable = true;
#endif
if (!isGlGenerateMipmapAvailable && !ofGLCheckExtension("GL_EXT_framebuffer_object")) {
static bool versionWarningIssued = false;
if (!versionWarningIssued) ofLogWarning() << "Your current OpenGL version does not support mipmap generation via glGenerateMipmap().";
versionWarningIssued = true;
texData.hasMipmap = false;
return;
}
// 2. Check whether the texture's texture target supports mipmap generation.
switch (texData.textureTarget) {
/// OpenGL ES only supports mipmap for the following two texture targets:
case GL_TEXTURE_2D:
case GL_TEXTURE_CUBE_MAP:
#ifndef TARGET_OPENGLES
/// OpenGL supports mipmaps for additional texture targets:
case GL_TEXTURE_1D:
case GL_TEXTURE_3D:
case GL_TEXTURE_1D_ARRAY:
case GL_TEXTURE_2D_ARRAY:
#endif
{
// All good, this particular texture target supports mipmaps.
// glEnable(texData.textureTarget); /// < uncomment this hack if you are unlucky enough to run an older ATI card.
// See also: https://www.opengl.org/wiki/Common_Mistakes#Automatic_mipmap_generation
glBindTexture(texData.textureTarget, (GLuint) texData.textureID);
glGenerateMipmap(texData.textureTarget);
glBindTexture(texData.textureTarget, 0);
texData.hasMipmap = true;
break;
}
default:
{
// This particular texture target does not support mipmaps.
static bool warningIssuedAlready = false;
if (!warningIssuedAlready){
ofLogWarning() << "Mipmaps are not supported for textureTarget 0x" << hex << texData.textureTarget << endl
<< "Most probably you are trying to create mipmaps from a GL_TEXTURE_RECTANGLE texture." << endl
<< "Try ofDisableArbTex() before loading this texture.";
warningIssuedAlready = true;
}
texData.hasMipmap = false;
break;
}
} // end switch(texData.textureTarget)
}
void agp_update_vstore(struct storage_info_t* s, bool copy)
{
if (s->txmapped == TXSTATE_OFF)
return;
FLAG_DIRTY();
if (!copy)
glBindTexture(GL_TEXTURE_2D, s->vinf.text.glid);
else{
glGenTextures(1, &s->vinf.text.glid);
/* for the launch_resume and resize states, were we'd push a new
* update but have multiple references */
if (s->refcount == 0)
s->refcount = 1;
glBindTexture(GL_TEXTURE_2D, s->vinf.text.glid);
}
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, s->txu == ARCAN_VTEX_REPEAT ?
GL_REPEAT : GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, s->txv == ARCAN_VTEX_REPEAT ?
GL_REPEAT : GL_CLAMP_TO_EDGE);
int filtermode = s->filtermode & (~ARCAN_VFILTER_MIPMAP);
bool mipmap = s->filtermode & ARCAN_VFILTER_MIPMAP;
/*
* Mipmapping still misses the option to manually define mipmap levels
*/
if (copy){
#ifndef GL_GENERATE_MIPMAP
if (mipmap)
glGenerateMipmap(GL_TEXTURE_2D);
#else
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, mipmap);
#endif
}
switch (filtermode){
case ARCAN_VFILTER_NONE:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
break;
case ARCAN_VFILTER_LINEAR:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
break;
case ARCAN_VFILTER_BILINEAR:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
break;
case ARCAN_VFILTER_TRILINEAR:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
break;
}
if (copy){
s->update_ts = arcan_timemillis();
if (s->txmapped == TXSTATE_DEPTH)
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, s->w, s->h, 0,
GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, 0);
else
glTexImage2D(GL_TEXTURE_2D, 0, GL_PIXEL_FORMAT, s->w, s->h,
0, GL_PIXEL_FORMAT, GL_UNSIGNED_BYTE, s->vinf.text.raw);
}
#ifndef HEADLESS_NOARCAN
if (arcan_video_display.conservative){
arcan_mem_free(s->vinf.text.raw);
s->vinf.text.raw = NULL;
s->vinf.text.s_raw = 0;
}
#endif
glBindTexture(GL_TEXTURE_2D, 0);
}
GLuint LoadTGA(const char *file_path) // load TGA file to memory
{
std::ifstream fileStream(file_path, std::ios::binary);
if(!fileStream.is_open()) {
std::cout << "Impossible to open " << file_path << ". Are you in the right directory ?\n";
return 0;
}
GLubyte header[ 18 ]; // first 6 useful header bytes
GLuint bytesPerPixel; // number of bytes per pixel in TGA gile
GLuint imageSize; // for setting memory
GLubyte * data;
GLuint texture = 0;
unsigned width, height;
fileStream.read((char*)header, 18);
width = header[12] + header[13] * 256;
height = header[14] + header[15] * 256;
if( width <= 0 || // is width <= 0
height <= 0 || // is height <=0
(header[16] != 24 && header[16] != 32)) // is TGA 24 or 32 Bit
{
fileStream.close(); // close file on failure
std::cout << "File header error.\n";
return 0;
}
bytesPerPixel = header[16] / 8; //divide by 8 to get bytes per pixel
imageSize = width * height * bytesPerPixel; // calculate memory required for TGA data
data = new GLubyte[ imageSize ];
fileStream.seekg(18, std::ios::beg);
fileStream.read((char *)data, imageSize);
fileStream.close();
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
if(bytesPerPixel == 3)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_BGR, GL_UNSIGNED_BYTE, data);
else //bytesPerPixel == 4
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_BGRA, GL_UNSIGNED_BYTE, data);
glGenerateMipmap(GL_TEXTURE_2D);
float maxAnisotropy = 1.f;
glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &maxAnisotropy);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, (GLint)maxAnisotropy);
//to do: modify the texture parameters code from here
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
//end of modifiable code
delete []data;
return texture;
}
// The MAIN function, from here we start the application and run the game loop
int main()
{
// Init GLFW
glfwInit();
// Set all the required options for GLFW
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
// On mac os, must have this config.
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
// Create a GLFWwindow object that we can use for GLFW's functions
GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, "LearnOpenGL", nullptr, nullptr);
glfwMakeContextCurrent(window);
// Set the required callback functions
glfwSetKeyCallback(window, key_callback);
// Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
glewExperimental = GL_TRUE;
// Initialize GLEW to setup the OpenGL Function pointers
glewInit();
// Define the viewport dimensions
glViewport(0, 0, WIDTH, HEIGHT);
glEnable(GL_DEPTH_TEST);
// Build and compile our shader program
ShaderProgram ourShader("/Users/Evan/Documents/XcodeWorkspace/OpenGLCoreStudy/OpenGLCoreStudy/TestCode/GLSL/First3DObjects.vsh", "/Users/Evan/Documents/XcodeWorkspace/OpenGLCoreStudy/OpenGLCoreStudy/TestCode/GLSL/First3DObjects.fsh");
// Set up vertex data (and buffer(s)) and attribute pointers
GLfloat vertices[] = {
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, 1.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f
};
glm::vec3 cubePositions[] = {
glm::vec3( 0.0f, 0.0f, 0.0f),
glm::vec3( 2.0f, 5.0f, -15.0f),
glm::vec3(-1.5f, -2.2f, -2.5f),
glm::vec3(-3.8f, -2.0f, -12.3f),
glm::vec3( 2.4f, -0.4f, -3.5f),
glm::vec3(-1.7f, 3.0f, -7.5f),
glm::vec3( 1.3f, -2.0f, -2.5f),
glm::vec3( 1.5f, 2.0f, -2.5f),
glm::vec3( 1.5f, 0.2f, -1.5f),
glm::vec3(-1.3f, 1.0f, -1.5f)
};
GLuint VBO, VAO;
glGenVertexArrays(1, &VAO);
glGenBuffers(1, &VBO);
glBindVertexArray(VAO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
// Position attribute
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
// TexCoord attribute
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(2);
glBindVertexArray(0); // Unbind VAO
// Load and create a texture
GLuint texture1;
GLuint texture2;
// ====================
// Texture 1
// ====================
glGenTextures(1, &texture1);
glBindTexture(GL_TEXTURE_2D, texture1); // All upcoming GL_TEXTURE_2D operations now have effect on our texture object
// Set our texture parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); // Set texture wrapping to GL_REPEAT
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// Set texture filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Load, create texture and generate mipmaps
int width, height;
unsigned char* image = SOIL_load_image("/Users/Evan/Documents/XcodeWorkspace/OpenGLCoreStudy/OpenGLCoreStudy/Resource/Image/container.jpg", &width, &height, 0, SOIL_LOAD_RGB);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
SOIL_free_image_data(image);
glBindTexture(GL_TEXTURE_2D, 0); // Unbind texture when done, so we won't accidentily mess up our texture.
// ===================
// Texture 2
// ===================
glGenTextures(1, &texture2);
glBindTexture(GL_TEXTURE_2D, texture2);
// Set our texture parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// Set texture filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Load, create texture and generate mipmaps
image = SOIL_load_image("/Users/Evan/Documents/XcodeWorkspace/OpenGLCoreStudy/OpenGLCoreStudy/Resource/Image/awesomeface.png", &width, &height, 0, SOIL_LOAD_RGB);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
SOIL_free_image_data(image);
glBindTexture(GL_TEXTURE_2D, 0);
// Game loop
while (!glfwWindowShouldClose(window))
{
GLfloat currentFrame = glfwGetTime();
deltaTime = currentFrame - lastFrame;
lastFrame = currentFrame;
// Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
glfwPollEvents();
do_movement();
// Render
// Clear the colorbuffer
glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Bind Textures using texture units
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture1);
glUniform1i(glGetUniformLocation(ourShader.program, "ourTexture1"), 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, texture2);
glUniform1i(glGetUniformLocation(ourShader.program, "ourTexture2"), 1);
// Activate shader
ourShader.useShader();
// Camera/View transformation
glm::mat4 view;
view = glm::lookAt(cameraPos, cameraPos + cameraFront, cameraUp);
// Projection
glm::mat4 projection;
projection = glm::perspective(45.0f, (GLfloat)WIDTH / (GLfloat)HEIGHT, 0.1f, 100.0f);
// Get the uniform locations
GLint modelLoc = glGetUniformLocation(ourShader.program, "model");
GLint viewLoc = glGetUniformLocation(ourShader.program, "view");
GLint projLoc = glGetUniformLocation(ourShader.program, "projection");
// Pass the matrices to the shader
glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(view));
glUniformMatrix4fv(projLoc, 1, GL_FALSE, glm::value_ptr(projection));
glBindVertexArray(VAO);
for (GLuint i = 0; i < 10; i++)
{
// Calculate the model matrix for each object and pass it to shader before drawing
glm::mat4 model;
model = glm::translate(model, cubePositions[i]);
GLfloat angle = 20.0f * i;
model = glm::rotate(model, angle, glm::vec3(1.0f, 0.3f, 0.5f));
glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
glDrawArrays(GL_TRIANGLES, 0, 36);
}
glBindVertexArray(0);
// Swap the screen buffers
glfwSwapBuffers(window);
}
// Properly de-allocate all resources once they've outlived their purpose
glDeleteVertexArrays(1, &VAO);
glDeleteBuffers(1, &VBO);
// Terminate GLFW, clearing any resources allocated by GLFW.
glfwTerminate();
return 0;
}
void CubeMap::CubeMap::generateMipMaps()
{
glBindTexture( GL_TEXTURE_CUBE_MAP, m_handle );
glGenerateMipmap( GL_TEXTURE_CUBE_MAP );
glBindTexture( GL_TEXTURE_CUBE_MAP, 0 );
}
/** Render a glyph for a character into bitmap and save it into the glyph page.
* \param c The character to be loaded.
* \param c \ref GlyphInfo for the character.
*/
void FontWithFace::insertGlyph(wchar_t c, const GlyphInfo& gi)
{
assert(gi.glyph_index > 0);
assert(gi.font_number < m_face_ttf->getTotalFaces());
FT_Face cur_face = m_face_ttf->getFace(gi.font_number);
FT_GlyphSlot slot = cur_face->glyph;
// Same face may be shared across the different FontWithFace,
// so reset dpi each time
font_manager->checkFTError(FT_Set_Pixel_Sizes(cur_face, 0, getDPI()),
"setting DPI");
font_manager->checkFTError(FT_Load_Glyph(cur_face, gi.glyph_index,
FT_LOAD_DEFAULT), "loading a glyph");
font_manager->checkFTError(shapeOutline(&(slot->outline)),
"shaping outline");
font_manager->checkFTError(FT_Render_Glyph(slot, FT_RENDER_MODE_NORMAL),
"rendering a glyph to bitmap");
// Convert to an anti-aliased bitmap
FT_Bitmap* bits = &(slot->bitmap);
core::dimension2du texture_size(bits->width + 1, bits->rows + 1);
if ((m_used_width + texture_size.Width > getGlyphPageSize() &&
m_used_height + m_current_height + texture_size.Height >
getGlyphPageSize()) ||
m_used_height + texture_size.Height > getGlyphPageSize())
{
// Add a new glyph page if current one is full
createNewGlyphPage();
}
// Determine the linebreak location
if (m_used_width + texture_size.Width > getGlyphPageSize())
{
m_used_width = 0;
m_used_height += m_current_height;
m_current_height = 0;
}
const unsigned int cur_tex = m_spritebank->getTextureCount() -1;
#ifndef SERVER_ONLY
if (bits->buffer != NULL)
{
video::ITexture* tex = m_spritebank->getTexture(cur_tex);
glBindTexture(GL_TEXTURE_2D, tex->getOpenGLTextureName());
assert(bits->pixel_mode == FT_PIXEL_MODE_GRAY);
if (CVS->isARBTextureSwizzleUsable())
{
glTexSubImage2D(GL_TEXTURE_2D, 0, m_used_width, m_used_height,
bits->width, bits->rows, GL_RED, GL_UNSIGNED_BYTE,
bits->buffer);
}
else
{
const unsigned int size = bits->width * bits->rows;
uint8_t* image_data = new uint8_t[size * 4];
memset(image_data, 255, size * 4);
for (unsigned int i = 0; i < size; i++)
image_data[4 * i + 3] = bits->buffer[i];
glTexSubImage2D(GL_TEXTURE_2D, 0, m_used_width, m_used_height,
bits->width, bits->rows, GL_RGBA, GL_UNSIGNED_BYTE,
image_data);
delete[] image_data;
}
if (tex->hasMipMaps())
glGenerateMipmap(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
}
#endif
// Store the rectangle of current glyph
gui::SGUISpriteFrame f;
gui::SGUISprite s;
core::rect<s32> rectangle(m_used_width, m_used_height,
m_used_width + bits->width, m_used_height + bits->rows);
f.rectNumber = m_spritebank->getPositions().size();
f.textureNumber = cur_tex;
// Add frame to sprite
s.Frames.push_back(f);
s.frameTime = 0;
m_spritebank->getPositions().push_back(rectangle);
m_spritebank->getSprites().push_back(s);
// Save glyph metrics
FontArea a;
a.advance_x = cur_face->glyph->advance.x / BEARING;
a.bearing_x = cur_face->glyph->metrics.horiBearingX / BEARING;
const int cur_height = (cur_face->glyph->metrics.height / BEARING);
const int cur_offset_y = cur_height -
(cur_face->glyph->metrics.horiBearingY / BEARING);
a.offset_y = m_glyph_max_height - cur_height + cur_offset_y;
a.offset_y_bt = -cur_offset_y;
a.spriteno = f.rectNumber;
m_character_area_map[c] = a;
// Store used area
m_used_width += texture_size.Width;
if (m_current_height < texture_size.Height)
m_current_height = texture_size.Height;
} // insertGlyph
void Texture2D::generateMipMaps()
{
glBindTexture( GL_TEXTURE_2D, m_handle );
glGenerateMipmap( GL_TEXTURE_2D );
glBindTexture( GL_TEXTURE_2D, 0 );
}
void myinit(void)
{
// Load shaders and use the resulting shader program
GLuint program = InitShader( "vshader.glsl", "fshader.glsl" );
glUseProgram(program);
// Generate vertex arrays for geometric shapes
generateCube(program, &cubeData);
generateSphere(program, &sphereData);
generateCone(program, &coneData);
generateCylinder(program, &cylData);
uModelView = glGetUniformLocation( program, "ModelView" );
uProjection = glGetUniformLocation( program, "Projection" );
uView = glGetUniformLocation( program, "View" );
glClearColor( 0.1, 0.1, 0.2, 1.0 ); // dark blue background
uAmbient = glGetUniformLocation( program, "AmbientProduct" );
uDiffuse = glGetUniformLocation( program, "DiffuseProduct" );
uSpecular = glGetUniformLocation( program, "SpecularProduct" );
uLightPos = glGetUniformLocation( program, "LightPosition" );
uShininess = glGetUniformLocation( program, "Shininess" );
uTex = glGetUniformLocation( program, "Tex" );
uEnableTex = glGetUniformLocation( program, "EnableTex" );
glUniform4f(uAmbient, 0.2f, 0.2f, 0.2f, 1.0f);
glUniform4f(uDiffuse, 0.6f, 0.6f, 0.6f, 1.0f);
glUniform4f(uSpecular, 0.2f, 0.2f, 0.2f, 1.0f);
glUniform4f(uLightPos, 15.0f, 15.0f, 30.0f, 0.0f);
glUniform1f(uShininess, 100.0f);
glEnable(GL_DEPTH_TEST);
TgaImage coolImage;
if (!coolImage.loadTGA("challenge.tga"))
{
printf("Error loading image file\n");
exit(1);
}
TgaImage earthImage;
if (!earthImage.loadTGA("earth.tga"))
{
printf("Error loading image file\n");
exit(1);
}
glGenTextures( 1, &texture_cube );
glBindTexture( GL_TEXTURE_2D, texture_cube );
glTexImage2D(GL_TEXTURE_2D, 0, 4, coolImage.width, coolImage.height, 0,
(coolImage.byteCount == 3) ? GL_BGR : GL_BGRA,
GL_UNSIGNED_BYTE, coolImage.data );
glGenerateMipmap(GL_TEXTURE_2D);
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glGenTextures( 1, &texture_earth );
glBindTexture( GL_TEXTURE_2D, texture_earth );
glTexImage2D(GL_TEXTURE_2D, 0, 4, earthImage.width, earthImage.height, 0,
(earthImage.byteCount == 3) ? GL_BGR : GL_BGRA,
GL_UNSIGNED_BYTE, earthImage.data );
glGenerateMipmap(GL_TEXTURE_2D);
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
//glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
//glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
// Set texture sampler variable to texture unit 0
// (set in glActiveTexture(GL_TEXTURE0))
glUniform1i( uTex, 0);
Arcball = new BallData ;
Ball_Init(Arcball);
Ball_Place(Arcball,qOne,0.75);
}
GLuint createTextureFromTga(const char * path)
{
long length;
char * buffer = getTextFileContent(path, &length);
const TgaHeader * header = (TgaHeader *) buffer;
GLint format;
GLint internalFormat;
GLuint texture;
const GLvoid * imgData;
if (buffer == NULL)
{
return 0;
}
if (length <= (signed long) sizeof(TgaHeader))
{
fprintf(stderr, "Too small TGA file: %s\n", path);
free(buffer);
return 0;
}
if (header->datatype != 2 ||
(header->bitperpel != 24 && header->bitperpel != 32))
{
fprintf(stderr, "Wrong TGA file format: %s\n", path);
free(buffer);
return 0;
}
format = (header->bitperpel == 24 ? GL_BGR : GL_BGRA);
internalFormat = (format == GL_BGR ? GL_RGB8 : GL_RGBA8);
imgData = (const GLvoid *)
(buffer + sizeof(TgaHeader) + header->idlength);
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
/* Set 1-byte alignment (for non (2^n)x(2^n) size textures). */
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexImage2D(GL_TEXTURE_2D, 0, internalFormat,
header->width, header->height, 0, format,
GL_UNSIGNED_BYTE, imgData);
free(buffer);
#if 0
/* Linear filtering */
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
/*glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);*/
#else
glGenerateMipmap(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
#endif
#if 0
/* No wrap */
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
#else
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
#endif
CHECK_OPENGL_ERRORS(__FILE__, __LINE__);
return texture;
}
//----------------------------------------------------------------------------------------------------------------------
//This virtual function is called whenever the widget needs to be painted.
// this is our main drawing routine
void GLWindow::paintGL()
{
//----------------------------------------------------------------------------------------------------------------------
// Pass 1 render our Depth texture to the FBO
//----------------------------------------------------------------------------------------------------------------------
// enable culling
glEnable(GL_CULL_FACE);
glEnable(GL_MULTISAMPLE_ARB);
// bind the FBO and render offscreen to the texture
glBindFramebuffer(GL_FRAMEBUFFER,m_fboID);
// bind the texture object to 0 (off )
glBindTexture(GL_TEXTURE_2D,0);
// we need to render to the same size as the texture to avoid
// distortions
glViewport(0,0,m_textureSize,m_textureSize);
// Clear previous frame values
glClear( GL_DEPTH_BUFFER_BIT);
// as we are only rendering depth turn off the colour / alpha
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
// render only the back faces so we don't get too much self shadowing
glCullFace(GL_FRONT);
glEnable(GL_POLYGON_OFFSET_FILL);
glPolygonOffset(m_polyOffsetFactor,m_polyOffsetScale );
// set the shape of the camera before rendering
m_lightCamera->setShape(m_fov,1.0,m_zNear,m_zfar);
// draw the scene from the POV of the light
drawScene(&GLWindow::loadToLightPOVShader);
//----------------------------------------------------------------------------------------------------------------------
// Pass two use the texture
// now we have created the texture for shadows render the scene properly
//----------------------------------------------------------------------------------------------------------------------
// go back to our normal framebuffer
glBindFramebuffer(GL_FRAMEBUFFER,0);
// set the viewport to the screen dimensions
glViewport(0,0,m_width,m_height);
// enable colour rendering again (as we turned it off earlier)
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
// clear the screen
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// bind the shadow texture
glBindTexture(GL_TEXTURE_2D,m_textureID);
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE );
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
glTexParameteri( GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_LUMINANCE );
// we need to generate the mip maps each time we bind
glGenerateMipmap(GL_TEXTURE_2D);
// now only cull back faces
glDisable(GL_CULL_FACE);
// render our scene with the shadow shader
drawScene(&GLWindow::loadMatricesToShadowShader);
//----------------------------------------------------------------------------------------------------------------------
// this draws the debug texture on the quad
//----------------------------------------------------------------------------------------------------------------------
if(m_drawDebugQuad)
{
glBindTexture(GL_TEXTURE_2D,m_textureID);
// glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_NONE );
// glTexParameteri( GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_LUMINANCE );
debugTexture(-0.6,-1,0.6,1);
}
//----------------------------------------------------------------------------------------------------------------------
// now we draw a cube to visualise the light
//----------------------------------------------------------------------------------------------------------------------
ngl::VAOPrimitives *prim=ngl::VAOPrimitives::instance();
ngl::ShaderLib *shader = ngl::ShaderLib::instance();
shader->use("Colour");
m_transform.reset();
m_transform.setPosition(m_lightPosition);
ngl::Mat4 MVP=m_transform.getMatrix() * m_mouseGlobalTX *
m_cam->getVPMatrix();
shader->setShaderParamFromMat4("MVP",MVP);
prim->draw("cube");
}
void myinit()
{
GLint err = glGetError();
assert(err==GL_NO_ERROR);
// GLfloat light_ambient[] = { btScalar(0.2), btScalar(0.2), btScalar(0.2), btScalar(1.0) };
GLfloat light_ambient[] = { btScalar(1.0), btScalar(1.2), btScalar(0.2), btScalar(1.0) };
GLfloat light_diffuse[] = { btScalar(1.0), btScalar(1.0), btScalar(1.0), btScalar(1.0) };
GLfloat light_specular[] = { btScalar(1.0), btScalar(1.0), btScalar(1.0), btScalar(1.0 )};
/* light_position is NOT default value */
GLfloat light_position0[] = { btScalar(10000.0), btScalar(10000.0), btScalar(10000.0), btScalar(0.0 )};
GLfloat light_position1[] = { btScalar(-1.0), btScalar(-10.0), btScalar(-1.0), btScalar(0.0) };
// glShadeModel(GL_FLAT);//GL_SMOOTH);
//glShadeModel(GL_SMOOTH);
err = glGetError();
assert(err==GL_NO_ERROR);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
err = glGetError();
assert(err==GL_NO_ERROR);
glClearColor(float(0.7),float(0.7),float(0.7),float(0));
//glEnable(GL_LIGHTING);
//glEnable(GL_LIGHT0);
err = glGetError();
assert(err==GL_NO_ERROR);
static bool m_textureenabled = true;
static bool m_textureinitialized = false;
err = glGetError();
assert(err==GL_NO_ERROR);
if(m_textureenabled)
{
if(!m_textureinitialized)
{
glActiveTexture(GL_TEXTURE0);
GLubyte* image=new GLubyte[256*256*3];
for(int y=0;y<256;++y)
{
const int t=y>>5;
GLubyte* pi=image+y*256*3;
for(int x=0;x<256;++x)
{
if (x<2||y<2||x>253||y>253)
{
pi[0]=0;
pi[1]=0;
pi[2]=0;
} else
{
pi[0]=255;
pi[1]=255;
pi[2]=255;
}
/*
const int s=x>>5;
const GLubyte b=180;
GLubyte c=b+((s+t&1)&1)*(255-b);
pi[0]=c;
pi[1]=c;
pi[2]=c;
*/
pi+=3;
}
}
glGenTextures(1,(GLuint*)&m_texturehandle);
glBindTexture(GL_TEXTURE_2D,m_texturehandle);
err = glGetError();
assert(err==GL_NO_ERROR);
#if 0
glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE);
err = glGetError();
assert(err==GL_NO_ERROR);
glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR);
err = glGetError();
assert(err==GL_NO_ERROR);
glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
err = glGetError();
assert(err==GL_NO_ERROR);
glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);
err = glGetError();
assert(err==GL_NO_ERROR);
glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);
err = glGetError();
assert(err==GL_NO_ERROR);
#endif
err = glGetError();
assert(err==GL_NO_ERROR);
int filter=1;
// Build2DMipmaps(3,256,256,GL_RGB,image,filter);
//gluBuild2DMipmaps(GL_TEXTURE_2D,GL_RGBA,256,256,GL_RGB,GL_UNSIGNED_BYTE,image);
//glTexParameterf(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 256,256,0,GL_RGB,GL_UNSIGNED_BYTE,image);
glGenerateMipmap(GL_TEXTURE_2D);
err = glGetError();
assert(err==GL_NO_ERROR);
delete[] image;
m_textureinitialized=true;
}
// glMatrixMode(GL_TEXTURE);
// glLoadIdentity();
// glMatrixMode(GL_MODELVIEW);
err = glGetError();
assert(err==GL_NO_ERROR);
glBindTexture(GL_TEXTURE_2D,m_texturehandle);
err = glGetError();
assert(err==GL_NO_ERROR);
} else
//-----------------------------------------------------------------------------
// Very fast texture-to-texture blitter and hardware bi/trilinear scaling implementation using FBO
// Destination texture must be 1D, 2D, 3D, or Cube
// Source texture must be 1D, 2D or 3D
// Supports compressed formats as both source and destination format, it will use the hardware DXT compressor
// if available.
// @author W.J. van der Laan
void GLES2TextureBuffer::blitFromTexture(GLES2TextureBuffer *src, const Image::Box &srcBox, const Image::Box &dstBox)
{
return; // todo - add a shader attach...
// std::cerr << "GLES2TextureBuffer::blitFromTexture " <<
// src->mTextureID << ":" << srcBox.left << "," << srcBox.top << "," << srcBox.right << "," << srcBox.bottom << " " <<
// mTextureID << ":" << dstBox.left << "," << dstBox.top << "," << dstBox.right << "," << dstBox.bottom << std::endl;
// Store reference to FBO manager
GLES2FBOManager *fboMan = static_cast<GLES2FBOManager *>(GLES2RTTManager::getSingletonPtr());
RenderSystem* rsys = Root::getSingleton().getRenderSystem();
rsys->_disableTextureUnitsFrom(0);
glActiveTexture(GL_TEXTURE0);
// Disable alpha, depth and scissor testing, disable blending,
// and disable culling
glDisable(GL_DEPTH_TEST);
glDisable(GL_SCISSOR_TEST);
glDisable(GL_BLEND);
glDisable(GL_CULL_FACE);
// Set up source texture
OGRE_CHECK_GL_ERROR(glBindTexture(src->mTarget, src->mTextureID));
// Set filtering modes depending on the dimensions and source
if(srcBox.getWidth()==dstBox.getWidth() &&
srcBox.getHeight()==dstBox.getHeight() &&
srcBox.getDepth()==dstBox.getDepth())
{
// Dimensions match -- use nearest filtering (fastest and pixel correct)
OGRE_CHECK_GL_ERROR(glTexParameteri(src->mTarget, GL_TEXTURE_MIN_FILTER, GL_NEAREST));
OGRE_CHECK_GL_ERROR(glTexParameteri(src->mTarget, GL_TEXTURE_MAG_FILTER, GL_NEAREST));
}
else
{
// Dimensions don't match -- use bi or trilinear filtering depending on the
// source texture.
if(src->mUsage & TU_AUTOMIPMAP)
{
// Automatic mipmaps, we can safely use trilinear filter which
// brings greatly improved quality for minimisation.
OGRE_CHECK_GL_ERROR(glTexParameteri(src->mTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR));
OGRE_CHECK_GL_ERROR(glTexParameteri(src->mTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
}
else
{
// Manual mipmaps, stay safe with bilinear filtering so that no
// intermipmap leakage occurs.
OGRE_CHECK_GL_ERROR(glTexParameteri(src->mTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
OGRE_CHECK_GL_ERROR(glTexParameteri(src->mTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
}
}
// Clamp to edge (fastest)
OGRE_CHECK_GL_ERROR(glTexParameteri(src->mTarget, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
OGRE_CHECK_GL_ERROR(glTexParameteri(src->mTarget, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
#if OGRE_NO_GLES3_SUPPORT == 0
OGRE_CHECK_GL_ERROR(glTexParameteri(src->mTarget, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE));
// Set origin base level mipmap to make sure we source from the right mip
// level.
OGRE_CHECK_GL_ERROR(glTexParameteri(src->mTarget, GL_TEXTURE_BASE_LEVEL, src->mLevel));
#endif
// Store old binding so it can be restored later
GLint oldfb;
OGRE_CHECK_GL_ERROR(glGetIntegerv(GL_FRAMEBUFFER_BINDING, &oldfb));
// Set up temporary FBO
OGRE_CHECK_GL_ERROR(glBindFramebuffer(GL_FRAMEBUFFER, fboMan->getTemporaryFBO()));
GLuint tempTex = 0;
if(!fboMan->checkFormat(mFormat))
{
// If target format not directly supported, create intermediate texture
GLenum tempFormat = GLES2PixelUtil::getClosestGLInternalFormat(fboMan->getSupportedAlternative(mFormat));
OGRE_CHECK_GL_ERROR(glGenTextures(1, &tempTex));
OGRE_CHECK_GL_ERROR(glBindTexture(GL_TEXTURE_2D, tempTex));
#if GL_APPLE_texture_max_level && OGRE_PLATFORM != OGRE_PLATFORM_NACL
OGRE_CHECK_GL_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL_APPLE, 0));
#elif OGRE_NO_GLES3_SUPPORT == 0
OGRE_CHECK_GL_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0));
#endif
// Allocate temporary texture of the size of the destination area
OGRE_CHECK_GL_ERROR(glTexImage2D(GL_TEXTURE_2D, 0, tempFormat,
GLES2PixelUtil::optionalPO2(dstBox.getWidth()), GLES2PixelUtil::optionalPO2(dstBox.getHeight()),
0, GL_RGBA, GL_UNSIGNED_BYTE, 0));
OGRE_CHECK_GL_ERROR(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, tempTex, 0));
// Set viewport to size of destination slice
OGRE_CHECK_GL_ERROR(glViewport(0, 0, dstBox.getWidth(), dstBox.getHeight()));
}
else
{
// We are going to bind directly, so set viewport to size and position of destination slice
OGRE_CHECK_GL_ERROR(glViewport(dstBox.left, dstBox.top, dstBox.getWidth(), dstBox.getHeight()));
}
// Process each destination slice
for(size_t slice=dstBox.front; slice<dstBox.back; ++slice)
{
if(!tempTex)
{
// Bind directly
bindToFramebuffer(GL_COLOR_ATTACHMENT0, slice);
}
/// Calculate source texture coordinates
float u1 = (float)srcBox.left / (float)src->mWidth;
float v1 = (float)srcBox.top / (float)src->mHeight;
float u2 = (float)srcBox.right / (float)src->mWidth;
float v2 = (float)srcBox.bottom / (float)src->mHeight;
/// Calculate source slice for this destination slice
float w = (float)(slice - dstBox.front) / (float)dstBox.getDepth();
/// Get slice # in source
w = w * (float)srcBox.getDepth() + srcBox.front;
/// Normalise to texture coordinate in 0.0 .. 1.0
w = (w+0.5f) / (float)src->mDepth;
/// Finally we're ready to rumble
OGRE_CHECK_GL_ERROR(glBindTexture(src->mTarget, src->mTextureID));
OGRE_CHECK_GL_ERROR(glEnable(src->mTarget));
GLfloat squareVertices[] = {
-1.0f, -1.0f,
1.0f, -1.0f,
-1.0f, 1.0f,
1.0f, 1.0f,
};
GLfloat texCoords[] = {
u1, v1, w,
u2, v1, w,
u2, v2, w,
u1, v2, w
};
GLuint posAttrIndex = 0;
GLuint texAttrIndex = 0;
if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_SEPARATE_SHADER_OBJECTS))
{
GLSLESProgramPipeline* programPipeline = GLSLESProgramPipelineManager::getSingleton().getActiveProgramPipeline();
posAttrIndex = (GLuint)programPipeline->getAttributeIndex(VES_POSITION, 0);
texAttrIndex = (GLuint)programPipeline->getAttributeIndex(VES_TEXTURE_COORDINATES, 0);
}
else
{
GLSLESLinkProgram* linkProgram = GLSLESLinkProgramManager::getSingleton().getActiveLinkProgram();
posAttrIndex = (GLuint)linkProgram->getAttributeIndex(VES_POSITION, 0);
texAttrIndex = (GLuint)linkProgram->getAttributeIndex(VES_TEXTURE_COORDINATES, 0);
}
// Draw the textured quad
OGRE_CHECK_GL_ERROR(glVertexAttribPointer(posAttrIndex,
2,
GL_FLOAT,
0,
0,
squareVertices));
OGRE_CHECK_GL_ERROR(glEnableVertexAttribArray(posAttrIndex));
OGRE_CHECK_GL_ERROR(glVertexAttribPointer(texAttrIndex,
3,
GL_FLOAT,
0,
0,
texCoords));
OGRE_CHECK_GL_ERROR(glEnableVertexAttribArray(texAttrIndex));
OGRE_CHECK_GL_ERROR(glDrawArrays(GL_TRIANGLE_STRIP, 0, 4));
OGRE_CHECK_GL_ERROR(glDisable(src->mTarget));
if(tempTex)
{
// Copy temporary texture
OGRE_CHECK_GL_ERROR(glBindTexture(mTarget, mTextureID));
switch(mTarget)
{
case GL_TEXTURE_2D:
case GL_TEXTURE_CUBE_MAP:
OGRE_CHECK_GL_ERROR(glCopyTexSubImage2D(mFaceTarget, mLevel,
dstBox.left, dstBox.top,
0, 0, dstBox.getWidth(), dstBox.getHeight()));
break;
}
}
}
// Finish up
if(!tempTex)
{
// Generate mipmaps
if(mUsage & TU_AUTOMIPMAP)
{
OGRE_CHECK_GL_ERROR(glBindTexture(mTarget, mTextureID));
OGRE_CHECK_GL_ERROR(glGenerateMipmap(mTarget));
}
}
// Reset source texture to sane state
OGRE_CHECK_GL_ERROR(glBindTexture(src->mTarget, src->mTextureID));
#if OGRE_NO_GLES3_SUPPORT == 0
OGRE_CHECK_GL_ERROR(glTexParameteri(src->mTarget, GL_TEXTURE_BASE_LEVEL, 0));
// Detach texture from temporary framebuffer
if(mFormat == PF_DEPTH)
{
OGRE_CHECK_GL_ERROR(glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, 0));
}
else
#endif
{
OGRE_CHECK_GL_ERROR(glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER, 0));
}
// Restore old framebuffer
OGRE_CHECK_GL_ERROR(glBindFramebuffer(GL_FRAMEBUFFER, oldfb));
OGRE_CHECK_GL_ERROR(glDeleteTextures(1, &tempTex));
}
void CGrassDrawer::CreateFarTex()
{
//TODO create normalmap, too?
const int sizeMod = 2;
const int billboardSize = 256;
const int numAngles = 16;
const int texSizeX = billboardSize * numAngles;
const int texSizeY = billboardSize;
if (farTex == 0) {
glGenTextures(1, &farTex);
glBindTexture(GL_TEXTURE_2D, farTex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glSpringTexStorage2D(GL_TEXTURE_2D, -1, GL_RGBA8, texSizeX, texSizeY);
}
FBO fboTex;
fboTex.Bind();
fboTex.AttachTexture(farTex);
fboTex.CheckStatus("GRASSDRAWER1");
FBO fbo;
fbo.Bind();
fbo.CreateRenderBuffer(GL_DEPTH_ATTACHMENT_EXT, GL_DEPTH_COMPONENT16, texSizeX * sizeMod, texSizeY * sizeMod);
fbo.CreateRenderBuffer(GL_COLOR_ATTACHMENT0_EXT, GL_RGBA8, texSizeX * sizeMod, texSizeY * sizeMod);
fbo.CheckStatus("GRASSDRAWER2");
if (!fboTex.IsValid() || !fbo.IsValid()) {
grassOff = true;
return;
}
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glDisable(GL_FOG);
glDisable(GL_BLEND);
glDisable(GL_ALPHA_TEST);
glBindTexture(GL_TEXTURE_2D, grassBladeTex);
glEnable(GL_TEXTURE_2D);
glEnable(GL_CLIP_PLANE0);
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
glColor4f(1,1,1,1);
glViewport(0,0,texSizeX*sizeMod, texSizeY*sizeMod);
glClearColor(mapInfo->grass.color.r,mapInfo->grass.color.g,mapInfo->grass.color.b,0.f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glClearColor(0.f,0.f,0.f,0.f);
static const GLdouble eq[4] = {0.f, 1.f, 0.f, 0.f};
// render turf from different vertical angles
for (int a=0;a<numAngles;++a) {
glViewport(a*billboardSize*sizeMod, 0, billboardSize*sizeMod, billboardSize*sizeMod);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRotatef(a*90.f/(numAngles-1),1,0,0);
//glTranslatef(0,-0.5f,0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-partTurfSize, partTurfSize, partTurfSize, -partTurfSize, -turfSize, turfSize);
// has to be applied after the matrix transformations,
// cause it uses those an `compiles` them into the clip plane
glClipPlane(GL_CLIP_PLANE0, &eq[0]);
glCallList(grassDL);
}
glDisable(GL_CLIP_PLANE0);
// scale down the rendered fartextures (MSAA) and write to the final texture
glBindFramebufferEXT(GL_READ_FRAMEBUFFER, fbo.fboId);
glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER, fboTex.fboId);
glBlitFramebufferEXT(0, 0, texSizeX*sizeMod, texSizeY*sizeMod,
0, 0, texSizeX, texSizeY,
GL_COLOR_BUFFER_BIT, GL_LINEAR);
// compute mipmaps
glBindTexture(GL_TEXTURE_2D, farTex);
glGenerateMipmap(GL_TEXTURE_2D);
// blur non-rendered areas, so in mipmaps color data isn't blurred with background color
{
const int mipLevels = std::ceil(std::log((float)(std::max(texSizeX, texSizeY) + 1)));
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glEnable(GL_BLEND);
glBlendFuncSeparate(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA, GL_ZERO, GL_DST_ALPHA);
// copy each mipmap to its predecessor background
// -> fill background with blurred color data
fboTex.Bind();
for (int mipLevel = mipLevels - 2; mipLevel >= 0; --mipLevel) {
fboTex.AttachTexture(farTex, GL_TEXTURE_2D, GL_COLOR_ATTACHMENT0_EXT, mipLevel);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, mipLevel + 1.f);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, mipLevel + 1.f);
glViewport(0, 0, texSizeX>>mipLevel, texSizeY>>mipLevel);
CVertexArray* va = GetVertexArray();
va->Initialize();
va->AddVertexT(float3(-1.0f, 1.0f, 0.0f), 0.0f, 1.0f);
va->AddVertexT(float3( 1.0f, 1.0f, 0.0f), 1.0f, 1.0f);
va->AddVertexT(float3( 1.0f, -1.0f, 0.0f), 1.0f, 0.0f);
va->AddVertexT(float3(-1.0f, -1.0f, 0.0f), 0.0f, 0.0f);
va->DrawArrayT(GL_QUADS);
}
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// recreate mipmaps from now blurred base level
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, -1000.f);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, 1000.f);
glGenerateMipmap(GL_TEXTURE_2D);
}
glViewport(globalRendering->viewPosX, 0, globalRendering->viewSizeX, globalRendering->viewSizeY);
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
FBO::Unbind();
//glSaveTexture(farTex, "grassfar.png");
}
// The MAIN function, from here we start the application and run the game loop
int main()
{
// Init GLFW
glfwInit();
// Set all the required options for GLFW
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
// Create a GLFWwindow object that we can use for GLFW's functions
GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, "LearnOpenGL", nullptr, nullptr);
glfwMakeContextCurrent(window);
// Set the required callback functions
glfwSetKeyCallback(window, key_callback);
// Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
glewExperimental = GL_TRUE;
// Initialize GLEW to setup the OpenGL Function pointers
glewInit();
// Define the viewport dimensions
glViewport(0, 0, WIDTH, HEIGHT);
// Build and compile our shader program
Shader ourShader("transform.vs", "transform.frag");
// Set up vertex data (and buffer(s)) and attribute pointers
GLfloat vertices[] = {
// Positions // Colors // Texture Coords
0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, // Top Right
0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, // Bottom Right
-0.5f, -0.5f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, // Bottom Left
-0.5f, 0.5f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f // Top Left
};
GLuint indices[] = { // Note that we start from 0!
0, 1, 3, // First Triangle
1, 2, 3 // Second Triangle
};
GLuint VBO, VAO, EBO;
glGenVertexArrays(1, &VAO);
glGenBuffers(1, &VBO);
glGenBuffers(1, &EBO);
glBindVertexArray(VAO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
// Position attribute
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
// Color attribute
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(1);
// TexCoord attribute
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(6 * sizeof(GLfloat)));
glEnableVertexAttribArray(2);
glBindVertexArray(0); // Unbind VAO
// Load and create a texture
GLuint texture1;
GLuint texture2;
// ====================
// Texture 1
// ====================
glGenTextures(1, &texture1);
glBindTexture(GL_TEXTURE_2D, texture1); // All upcoming GL_TEXTURE_2D operations now have effect on our texture object
// Set our texture parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); // Set texture wrapping to GL_REPEAT
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// Set texture filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Load, create texture and generate mipmaps
int width, height;
unsigned char* image = SOIL_load_image("../../../resources/textures/container.jpg", &width, &height, 0, SOIL_LOAD_RGB);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
SOIL_free_image_data(image);
glBindTexture(GL_TEXTURE_2D, 0); // Unbind texture when done, so we won't accidentily mess up our texture.
// ===================
// Texture 2
// ===================
glGenTextures(1, &texture2);
glBindTexture(GL_TEXTURE_2D, texture2);
// Set our texture parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// Set texture filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Load, create texture and generate mipmaps
image = SOIL_load_image("../../../resources/textures/awesomeface.png", &width, &height, 0, SOIL_LOAD_RGB);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
SOIL_free_image_data(image);
glBindTexture(GL_TEXTURE_2D, 0);
// Game loop
while (!glfwWindowShouldClose(window))
{
// Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
glfwPollEvents();
// Render
// Clear the colorbuffer
glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
// Bind Textures using texture units
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture1);
glUniform1i(glGetUniformLocation(ourShader.Program, "ourTexture1"), 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, texture2);
glUniform1i(glGetUniformLocation(ourShader.Program, "ourTexture2"), 1);
// Activate shader
ourShader.Use();
// Create transformations
glm::mat4 transform;
transform = glm::translate(transform, glm::vec3(0.5f, -0.5f, 0.0f));
transform = glm::rotate(transform, (GLfloat)glfwGetTime() * 50.0f, glm::vec3(0.0f, 0.0f, 1.0f));
// Get matrix's uniform location and set matrix
GLint transformLoc = glGetUniformLocation(ourShader.Program, "transform");
glUniformMatrix4fv(transformLoc, 1, GL_FALSE, glm::value_ptr(transform));
// Draw container
glBindVertexArray(VAO);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
glBindVertexArray(0);
// Swap the screen buffers
glfwSwapBuffers(window);
}
// Properly de-allocate all resources once they've outlived their purpose
glDeleteVertexArrays(1, &VAO);
glDeleteBuffers(1, &VBO);
glDeleteBuffers(1, &EBO);
// Terminate GLFW, clearing any resources allocated by GLFW.
glfwTerminate();
return 0;
}
bool Texture :: loadCubemap ( const char * f1, const char * f2, const char * f3, const char * f4, const char * f5, const char * f6 )
{
TexImage * image [6];
image [0] = loadTexImage ( f1 );
image [1] = loadTexImage ( f2 );
image [2] = loadTexImage ( f3 );
image [3] = loadTexImage ( f4 );
image [4] = loadTexImage ( f5 );
image [5] = loadTexImage ( f6 );
for ( int i = 0; i < 6; i++ )
if ( image [i] == NULL || image [i] -> getImageType () != TexImage :: image2D || image [i] -> getWidth () != image [i] -> getHeight () )
{
for ( int j = 0; j < 6; j++ )
delete image [j];
return false;
}
for ( int i = 1; i < 6; i++ )
if ( image [i] -> getWidth () != image [0] -> getWidth () || image [i] -> getFormat () != image [0] -> getFormat () )
{
for ( int j = 0; j < 6; j++ )
delete image [j];
return false;
}
setParamsFromTexImage ( image [0], GL_TEXTURE_CUBE_MAP );
glGenTextures ( 1, &id );
glBindTexture ( target, id );
glPixelStorei ( GL_UNPACK_ALIGNMENT, 1 ); // set 1-byte alignment
glTexParameteri ( target, GL_TEXTURE_WRAP_S, GL_REPEAT ); // set default params for texture
glTexParameteri ( target, GL_TEXTURE_WRAP_T, GL_REPEAT );
if ( !image [0] -> isCompressed () ) // not compressed image
{
for ( int i = 0; i < 6; i++ )
glTexImage2D ( GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + i, 0, getFormat ().getInternalFormat (), width, height, 0,
getFormat ().getFormat (), image [i] -> getGlType (), image [i] -> imageData () );
if ( autoMipmaps )
glGenerateMipmap ( target );
}
else
{
int mipmaps = image [0] -> getNumLevels ();
// glTexParameteri ( target, GL_TEXTURE_MAX_LEVEL, mipmaps - 1 );
for ( int i = 0; i < 6; i++ )
{
int w = width;
int h = height;
byte * ptr = image [i] -> imageData ( i, 0 );
for ( int j = 0; j < mipmaps; j++ )
{
int size = image [i] -> imageDataSize ( 0, j );
glCompressedTexImage2D ( GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + i, j, getFormat ().getInternalFormat (), w, h, 0, size, ptr );
if ( ( w = w / 2 ) < 1 )
w = 1;
if ( ( h = h / 2 ) < 1 )
h = 1;
ptr += size;
}
}
}
if ( autoMipmaps )
{
glTexParameteri ( target, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR );
glTexParameteri ( target, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
}
else
{
glTexParameteri ( target, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexParameteri ( target, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
}
glBindTexture ( target, 0 );
for ( int j = 0; j < 6; j++ )
delete image [j];
return true;
}
