void init(void)
{
glClearColor(0.3, 0.3, 0.3, 1);
glGenVertexArrays(1, &vao_quad);
glBindVertexArray(vao_quad);
#define N 30
GLfloat vertices[4][4] = {
{ -0.90, -0.90, 0, N },
{ 0.90, -0.90, N, N },
{ -0.90, 0.90, 0, 0 },
{ 0.90, 0.90, N, 0 },
};
glGenBuffers(1, &buf_quad);
glBindBuffer(GL_ARRAY_BUFFER, buf_quad);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
GLuint h_prog = build_program_from_files("quad_tex_mipmap.vert", "quad_tex_mipmap.frag");
glUseProgram(h_prog);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat)*4, BUFFER_OFFSET(0));
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat)*4, BUFFER_OFFSET(sizeof(GLfloat)*2));
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glm::mat4 M = glm::rotate(glm::mat4(1.0f), -85.0f, glm::vec3(1.0f, 0.0f, 0.0f));
glm::mat4 V = glm::translate(glm::mat4(1.0f), glm::vec3(0.0f, 0.0f, -1.0f));
glm::mat4 P = glm::perspective(45.0f, 1.0f, 0.1f, 5.0f);
glUniformMatrix4fv(glGetUniformLocation(h_prog, "MVP"), 1, GL_FALSE, glm::value_ptr(P*V*M));
glUniform4f(glGetUniformLocation(h_prog, "color"), 1, 1, .5, .5);
glUniform1i(glGetUniformLocation(h_prog, "tex"), 4);
glEnable(GL_CULL_FACE);
load_textures();
glGenSamplers(1, &sampler);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_REPEAT);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_REPEAT);
// glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
// glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
// glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
// glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR);
glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glBindSampler(3, sampler);
glBindSampler(4, sampler);
}
PIGLIT_GL_TEST_CONFIG_END
enum piglit_result
piglit_display(void)
{
bool pass = true;
GLuint tex, sampler, fb;
const float tex_data[16] = {0, 1, 0, 0,
1, 0, 0, 0,
1, 0, 0, 0,
1, 0, 0, 0};
const float *green = tex_data;
glClearColor(0, 0, 1, 0);
glClear(GL_COLOR_BUFFER_BIT);
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 2, 2, 0,
GL_RGBA, GL_FLOAT, tex_data);
glGenFramebuffers(1, &fb);
glBindFramebuffer(GL_FRAMEBUFFER, fb);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D,
tex,
0);
assert(glGetError() == 0);
glGenSamplers(1, &sampler);
glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindSampler(0, sampler);
glBindFramebuffer(GL_READ_FRAMEBUFFER, fb);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
glBlitFramebuffer(0, 0, 1, 1,
0, 0, piglit_width, piglit_height,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
glBindFramebuffer(GL_FRAMEBUFFER, piglit_winsys_fbo);
pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height, green);
piglit_present_results();
glDeleteSamplers(1, &sampler);
glDeleteTextures(1, &tex);
glDeleteFramebuffers(1, &fb);
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
static cg_sampler_cache_entry_t *
_cg_sampler_cache_get_entry_gl(cg_sampler_cache_t *cache,
const cg_sampler_cache_entry_t *key)
{
cg_sampler_cache_entry_t *entry;
entry = c_hash_table_lookup(cache->hash_table_gl, key);
if (entry == NULL) {
cg_device_t *dev = cache->dev;
entry = c_slice_dup(cg_sampler_cache_entry_t, key);
if (_cg_has_private_feature(dev,
CG_PRIVATE_FEATURE_SAMPLER_OBJECTS)) {
GE(dev, glGenSamplers(1, &entry->sampler_object));
GE(dev,
glSamplerParameteri(entry->sampler_object,
GL_TEXTURE_MIN_FILTER,
entry->min_filter));
GE(dev,
glSamplerParameteri(entry->sampler_object,
GL_TEXTURE_MAG_FILTER,
entry->mag_filter));
set_wrap_mode(dev,
entry->sampler_object,
GL_TEXTURE_WRAP_S,
entry->wrap_mode_s);
set_wrap_mode(dev,
entry->sampler_object,
GL_TEXTURE_WRAP_T,
entry->wrap_mode_t);
set_wrap_mode(dev,
entry->sampler_object,
GL_TEXTURE_WRAP_R,
entry->wrap_mode_p);
} else {
/* If sampler objects aren't supported then we'll invent a
unique number so that pipelines can still compare the
unique state just by comparing the sampler object
numbers */
entry->sampler_object = cache->next_fake_sampler_object_number++;
}
c_hash_table_insert(cache->hash_table_gl, entry, entry);
}
return entry;
}
void Mesh::loadTexture(const std::string &path)
{
if(glIsTexture(m_meshTexture) == GL_FALSE)
glGenTextures(1, &m_meshTexture);
if(glIsSampler(m_meshSampler) == GL_FALSE)
glGenSamplers(1, &m_meshSampler);
// Setup sampler data
glSamplerParameteri(m_meshSampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glSamplerParameteri(m_meshSampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glSamplerParameteri(m_meshSampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(m_meshSampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
SDL_Surface* surface = IMG_Load(path.c_str());
GLint readFormat = GL_RGB;
if(surface->format->BytesPerPixel == 4)
{
if(surface->format->Rmask == 0xFF)
readFormat = GL_RGBA;
else if(surface->format->Bmask == 0xFF)
readFormat = GL_BGRA;
}
else if(surface->format->BytesPerPixel == 3)
{
if(surface->format->Rmask == 0xFF)
readFormat = GL_RGB;
else if(surface->format->Bmask == 0xFF)
readFormat = GL_BGR;
}
if(surface->format->Rmask)
GLfloat texDat[] =
{
1.f,1.f,1.f,1.f,
0.f,1.f, 0.f, 1.f,
1.f,1.f,1.f,1.f,
0.f,1.f, 0.f, 1.f,
};
// Setup texture data
glBindTexture(GL_TEXTURE_2D, m_meshTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, surface->w, surface->h, 0, readFormat, GL_UNSIGNED_BYTE, surface->pixels);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
glBindTexture(GL_TEXTURE_2D, 0);
SDL_FreeSurface(surface);
}
void OGLWindow::InitOGLState()
{
VSync(true);
glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
//Initialise OGL shader
m_shader = new OGLShaderProgram();
m_skyBoxShader = new OGLShaderProgram();
m_shader->CreateShaderProgram();
m_shader->AttachAndCompileShaderFromFile(L"../asset/shader/glsl/basic.vert", SHADER_VERTEX);
m_shader->AttachAndCompileShaderFromFile(L"../asset/shader/glsl/basic.frag", SHADER_FRAGMENT);
m_shader->BindAttributeLocation( 0, "position" );
m_shader->BindAttributeLocation( 1, "inNormal" );
m_shader->BindAttributeLocation( 2, "inUV" );
//shading skybox via shaders
m_skyBoxShader->CreateShaderProgram();
m_skyBoxShader->AttachAndCompileShaderFromFile(L"../asset/shader/glsl/skybox.vert", SHADER_VERTEX);
m_skyBoxShader->AttachAndCompileShaderFromFile(L"../asset/shader/glsl/skybox.frag", SHADER_FRAGMENT);
m_skyBoxShader->BindAttributeLocation(0, "position");
m_skyBoxShader->BindAttributeLocation(1, "inNormal");
m_skyBoxShader->BindAttributeLocation(2, "inUV");
glBindFragDataLocation( m_shader->GetProgramHandle(), 0, "outFrag" );
glBindFragDataLocation(m_skyBoxShader->GetProgramHandle(), 0, "outFrag");
m_shader->BuildShaderProgram();
m_shader->ActivateShaderProgram();
m_skyBoxShader->BuildShaderProgram();
m_shader->ActivateShaderProgram();
glUniform1i( m_uniform_texture, 0 );
//Create a texture sampler
glGenSamplers( 1, (GLuint*)(&m_texDefaultSampler) );
glSamplerParameteri(m_texDefaultSampler , GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(m_texDefaultSampler , GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glSamplerParameteri(m_texDefaultSampler , GL_TEXTURE_MIN_FILTER , GL_LINEAR);
glSamplerParameteri(m_texDefaultSampler , GL_TEXTURE_MAG_FILTER , GL_LINEAR);
}
void OGL4Sampler::SetCompareFunction(TEXTURE_COMPARE_FUNC value)
{
switch(value)
{
case CF_LEQUAL:
glSamplerParameteri(m_sampler, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
break;
case CF_GEQUAL:
glSamplerParameteri(m_sampler, GL_TEXTURE_COMPARE_FUNC, GL_GEQUAL);
break;
case CF_LESS:
glSamplerParameteri(m_sampler, GL_TEXTURE_COMPARE_FUNC, GL_LESS);
break;
case CF_GREATER:
glSamplerParameteri(m_sampler, GL_TEXTURE_COMPARE_FUNC, GL_GREATER);
break;
case CF_EQUAL:
glSamplerParameteri(m_sampler, GL_TEXTURE_COMPARE_FUNC, GL_EQUAL);
break;
case CF_NOTEQUAL:
glSamplerParameteri(m_sampler, GL_TEXTURE_COMPARE_FUNC, GL_NOTEQUAL);
break;
case CF_ALWAYS:
glSamplerParameteri(m_sampler, GL_TEXTURE_COMPARE_FUNC, GL_ALWAYS);
break;
case CF_NEVER:
glSamplerParameteri(m_sampler, GL_TEXTURE_COMPARE_FUNC, GL_NEVER);
break;
default:
assert(0);
break;
}
}
static void exec(std::vector<unsigned> &v, std::vector<GLenum> &e)
{
unsigned id;
glGenSamplers(1, &id);
glSamplerParameteri(id, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glSamplerParameteri(id, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glSamplerParameteri(id, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(id, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glSamplerParameterf(id, GL_TEXTURE_MAX_ANISOTROPY_EXT, 1.);
v.push_back(createNearestSampler());
e.push_back(GL_TEXTURE_2D);
CreateSamplers<tp...>::exec(v, e);
}
void Renderer::loadTextures()
{
{
QVector<QString> files;
files << "dirt.png" << "sand.png" << "grass.png" << "mountain.png";
QVector<QImage> images(files.count(), QImage(QSize(700,700), QImage::Format_RGBA8888));
for (int i=0; i<images.count(); i++)
{
QImage &image = images[i];
if (!image.load(gDefaultPathTextures + files[i]))
qDebug() << "Error loading texture " << gDefaultPathTextures + files[i];
}
int imageSize = images.first().width(); //for now, assume all images are the same width and height
glGenTextures(1, &mTextures.terrain);
qDebug() << "I am " << mTextures.terrain;
glBindTexture(GL_TEXTURE_2D_ARRAY, mTextures.terrain);
GLenum format = GL_BGRA;
int mipLevels = 8;
glTexStorage3D(GL_TEXTURE_2D_ARRAY, mipLevels, GL_RGBA8, imageSize, imageSize, 4);
glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0,
0, 0, 0,
imageSize, imageSize, 1,
format, GL_UNSIGNED_BYTE, images[0].bits());
glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0,
0, 0, 1,
imageSize, imageSize, 1,
format, GL_UNSIGNED_BYTE, images[1].bits());
glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0,
0, 0, 2,
imageSize, imageSize, 1,
format, GL_UNSIGNED_BYTE, images[2].bits());
glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0,
0, 0, 3,
imageSize, imageSize, 1,
format, GL_UNSIGNED_BYTE, images[3].bits());
glGenerateMipmap(GL_TEXTURE_2D_ARRAY);
glSamplerParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glSamplerParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR);
}
}
GLuint CreateSampler(GLenum min_filter, GLenum mag_filter, GLenum u_wrap, GLenum v_wrap)
{
GLuint sampler_id;
glGenSamplers(1, &sampler_id);
if (NULL == sampler_id) {
return NULL;
}
glSamplerParameteri(sampler_id, GL_TEXTURE_MIN_FILTER, min_filter); // Default: GL_NEAREST_MIPMAP_LINEAR
glSamplerParameteri(sampler_id, GL_TEXTURE_MAG_FILTER, mag_filter); // Default: GL_LINEAR
glSamplerParameteri(sampler_id, GL_TEXTURE_WRAP_S, u_wrap); // Default: GL_REPEAT
glSamplerParameteri(sampler_id, GL_TEXTURE_WRAP_T, v_wrap); // Default: GL_REPEAT
m_samplerID = sampler_id;
return sampler_id;
}
GLTextureSamplerObject::GLTextureSamplerObject( const DTextureSampler& state )
{
glGenSamplers(1, &mGLSampObj);
mState = state;
GLenum addrModeU = GLTranslator::getGLTextureAddressMode(state.addressU);
GLenum addrModeV = GLTranslator::getGLTextureAddressMode(state.addressV);
GLenum addrModeW = GLTranslator::getGLTextureAddressMode(state.addressW);
glSamplerParameteri(mGLSampObj, GL_TEXTURE_WRAP_S, addrModeU);
glSamplerParameteri(mGLSampObj, GL_TEXTURE_WRAP_T, addrModeV);
glSamplerParameteri(mGLSampObj, GL_TEXTURE_WRAP_R, addrModeW);
GLenum minFilter;
GLenum magFilter;
float maxAnisotropy = 1.0f;
if (state.minFilter == FO_Anistropic || state.magFilter == FO_Anistropic || state.mipFilter == FO_Anistropic)
{
magFilter = GL_LINEAR;
minFilter = GL_LINEAR_MIPMAP_LINEAR;
}
else
{
if (state.mipFilter != FO_None)
{
if (state.mipFilter == FO_Linear)
{
minFilter = (state.minFilter == FO_Linear) ? GL_LINEAR_MIPMAP_LINEAR : GL_NEAREST_MIPMAP_LINEAR;
}
else
{
minFilter = (state.minFilter == FO_Linear) ? GL_LINEAR_MIPMAP_NEAREST : GL_NEAREST_MIPMAP_NEAREST;
}
magFilter = (state.magFilter == FO_Linear) ? GL_LINEAR : GL_NEAREST;
}
else
{
minFilter = (state.minFilter == FO_Linear) ? GL_LINEAR : GL_NEAREST;
magFilter = (state.magFilter == FO_Linear) ? GL_LINEAR : GL_NEAREST;
}
}
glSamplerParameteri(mGLSampObj, GL_TEXTURE_MIN_FILTER, minFilter);
glSamplerParameteri(mGLSampObj, GL_TEXTURE_MAG_FILTER, magFilter);
glSamplerParameterf(mGLSampObj, GL_TEXTURE_MAX_ANISOTROPY_EXT, maxAnisotropy);
glSamplerParameterf(mGLSampObj, GL_TEXTURE_MIN_LOD, state.minLod);
glSamplerParameterf(mGLSampObj, GL_TEXTURE_MAX_LOD, state.maxLod);
if (state.samplerComparison != CF_AlwaysFail)
{
glSamplerParameteri(mGLSampObj, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
}
else
{
glSamplerParameteri(mGLSampObj, GL_TEXTURE_COMPARE_MODE, GL_NONE);
}
glSamplerParameteri(mGLSampObj, GL_TEXTURE_COMPARE_FUNC, GLTranslator::getGLCompareFunction(state.samplerComparison));
glSamplerParameterf(mGLSampObj, GL_TEXTURE_LOD_BIAS, state.mipLodBias);
}
void display()
{
glm::mat4 ViewTranslate = glm::translate(glm::mat4(1.0f), glm::vec3(0.0f, 0.0f, -Window.TranlationCurrent.y));
glm::mat4 ViewRotateX = glm::rotate(ViewTranslate, Window.RotationCurrent.y, glm::vec3(1.f, 0.f, 0.f));
glm::mat4 View = glm::rotate(ViewRotateX, Window.RotationCurrent.x, glm::vec3(0.f, 1.f, 0.f));
glm::mat4 Model = glm::mat4(1.0f);
glEnable(GL_SCISSOR_TEST);
glDisable(GL_FRAMEBUFFER_SRGB);
glScissorIndexed(0, 0, 0, Window.Size.x, Window.Size.y);
glClearBufferfv(GL_COLOR, 0, &glm::vec4(1.0f, 0.5f, 0.0f, 1.0f)[0]);
{
glm::mat4 Projection = glm::perspective(45.0f, float(FRAMEBUFFER_SIZE.x) / float(FRAMEBUFFER_SIZE.y), 0.1f, 100.0f);
glm::mat4 MVP = Projection * View * Model;
glViewportIndexedf(0, 0, 0, float(FRAMEBUFFER_SIZE.x), float(FRAMEBUFFER_SIZE.y));
glDisable(GL_FRAMEBUFFER_SRGB);
glBindFramebuffer(GL_FRAMEBUFFER, FramebufferName);
glClearBufferfv(GL_COLOR, 0, &glm::vec4(0.0f, 0.0f, 0.0f, 1.0f)[0]);
renderScene(glm::vec4(0.0f, 0.0f, 0.0f, 1.0f), MVP, Texture2DName);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
{
glm::mat4 Projection = glm::perspective(45.0f, float(Window.Size.x) / float(Window.Size.y), 0.1f, 100.0f);
glm::mat4 MVP = Projection * View * Model;
glViewportIndexedfv(0, &glm::vec4(0, 0, Window.Size.x, Window.Size.y)[0]);
// Correct display
glScissorIndexed(0, 0, Window.Size.y / 2 - 1, Window.Size.x, Window.Size.y / 2);
glEnable(GL_FRAMEBUFFER_SRGB);
glSamplerParameteri(SamplerName, GL_TEXTURE_SRGB_DECODE_EXT, GL_SKIP_DECODE_EXT); // GL_DECODE_EXT
renderScene(glm::vec4(1.0f, 0.5f, 0.0f, 1.0f), MVP, ColorbufferName);
glDisable(GL_FRAMEBUFFER_SRGB);
// Incorrected display
glScissorIndexed(0, 0, 0, Window.Size.x, Window.Size.y / 2);
glEnable(GL_FRAMEBUFFER_SRGB);
glSamplerParameteri(SamplerName, GL_TEXTURE_SRGB_DECODE_EXT, GL_DECODE_EXT); // GL_DECODE_EXT
renderScene(glm::vec4(1.0f, 0.5f, 0.0f, 1.0f), MVP, ColorbufferName);
glDisable(GL_FRAMEBUFFER_SRGB);
}
glf::swapBuffers();
glf::checkError("display");
}
//-----------------------------------------------------------------------------------
int Renderer::CreateSampler(GLenum min_filter, //fragment counts for more than one texel, how does it shrink?
GLenum magFilter, //more texels than fragments, how does it stretch?
GLenum uWrap, //If u is < 0 or > 1, how does it behave?
GLenum vWrap) //Same, but for v
{
GLuint id;
glGenSamplers(1, &id);
glSamplerParameteri(id, GL_TEXTURE_MIN_FILTER, min_filter);
glSamplerParameteri(id, GL_TEXTURE_MAG_FILTER, magFilter);
glSamplerParameteri(id, GL_TEXTURE_WRAP_S, uWrap); //For some reason, OpenGL refers to UV's as ST's
glSamplerParameteri(id, GL_TEXTURE_WRAP_T, vWrap);
return id;
}
void OGL4Sampler::SetCompareMode(TEXTURE_COMPARE_MODE value)
{
switch(value)
{
case TCM_REF:
glSamplerParameteri(m_sampler, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
break;
case TCM_NONE:
glSamplerParameteri(m_sampler, GL_TEXTURE_COMPARE_MODE, GL_NONE);
break;
default:
assert(0);
return;
}
}
Stats::Stats(int viewport_width, int viewport_height)
: texture_atlas(0)
, texture_font(0)
, vertex_count(0)
, position_vbo(0)
, texcoord_vbo(0)
, vao(0)
, sampler(0)
, text_vs(0)
, text_fs(0)
, text_program(0)
, uniform_instance_buffer(0)
{
texture_atlas = texture_atlas_new(512, 512, 1);
texture_font = texture_font_new_from_file(texture_atlas, 11, (DIRECTORY_FONTS + FILE_DEFAULT_FONT).c_str());
texture_font_load_glyphs(texture_font, FONT_CHARSET_CACHE);
// Create a sampler object for the font.
glGenSamplers(1, &sampler);
glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// Load the shader program.
text_vs = compile_shader_from_file(DIRECTORY_SHADERS + FILE_TEXT_VS, GL_VERTEX_SHADER);
text_fs = compile_shader_from_file(DIRECTORY_SHADERS + FILE_TEXT_FS, GL_FRAGMENT_SHADER);
text_program = glCreateProgram();
glAttachShader(text_program, text_vs);
glAttachShader(text_program, text_fs);
link_program(text_program);
// Setup a scale matrix to go from screen space to normalized device space.
glm::mat3 scale(2.0f / viewport_width, 0.0f, 0.0f,
0.0f, 2.0f / viewport_height, 0.0f,
0.0f, 0.0f, 1.0f);
glm::mat3 translation(1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
MARGIN_X, MARGIN_Y, 1.0f);
uniform_instance_data.model_matrix = glm::mat3x4(translation * scale);
uniform_instance_data.color = glm::vec4(1.0f, 1.0f, 0.0f, 1.0f);
glGenBuffers(1, &uniform_instance_buffer);
glBindBufferBase(GL_UNIFORM_BUFFER, UNIFORM_INSTANCE_BINDING, uniform_instance_buffer);
glBufferData(GL_UNIFORM_BUFFER, sizeof(TextPerInstance), &uniform_instance_data, GL_DYNAMIC_DRAW);
}
static void
set_wrap_mode(cg_device_t *dev,
GLuint sampler_object,
GLenum param,
cg_sampler_cache_wrap_mode_t wrap_mode)
{
GE(dev, glSamplerParameteri(sampler_object, param, wrap_mode));
}
bool initSampler()
{
glGenSamplers(1, &SamplerName);
glSamplerParameteri(SamplerName, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glSamplerParameteri(SamplerName, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
//glSamplerParameteri(SamplerName, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
//glSamplerParameteri(SamplerName, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
//glSamplerParameteri(SamplerName, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glSamplerParameterfv(SamplerName, GL_TEXTURE_BORDER_COLOR, &glm::vec4(0.0f)[0]);
glSamplerParameterf(SamplerName, GL_TEXTURE_MIN_LOD, -1000.f);
glSamplerParameterf(SamplerName, GL_TEXTURE_MAX_LOD, 1000.f);
glSamplerParameterf(SamplerName, GL_TEXTURE_LOD_BIAS, 0.0f);
glSamplerParameteri(SamplerName, GL_TEXTURE_COMPARE_MODE, GL_NONE);
glSamplerParameteri(SamplerName, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
return this->checkError("initSampler");
}
void Clouds::samplerInit()
{
// sampler
glGenSamplers(1, &linearSampler_noMipMaps);
glSamplerParameteri(linearSampler_noMipMaps, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glSamplerParameteri(linearSampler_noMipMaps, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glSamplerParameteri(linearSampler_noMipMaps, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(linearSampler_noMipMaps, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glSamplerParameteri(linearSampler_noMipMaps, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glGenSamplers(1, &linearSampler_MipMaps);
glSamplerParameteri(linearSampler_MipMaps, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glSamplerParameteri(linearSampler_MipMaps, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glSamplerParameteri(linearSampler_MipMaps, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(linearSampler_MipMaps, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glSamplerParameteri(linearSampler_MipMaps, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
}
OpenGLSamplerState::OpenGLSamplerState( const SamplerStateDesc& desc )
: SamplerState(desc),
mSamplerOGL(0)
{
glGenSamplers(1, &mSamplerOGL);
glSamplerParameteri(mSamplerOGL, GL_TEXTURE_WRAP_S, OpenGLMapping::Mapping(desc.AddressU));
glSamplerParameteri(mSamplerOGL, GL_TEXTURE_WRAP_T, OpenGLMapping::Mapping(desc.AddressV));
glSamplerParameteri(mSamplerOGL, GL_TEXTURE_WRAP_R, OpenGLMapping::Mapping(desc.AddressW));
GLenum min, mag;
OpenGLMapping::Mapping( min, mag, desc.Filter );
glSamplerParameteri(mSamplerOGL, GL_TEXTURE_MAG_FILTER, mag);
glSamplerParameteri(mSamplerOGL, GL_TEXTURE_MIN_FILTER, min);
glSamplerParameterf(mSamplerOGL, GL_TEXTURE_MAX_ANISOTROPY_EXT, desc.MaxAnisotropy);
glSamplerParameterf(mSamplerOGL, GL_TEXTURE_MIN_LOD, desc.MinLOD);
glSamplerParameterf(mSamplerOGL, GL_TEXTURE_MAX_LOD, desc.MaxLOD);
glSamplerParameterf(mSamplerOGL, GL_TEXTURE_LOD_BIAS , desc.MipLODBias);
glSamplerParameterfv(mSamplerOGL, GL_TEXTURE_BORDER_COLOR, desc.BorderColor());
if (desc.CompareSampler)
{
// Use GL_COMPARE_REF_TO_TEXTURE
glSamplerParameteri(mSamplerOGL, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
glSamplerParameteri(mSamplerOGL, GL_TEXTURE_COMPARE_FUNC, OpenGLMapping::Mapping(desc.ComparisonFunc));
}
OGL_ERROR_CHECK();
}
void TextureData::SetFiltering(dword p_iMag,dword p_iMin) {
switch(p_iMag) {
case MAG_NEAREST:
glSamplerParameteri(m_iSampler,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
break;
case MAG_BILINEAR:
glSamplerParameteri(m_iSampler,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
break;
};
switch(p_iMin) {
case MIN_NEAREST:
glSamplerParameteri(m_iSampler,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
break;
case MIN_BILINEAR:
glSamplerParameteri(m_iSampler,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
break;
case MIN_NEAREST_MIPMAP:
glSamplerParameteri(m_iSampler,GL_TEXTURE_MIN_FILTER,GL_NEAREST_MIPMAP_NEAREST);
break;
case MIN_BILINEAR_MIPMAP:
glSamplerParameteri(m_iSampler,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
break;
case MIN_TRILINEAR:
glSamplerParameteri(m_iSampler,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR);
break;
};
m_iMagFilter=p_iMag;
m_iMinFilter=p_iMin;
};
void GL::Sampler::setSamplingState(TextureTarget target, const SamplingState& state) {
if (state.isParameterSet(SamplingState::Parameter::WrapS))
glSamplerParameteri(GLenum(target), GL_TEXTURE_WRAP_S, GLint(state.wrap.s));
if (state.isParameterSet(SamplingState::Parameter::WrapT))
glSamplerParameteri(GLenum(target), GL_TEXTURE_WRAP_T, GLint(state.wrap.t));
if (state.isParameterSet(SamplingState::Parameter::WrapR))
glSamplerParameteri(GLenum(target), GL_TEXTURE_WRAP_R, GLint(state.wrap.r));
if (state.isParameterSet(SamplingState::Parameter::MinFilter))
glSamplerParameteri(GLenum(target), GL_TEXTURE_MIN_FILTER, GLint(state.filter.min));
if (state.isParameterSet(SamplingState::Parameter::MagFilter))
glSamplerParameteri(GLenum(target), GL_TEXTURE_MAG_FILTER, GLint(state.filter.mag));
if (state.isParameterSet(SamplingState::Parameter::BorderColor))
glSamplerParameterfv(GLenum(target), GL_TEXTURE_BORDER_COLOR, &(state.borderColor.r));
if (state.isParameterSet(SamplingState::Parameter::MinLOD))
glSamplerParameterf(GLenum(target), GL_TEXTURE_MIN_LOD, state.LOD.min);
if (state.isParameterSet(SamplingState::Parameter::MaxLOD))
glSamplerParameterf(GLenum(target), GL_TEXTURE_MAX_LOD, state.LOD.max);
if (state.isParameterSet(SamplingState::Parameter::LODbias))
glSamplerParameterf(GLenum(target), GL_TEXTURE_LOD_BIAS, state.LOD.bias);
if (state.isParameterSet(SamplingState::Parameter::CompareMode))
glSamplerParameteri(GLenum(target), GL_TEXTURE_COMPARE_MODE, GLint(state.compare.mode));
if (state.isParameterSet(SamplingState::Parameter::CompareFunc))
glSamplerParameteri(GLenum(target), GL_TEXTURE_COMPARE_FUNC, GLint(state.compare.func));
}
GLuint glCreateSamplerGTC(GLenum mag, GLenum min, GLenum mip, GLenum wrap, GLfloat borderColor[4], GLenum compare)
{
assert(mag == GL_LINEAR || mag == GL_NEAREST);
assert(min == GL_LINEAR || min == GL_NEAREST);
assert(mip == GL_LINEAR || mip == GL_NEAREST);
GLuint sampler = 0;
glCreateSamplers(1, &sampler);
GLint minFilter = GL_NONE;
if (min == GL_LINEAR)
minFilter = mip == GL_LINEAR ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR_MIPMAP_NEAREST;
else
minFilter = mip == GL_LINEAR ? GL_NEAREST_MIPMAP_LINEAR : GL_NEAREST_MIPMAP_NEAREST;
glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, minFilter);
glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, mag);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_S, wrap);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_T, wrap);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_R, wrap);
glSamplerParameterfv(sampler, GL_TEXTURE_BORDER_COLOR, borderColor);
glSamplerParameteri(sampler, GL_TEXTURE_COMPARE_MODE, compare == GL_NONE ? GL_NONE : GL_COMPARE_R_TO_TEXTURE);
glSamplerParameteri(sampler, GL_TEXTURE_COMPARE_FUNC, compare != GL_NONE ? compare : GL_LEQUAL);
return sampler;
}
void CTexture::SetFiltering(int a_tfMagnification, int a_tfMinification)
{
glBindSampler(0, uiSampler);
// Set magnification filter
if(a_tfMagnification == TEXTURE_FILTER_MAG_NEAREST)
glSamplerParameteri(uiSampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
else if(a_tfMagnification == TEXTURE_FILTER_MAG_BILINEAR)
glSamplerParameteri(uiSampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Set minification filter
if(a_tfMinification == TEXTURE_FILTER_MIN_NEAREST)
glSamplerParameteri(uiSampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
else if(a_tfMinification == TEXTURE_FILTER_MIN_BILINEAR)
glSamplerParameteri(uiSampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
else if(a_tfMinification == TEXTURE_FILTER_MIN_NEAREST_MIPMAP)
glSamplerParameteri(uiSampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
else if(a_tfMinification == TEXTURE_FILTER_MIN_BILINEAR_MIPMAP)
glSamplerParameteri(uiSampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
else if(a_tfMinification == TEXTURE_FILTER_MIN_TRILINEAR)
glSamplerParameteri(uiSampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
tfMinification = a_tfMinification;
tfMagnification = a_tfMagnification;
}
void Texture1D::updateToDeviceMemory(Image<unsigned int>&& source)
{
if (texture)
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_1D, texture);
glTexImage1D(GL_TEXTURE_1D, 0, GL_RGBA8, width(source) * height(source), 0, GL_RGBA, GL_UNSIGNED_BYTE, rawData(source));
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, (useFiltering) ? GL_LINEAR : GL_NEAREST);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, (useFiltering) ? GL_LINEAR : GL_NEAREST);
if (sampler)
glGenSamplers(1, &sampler);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_REPEAT);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_REPEAT);
glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, (useFiltering) ? GL_LINEAR : GL_NEAREST);
glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, (useFiltering) ? GL_LINEAR : GL_NEAREST);
PGA_Rendering_GL_checkError();
}
CopyShader::CopyShader(FullscreenQuad& quad)
: quad(quad),
fs(Framework::preprocessShaderSource(::fs, "copy.fs").c_str())
{
quad.attach(prog);
prog.attachShader(fs);
prog.link();
glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_MIRRORED_REPEAT);
glUseProgram(prog);
GLuint tex = glGetUniformLocation(prog, "src");
glUniform1i(tex, 0);
GL_CHECK_ERROR();
}
// Create the plane, including its geometry, texture mapping, normal, and colour
void CCubemap::Create(string sPositiveX, string sNegativeX, string sPositiveY, string sNegativeY, string sPositiveZ, string sNegativeZ)
{
int iWidth, iHeight;
// Generate an OpenGL texture ID for this texture
glGenTextures(1, &m_uiTexture);
glBindTexture(GL_TEXTURE_CUBE_MAP, m_uiTexture);
// Load the six sides
BYTE *pbImagePosX, *pbImageNegX, *pbImagePosY, *pbImageNegY, *pbImagePosZ, *pbImageNegZ;
LoadTexture(sPositiveX, &pbImagePosX, iWidth, iHeight);
LoadTexture(sNegativeX, &pbImageNegX, iWidth, iHeight);
LoadTexture(sPositiveY, &pbImagePosY, iWidth, iHeight);
LoadTexture(sNegativeY, &pbImageNegY, iWidth, iHeight);
LoadTexture(sPositiveZ, &pbImagePosZ, iWidth, iHeight);
LoadTexture(sNegativeZ, &pbImageNegZ, iWidth, iHeight);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, GL_RGB, iWidth, iHeight, 0, GL_BGR, GL_UNSIGNED_BYTE, pbImagePosX);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, GL_RGB, iWidth, iHeight, 0, GL_BGR, GL_UNSIGNED_BYTE, pbImageNegX);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, GL_RGB, iWidth, iHeight, 0, GL_BGR, GL_UNSIGNED_BYTE, pbImagePosY);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, GL_RGB, iWidth, iHeight, 0, GL_BGR, GL_UNSIGNED_BYTE, pbImageNegY);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, GL_RGB, iWidth, iHeight, 0, GL_BGR, GL_UNSIGNED_BYTE, pbImagePosZ);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, GL_RGB, iWidth, iHeight, 0, GL_BGR, GL_UNSIGNED_BYTE, pbImageNegZ);
delete[] pbImagePosX;
delete[] pbImageNegX;
delete[] pbImagePosY;
delete[] pbImageNegY;
delete[] pbImagePosZ;
delete[] pbImageNegZ;
glGenSamplers(1, &m_uiSampler);
glSamplerParameteri(m_uiSampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glSamplerParameteri(m_uiSampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glSamplerParameteri(m_uiSampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(m_uiSampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glSamplerParameteri(m_uiSampler, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glGenerateMipmap(GL_TEXTURE_CUBE_MAP);
}
void LoadTextures()
{
glGenTextures(2, g_textures);
std::string filename(LOCAL_FILE_DIR);
filename += "gamma_ramp.png";
try
{
std::auto_ptr<glimg::ImageSet> pImageSet(glimg::loaders::stb::LoadFromFile(filename.c_str()));
glimg::SingleImage image = pImageSet->GetImage(0, 0, 0);
glimg::Dimensions dims = image.GetDimensions();
glimg::OpenGLPixelTransferParams pxTrans = glimg::GetUploadFormatType(pImageSet->GetFormat(), 0);
glBindTexture(GL_TEXTURE_2D, g_textures[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, dims.width, dims.height, 0,
pxTrans.format, pxTrans.type, image.GetImageData());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, pImageSet->GetMipmapCount() - 1);
glBindTexture(GL_TEXTURE_2D, g_textures[1]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8, dims.width, dims.height, 0,
pxTrans.format, pxTrans.type, image.GetImageData());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, pImageSet->GetMipmapCount() - 1);
glBindTexture(GL_TEXTURE_2D, 0);
}
catch(std::exception &e)
{
printf("%s\n", e.what());
throw;
}
glGenSamplers(1, &g_samplerObj);
glSamplerParameteri(g_samplerObj, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(g_samplerObj, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glSamplerParameteri(g_samplerObj, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glSamplerParameteri(g_samplerObj, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
}
void SamplerCache::SetParameters(GLuint sampler_id, const Params& params)
{
static const GLint min_filters[8] =
{
GL_NEAREST,
GL_NEAREST_MIPMAP_NEAREST,
GL_NEAREST_MIPMAP_LINEAR,
GL_NEAREST,
GL_LINEAR,
GL_LINEAR_MIPMAP_NEAREST,
GL_LINEAR_MIPMAP_LINEAR,
GL_LINEAR,
};
static const GLint wrap_settings[4] =
{
GL_CLAMP_TO_EDGE,
GL_REPEAT,
GL_MIRRORED_REPEAT,
GL_REPEAT,
};
auto& tm0 = params.tm0;
auto& tm1 = params.tm1;
glSamplerParameteri(sampler_id, GL_TEXTURE_MIN_FILTER, min_filters[tm0.min_filter % ArraySize(min_filters)]);
glSamplerParameteri(sampler_id, GL_TEXTURE_MAG_FILTER, tm0.mag_filter ? GL_LINEAR : GL_NEAREST);
glSamplerParameteri(sampler_id, GL_TEXTURE_WRAP_S, wrap_settings[tm0.wrap_s]);
glSamplerParameteri(sampler_id, GL_TEXTURE_WRAP_T, wrap_settings[tm0.wrap_t]);
glSamplerParameterf(sampler_id, GL_TEXTURE_MIN_LOD, tm1.min_lod / 16.f);
glSamplerParameterf(sampler_id, GL_TEXTURE_MAX_LOD, tm1.max_lod / 16.f);
if (GLInterface->GetMode() == GLInterfaceMode::MODE_OPENGL)
{
glSamplerParameterf(sampler_id, GL_TEXTURE_LOD_BIAS, (s32)tm0.lod_bias / 32.f);
if (g_ActiveConfig.iMaxAnisotropy > 0)
glSamplerParameterf(sampler_id, GL_TEXTURE_MAX_ANISOTROPY_EXT, (float)(1 << g_ActiveConfig.iMaxAnisotropy));
}
}
SamplerCache::SamplerCache()
: m_last_max_anisotropy()
{
glGenSamplers(2, m_sampler_id);
glSamplerParameteri(m_sampler_id[0], GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glSamplerParameteri(m_sampler_id[0], GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glSamplerParameteri(m_sampler_id[0], GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(m_sampler_id[0], GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glSamplerParameteri(m_sampler_id[1], GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glSamplerParameteri(m_sampler_id[1], GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glSamplerParameteri(m_sampler_id[1], GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(m_sampler_id[1], GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
SamplerCache::SamplerCache()
{
glGenSamplers(1, &m_point_sampler);
glGenSamplers(1, &m_linear_sampler);
glSamplerParameteri(m_point_sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glSamplerParameteri(m_point_sampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glSamplerParameteri(m_point_sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(m_point_sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glSamplerParameteri(m_linear_sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glSamplerParameteri(m_linear_sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glSamplerParameteri(m_linear_sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(m_linear_sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
void Renderer::loadTextures()
{
glGenTextures(1, &mTextures.water);
{
QImage image(gDefaultPathTextures + "water.png");
int imageSize = image.width(); //for now, assume all images are the same width and height
glBindTexture(GL_TEXTURE_2D, mTextures.water);
glUniform1i(ShaderProgram::raw().uniformLocation("waterTexture"), 0);
int mipLevels = 8;
glTexStorage2D(GL_TEXTURE_2D, mipLevels, GL_RGBA8, imageSize, imageSize);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, imageSize, imageSize,
GL_BGRA, GL_UNSIGNED_BYTE, image.bits());
glGenerateMipmap(GL_TEXTURE_2D);
glSamplerParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glSamplerParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR);
}
}
