///
// Draw a triangle using the shader pair created in Init()
//
void Draw(EGLDisplay display,EGLSurface surface,int width,int height,GLuint program)
{
#ifndef __FIXED__
GLfloat vVertices[] = {0.0f, 0.5f, 0.0f,
-0.5f, -0.5f, 0.0f,
0.5f, -0.5f, 0.0f};
#else
GLfixed vVertices[] = {F_to_X(0.0f), F_to_X(0.5f),F_to_X(0.0f),
F_to_X(-0.5f),F_to_X(-0.5f), F_to_X(0.0f),
F_to_X(0.5f),F_to_X(-0.5f),F_to_X(0.0f)};
#endif
// Set the viewport
glViewport(0, 0,width,height);
// Clear the color buffer
glClear(GL_COLOR_BUFFER_BIT);
// Use the program object
glUseProgram(program);
// Load the vertex data
#ifndef __FIXED__
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, vVertices);
#else
glVertexAttribPointer(0, 3, GL_FIXED, GL_FALSE, 0, vVertices);
#endif
glEnableVertexAttribArray(0);
glDrawArrays(GL_TRIANGLES, 0, 3);
eglSwapBuffers(display,surface);
}
int main(int argc, char **argv)
#endif
{
GLuint ui32Vbo = 0; // Vertex buffer object handle
GLuint ui32IndexVbo;
GLuint ui32Texture;
int nframes = 100;
bool immidateMode = false;
bool useIndices = true;
bool useTexture = false;
bool useCompTexture = false;
bool useConvertedType = true;
bool useFixed = false;
bool usePoints = false;
bool useCopy = false;
bool useSubCopy = false;
int c;
extern char *optarg;
#ifdef _WIN32
HWND windowId = NULL;
#elif __linux__
Window windowId = NULL;
#elif __APPLE__
void* windowId = NULL;
#endif
// // Inialize SDL window
//
if (SDL_Init(SDL_INIT_NOPARACHUTE | SDL_INIT_VIDEO)) {
fprintf(stderr,"SDL init failed: %s\n", SDL_GetError());
return -1;
}
SDL_Surface *surface = SDL_SetVideoMode(WINDOW_WIDTH,WINDOW_HEIGHT, 32, SDL_HWSURFACE);
if (surface == NULL) {
fprintf(stderr,"Failed to set video mode: %s\n", SDL_GetError());
return -1;
}
SDL_SysWMinfo wminfo;
memset(&wminfo, 0, sizeof(wminfo));
SDL_GetWMInfo(&wminfo);
#ifdef _WIN32
windowId = wminfo.window;
#elif __linux__
windowId = wminfo.info.x11.window;
#elif __APPLE__
windowId = createGLView(wminfo.nsWindowPtr,0,0,WINDOW_WIDTH,WINDOW_HEIGHT);
#endif
int major,minor,num_config;
EGLConfig configs[150];
EGLSurface egl_surface;
EGLContext ctx;
EGLDisplay d = eglGetDisplay(EGL_DEFAULT_DISPLAY);
eglInitialize(d,&major,&minor);
printf("DISPLAY == %p major =%d minor = %d\n",d,major,minor);
eglChooseConfig(d, attribute_list, configs, 150, &num_config);
printf("config returned %d\n",num_config);
egl_surface = eglCreateWindowSurface(d,configs[0],windowId,NULL);
printf("before creating context..\n");
ctx = eglCreateContext(d,configs[0],EGL_NO_CONTEXT,NULL);
printf("SURFACE == %p CONTEXT == %p\n",egl_surface,ctx);
if(eglMakeCurrent(d,egl_surface,egl_surface,ctx)!= EGL_TRUE){
printf("make current failed\n");
return false;
}
printf("after make current\n");
GLenum err = glGetError();
if(err != GL_NO_ERROR) {
printf("error before drawing ->>> %d \n",err);
} else {
printf("no error before drawing\n");
}
if (useTexture) {
glEnable(GL_TEXTURE_2D);
ui32Texture = 1;
glBindTexture(GL_TEXTURE_2D, ui32Texture);
GLenum err = glGetError();
unsigned char *pixels = NULL;
if(useCompTexture) {
pixels = genPalette4_rgb8(TEX_WIDTH,TEX_HEIGHT,3);
glCompressedTexImage2D(GL_TEXTURE_2D,0,GL_PALETTE4_RGB8_OES,TEX_WIDTH,TEX_HEIGHT,0,3*16+TEX_WIDTH*TEX_HEIGHT/2,pixels);
} else {
pixels = genTexture(TEX_WIDTH, TEX_HEIGHT, 4);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TEX_WIDTH, TEX_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
}
delete pixels;
err = glGetError();
if(err != GL_NO_ERROR)
printf("error %d after image \n",err);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
err = glGetError();
if(err != GL_NO_ERROR)
printf("error after min filter \n");
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
err = glGetError();
if(err != GL_NO_ERROR)
printf("error after mag filter \n");
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
err = glGetError();
if(err != GL_NO_ERROR)
printf("error after env mode \n");
if(useCompTexture) {
pixels = genPalette4_rgb8(TEX_WIDTH,TEX_HEIGHT,1);
glCompressedTexSubImage2D(GL_TEXTURE_2D,0,TEX_WIDTH/4,TEX_HEIGHT/4,TEX_WIDTH/8,TEX_HEIGHT/8,GL_PALETTE4_RGB8_OES,3*16+(TEX_WIDTH*TEX_HEIGHT/128),pixels);
} else {
pixels = genRedTexture(TEX_WIDTH/8, TEX_HEIGHT/8, 4);
glTexSubImage2D(GL_TEXTURE_2D,0,TEX_WIDTH/4,TEX_HEIGHT/4,TEX_WIDTH/8,TEX_HEIGHT/8,GL_RGBA,GL_UNSIGNED_BYTE,pixels);
}
err = glGetError();
if(err != GL_NO_ERROR)
printf("error %d after subimage \n",err);
delete pixels;
}
glClearColor(0.6f, 0.8f, 1.0f, 1.0f); // clear blue
float afVertices[] = { -0.4f,-0.4f,0.0f, // Position
1.0f,0.0f,0.0f,1.0f, // Color
0.0f, 0.0f, // texture
12.f, //point size
0.4f,-0.4f,0.0f,
0.0f,1.0f,0.0f,1.0f,
1.0f, 0.0f,
47.0f,
0.0f,0.4f,0.0f,
0.0f,0.0f,1.0f,1.0f,
0.5f, 1.0f,
14.0f
};
#define MAX_T 1
#define MID_T 0
#define MIN_T 0
GLbyte byteVertices[] = { -1,-1,0, // Position
255,0,0,255, // Color
MIN_T, MIN_T, // texture
12, //point size
1,-1,0,
0,255,0,255,
MAX_T,MIN_T,
47,
0,1,0,
0,0,255,255,
MID_T, MAX_T,
14
};
GLfixed fixedVertices[] = { F_to_X(-0.4f),F_to_X(-0.4f),F_to_X(0.0f), // Position
F_to_X(1.0f),F_to_X(0.0f),F_to_X(0.0f),F_to_X(1.0f), // Color
F_to_X(0.0f),F_to_X(0.0f), // texture
F_to_X(12.0f),//points size
F_to_X(0.4f),F_to_X(-0.4f),F_to_X(0.0f),
F_to_X(0.0f),F_to_X(1.0f),F_to_X(0.0f),F_to_X(1.0f),
F_to_X(1.0f),F_to_X( 0.0f),
F_to_X(30.0f),
F_to_X(0.0f),F_to_X(0.4f),F_to_X(0.0f),
F_to_X(0.0f),F_to_X(0.0f),F_to_X(1.0f),F_to_X(1.0f),
F_to_X(0.5f), F_to_X(1.0f),
F_to_X(30.0)
};
unsigned short indices[] = { 2, 1, 0 };
if (!immidateMode) {
glGenBuffers(1, &ui32Vbo);
ui32Vbo = 1;
printf("ui32Vbo = %d\n", ui32Vbo);
glBindBuffer(GL_ARRAY_BUFFER, ui32Vbo);
void* data = (void*)afVertices;
unsigned int uiSize = 3*(sizeof(float)*10);
if(useConvertedType){
if(useFixed){
data = (void*)fixedVertices;
} else {
data = (void*)byteVertices;
uiSize = 3*(sizeof(GLbyte)*10);
}
}
glBufferData(GL_ARRAY_BUFFER, uiSize,data, GL_STATIC_DRAW);
ui32IndexVbo = 2;
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ui32IndexVbo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
}
// Draws a triangle for 800 frames
float angle = 0.0;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
GLvoid* arr = NULL;
GLenum type;
GLenum drawType;
GLenum colorType;
int size_of;
if(useConvertedType){
if(useFixed)
{
arr = fixedVertices;
colorType = type = GL_FIXED;
size_of = sizeof(GLfixed);
} else {
arr = byteVertices;
colorType = GL_UNSIGNED_BYTE;
type = GL_BYTE;
size_of = sizeof(GLbyte);
}
}else {
arr = afVertices;
colorType = type = GL_FLOAT;
size_of = sizeof(float);
}
if(usePoints)
{
drawType = GL_POINTS;
}
else
drawType = GL_TRIANGLES;
GLvoid* data = NULL;
for (int i = 0; i < 100; i++) {
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
glRotatef(angle, 0.0, 0.0, 1.0);
angle += 360.0 / nframes;
// Enable vertex arrays
glEnableClientState(GL_VERTEX_ARRAY);
if (immidateMode) {
glVertexPointer(3,type, size_of * 10, arr);
} else {
glVertexPointer(3,type, size_of * 10, 0);
}
// Set color data in the same way
glEnableClientState(GL_COLOR_ARRAY);
if (immidateMode) {
SWITCH_SOURCE(3)
glColorPointer(4, colorType, size_of * 10, data);
} else {
glColorPointer(4,colorType,size_of * 10, (GLvoid*) (size_of * 3) );
}
if (useTexture) {
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
if (immidateMode) {
SWITCH_SOURCE(7)
glTexCoordPointer(2, type, size_of * 10,data);
} else {
glTexCoordPointer(2, type, size_of * 10, (GLvoid*)(size_of * 7));
}
}
if(usePoints)
{
glEnableClientState(GL_POINT_SIZE_ARRAY_OES);
if (immidateMode) {
SWITCH_SOURCE(9)
glPointSizePointerOES(type,size_of * 10,data);
} else {
glPointSizePointerOES(type,size_of * 10,(GLvoid*)(size_of * 9));
}
}
if (useIndices) {
if (immidateMode) {
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glDrawElements(drawType, 3, GL_UNSIGNED_SHORT, indices);
} else {
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ui32IndexVbo);
glDrawElements(drawType, 3, GL_UNSIGNED_SHORT, 0);
}
} else {
glDrawArrays(drawType, 0, 3);
}
GLenum err = glGetError();
if(err != GL_NO_ERROR)
printf(" error %d has occured while drawing\n",err);
glPopMatrix();
eglSwapBuffers(d,egl_surface);
if(useTexture && useCopy)
glCopyTexImage2D(GL_TEXTURE_2D,0,GL_RGBA,0,0,256,256,0);
else if(useTexture && useSubCopy)
glCopyTexSubImage2D(GL_TEXTURE_2D,0,100,100,WINDOW_WIDTH/2,WINDOW_HEIGHT/2,50,50);
}
err = glGetError();
if(err != GL_NO_ERROR)
printf("error ->>> %d \n",err);
eglDestroySurface(d,egl_surface);
eglDestroyContext(d,ctx);
// Just wait until the window is closed
SDL_Event ev;
while( SDL_WaitEvent(&ev) ) {
if (ev.type == SDL_QUIT) {
break;
}
}
return 0;
}
