shader_program::~shader_program()
{
(*refcount_)--;
if (!*refcount_) {
deactivate();
GPU_FreeShader(vertex_object_);
GPU_FreeShader(fragment_object_);
GPU_FreeShaderProgram(program_object_);
}
}
void free_shaders(Uint32 v, Uint32 f, Uint32 p)
{
GPU_FreeShader(v);
GPU_FreeShader(f);
GPU_FreeShaderProgram(p);
}
int main(int argc, char **argv)
{
SDL_Surface *screen;
SDL_Event event;
int quit = 0;
SDL_Rect dest;
dest.x = 62;
dest.y = 0;
struct GPU_Glsprite *glsprite;
struct GPU_Glsprite *glsprite2;
struct GPU_GlShader *shader;
struct GPU_Framebuffer *buffer;
framebuffer *buffer2 = new framebuffer;
// 1- inicialize SDL
if(SDL_Init(SDL_INIT_VIDEO) < 0) {
fprintf(stderr, "Video initialization failed: %s\n", SDL_GetError());
//exit(-1);
return 0;
}
atexit(SDL_Quit);
//2-Set Opengl attrs
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
//3- initialize screen
if((screen = SDL_SetVideoMode(800, 600, 0, SDL_OPENGL | SDL_HWSURFACE)) == 0) {
fprintf(stderr, "Video mode set failed: %s\n", SDL_GetError());
// exit(-1);
return 0;
}
GPU_Init();
// glViewport(0, 0, 800, 600);
//5- continue initializing opengl
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
//glOrtho(0, 800, 0, 600, -1, 1);
//gluOrtho2D(-1, 1, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glEnable(GL_DEPTH_TEST);
// initialize the glsprite
SDL_Surface *img = SDL_LoadBMP("terreno.bmp");
// SDL_Color colorkey = {0xFF, 0x00, 0xFF, 0};
if ( (glsprite = (GPU_InitGlsprite(img, 0, TARGET_TEXTURE_2D | FORMAT_RGB | TYPE_UNSIGNED_BYTE))) == 0 ) {
fprintf(stderr, "Error loading the image file!\n");
exit(-1);
}
buffer2->addTexture( TEXTURE_2D, RGB, INTERNAL_RGB, 0, 512, 512);
buffer2->initialize();
shader = GPU_InitShader(0, invertFS);
GPU_BindShader(shader);
GLcharARB *log;
log = GPU_GetShaderLog(shader);
printf(log);
free(log);
// GPU_SendUniform1f(shader, "Alpha", 0.2f);
GPU_SendTexture(shader, "texture", 0);
//GPU_SendUniform1f(shader, "desaturate", 1.0);
//GPU_SendUniform1f(shader, "toning", 1.0);
//GPU_SendUniform1f(shader, "texsize", 512.0);
//GPU_SendUniform1f(shader, "scale", 2.0);
//GPU_SendUniform1f(shader, "numtiles", 40000.0);
//GPU_SendUniform1f(shader, "edgewidth", 0.1);
//GPU_BlitSpriteOnFramebuffer(buffer, glsprite, &dest);
buffer2->bind();
{
glViewport(0, 0, 512, 512);
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glBindTexture(GL_TEXTURE_2D, glsprite->texID);
glEnable(GL_TEXTURE_2D);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glBegin(GL_QUADS);
glTexCoord2f(0, 0); glVertex3f(-1, -1, -0.5f);
glTexCoord2f(1, 0); glVertex3f( 1, -1, -0.5f);
glTexCoord2f(1, 1); glVertex3f( 1, 1, -0.5f);
glTexCoord2f(0, 1); glVertex3f(-1, 1, -0.5f);
glEnd();
glPopMatrix();
}
buffer2->unbind();
GPU_UnbindShader();
SDL_Surface *surface;
Uint32 rmask, gmask, bmask, amask;
/* SDL interprets each pixel as a 32-bit number, so our masks must depend
on the endianness (byte order) of the machine */
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
rmask = 0xff000000;
gmask = 0x00ff0000;
bmask = 0x0000ff00;
amask = 0x000000ff;
#else
rmask = 0x000000ff;
gmask = 0x0000ff00;
bmask = 0x00ff0000;
amask = 0xff000000;
#endif
surface = SDL_CreateRGBSurface(SDL_HWSURFACE, 512, 512, 24, rmask, gmask, bmask, 0);
if(surface == NULL) {
return 0;
}
buffer2->bind();
{
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glReadPixels(0, 0, 512, 512, GL_RGB, GL_UNSIGNED_BYTE, surface->pixels);
}
buffer2->unbind();
//img2 = GPU_FramebufferToSurface(buffer);
SDL_SaveBMP(surface, "TerrainWithShader.bmp" );
/*
if ( (glsprite2 = (GPU_InitGlsprite(img2, 0, TARGET_TEXTURE_2D | FORMAT_RGB | TYPE_UNSIGNED_BYTE))) == 0 ) {
fprintf(stderr, "Error loading the image file 2!\n");
exit(-1);
}
*/
// GPU_FreeFramebuffer(buffer);
// free(buffer);
//buffer2 = GPU_FramebufferInit( TARGET_TEXTURE_2D | FORMAT_RGB | TYPE_UNSIGNED_BYTE, img->w, img->h );
/* shader2 = GPU_ShaderInit(0, brightnessShader);
GPU_SendTexture(shader2, "texture", 0);
//GPU_AddShader(buffer, shader2);
glUseProgramObjectARB( shader2->program);
GPU_BlitOnFramebuffer(buffer, glsprite2, &dest);
glUseProgramObjectARB( 0);
if ( (glsprite3 = (GPU_AllocGlsprite(GPU_FramebufferToSurface(buffer), 0, TARGET_TEXTURE_2D | FORMAT_RGB | TYPE_UNSIGNED_BYTE))) == 0 ) {
fprintf(stderr, "Error loading the image file!\n");
exit(-1);
}
/* main loop */
while (!quit) {
while (SDL_PollEvent(&event)) {
switch (event.type) {
case SDL_QUIT:
quit = 1;
break;
case SDL_KEYDOWN:
switch( event.key.keysym.sym ){
case SDLK_ESCAPE:
case SDLK_q:
quit = 1;
break;
case SDLK_F1:
SDL_WM_ToggleFullScreen(screen);
break;
default:
break;
}
}
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
GPU_DrawGlsprite(glsprite, 0);
// GPU_BlitFramebufferOnScreen(buffer, glsprite, &dest);
glFlush();
SDL_GL_SwapBuffers();
}
// SDL_SaveBMP(GPU_FramebufferToSurface(buffer), "buffer2shaders.bmp" );
// quit
GPU_FreeGlsprite(glsprite);
delete buffer2;
GPU_FreeShader(shader);
SDL_Quit();
return 0;
}