I’m porting my SDL 1.2 application to SDL 2.0 and have run into a problem with 32bit textures, 24bit textures load fine, but the 32bit ones don’t display on the screen… code bellow, thanks for any help in advance…
int SDL_GL_LoadTexture(struct textures *list, GLuint *texture, GLuint *texcount, GLfloat *texcoord, int *w, int *h, int *w2, int *h2)
{
SDL_Surface *tempSurf[100];
SDL_Surface *surface[100];
int d=0;
int x,y;
int tempW[100];
int tempH[100];
SDL_Rect area;
Uint32 saved_flags;
Uint8 saved_alpha;
// Load all surfaces in list
for(d=0;d<*(texcount);d++)
{
tempSurf[d]=loadSurface(list[d].name);
*(w+d)=0;
*(h+d)=0;
*(w+d) = tempSurf[d]->w;
*(h+d) = tempSurf[d]->h;
tempW[d]=0;
tempH[d]=0;
tempW[d]=pow2(*(w+d));
tempH[d]=pow2(*(h+d));
*(w2+d)=0;
*(h2+d)=0;
*(w2+d)=tempW[d];
*(h2+d)=tempH[d];
}
for(d=0;d<*(texcount);d++)
{
if ( tempSurf[d]->format->BytesPerPixel == 3 )
{
surface[d] = SDL_CreateRGBSurface(
SDL_SWSURFACE,
tempW[d], tempH[d],
24,
#if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */
0x000000FF,
0x0000FF00,
0x00FF0000,
0xFF000000
#else
0xFF000000,
0x00FF0000,
0x0000FF00,
0x000000FF
#endif
);
}else{
surface[d] = SDL_CreateRGBSurface(
SDL_SWSURFACE,
tempW[d], tempH[d],
32,
#if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */
0x000000FF,
0x0000FF00,
0x00FF0000,
0xFF000000
#else
0xFF000000,
0x00FF0000,
0x0000FF00,
0x000000FF
#endif
);
}
/*
// Save the alpha blending attributes
saved_flags = tempSurf[d]->flags&(SDL_SRCALPHA|SDL_RLEACCELOK);
saved_alpha = tempSurf[d]->format->alpha;
if ( (saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA )
{
SDL_SetAlpha(tempSurf[d], 0, 0);
}*/
SDL_GetSurfaceAlphaMod(tempSurf[d],&saved_alpha);
SDL_SetSurfaceAlphaMod(tempSurf[d],0);
SDL_BlitSurface(tempSurf[d], NULL, surface[d], NULL);
SDL_SetSurfaceAlphaMod(tempSurf[d],saved_alpha);
/*
// Restore the alpha blending attributes
if ( (saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA )
{
SDL_SetAlpha(tempSurf[d], saved_flags, saved_alpha);
}*/
}
// Genorate and bind textures in list
glGenTextures(*(texcount), texture);
for(d=0;d<*(texcount);d++)
{
glBindTexture(GL_TEXTURE_2D, *(texture+d));
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
if ( surface[d]->format->BytesPerPixel == 3 )
{
glTexImage2D(GL_TEXTURE_2D,0,GL_RGB8,tempW[d],tempH[d],0,GL_RGB,GL_UNSIGNED_BYTE,surface[d]->pixels);
}else{
glTexImage2D(GL_TEXTURE_2D,0,GL_RGBA8,tempW[d],tempH[d],0,GL_RGBA,GL_UNSIGNED_BYTE,surface[d]->pixels);
}
}
for(d=0;d<*(texcount);d++)
{
SDL_FreeSurface(tempSurf[d]);
SDL_FreeSurface(surface[d]);
}
return(0);
}
