static Uint32
GetClosestSupportedFormat(SDL_Renderer * renderer, Uint32 format)
{
Uint32 i;
if (SDL_ISPIXELFORMAT_FOURCC(format)) {
/* Look for an exact match */
for (i = 0; i < renderer->info.num_texture_formats; ++i) {
if (renderer->info.texture_formats[i] == format) {
return renderer->info.texture_formats[i];
}
}
} else {
SDL_bool hasAlpha = SDL_ISPIXELFORMAT_ALPHA(format);
/* We just want to match the first format that has the same channels */
for (i = 0; i < renderer->info.num_texture_formats; ++i) {
if (!SDL_ISPIXELFORMAT_FOURCC(renderer->info.texture_formats[i]) &&
SDL_ISPIXELFORMAT_ALPHA(renderer->info.texture_formats[i]) == hasAlpha) {
return renderer->info.texture_formats[i];
}
}
}
return renderer->info.texture_formats[0];
}
uint32_t SDLFrontend::getDisplayFormat () const
{
assert(_renderer);
SDL_RendererInfo info;
SDL_GetRendererInfo(_renderer, &info);
for (int i = 0; i < info.num_texture_formats; ++i) {
if (!SDL_ISPIXELFORMAT_FOURCC(info.texture_formats[i]) && SDL_ISPIXELFORMAT_ALPHA(info.texture_formats[i])) {
return info.texture_formats[i];
}
}
const uint32_t format = info.texture_formats[0];
return format;
}
int main(int argc,char** argv)
{
Uint8 num_pictures;
LoadedPicture* pictures;
int i, j;
SDL_PixelFormat* format = NULL;
SDL_Window *window;
SDL_Renderer *renderer;
SDL_Color black = {0,0,0,0xff};
SDL_Event event;
int event_pending = 0;
int should_exit = 0;
unsigned int current_picture;
int button_down;
Uint32 pixelFormat = 0;
int access = 0;
SDL_Rect texture_dimensions;
/* Enable standard application logging */
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
if(argc < 2) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Shape requires at least one bitmap file as argument.");
exit(-1);
}
if(SDL_VideoInit(NULL) == -1) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not initialize SDL video.");
exit(-2);
}
num_pictures = argc - 1;
pictures = (LoadedPicture *)SDL_malloc(sizeof(LoadedPicture)*num_pictures);
if (!pictures) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not allocate memory.");
exit(1);
}
for(i=0;i<num_pictures;i++)
pictures[i].surface = NULL;
for(i=0;i<num_pictures;i++) {
pictures[i].surface = SDL_LoadBMP(argv[i+1]);
pictures[i].name = argv[i+1];
if(pictures[i].surface == NULL) {
for(j=0;j<num_pictures;j++)
SDL_FreeSurface(pictures[j].surface);
SDL_free(pictures);
SDL_VideoQuit();
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not load surface from named bitmap file: %s", argv[i+1]);
exit(-3);
}
format = pictures[i].surface->format;
if(SDL_ISPIXELFORMAT_ALPHA(format->format)) {
pictures[i].mode.mode = ShapeModeBinarizeAlpha;
pictures[i].mode.parameters.binarizationCutoff = 255;
}
else {
pictures[i].mode.mode = ShapeModeColorKey;
pictures[i].mode.parameters.colorKey = black;
}
}
window = SDL_CreateShapedWindow("SDL_Shape test",
SHAPED_WINDOW_X, SHAPED_WINDOW_Y,
SHAPED_WINDOW_DIMENSION,SHAPED_WINDOW_DIMENSION,
0);
SDL_SetWindowPosition(window, SHAPED_WINDOW_X, SHAPED_WINDOW_Y);
if(window == NULL) {
for(i=0;i<num_pictures;i++)
SDL_FreeSurface(pictures[i].surface);
SDL_free(pictures);
SDL_VideoQuit();
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not create shaped window for SDL_Shape.");
exit(-4);
}
renderer = SDL_CreateRenderer(window,-1,0);
if (!renderer) {
SDL_DestroyWindow(window);
for(i=0;i<num_pictures;i++)
SDL_FreeSurface(pictures[i].surface);
SDL_free(pictures);
SDL_VideoQuit();
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not create rendering context for SDL_Shape window.");
exit(-5);
}
for(i=0;i<num_pictures;i++)
pictures[i].texture = NULL;
for(i=0;i<num_pictures;i++) {
pictures[i].texture = SDL_CreateTextureFromSurface(renderer,pictures[i].surface);
if(pictures[i].texture == NULL) {
for(i=0;i<num_pictures;i++)
if(pictures[i].texture != NULL)
SDL_DestroyTexture(pictures[i].texture);
for(i=0;i<num_pictures;i++)
SDL_FreeSurface(pictures[i].surface);
SDL_free(pictures);
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_VideoQuit();
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not create texture for SDL_shape.");
exit(-6);
}
}
event_pending = 0;
should_exit = 0;
event_pending = SDL_PollEvent(&event);
current_picture = 0;
button_down = 0;
texture_dimensions.h = 0;
texture_dimensions.w = 0;
texture_dimensions.x = 0;
texture_dimensions.y = 0;
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Changing to shaped bmp: %s", pictures[current_picture].name);
SDL_QueryTexture(pictures[current_picture].texture,(Uint32 *)&pixelFormat,(int *)&access,&texture_dimensions.w,&texture_dimensions.h);
SDL_SetWindowSize(window,texture_dimensions.w,texture_dimensions.h);
SDL_SetWindowShape(window,pictures[current_picture].surface,&pictures[current_picture].mode);
while(should_exit == 0) {
event_pending = SDL_PollEvent(&event);
if(event_pending == 1) {
if(event.type == SDL_KEYDOWN) {
button_down = 1;
if(event.key.keysym.sym == SDLK_ESCAPE) {
should_exit = 1;
break;
}
}
if(button_down && event.type == SDL_KEYUP) {
button_down = 0;
current_picture += 1;
if(current_picture >= num_pictures)
current_picture = 0;
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Changing to shaped bmp: %s", pictures[current_picture].name);
SDL_QueryTexture(pictures[current_picture].texture,(Uint32 *)&pixelFormat,(int *)&access,&texture_dimensions.w,&texture_dimensions.h);
SDL_SetWindowSize(window,texture_dimensions.w,texture_dimensions.h);
SDL_SetWindowShape(window,pictures[current_picture].surface,&pictures[current_picture].mode);
}
if(event.type == SDL_QUIT)
should_exit = 1;
event_pending = 0;
}
render(renderer,pictures[current_picture].texture,texture_dimensions);
SDL_Delay(10);
}
/* Free the textures. */
for(i=0;i<num_pictures;i++)
SDL_DestroyTexture(pictures[i].texture);
SDL_DestroyRenderer(renderer);
/* Destroy the window. */
SDL_DestroyWindow(window);
/* Free the original surfaces backing the textures. */
for(i=0;i<num_pictures;i++)
SDL_FreeSurface(pictures[i].surface);
SDL_free(pictures);
/* Call SDL_VideoQuit() before quitting. */
SDL_VideoQuit();
return 0;
}
SDL_Texture *
SDL_CreateTextureFromSurface(SDL_Renderer * renderer, SDL_Surface * surface)
{
const SDL_PixelFormat *fmt;
SDL_bool needAlpha;
Uint32 i;
Uint32 format;
SDL_Texture *texture;
CHECK_RENDERER_MAGIC(renderer, NULL);
if (!surface) {
SDL_SetError("SDL_CreateTextureFromSurface() passed NULL surface");
return NULL;
}
/* See what the best texture format is */
fmt = surface->format;
if (fmt->Amask || SDL_GetColorKey(surface, NULL) == 0) {
needAlpha = SDL_TRUE;
} else {
needAlpha = SDL_FALSE;
}
format = renderer->info.texture_formats[0];
for (i = 0; i < renderer->info.num_texture_formats; ++i) {
if (!SDL_ISPIXELFORMAT_FOURCC(renderer->info.texture_formats[i]) &&
SDL_ISPIXELFORMAT_ALPHA(renderer->info.texture_formats[i]) == needAlpha) {
format = renderer->info.texture_formats[i];
break;
}
}
texture = SDL_CreateTexture(renderer, format, SDL_TEXTUREACCESS_STATIC,
surface->w, surface->h);
if (!texture) {
return NULL;
}
if (format == surface->format->format) {
if (SDL_MUSTLOCK(surface)) {
SDL_LockSurface(surface);
SDL_UpdateTexture(texture, NULL, surface->pixels, surface->pitch);
SDL_UnlockSurface(surface);
} else {
SDL_UpdateTexture(texture, NULL, surface->pixels, surface->pitch);
}
} else {
SDL_PixelFormat *dst_fmt;
SDL_Surface *temp = NULL;
/* Set up a destination surface for the texture update */
dst_fmt = SDL_AllocFormat(format);
temp = SDL_ConvertSurface(surface, dst_fmt, 0);
SDL_FreeFormat(dst_fmt);
if (temp) {
SDL_UpdateTexture(texture, NULL, temp->pixels, temp->pitch);
SDL_FreeSurface(temp);
} else {
SDL_DestroyTexture(texture);
return NULL;
}
}
{
Uint8 r, g, b, a;
SDL_BlendMode blendMode;
SDL_GetSurfaceColorMod(surface, &r, &g, &b);
SDL_SetTextureColorMod(texture, r, g, b);
SDL_GetSurfaceAlphaMod(surface, &a);
SDL_SetTextureAlphaMod(texture, a);
if (SDL_GetColorKey(surface, NULL) == 0) {
/* We converted to a texture with alpha format */
SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);
} else {
SDL_GetSurfaceBlendMode(surface, &blendMode);
SDL_SetTextureBlendMode(texture, blendMode);
}
}
return texture;
}