pandory500/SDL-mirror
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Ported over, to the best of my ability, the code for Win32 shaped windows and patched in the correct C syntax and coding conventions of SDL.

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This commit is contained in:
Eli Gottlieb 2010-07-08 22:52:49 -04:00
parent e5592bfb4b
commit 7e0f1f1898
4 changed files with 338 additions and 10 deletions
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20
src/video/SDL_shape.c
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@ -41,18 +41,22 @@ SDL_bool SDL_IsShapedWindow(const SDL_Window *window) {
if(window == NULL)
return SDL_FALSE;
else
return window->shaper != NULL;
return (SDL_bool)(window->shaper != NULL)
}
/* REQUIRES that bitmap point to a w-by-h bitmap with 1bpp. */
void SDL_CalculateShapeBitmap(Uint8 alphacutoff,SDL_Surface *shape,Uint8* bitmap,Uint8 ppb,Uint8 value) {
int x = 0;
int y = 0;
Uint8 alpha = 0;
Uint8* pixel;
Uint32 bitmap_pixel;
if(SDL_MUSTLOCK(shape))
SDL_LockSurface(shape);
int x = 0,y = 0;
for(x = 0;x<shape->w;x++)
for(y = 0;y<shape->h;y++) {
void* pixel = shape->pixels + (y*shape->pitch) + (x*shape->format->BytesPerPixel);
Uint8 alpha = 0;
pixel = shape->pixels + (y*shape->pitch) + (x*shape->format->BytesPerPixel);
alpha = 0;
SDL_GetRGBA(*(Uint32*)pixel,shape->format,NULL,NULL,NULL,&alpha);
Uint32 bitmap_pixel = y*shape->w + x;
bitmap[bitmap_pixel / ppb] |= (alpha >= alphacutoff ? value : 0) << ((ppb - 1) - (bitmap_pixel % ppb));
@ -62,6 +66,7 @@ void SDL_CalculateShapeBitmap(Uint8 alphacutoff,SDL_Surface *shape,Uint8* bitmap
}
int SDL_SetWindowShape(SDL_Window *window,SDL_Surface *shape,SDL_WindowShapeMode *shapeMode) {
int result;
if(window == NULL || !SDL_IsShapedWindow(window))
//The window given was not a shapeable window.
return -2;
@ -82,9 +87,9 @@ int SDL_SetWindowShape(SDL_Window *window,SDL_Surface *shape,SDL_WindowShapeMode
}
}
//TODO: Platform-specific implementations of SetWindowShape. X11 is finished. Win32 is in progress.
int result = window->display->device->shape_driver.SetWindowShape(window->shaper,shape,shapeMode);
result = window->display->device->shape_driver.SetWindowShape(window->shaper,shape,shapeMode);
window->shaper->hasshape = SDL_TRUE;
if(window->shaper->usershownflag & SDL_WINDOW_SHOWN == SDL_WINDOW_SHOWN) {
if((window->shaper->usershownflag & SDL_WINDOW_SHOWN) == SDL_WINDOW_SHOWN) {
SDL_ShowWindow(window);
window->shaper->usershownflag &= !SDL_WINDOW_SHOWN;
}
@ -92,7 +97,8 @@ int SDL_SetWindowShape(SDL_Window *window,SDL_Surface *shape,SDL_WindowShapeMode
}
SDL_bool SDL_WindowHasAShape(SDL_Window *window) {
assert(window != NULL && SDL_IsShapedWindow(window));
if (window == NULL && !SDL_IsShapedWindow(window))
return SDL_FALSE;
return window->shaper->hasshape;
}