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RenderCopyEx,rotation and flipping for all hardware/software backends (#1308)

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This commit is contained in:
Gabriel Jacobo 2012-06-01 19:51:08 -03:00
parent 5791b11bc4
commit 17bdcc6e8e
14 changed files with 1550 additions and 10 deletions
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56
src/render/SDL_render.c
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@ -1231,6 +1231,62 @@ SDL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
&real_dstrect);
}
int
SDL_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect,
const double angle, const SDL_Point *center, const SDL_RendererFlip flip)
{
SDL_Window *window;
SDL_Rect real_srcrect, real_dstrect;
SDL_Point real_center;
CHECK_RENDERER_MAGIC(renderer, -1);
CHECK_TEXTURE_MAGIC(texture, -1);
if (renderer != texture->renderer) {
SDL_SetError("Texture was not created with this renderer");
return -1;
}
if (!renderer->RenderCopyEx) {
SDL_SetError("Renderer does not support RenderCopyEx");
return -1;
}
window = renderer->window;
real_srcrect.x = 0;
real_srcrect.y = 0;
real_srcrect.w = texture->w;
real_srcrect.h = texture->h;
if (srcrect) {
if (!SDL_IntersectRect(srcrect, &real_srcrect, &real_srcrect)) {
return 0;
}
}
/* We don't intersect the dstrect with the viewport as RenderCopy does because of potential rotation clipping issues... TODO: should we? */
if (dstrect) real_dstrect = *dstrect;
else {
real_srcrect.x = 0;
real_srcrect.y = 0;
real_srcrect.w = renderer->viewport.w;
real_srcrect.h = renderer->viewport.h;
}
if (texture->native) {
texture = texture->native;
}
if(center) real_center = *center;
else {
real_center.x = real_dstrect.w/2;
real_center.y = real_dstrect.h/2;
}
return renderer->RenderCopyEx(renderer, texture, &real_srcrect, &real_dstrect, angle, &real_center, flip);
}
int
SDL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, void * pixels, int pitch)