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Implement blits from mega surfaces to regular Bitmaps 

This is used in events that take their sprite from a tile
out of the tileset.
This commit is contained in:
Jonas Kulla 2013-09-25 17:07:43 +02:00
parent 0fc6022dd0
commit dff2d79a70
2 changed files with 43 additions and 5 deletions
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44
src/bitmap.cpp
View File

@ -319,10 +319,48 @@ void Bitmap::stretchBlt(const IntRect &destRect,
opacity = clamp(opacity, 0, 255);
if (opacity == 0)
return;
if (source.megaSurface())
{
/* Don't do transparent blits for now */
if (opacity < 255)
source.ensureNonMega();
SDL_Surface *srcSurf = source.megaSurface();
int bpp;
Uint32 rMask, gMask, bMask, aMask;
SDL_PixelFormatEnumToMasks(SDL_PIXELFORMAT_ABGR8888,
&bpp, &rMask, &gMask, &bMask, &aMask);
SDL_Surface *blitTemp =
SDL_CreateRGBSurface(0, destRect.w, destRect.h, bpp, rMask, gMask, bMask, aMask);
SDL_Rect srcRect;
srcRect.x = sourceRect.x;
srcRect.y = sourceRect.y;
srcRect.w = sourceRect.w;
srcRect.h = sourceRect.h;
SDL_Rect dstRect;
dstRect.x = dstRect.y = 0;
dstRect.w = blitTemp->w;
dstRect.h = blitTemp->h;
// FXIME: This is supposed to be a scaled blit, put SDL2 for some reason
// makes the source surface unusable after BlitScaled() is called. Investigate!
SDL_BlitSurface(srcSurf, &srcRect, blitTemp, &dstRect);
TEX::bind(p->tex.tex);
TEX::uploadSubImage(destRect.x, destRect.y, destRect.w, destRect.h, blitTemp->pixels, GL_RGBA);
SDL_FreeSurface(blitTemp);
modified();
return;
}
else if (opacity == 255 && !p->touchesTaintedArea(destRect))
if (opacity == 255 && !p->touchesTaintedArea(destRect))
{
/* Fast blit */
flush();
@ -746,12 +784,12 @@ TEXFBO &Bitmap::getGLTypes()
return p->tex;
}
SDL_Surface *Bitmap::megaSurface()
SDL_Surface *Bitmap::megaSurface() const
{
return p->megaSurface;
}
void Bitmap::ensureNonMega()
void Bitmap::ensureNonMega() const
{
if (isDisposed())
return;

4
src/bitmap.h
View File

@ -105,8 +105,8 @@ public:
/* <internal> */
void flush() const;
TEXFBO &getGLTypes();
SDL_Surface *megaSurface();
void ensureNonMega();
SDL_Surface *megaSurface() const;
void ensureNonMega() const;
/* Binds the backing texture and sets the correct
* texture size uniform in shader */