void Bitmap::stretchBlt(const IntRect &destRect,
const Bitmap &source, const IntRect &sourceRect,
int opacity)
{
GUARD_DISPOSED;
GUARD_MEGA;
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->gl.tex);
TEX::uploadSubImage(destRect.x, destRect.y, destRect.w, destRect.h, blitTemp->pixels, GL_RGBA);
SDL_FreeSurface(blitTemp);
modified();
return;
}
if (opacity == 255 && !p->touchesTaintedArea(destRect))
{
/* Fast blit */
FBO::bind(source.p->gl.fbo, FBO::Read);
FBO::bind(p->gl.fbo, FBO::Draw);
FBO::blit(sourceRect.x, sourceRect.y, sourceRect.w, sourceRect.h,
destRect.x, destRect.y, destRect.w, destRect.h);
}
else
{
/* Fragment pipeline */
float normOpacity = (float) opacity / 255.0f;
TEXFBO &gpTex = shState->gpTexFBO(destRect.w, destRect.h);
FBO::bind(gpTex.fbo, FBO::Draw);
FBO::bind(p->gl.fbo, FBO::Read);
FBO::blit(destRect.x, destRect.y, 0, 0, destRect.w, destRect.h);
FloatRect bltSubRect((float) sourceRect.x / source.width(),
(float) sourceRect.y / source.height(),
((float) source.width() / sourceRect.w) * ((float) destRect.w / gpTex.width),
((float) source.height() / sourceRect.h) * ((float) destRect.h / gpTex.height));
BltShader &shader = shState->shaders().blt;
shader.bind();
shader.setDestination(gpTex.tex);
shader.setSubRect(bltSubRect);
shader.setOpacity(normOpacity);
Quad &quad = shState->gpQuad();
quad.setTexPosRect(sourceRect, destRect);
quad.setColor(Vec4(1, 1, 1, normOpacity));
source.p->bindTexture(shader);
p->bindFBO();
p->pushSetViewport(shader);
p->blitQuad(quad);
p->popViewport();
}
p->addTaintedArea(destRect);
modified();
}
void Bitmap::stretchBlt(const IntRect &destRect,
const Bitmap &source, const IntRect &sourceRect,
int opacity)
{
guardDisposed();
GUARD_MEGA;
if (source.isDisposed())
return;
opacity = clamp(opacity, 0, 255);
if (opacity == 0)
return;
SDL_Surface *srcSurf = source.megaSurface();
if (srcSurf && shState->config().subImageFix)
{
/* Blit from software surface, for broken GL drivers */
Vec2i gpTexSize;
shState->ensureTexSize(sourceRect.w, sourceRect.h, gpTexSize);
shState->bindTex();
GLMeta::subRectImageUpload(srcSurf->w, sourceRect.x, sourceRect.y, 0, 0,
sourceRect.w, sourceRect.h, srcSurf, GL_RGBA);
GLMeta::subRectImageEnd();
SimpleShader &shader = shState->shaders().simple;
shader.bind();
shader.setTranslation(Vec2i());
shader.setTexSize(gpTexSize);
p->pushSetViewport(shader);
p->bindFBO();
Quad &quad = shState->gpQuad();
quad.setTexRect(FloatRect(0, 0, sourceRect.w, sourceRect.h));
quad.setPosRect(destRect);
p->blitQuad(quad);
p->popViewport();
p->addTaintedArea(destRect);
p->onModified();
return;
}
else if (srcSurf)
{
/* Blit from software surface */
/* Don't do transparent blits for now */
if (opacity < 255)
source.ensureNonMega();
SDL_Rect srcRect = sourceRect;
SDL_Rect dstRect = destRect;
SDL_Rect btmRect = { 0, 0, width(), height() };
SDL_Rect bltRect;
if (SDL_IntersectRect(&btmRect, &dstRect, &bltRect) != SDL_TRUE)
return;
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_BlitScaled(srcSurf, &srcRect, blitTemp, 0);
TEX::bind(p->gl.tex);
if (bltRect.w == dstRect.w && bltRect.h == dstRect.h)
{
/* Dest rectangle lies within bounding box */
TEX::uploadSubImage(destRect.x, destRect.y,
destRect.w, destRect.h,
blitTemp->pixels, GL_RGBA);
}
else
{
/* Clipped blit */
GLMeta::subRectImageUpload(blitTemp->w, bltRect.x - dstRect.x, bltRect.y - dstRect.y,
bltRect.x, bltRect.y, bltRect.w, bltRect.h, blitTemp, GL_RGBA);
GLMeta::subRectImageEnd();
}
SDL_FreeSurface(blitTemp);
p->onModified();
return;
}
if (opacity == 255 && !p->touchesTaintedArea(destRect))
{
/* Fast blit */
GLMeta::blitBegin(p->gl);
GLMeta::blitSource(source.p->gl);
GLMeta::blitRectangle(sourceRect, destRect);
GLMeta::blitEnd();
}
else
{
/* Fragment pipeline */
float normOpacity = (float) opacity / 255.0f;
TEXFBO &gpTex = shState->gpTexFBO(destRect.w, destRect.h);
GLMeta::blitBegin(gpTex);
GLMeta::blitSource(p->gl);
GLMeta::blitRectangle(destRect, Vec2i());
GLMeta::blitEnd();
FloatRect bltSubRect((float) sourceRect.x / source.width(),
(float) sourceRect.y / source.height(),
((float) source.width() / sourceRect.w) * ((float) destRect.w / gpTex.width),
((float) source.height() / sourceRect.h) * ((float) destRect.h / gpTex.height));
BltShader &shader = shState->shaders().blt;
shader.bind();
shader.setDestination(gpTex.tex);
shader.setSubRect(bltSubRect);
shader.setOpacity(normOpacity);
Quad &quad = shState->gpQuad();
quad.setTexPosRect(sourceRect, destRect);
quad.setColor(Vec4(1, 1, 1, normOpacity));
source.p->bindTexture(shader);
p->bindFBO();
p->pushSetViewport(shader);
p->blitQuad(quad);
p->popViewport();
}
p->addTaintedArea(destRect);
p->onModified();
}