bool SkXfermodeImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx, SkBitmap* result, SkIPoint* offset) const { SkBitmap background = src; SkIPoint backgroundOffset = SkIPoint::Make(0, 0); if (getInput(0) && !getInput(0)->getInputResultGPU(proxy, src, ctx, &background, &backgroundOffset)) { return onFilterImage(proxy, src, ctx, result, offset); } GrTexture* backgroundTex = background.getTexture(); SkBitmap foreground = src; SkIPoint foregroundOffset = SkIPoint::Make(0, 0); if (getInput(1) && !getInput(1)->getInputResultGPU(proxy, src, ctx, &foreground, &foregroundOffset)) { return onFilterImage(proxy, src, ctx, result, offset); } GrTexture* foregroundTex = foreground.getTexture(); GrContext* context = foregroundTex->getContext(); GrFragmentProcessor* xferProcessor = NULL; GrSurfaceDesc desc; desc.fFlags = kRenderTarget_GrSurfaceFlag | kNoStencil_GrSurfaceFlag; desc.fWidth = src.width(); desc.fHeight = src.height(); desc.fConfig = kSkia8888_GrPixelConfig; SkAutoTUnref<GrTexture> dst( context->refScratchTexture(desc, GrContext::kApprox_ScratchTexMatch)); if (!dst) { return false; } GrContext::AutoRenderTarget art(context, dst->asRenderTarget()); if (!fMode || !fMode->asFragmentProcessor(&xferProcessor, backgroundTex)) { // canFilterImageGPU() should've taken care of this SkASSERT(false); return false; } SkMatrix foregroundMatrix = GrCoordTransform::MakeDivByTextureWHMatrix(foregroundTex); foregroundMatrix.preTranslate(SkIntToScalar(backgroundOffset.fX-foregroundOffset.fX), SkIntToScalar(backgroundOffset.fY-foregroundOffset.fY)); SkRect srcRect; src.getBounds(&srcRect); GrPaint paint; paint.addColorTextureProcessor(foregroundTex, foregroundMatrix); paint.addColorProcessor(xferProcessor)->unref(); context->drawRect(paint, srcRect); offset->fX = backgroundOffset.fX; offset->fY = backgroundOffset.fY; WrapTexture(dst, src.width(), src.height(), result); return true; }
bool SkDisplacementMapEffect::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx, SkBitmap* result, SkIPoint* offset) const { SkBitmap colorBM = src; SkIPoint colorOffset = SkIPoint::Make(0, 0); if (getColorInput() && !getColorInput()->getInputResultGPU(proxy, src, ctx, &colorBM, &colorOffset)) { return false; } SkBitmap displacementBM = src; SkIPoint displacementOffset = SkIPoint::Make(0, 0); if (getDisplacementInput() && !getDisplacementInput()->getInputResultGPU(proxy, src, ctx, &displacementBM, &displacementOffset)) { return false; } SkIRect bounds; // Since GrDisplacementMapEffect does bounds checking on color pixel access, we don't need to // pad the color bitmap to bounds here. if (!this->applyCropRect(ctx, colorBM, colorOffset, &bounds)) { return false; } SkIRect displBounds; if (!this->applyCropRect(ctx, proxy, displacementBM, &displacementOffset, &displBounds, &displacementBM)) { return false; } if (!bounds.intersect(displBounds)) { return false; } GrTexture* color = colorBM.getTexture(); GrTexture* displacement = displacementBM.getTexture(); GrContext* context = color->getContext(); GrSurfaceDesc desc; desc.fFlags = kRenderTarget_GrSurfaceFlag; desc.fWidth = bounds.width(); desc.fHeight = bounds.height(); desc.fConfig = kSkia8888_GrPixelConfig; SkAutoTUnref<GrTexture> dst( context->refScratchTexture(desc, GrContext::kApprox_ScratchTexMatch)); if (!dst) { return false; } SkVector scale = SkVector::Make(fScale, fScale); ctx.ctm().mapVectors(&scale, 1); GrPaint paint; SkMatrix offsetMatrix = GrCoordTransform::MakeDivByTextureWHMatrix(displacement); offsetMatrix.preTranslate(SkIntToScalar(colorOffset.fX - displacementOffset.fX), SkIntToScalar(colorOffset.fY - displacementOffset.fY)); paint.addColorProcessor( GrDisplacementMapEffect::Create(fXChannelSelector, fYChannelSelector, scale, displacement, offsetMatrix, color, colorBM.dimensions()))->unref(); SkIRect colorBounds = bounds; colorBounds.offset(-colorOffset); SkMatrix matrix; matrix.setTranslate(-SkIntToScalar(colorBounds.x()), -SkIntToScalar(colorBounds.y())); context->drawRect(dst->asRenderTarget(), GrClip::WideOpen(), paint, matrix, SkRect::Make(colorBounds)); offset->fX = bounds.left(); offset->fY = bounds.top(); WrapTexture(dst, bounds.width(), bounds.height(), result); return true; }