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->textureProvider()->refScratchTexture(desc, GrTextureProvider::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; }
// fixes https://bug.skia.org/5096 static bool is_not_subset(const SkBitmap& bm) { SkASSERT(bm.pixelRef()); SkISize dim = SkISize::Make(bm.pixelRef()->width(), bm.pixelRef()->height()); SkASSERT(dim != bm.dimensions() || bm.pixelRefOrigin().isZero()); return dim == bm.dimensions(); }
// fixes https://bug.skia.org/5096 static bool is_not_subset(const SkBitmap& bm) { SkASSERT(bm.pixelRef()); SkISize dim = bm.pixelRef()->info().dimensions(); SkASSERT(dim != bm.dimensions() || bm.pixelRefOrigin().isZero()); return dim == bm.dimensions(); }