| /* |
| * Copyright 2017 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkSGRenderNode.h" |
| |
| #include "SkCanvas.h" |
| #include "SkImageFilter.h" |
| #include "SkPaint.h" |
| |
| namespace sksg { |
| |
| RenderNode::RenderNode(uint32_t inval_traits) : INHERITED(inval_traits) {} |
| |
| void RenderNode::render(SkCanvas* canvas, const RenderContext* ctx) const { |
| SkASSERT(!this->hasInval()); |
| this->onRender(canvas, ctx); |
| } |
| |
| bool RenderNode::RenderContext::modulatePaint(SkPaint* paint) const { |
| const auto initial_alpha = paint->getAlpha(), |
| alpha = SkToU8(sk_float_round2int(initial_alpha * fOpacity)); |
| |
| if (alpha != initial_alpha || fColorFilter) { |
| paint->setAlpha(alpha); |
| paint->setColorFilter(SkColorFilter::MakeComposeFilter(fColorFilter, |
| paint->refColorFilter())); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| RenderNode::ScopedRenderContext::ScopedRenderContext(SkCanvas* canvas, const RenderContext* ctx) |
| : fCanvas(canvas) |
| , fCtx(ctx ? *ctx : RenderContext()) |
| , fRestoreCount(canvas->getSaveCount()) {} |
| |
| RenderNode::ScopedRenderContext::~ScopedRenderContext() { |
| if (fRestoreCount >= 0) { |
| fCanvas->restoreToCount(fRestoreCount); |
| } |
| } |
| |
| RenderNode::ScopedRenderContext&& |
| RenderNode::ScopedRenderContext::modulateOpacity(float opacity) { |
| SkASSERT(opacity >= 0 && opacity <= 1); |
| fCtx.fOpacity *= opacity; |
| return std::move(*this); |
| } |
| |
| RenderNode::ScopedRenderContext&& |
| RenderNode::ScopedRenderContext::modulateColorFilter(sk_sp<SkColorFilter> cf) { |
| fCtx.fColorFilter = SkColorFilter::MakeComposeFilter(std::move(fCtx.fColorFilter), |
| std::move(cf)); |
| return std::move(*this); |
| } |
| |
| RenderNode::ScopedRenderContext&& |
| RenderNode::ScopedRenderContext::setIsolation(const SkRect& bounds, bool isolation) { |
| if (isolation) { |
| SkPaint layer_paint; |
| if (fCtx.modulatePaint(&layer_paint)) { |
| fCanvas->saveLayer(bounds, &layer_paint); |
| fCtx = RenderContext(); |
| } |
| } |
| return std::move(*this); |
| } |
| |
| RenderNode::ScopedRenderContext&& |
| RenderNode::ScopedRenderContext::setFilterIsolation(const SkRect& bounds, |
| sk_sp<SkImageFilter> filter) { |
| SkPaint layer_paint; |
| fCtx.modulatePaint(&layer_paint); |
| |
| SkASSERT(!layer_paint.getImageFilter()); |
| layer_paint.setImageFilter(std::move(filter)); |
| fCanvas->saveLayer(bounds, &layer_paint); |
| fCtx = RenderContext(); |
| |
| return std::move(*this); |
| } |
| |
| } // namespace sksg |