LayerDrawable.cpp revision 8cd3edfa15cc9cdbffa935d19ab894426b08d174
1/* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "GlLayer.h" 18#include "LayerDrawable.h" 19#include "SkColorFilter.h" 20#include "gl/GrGLTypes.h" 21 22namespace android { 23namespace uirenderer { 24namespace skiapipeline { 25 26void LayerDrawable::onDraw(SkCanvas* canvas) { 27 DrawLayer(canvas->getGrContext(), canvas, mLayer.get()); 28} 29 30bool LayerDrawable::DrawLayer(GrContext* context, SkCanvas* canvas, Layer* layer) { 31 // transform the matrix based on the layer 32 int saveCount = -1; 33 if (!layer->getTransform().isIdentity()) { 34 saveCount = canvas->save(); 35 SkMatrix transform; 36 layer->getTransform().copyTo(transform); 37 canvas->concat(transform); 38 } 39 40 GlLayer* glLayer = static_cast<GlLayer*>(layer); 41 GrGLTextureInfo externalTexture; 42 externalTexture.fTarget = glLayer->getRenderTarget(); 43 externalTexture.fID = glLayer->getTextureId(); 44 GrBackendTextureDesc textureDescription; 45 textureDescription.fWidth = glLayer->getWidth(); 46 textureDescription.fHeight = glLayer->getHeight(); 47 textureDescription.fConfig = kRGBA_8888_GrPixelConfig; 48 textureDescription.fOrigin = kTopLeft_GrSurfaceOrigin; 49 textureDescription.fTextureHandle = reinterpret_cast<GrBackendObject>(&externalTexture); 50 sk_sp<SkImage> layerImage = SkImage::MakeFromTexture(context, textureDescription); 51 if (layerImage) { 52 SkPaint paint; 53 paint.setAlpha(layer->getAlpha()); 54 paint.setBlendMode(layer->getMode()); 55 paint.setColorFilter(sk_ref_sp(layer->getColorFilter())); 56 canvas->drawImage(layerImage, 0, 0, &paint); 57 } 58 // restore the original matrix 59 if (saveCount >= 0) { 60 canvas->restoreToCount(saveCount); 61 } 62 63 return layerImage; 64} 65 66}; // namespace skiapipeline 67}; // namespace uirenderer 68}; // namespace android 69