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 "VkLayer.h"
20
21 #include "SkColorFilter.h"
22 #include "SkSurface.h"
23 #include "gl/GrGLTypes.h"
24
25 namespace android {
26 namespace uirenderer {
27 namespace skiapipeline {
28
onDraw(SkCanvas * canvas)29 void LayerDrawable::onDraw(SkCanvas* canvas) {
30 DrawLayer(canvas->getGrContext(), canvas, mLayer.get());
31 }
32
DrawLayer(GrContext * context,SkCanvas * canvas,Layer * layer)33 bool LayerDrawable::DrawLayer(GrContext* context, SkCanvas* canvas, Layer* layer) {
34 // transform the matrix based on the layer
35 int saveCount = -1;
36 if (!layer->getTransform().isIdentity()) {
37 saveCount = canvas->save();
38 SkMatrix transform;
39 layer->getTransform().copyTo(transform);
40 canvas->concat(transform);
41 }
42
43 sk_sp<SkImage> layerImage;
44 if (layer->getApi() == Layer::Api::OpenGL) {
45 GlLayer* glLayer = static_cast<GlLayer*>(layer);
46 GrGLTextureInfo externalTexture;
47 externalTexture.fTarget = glLayer->getRenderTarget();
48 externalTexture.fID = glLayer->getTextureId();
49 GrBackendTextureDesc textureDescription;
50 textureDescription.fWidth = glLayer->getWidth();
51 textureDescription.fHeight = glLayer->getHeight();
52 textureDescription.fConfig = kRGBA_8888_GrPixelConfig;
53 textureDescription.fOrigin = kTopLeft_GrSurfaceOrigin;
54 textureDescription.fTextureHandle = reinterpret_cast<GrBackendObject>(&externalTexture);
55 layerImage = SkImage::MakeFromTexture(context, textureDescription);
56 } else {
57 SkASSERT(layer->getApi() == Layer::Api::Vulkan);
58 VkLayer* vkLayer = static_cast<VkLayer*>(layer);
59 canvas->clear(SK_ColorGREEN);
60 layerImage = vkLayer->getImage();
61 }
62
63 if (layerImage) {
64 SkPaint paint;
65 paint.setAlpha(layer->getAlpha());
66 paint.setBlendMode(layer->getMode());
67 paint.setColorFilter(sk_ref_sp(layer->getColorFilter()));
68 canvas->drawImage(layerImage, 0, 0, &paint);
69 }
70 // restore the original matrix
71 if (saveCount >= 0) {
72 canvas->restoreToCount(saveCount);
73 }
74
75 return layerImage;
76 }
77
78 }; // namespace skiapipeline
79 }; // namespace uirenderer
80 }; // namespace android
81