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1 /*
2  * Copyright (C) 2011 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 #ifndef ANDROID_HWUI_LAYER_RENDERER_H
18 #define ANDROID_HWUI_LAYER_RENDERER_H
19 
20 #include <cutils/compiler.h>
21 
22 #include "OpenGLRenderer.h"
23 #include "Layer.h"
24 
25 #include <SkBitmap.h>
26 
27 namespace android {
28 namespace uirenderer {
29 
30 class RenderState;
31 
32 ///////////////////////////////////////////////////////////////////////////////
33 // Defines
34 ///////////////////////////////////////////////////////////////////////////////
35 
36 // Debug
37 #if DEBUG_LAYER_RENDERER
38     #define LAYER_RENDERER_LOGD(...) ALOGD(__VA_ARGS__)
39 #else
40     #define LAYER_RENDERER_LOGD(...)
41 #endif
42 
43 ///////////////////////////////////////////////////////////////////////////////
44 // Renderer
45 ///////////////////////////////////////////////////////////////////////////////
46 
47 class LayerRenderer: public OpenGLRenderer {
48 public:
49     LayerRenderer(RenderState& renderState, Layer* layer);
50     virtual ~LayerRenderer();
51 
onViewportInitialized()52     virtual void onViewportInitialized() override { /* do nothing */ }
53     virtual void prepareDirty(int viewportWidth, int viewportHeight,
54             float left, float top, float right, float bottom, bool opaque) override;
55     virtual void clear(float left, float top, float right, float bottom, bool opaque) override;
56     virtual bool finish() override;
57 
58     static Layer* createTextureLayer(RenderState& renderState);
59     static Layer* createRenderLayer(RenderState& renderState, uint32_t width, uint32_t height);
60     static bool resizeLayer(Layer* layer, uint32_t width, uint32_t height);
61     static void updateTextureLayer(Layer* layer, uint32_t width, uint32_t height,
62             bool isOpaque, bool forceFilter, GLenum renderTarget, const float* textureTransform);
63     static void destroyLayer(Layer* layer);
64     static bool copyLayer(RenderState& renderState, Layer* layer, SkBitmap* bitmap);
65 
66     static void flushLayer(RenderState& renderState, Layer* layer);
67 
68 protected:
69     virtual void ensureStencilBuffer() override;
70     virtual bool hasLayer() const override;
71     virtual Region* getRegion() const override;
72     virtual GLuint getTargetFbo() const override;
73     virtual bool suppressErrorChecks() const override;
74 
75 private:
76     void generateMesh();
77 
78     Layer* mLayer;
79 }; // class LayerRenderer
80 
81 }; // namespace uirenderer
82 }; // namespace android
83 
84 #endif // ANDROID_HWUI_LAYER_RENDERER_H
85