BakedOpRenderer.h revision 9e7fcfda28fde747ba4e026772007cea77374e16 
1/*
2 * Copyright (C) 2015 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_BAKED_OP_RENDERER_H
18#define ANDROID_HWUI_BAKED_OP_RENDERER_H
19
20#include "BakedOpState.h"
21#include "Matrix.h"
22
23namespace android {
24namespace uirenderer {
25
26class Caches;
27struct Glop;
28class Layer;
29class RenderState;
30
31/**
32 * Main rendering manager for a collection of work - one frame + any contained FBOs.
33 *
34 * Manages frame and FBO lifecycle, binding the GL framebuffer as appropriate. This is the only
35 * place where FBOs are bound, created, and destroyed.
36 *
37 * All rendering operations will be sent by the Dispatcher, a collection of static methods,
38 * which has intentionally limited access to the renderer functionality.
39 */
40class BakedOpRenderer {
41public:
42    /**
43     * Position agnostic shadow lighting info. Used with all shadow ops in scene.
44     */
45    struct LightInfo {
46        float lightRadius = 0;
47        uint8_t ambientShadowAlpha = 0;
48        uint8_t spotShadowAlpha = 0;
49    };
50
51    BakedOpRenderer(Caches& caches, RenderState& renderState, bool opaque, const LightInfo& lightInfo)
52            : mRenderState(renderState)
53            , mCaches(caches)
54            , mOpaque(opaque)
55            , mLightInfo(lightInfo) {
56    }
57
58    RenderState& renderState() { return mRenderState; }
59    Caches& caches() { return mCaches; }
60
61    void startFrame(uint32_t width, uint32_t height, const Rect& repaintRect);
62    void endFrame();
63    OffscreenBuffer* startTemporaryLayer(uint32_t width, uint32_t height);
64    void startRepaintLayer(OffscreenBuffer* offscreenBuffer, const Rect& repaintRect);
65    void endLayer();
66
67    Texture* getTexture(const SkBitmap* bitmap);
68    const LightInfo& getLightInfo() { return mLightInfo; }
69
70    void renderGlop(const BakedOpState& state, const Glop& glop);
71    bool didDraw() { return mHasDrawn; }
72private:
73    void setViewport(uint32_t width, uint32_t height);
74    void clearColorBuffer(const Rect& clearRect);
75
76    RenderState& mRenderState;
77    Caches& mCaches;
78    bool mOpaque;
79    bool mHasDrawn = false;
80
81    // render target state - setup by start/end layer/frame
82    // only valid to use in between start/end pairs.
83    struct {
84        GLuint frameBufferId = 0;
85        OffscreenBuffer* offscreenBuffer = nullptr;
86        uint32_t viewportWidth = 0;
87        uint32_t viewportHeight = 0;
88        Matrix4 orthoMatrix;
89    } mRenderTarget;
90
91    const LightInfo mLightInfo;
92};
93
94}; // namespace uirenderer
95}; // namespace android
96
97#endif // ANDROID_HWUI_BAKED_OP_RENDERER_H
98