BakedOpRenderer.h revision 15c3f19a445b8df575911a16e8a6dba755a084b5 
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 useScissor = state.computedState.clipSideFlags != OpClipSideFlags::None;
72        renderGlop(&state.computedState.clippedBounds,
73                useScissor ? &state.computedState.clipRect : nullptr,
74                glop);
75    }
76
77    void renderGlop(const Rect* dirtyBounds, const Rect* clip, const Glop& glop);
78    bool offscreenRenderTarget() { return mRenderTarget.offscreenBuffer != nullptr; }
79    void dirtyRenderTarget(const Rect& dirtyRect);
80    bool didDraw() { return mHasDrawn; }
81private:
82    void setViewport(uint32_t width, uint32_t height);
83    void clearColorBuffer(const Rect& clearRect);
84
85    RenderState& mRenderState;
86    Caches& mCaches;
87    bool mOpaque;
88    bool mHasDrawn = false;
89
90    // render target state - setup by start/end layer/frame
91    // only valid to use in between start/end pairs.
92    struct {
93        GLuint frameBufferId = 0;
94        OffscreenBuffer* offscreenBuffer = nullptr;
95        uint32_t viewportWidth = 0;
96        uint32_t viewportHeight = 0;
97        Matrix4 orthoMatrix;
98    } mRenderTarget;
99
100    const LightInfo mLightInfo;
101};
102
103}; // namespace uirenderer
104}; // namespace android
105
106#endif // ANDROID_HWUI_BAKED_OP_RENDERER_H
107