BakedOpRenderer.h revision 7435eb148e72382126e9073183e881357bb38a8b
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#include "utils/Macros.h"
23
24namespace android {
25namespace uirenderer {
26
27class Caches;
28struct Glop;
29class Layer;
30class RenderState;
31struct ClipBase;
32
33/**
34 * Main rendering manager for a collection of work - one frame + any contained FBOs.
35 *
36 * Manages frame and FBO lifecycle, binding the GL framebuffer as appropriate. This is the only
37 * place where FBOs are bound, created, and destroyed.
38 *
39 * All rendering operations will be sent by the Dispatcher, a collection of static methods,
40 * which has intentionally limited access to the renderer functionality.
41 */
42class BakedOpRenderer {
43public:
44    /**
45     * Position agnostic shadow lighting info. Used with all shadow ops in scene.
46     */
47    struct LightInfo {
48        float lightRadius = 0;
49        uint8_t ambientShadowAlpha = 0;
50        uint8_t spotShadowAlpha = 0;
51    };
52
53    BakedOpRenderer(Caches& caches, RenderState& renderState, bool opaque, const LightInfo& lightInfo)
54            : mRenderState(renderState)
55            , mCaches(caches)
56            , mOpaque(opaque)
57            , mLightInfo(lightInfo) {
58    }
59
60    RenderState& renderState() { return mRenderState; }
61    Caches& caches() { return mCaches; }
62
63    void startFrame(uint32_t width, uint32_t height, const Rect& repaintRect);
64    void endFrame(const Rect& repaintRect);
65    WARN_UNUSED_RESULT OffscreenBuffer* startTemporaryLayer(uint32_t width, uint32_t height);
66    void startRepaintLayer(OffscreenBuffer* offscreenBuffer, const Rect& repaintRect);
67    void endLayer();
68    WARN_UNUSED_RESULT OffscreenBuffer* copyToLayer(const Rect& area);
69
70    Texture* getTexture(const SkBitmap* bitmap);
71    const LightInfo& getLightInfo() const { return mLightInfo; }
72
73    void renderGlop(const BakedOpState& state, const Glop& glop) {
74        renderGlop(&state.computedState.clippedBounds,
75                state.computedState.getClipIfNeeded(),
76                glop);
77    }
78    void renderFunctor(const FunctorOp& op, const BakedOpState& state);
79
80    void renderGlop(const Rect* dirtyBounds, const ClipBase* clip, const Glop& glop);
81    bool offscreenRenderTarget() { return mRenderTarget.offscreenBuffer != nullptr; }
82    void dirtyRenderTarget(const Rect& dirtyRect);
83    bool didDraw() const { return mHasDrawn; }
84private:
85    void setViewport(uint32_t width, uint32_t height);
86    void clearColorBuffer(const Rect& clearRect);
87    void prepareRender(const Rect* dirtyBounds, const ClipBase* clip);
88    void setupStencilRectList(const ClipBase* clip);
89    void setupStencilRegion(const ClipBase* clip);
90    void setupStencilQuads(std::vector<Vertex>& quadVertices, int incrementThreshold);
91
92    RenderState& mRenderState;
93    Caches& mCaches;
94    bool mOpaque;
95    bool mHasDrawn = false;
96
97    // render target state - setup by start/end layer/frame
98    // only valid to use in between start/end pairs.
99    struct {
100        // If not drawing to a layer: fbo = 0, offscreenBuffer = null,
101        // Otherwise these refer to currently painting layer's state
102        GLuint frameBufferId = 0;
103        OffscreenBuffer* offscreenBuffer = nullptr;
104
105        // Used when drawing to a layer and using stencil clipping. otherwise null.
106        RenderBuffer* stencil = nullptr;
107
108        // value representing the ClipRectList* or ClipRegion* currently stored in
109        // the stencil of the current render target
110        const ClipBase* lastStencilClip = nullptr;
111
112        // Size of renderable region in current render target - for layers, may not match actual
113        // bounds of FBO texture. offscreenBuffer->texture has this information.
114        uint32_t viewportWidth = 0;
115        uint32_t viewportHeight = 0;
116
117        Matrix4 orthoMatrix;
118    } mRenderTarget;
119
120    const LightInfo mLightInfo;
121};
122
123}; // namespace uirenderer
124}; // namespace android
125
126#endif // ANDROID_HWUI_BAKED_OP_RENDERER_H
127