Layer.cpp revision 96885eb480c5e0526fe2f77d30f6e551f3f3ceab 
1/*
2 * Copyright (C) 2012 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#define LOG_TAG "OpenGLRenderer"
18
19#include <utils/Log.h>
20
21#include "DisplayList.h"
22#include "DeferredDisplayList.h"
23#include "Layer.h"
24#include "LayerRenderer.h"
25#include "OpenGLRenderer.h"
26#include "Caches.h"
27
28namespace android {
29namespace uirenderer {
30
31Layer::Layer(const uint32_t layerWidth, const uint32_t layerHeight) {
32    mesh = NULL;
33    meshIndices = NULL;
34    meshElementCount = 0;
35    cacheable = true;
36    dirty = false;
37    textureLayer = false;
38    renderTarget = GL_TEXTURE_2D;
39    texture.width = layerWidth;
40    texture.height = layerHeight;
41    colorFilter = NULL;
42    deferredUpdateScheduled = false;
43    renderer = NULL;
44    displayList = NULL;
45    fbo = 0;
46    stencil = NULL;
47    debugDrawUpdate = false;
48    deferredList = NULL;
49    Caches::getInstance().resourceCache.incrementRefcount(this);
50}
51
52Layer::~Layer() {
53    if (colorFilter) Caches::getInstance().resourceCache.decrementRefcount(colorFilter);
54    removeFbo();
55    deleteTexture();
56
57    delete[] mesh;
58    delete[] meshIndices;
59    delete deferredList;
60}
61
62uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
63    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
64}
65
66uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
67    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
68}
69
70bool Layer::resize(const uint32_t width, const uint32_t height) {
71    uint32_t desiredWidth = computeIdealWidth(width);
72    uint32_t desiredHeight = computeIdealWidth(height);
73
74    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
75        return true;
76    }
77
78    uint32_t oldWidth = getWidth();
79    uint32_t oldHeight = getHeight();
80
81    setSize(desiredWidth, desiredHeight);
82
83    if (fbo) {
84        Caches::getInstance().activeTexture(0);
85        bindTexture();
86        allocateTexture(GL_RGBA, GL_UNSIGNED_BYTE);
87
88        if (glGetError() != GL_NO_ERROR) {
89            setSize(oldWidth, oldHeight);
90            return false;
91        }
92    }
93
94    if (stencil) {
95        stencil->bind();
96        stencil->resize(desiredWidth, desiredHeight);
97
98        if (glGetError() != GL_NO_ERROR) {
99            setSize(oldWidth, oldHeight);
100            return false;
101        }
102    }
103
104    return true;
105}
106
107void Layer::removeFbo(bool flush) {
108    if (stencil) {
109        GLuint previousFbo;
110        glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
111        if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, fbo);
112        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
113        if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
114
115        Caches::getInstance().renderBufferCache.put(stencil);
116        stencil = NULL;
117    }
118
119    if (fbo) {
120        if (flush) LayerRenderer::flushLayer(this);
121        // If put fails the cache will delete the FBO
122        Caches::getInstance().fboCache.put(fbo);
123        fbo = 0;
124    }
125}
126
127void Layer::setPaint(SkPaint* paint) {
128    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
129}
130
131void Layer::setColorFilter(SkiaColorFilter* filter) {
132    if (colorFilter) {
133        Caches::getInstance().resourceCache.decrementRefcount(colorFilter);
134    }
135    colorFilter = filter;
136    if (colorFilter) {
137        Caches::getInstance().resourceCache.incrementRefcount(colorFilter);
138    }
139}
140
141void Layer::defer() {
142    if (!deferredList) {
143        deferredList = new DeferredDisplayList;
144    }
145    DeferStateStruct deferredState(*deferredList, *renderer,
146            DisplayList::kReplayFlag_ClipChildren);
147
148    const float width = layer.getWidth();
149    const float height = layer.getHeight();
150
151    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
152            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
153        dirtyRect.set(0, 0, width, height);
154    }
155
156    renderer->initViewport(width, height);
157    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
158            dirtyRect.right, dirtyRect.bottom, !isBlend());
159
160    displayList->defer(deferredState, 0);
161}
162
163void Layer::flush() {
164    if (deferredList && !deferredList->isEmpty()) {
165        renderer->setViewport(layer.getWidth(), layer.getHeight());
166        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
167                !isBlend());
168
169        deferredList->flush(*renderer, dirtyRect);
170
171        renderer->finish();
172        renderer = NULL;
173
174        dirtyRect.setEmpty();
175        deferredList->clear();
176    }
177}
178
179}; // namespace uirenderer
180}; // namespace android
181