Layer.cpp revision 34416eaa1c07b3d7a139e780cea8f8d73219650e 
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    hasDrawnSinceUpdate = false;
49    deferredList = NULL;
50    Caches::getInstance().resourceCache.incrementRefcount(this);
51}
52
53Layer::~Layer() {
54    if (colorFilter) Caches::getInstance().resourceCache.decrementRefcount(colorFilter);
55    removeFbo();
56    deleteTexture();
57
58    delete[] mesh;
59    delete[] meshIndices;
60    delete deferredList;
61}
62
63uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
64    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
65}
66
67uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
68    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
69}
70
71bool Layer::resize(const uint32_t width, const uint32_t height) {
72    uint32_t desiredWidth = computeIdealWidth(width);
73    uint32_t desiredHeight = computeIdealWidth(height);
74
75    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
76        return true;
77    }
78
79    const uint32_t maxTextureSize = Caches::getInstance().maxTextureSize;
80    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
81        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
82                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
83        return false;
84    }
85
86    uint32_t oldWidth = getWidth();
87    uint32_t oldHeight = getHeight();
88
89    setSize(desiredWidth, desiredHeight);
90
91    if (fbo) {
92        Caches::getInstance().activeTexture(0);
93        bindTexture();
94        allocateTexture();
95
96        if (glGetError() != GL_NO_ERROR) {
97            setSize(oldWidth, oldHeight);
98            return false;
99        }
100    }
101
102    if (stencil) {
103        stencil->bind();
104        stencil->resize(desiredWidth, desiredHeight);
105
106        if (glGetError() != GL_NO_ERROR) {
107            setSize(oldWidth, oldHeight);
108            return false;
109        }
110    }
111
112    return true;
113}
114
115void Layer::removeFbo(bool flush) {
116    if (stencil) {
117        GLuint previousFbo;
118        glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
119        if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, fbo);
120        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
121        if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
122
123        Caches::getInstance().renderBufferCache.put(stencil);
124        stencil = NULL;
125    }
126
127    if (fbo) {
128        if (flush) LayerRenderer::flushLayer(this);
129        // If put fails the cache will delete the FBO
130        Caches::getInstance().fboCache.put(fbo);
131        fbo = 0;
132    }
133}
134
135void Layer::setPaint(SkPaint* paint) {
136    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
137}
138
139void Layer::setColorFilter(SkiaColorFilter* filter) {
140    if (colorFilter) {
141        Caches::getInstance().resourceCache.decrementRefcount(colorFilter);
142    }
143    colorFilter = filter;
144    if (colorFilter) {
145        Caches::getInstance().resourceCache.incrementRefcount(colorFilter);
146    }
147}
148
149void Layer::defer() {
150    if (!deferredList) {
151        deferredList = new DeferredDisplayList;
152    }
153    DeferStateStruct deferredState(*deferredList, *renderer,
154            DisplayList::kReplayFlag_ClipChildren);
155
156    const float width = layer.getWidth();
157    const float height = layer.getHeight();
158
159    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
160            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
161        dirtyRect.set(0, 0, width, height);
162    }
163
164    renderer->initViewport(width, height);
165    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
166            dirtyRect.right, dirtyRect.bottom, !isBlend());
167
168    displayList->defer(deferredState, 0);
169
170    deferredUpdateScheduled = false;
171}
172
173void Layer::flush() {
174    if (deferredList) {
175        renderer->setViewport(layer.getWidth(), layer.getHeight());
176        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
177                !isBlend());
178
179        deferredList->flush(*renderer, dirtyRect);
180
181        renderer->finish();
182        renderer = NULL;
183
184        dirtyRect.setEmpty();
185        displayList = NULL;
186    }
187}
188
189void Layer::render() {
190    renderer->setViewport(layer.getWidth(), layer.getHeight());
191    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
192            !isBlend());
193
194    renderer->drawDisplayList(displayList, dirtyRect, DisplayList::kReplayFlag_ClipChildren);
195
196    renderer->finish();
197    renderer = NULL;
198
199    dirtyRect.setEmpty();
200
201    deferredUpdateScheduled = false;
202    displayList = NULL;
203}
204
205}; // namespace uirenderer
206}; // namespace android
207