Layer.cpp revision 448455fe783b0a711340322dca272b8cc0ebe473 
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        caches(Caches::getInstance()), texture(caches) {
33    mesh = 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.resourceCache.incrementRefcount(this);
51}
52
53Layer::~Layer() {
54    if (colorFilter) caches.resourceCache.decrementRefcount(colorFilter);
55    removeFbo();
56    deleteTexture();
57
58    delete[] mesh;
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    const uint32_t maxTextureSize = caches.maxTextureSize;
79    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
80        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
81                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
82        return false;
83    }
84
85    uint32_t oldWidth = getWidth();
86    uint32_t oldHeight = getHeight();
87
88    setSize(desiredWidth, desiredHeight);
89
90    if (fbo) {
91        caches.activeTexture(0);
92        bindTexture();
93        allocateTexture();
94
95        if (glGetError() != GL_NO_ERROR) {
96            setSize(oldWidth, oldHeight);
97            return false;
98        }
99    }
100
101    if (stencil) {
102        stencil->bind();
103        stencil->resize(desiredWidth, desiredHeight);
104
105        if (glGetError() != GL_NO_ERROR) {
106            setSize(oldWidth, oldHeight);
107            return false;
108        }
109    }
110
111    return true;
112}
113
114void Layer::removeFbo(bool flush) {
115    if (stencil) {
116        GLuint previousFbo;
117        glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
118        if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, fbo);
119        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
120        if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
121
122        caches.renderBufferCache.put(stencil);
123        stencil = NULL;
124    }
125
126    if (fbo) {
127        if (flush) LayerRenderer::flushLayer(this);
128        // If put fails the cache will delete the FBO
129        caches.fboCache.put(fbo);
130        fbo = 0;
131    }
132}
133
134void Layer::setPaint(SkPaint* paint) {
135    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
136}
137
138void Layer::setColorFilter(SkiaColorFilter* filter) {
139    if (colorFilter) {
140        caches.resourceCache.decrementRefcount(colorFilter);
141    }
142    colorFilter = filter;
143    if (colorFilter) {
144        caches.resourceCache.incrementRefcount(colorFilter);
145    }
146}
147
148void Layer::bindTexture() const {
149    if (texture.id) {
150        caches.bindTexture(renderTarget, texture.id);
151    }
152}
153
154void Layer::bindStencilRenderBuffer() const {
155    if (stencil) {
156        stencil->bind();
157    }
158}
159
160void Layer::generateTexture() {
161    if (!texture.id) {
162        glGenTextures(1, &texture.id);
163    }
164}
165
166void Layer::deleteTexture() {
167    if (texture.id) {
168        texture.deleteTexture();
169        texture.id = 0;
170    }
171}
172
173void Layer::clearTexture() {
174    texture.id = 0;
175}
176
177void Layer::allocateTexture() {
178#if DEBUG_LAYERS
179    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
180#endif
181    if (texture.id) {
182        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
183        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
184                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
185    }
186}
187
188void Layer::defer() {
189    const float width = layer.getWidth();
190    const float height = layer.getHeight();
191
192    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
193            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
194        dirtyRect.set(0, 0, width, height);
195    }
196
197    if (deferredList) {
198        deferredList->reset(dirtyRect);
199    } else {
200        deferredList = new DeferredDisplayList(dirtyRect);
201    }
202    DeferStateStruct deferredState(*deferredList, *renderer,
203            DisplayList::kReplayFlag_ClipChildren);
204
205    renderer->initViewport(width, height);
206    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
207            dirtyRect.right, dirtyRect.bottom, !isBlend());
208
209    displayList->defer(deferredState, 0);
210
211    deferredUpdateScheduled = false;
212}
213
214void Layer::cancelDefer() {
215    renderer = NULL;
216    displayList = NULL;
217    deferredUpdateScheduled = false;
218    if (deferredList) {
219        delete deferredList;
220        deferredList = NULL;
221    }
222}
223
224void Layer::flush() {
225    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
226    if (deferredList && renderer) {
227        renderer->setViewport(layer.getWidth(), layer.getHeight());
228        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
229                !isBlend());
230
231        deferredList->flush(*renderer, dirtyRect);
232
233        renderer->finish();
234        renderer = NULL;
235
236        dirtyRect.setEmpty();
237        displayList = NULL;
238    }
239}
240
241void Layer::render() {
242    renderer->setViewport(layer.getWidth(), layer.getHeight());
243    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
244            !isBlend());
245
246    renderer->drawDisplayList(displayList, dirtyRect, DisplayList::kReplayFlag_ClipChildren);
247
248    renderer->finish();
249    renderer = NULL;
250
251    dirtyRect.setEmpty();
252
253    deferredUpdateScheduled = false;
254    displayList = NULL;
255}
256
257}; // namespace uirenderer
258}; // namespace android
259