Layer.cpp revision 674554fc36932ca50b15bba41ac6f650254d4e72 
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    SkSafeUnref(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(const SkPaint* paint) {
135    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
136    setColorFilter((paint) ? paint->getColorFilter() : NULL);
137}
138
139void Layer::setColorFilter(SkColorFilter* filter) {
140    SkRefCnt_SafeAssign(colorFilter, filter);
141}
142
143void Layer::bindTexture() const {
144    if (texture.id) {
145        caches.bindTexture(renderTarget, texture.id);
146    }
147}
148
149void Layer::bindStencilRenderBuffer() const {
150    if (stencil) {
151        stencil->bind();
152    }
153}
154
155void Layer::generateTexture() {
156    if (!texture.id) {
157        glGenTextures(1, &texture.id);
158    }
159}
160
161void Layer::deleteTexture() {
162    if (texture.id) {
163        texture.deleteTexture();
164        texture.id = 0;
165    }
166}
167
168void Layer::clearTexture() {
169    texture.id = 0;
170}
171
172void Layer::allocateTexture() {
173#if DEBUG_LAYERS
174    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
175#endif
176    if (texture.id) {
177        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
178        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
179                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
180    }
181}
182
183void Layer::defer() {
184    const float width = layer.getWidth();
185    const float height = layer.getHeight();
186
187    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
188            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
189        dirtyRect.set(0, 0, width, height);
190    }
191
192    delete deferredList;
193    deferredList = new DeferredDisplayList(dirtyRect);
194
195    DeferStateStruct deferredState(*deferredList, *renderer,
196            DisplayList::kReplayFlag_ClipChildren);
197
198    renderer->initViewport(width, height);
199    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
200            dirtyRect.right, dirtyRect.bottom, !isBlend());
201
202    displayList->computeOrdering();
203    displayList->defer(deferredState, 0);
204
205    deferredUpdateScheduled = false;
206}
207
208void Layer::cancelDefer() {
209    renderer = NULL;
210    displayList = NULL;
211    deferredUpdateScheduled = false;
212    if (deferredList) {
213        delete deferredList;
214        deferredList = NULL;
215    }
216}
217
218void Layer::flush() {
219    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
220    if (deferredList && renderer) {
221        renderer->setViewport(layer.getWidth(), layer.getHeight());
222        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
223                !isBlend());
224
225        deferredList->flush(*renderer, dirtyRect);
226
227        renderer->finish();
228        renderer = NULL;
229
230        dirtyRect.setEmpty();
231        displayList = NULL;
232    }
233}
234
235void Layer::render() {
236    renderer->setViewport(layer.getWidth(), layer.getHeight());
237    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
238            !isBlend());
239
240    renderer->drawDisplayList(displayList, dirtyRect, DisplayList::kReplayFlag_ClipChildren);
241
242    renderer->finish();
243    renderer = NULL;
244
245    dirtyRect.setEmpty();
246
247    deferredUpdateScheduled = false;
248    displayList = NULL;
249}
250
251}; // namespace uirenderer
252}; // namespace android
253