Layer.cpp revision b265e2ca50b6ceb2fd2987ef1f7d063b1bde19ae 
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 "Caches.h"
22#include "DeferredDisplayList.h"
23#include "Layer.h"
24#include "LayerRenderer.h"
25#include "OpenGLRenderer.h"
26#include "RenderNode.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    forceFilter = false;
50    deferredList = NULL;
51    caches.resourceCache.incrementRefcount(this);
52}
53
54Layer::~Layer() {
55    SkSafeUnref(colorFilter);
56    removeFbo();
57    deleteTexture();
58
59    delete[] mesh;
60    delete deferredList;
61    delete renderer;
62}
63
64uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
65    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
66}
67
68uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
69    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
70}
71
72void Layer::requireRenderer() {
73    if (!renderer) {
74        renderer = new LayerRenderer(this);
75        renderer->initProperties();
76    }
77}
78
79bool Layer::resize(const uint32_t width, const uint32_t height) {
80    uint32_t desiredWidth = computeIdealWidth(width);
81    uint32_t desiredHeight = computeIdealWidth(height);
82
83    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
84        return true;
85    }
86
87    const uint32_t maxTextureSize = caches.maxTextureSize;
88    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
89        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
90                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
91        return false;
92    }
93
94    uint32_t oldWidth = getWidth();
95    uint32_t oldHeight = getHeight();
96
97    setSize(desiredWidth, desiredHeight);
98
99    if (fbo) {
100        caches.activeTexture(0);
101        bindTexture();
102        allocateTexture();
103
104        if (glGetError() != GL_NO_ERROR) {
105            setSize(oldWidth, oldHeight);
106            return false;
107        }
108    }
109
110    if (stencil) {
111        stencil->bind();
112        stencil->resize(desiredWidth, desiredHeight);
113
114        if (glGetError() != GL_NO_ERROR) {
115            setSize(oldWidth, oldHeight);
116            return false;
117        }
118    }
119
120    return true;
121}
122
123void Layer::removeFbo(bool flush) {
124    if (stencil) {
125        GLuint previousFbo;
126        glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
127        if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, fbo);
128        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
129        if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
130
131        caches.renderBufferCache.put(stencil);
132        stencil = NULL;
133    }
134
135    if (fbo) {
136        if (flush) LayerRenderer::flushLayer(this);
137        // If put fails the cache will delete the FBO
138        caches.fboCache.put(fbo);
139        fbo = 0;
140    }
141}
142
143void Layer::setPaint(const SkPaint* paint) {
144    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
145    setColorFilter((paint) ? paint->getColorFilter() : NULL);
146}
147
148void Layer::setColorFilter(SkColorFilter* filter) {
149    SkRefCnt_SafeAssign(colorFilter, filter);
150}
151
152void Layer::bindTexture() const {
153    if (texture.id) {
154        caches.bindTexture(renderTarget, texture.id);
155    }
156}
157
158void Layer::bindStencilRenderBuffer() const {
159    if (stencil) {
160        stencil->bind();
161    }
162}
163
164void Layer::generateTexture() {
165    if (!texture.id) {
166        glGenTextures(1, &texture.id);
167    }
168}
169
170void Layer::deleteTexture() {
171    if (texture.id) {
172        texture.deleteTexture();
173        texture.id = 0;
174    }
175}
176
177void Layer::clearTexture() {
178    texture.id = 0;
179}
180
181void Layer::allocateTexture() {
182#if DEBUG_LAYERS
183    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
184#endif
185    if (texture.id) {
186        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
187        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
188                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
189    }
190}
191
192void Layer::defer() {
193    const float width = layer.getWidth();
194    const float height = layer.getHeight();
195
196    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
197            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
198        dirtyRect.set(0, 0, width, height);
199    }
200
201    delete deferredList;
202    deferredList = new DeferredDisplayList(dirtyRect);
203
204    DeferStateStruct deferredState(*deferredList, *renderer,
205            RenderNode::kReplayFlag_ClipChildren);
206
207    renderer->initViewport(width, height);
208    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
209            dirtyRect.right, dirtyRect.bottom, !isBlend());
210
211    displayList->computeOrdering();
212    displayList->deferNodeTree(deferredState);
213
214    deferredUpdateScheduled = false;
215}
216
217void Layer::cancelDefer() {
218    displayList = NULL;
219    deferredUpdateScheduled = false;
220    if (deferredList) {
221        delete deferredList;
222        deferredList = NULL;
223    }
224}
225
226void Layer::flush() {
227    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
228    if (deferredList && renderer) {
229        renderer->setViewport(layer.getWidth(), layer.getHeight());
230        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
231                !isBlend());
232
233        deferredList->flush(*renderer, dirtyRect);
234
235        renderer->finish();
236
237        dirtyRect.setEmpty();
238        displayList = NULL;
239    }
240}
241
242void Layer::render() {
243    renderer->setViewport(layer.getWidth(), layer.getHeight());
244    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
245            !isBlend());
246
247    renderer->drawDisplayList(displayList, dirtyRect, RenderNode::kReplayFlag_ClipChildren);
248
249    renderer->finish();
250
251    dirtyRect.setEmpty();
252
253    deferredUpdateScheduled = false;
254    displayList = NULL;
255}
256
257}; // namespace uirenderer
258}; // namespace android
259