Layer.cpp revision 087bc0c14bdccf7c258dce0cdef46a69a839b427 
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::updateDeferred(RenderNode* displayList,
144        int left, int top, int right, int bottom) {
145    requireRenderer();
146    this->displayList = displayList;
147    const Rect r(left, top, right, bottom);
148    dirtyRect.unionWith(r);
149    deferredUpdateScheduled = true;
150}
151
152void Layer::setPaint(const SkPaint* paint) {
153    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
154    setColorFilter((paint) ? paint->getColorFilter() : NULL);
155}
156
157void Layer::setColorFilter(SkColorFilter* filter) {
158    SkRefCnt_SafeAssign(colorFilter, filter);
159}
160
161void Layer::bindTexture() const {
162    if (texture.id) {
163        caches.bindTexture(renderTarget, texture.id);
164    }
165}
166
167void Layer::bindStencilRenderBuffer() const {
168    if (stencil) {
169        stencil->bind();
170    }
171}
172
173void Layer::generateTexture() {
174    if (!texture.id) {
175        glGenTextures(1, &texture.id);
176    }
177}
178
179void Layer::deleteTexture() {
180    if (texture.id) {
181        texture.deleteTexture();
182        texture.id = 0;
183    }
184}
185
186void Layer::clearTexture() {
187    texture.id = 0;
188}
189
190void Layer::allocateTexture() {
191#if DEBUG_LAYERS
192    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
193#endif
194    if (texture.id) {
195        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
196        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
197                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
198    }
199}
200
201void Layer::defer() {
202    const float width = layer.getWidth();
203    const float height = layer.getHeight();
204
205    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
206            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
207        dirtyRect.set(0, 0, width, height);
208    }
209
210    delete deferredList;
211    deferredList = new DeferredDisplayList(dirtyRect);
212
213    DeferStateStruct deferredState(*deferredList, *renderer,
214            RenderNode::kReplayFlag_ClipChildren);
215
216    renderer->initViewport(width, height);
217    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
218            dirtyRect.right, dirtyRect.bottom, !isBlend());
219
220    displayList->computeOrdering();
221    displayList->deferNodeTree(deferredState);
222
223    deferredUpdateScheduled = false;
224}
225
226void Layer::cancelDefer() {
227    displayList = NULL;
228    deferredUpdateScheduled = false;
229    if (deferredList) {
230        delete deferredList;
231        deferredList = NULL;
232    }
233}
234
235void Layer::flush() {
236    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
237    if (deferredList && renderer) {
238        renderer->setViewport(layer.getWidth(), layer.getHeight());
239        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
240                !isBlend());
241
242        deferredList->flush(*renderer, dirtyRect);
243
244        renderer->finish();
245
246        dirtyRect.setEmpty();
247        displayList = NULL;
248    }
249}
250
251void Layer::render() {
252    renderer->setViewport(layer.getWidth(), layer.getHeight());
253    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
254            !isBlend());
255
256    renderer->drawDisplayList(displayList.get(), dirtyRect, RenderNode::kReplayFlag_ClipChildren);
257
258    renderer->finish();
259
260    dirtyRect.setEmpty();
261
262    deferredUpdateScheduled = false;
263    displayList = NULL;
264}
265
266}; // namespace uirenderer
267}; // namespace android
268