Layer.cpp revision ec4cefc152749f9805d3a971a4a395687b5a3831 
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 "RenderState.h"
24#include "Layer.h"
25#include "LayerRenderer.h"
26#include "OpenGLRenderer.h"
27#include "RenderNode.h"
28
29namespace android {
30namespace uirenderer {
31
32Layer::Layer(RenderState& renderState, const uint32_t layerWidth, const uint32_t layerHeight)
33        : caches(Caches::getInstance())
34        , renderState(renderState)
35        , texture(caches) {
36    mesh = NULL;
37    meshElementCount = 0;
38    cacheable = true;
39    dirty = false;
40    textureLayer = false;
41    renderTarget = GL_TEXTURE_2D;
42    texture.width = layerWidth;
43    texture.height = layerHeight;
44    colorFilter = NULL;
45    deferredUpdateScheduled = false;
46    renderer = NULL;
47    renderNode = NULL;
48    fbo = 0;
49    stencil = NULL;
50    debugDrawUpdate = false;
51    hasDrawnSinceUpdate = false;
52    forceFilter = false;
53    deferredList = NULL;
54    convexMask = NULL;
55    caches.resourceCache.incrementRefcount(this);
56}
57
58Layer::~Layer() {
59    SkSafeUnref(colorFilter);
60    removeFbo();
61    deleteTexture();
62
63    delete[] mesh;
64    delete deferredList;
65    delete renderer;
66}
67
68uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
69    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
70}
71
72uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
73    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
74}
75
76void Layer::requireRenderer() {
77    if (!renderer) {
78        renderer = new LayerRenderer(renderState, this);
79        renderer->initProperties();
80    }
81}
82
83bool Layer::resize(const uint32_t width, const uint32_t height) {
84    uint32_t desiredWidth = computeIdealWidth(width);
85    uint32_t desiredHeight = computeIdealWidth(height);
86
87    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
88        return true;
89    }
90
91    ATRACE_NAME("resizeLayer");
92
93    const uint32_t maxTextureSize = caches.maxTextureSize;
94    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
95        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
96                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
97        return false;
98    }
99
100    uint32_t oldWidth = getWidth();
101    uint32_t oldHeight = getHeight();
102
103    setSize(desiredWidth, desiredHeight);
104
105    if (fbo) {
106        caches.activeTexture(0);
107        bindTexture();
108        allocateTexture();
109
110        if (glGetError() != GL_NO_ERROR) {
111            setSize(oldWidth, oldHeight);
112            return false;
113        }
114    }
115
116    if (stencil) {
117        stencil->bind();
118        stencil->resize(desiredWidth, desiredHeight);
119
120        if (glGetError() != GL_NO_ERROR) {
121            setSize(oldWidth, oldHeight);
122            return false;
123        }
124    }
125
126    return true;
127}
128
129void Layer::removeFbo(bool flush) {
130    if (stencil) {
131        GLuint previousFbo = renderState.getFramebuffer();
132        renderState.bindFramebuffer(fbo);
133        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
134        renderState.bindFramebuffer(previousFbo);
135
136        caches.renderBufferCache.put(stencil);
137        stencil = NULL;
138    }
139
140    if (fbo) {
141        if (flush) LayerRenderer::flushLayer(renderState, this);
142        // If put fails the cache will delete the FBO
143        caches.fboCache.put(fbo);
144        fbo = 0;
145    }
146}
147
148void Layer::updateDeferred(RenderNode* renderNode, int left, int top, int right, int bottom) {
149    requireRenderer();
150    this->renderNode = renderNode;
151    const Rect r(left, top, right, bottom);
152    dirtyRect.unionWith(r);
153    deferredUpdateScheduled = true;
154}
155
156void Layer::setPaint(const SkPaint* paint) {
157    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
158    setColorFilter((paint) ? paint->getColorFilter() : NULL);
159}
160
161void Layer::setColorFilter(SkColorFilter* filter) {
162    SkRefCnt_SafeAssign(colorFilter, filter);
163}
164
165void Layer::bindTexture() const {
166    if (texture.id) {
167        caches.bindTexture(renderTarget, texture.id);
168    }
169}
170
171void Layer::bindStencilRenderBuffer() const {
172    if (stencil) {
173        stencil->bind();
174    }
175}
176
177void Layer::generateTexture() {
178    if (!texture.id) {
179        glGenTextures(1, &texture.id);
180    }
181}
182
183void Layer::deleteTexture() {
184    if (texture.id) {
185        texture.deleteTexture();
186        texture.id = 0;
187    }
188}
189
190void Layer::clearTexture() {
191    caches.unbindTexture(texture.id);
192    texture.id = 0;
193}
194
195void Layer::allocateTexture() {
196#if DEBUG_LAYERS
197    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
198#endif
199    if (texture.id) {
200        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
201        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
202                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
203    }
204}
205
206void Layer::defer() {
207    const float width = layer.getWidth();
208    const float height = layer.getHeight();
209
210    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
211            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
212        dirtyRect.set(0, 0, width, height);
213    }
214
215    delete deferredList;
216    deferredList = new DeferredDisplayList(dirtyRect);
217
218    DeferStateStruct deferredState(*deferredList, *renderer,
219            RenderNode::kReplayFlag_ClipChildren);
220
221    renderer->setViewport(width, height);
222    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
223            dirtyRect.right, dirtyRect.bottom, !isBlend());
224
225    renderNode->computeOrdering();
226    renderNode->defer(deferredState, 0);
227
228    deferredUpdateScheduled = false;
229}
230
231void Layer::cancelDefer() {
232    renderNode = NULL;
233    deferredUpdateScheduled = false;
234    if (deferredList) {
235        delete deferredList;
236        deferredList = NULL;
237    }
238}
239
240void Layer::flush() {
241    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
242    if (deferredList && renderer) {
243        renderer->setViewport(layer.getWidth(), layer.getHeight());
244        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
245                !isBlend());
246
247        deferredList->flush(*renderer, dirtyRect);
248
249        renderer->finish();
250
251        dirtyRect.setEmpty();
252        renderNode = NULL;
253    }
254}
255
256void Layer::render() {
257    renderer->setViewport(layer.getWidth(), layer.getHeight());
258    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
259            !isBlend());
260
261    renderer->drawRenderNode(renderNode.get(), dirtyRect, RenderNode::kReplayFlag_ClipChildren);
262
263    renderer->finish();
264
265    dirtyRect.setEmpty();
266
267    deferredUpdateScheduled = false;
268    renderNode = NULL;
269}
270
271}; // namespace uirenderer
272}; // namespace android
273