Layer.cpp revision 9757ac0b9d62f6aea5e47cfb375f445c78bb7897 
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    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}
62
63uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
64    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
65}
66
67uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
68    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
69}
70
71bool Layer::resize(const uint32_t width, const uint32_t height) {
72    uint32_t desiredWidth = computeIdealWidth(width);
73    uint32_t desiredHeight = computeIdealWidth(height);
74
75    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
76        return true;
77    }
78
79    const uint32_t maxTextureSize = caches.maxTextureSize;
80    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
81        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
82                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
83        return false;
84    }
85
86    uint32_t oldWidth = getWidth();
87    uint32_t oldHeight = getHeight();
88
89    setSize(desiredWidth, desiredHeight);
90
91    if (fbo) {
92        caches.activeTexture(0);
93        bindTexture();
94        allocateTexture();
95
96        if (glGetError() != GL_NO_ERROR) {
97            setSize(oldWidth, oldHeight);
98            return false;
99        }
100    }
101
102    if (stencil) {
103        stencil->bind();
104        stencil->resize(desiredWidth, desiredHeight);
105
106        if (glGetError() != GL_NO_ERROR) {
107            setSize(oldWidth, oldHeight);
108            return false;
109        }
110    }
111
112    return true;
113}
114
115void Layer::removeFbo(bool flush) {
116    if (stencil) {
117        GLuint previousFbo;
118        glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
119        if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, fbo);
120        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
121        if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
122
123        caches.renderBufferCache.put(stencil);
124        stencil = NULL;
125    }
126
127    if (fbo) {
128        if (flush) LayerRenderer::flushLayer(this);
129        // If put fails the cache will delete the FBO
130        caches.fboCache.put(fbo);
131        fbo = 0;
132    }
133}
134
135void Layer::setPaint(const SkPaint* paint) {
136    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
137    setColorFilter((paint) ? paint->getColorFilter() : NULL);
138}
139
140void Layer::setColorFilter(SkColorFilter* filter) {
141    SkRefCnt_SafeAssign(colorFilter, filter);
142}
143
144void Layer::bindTexture() const {
145    if (texture.id) {
146        caches.bindTexture(renderTarget, texture.id);
147    }
148}
149
150void Layer::bindStencilRenderBuffer() const {
151    if (stencil) {
152        stencil->bind();
153    }
154}
155
156void Layer::generateTexture() {
157    if (!texture.id) {
158        glGenTextures(1, &texture.id);
159    }
160}
161
162void Layer::deleteTexture() {
163    if (texture.id) {
164        texture.deleteTexture();
165        texture.id = 0;
166    }
167}
168
169void Layer::clearTexture() {
170    texture.id = 0;
171}
172
173void Layer::allocateTexture() {
174#if DEBUG_LAYERS
175    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
176#endif
177    if (texture.id) {
178        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
179        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
180                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
181    }
182}
183
184void Layer::defer() {
185    const float width = layer.getWidth();
186    const float height = layer.getHeight();
187
188    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
189            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
190        dirtyRect.set(0, 0, width, height);
191    }
192
193    delete deferredList;
194    deferredList = new DeferredDisplayList(dirtyRect);
195
196    DeferStateStruct deferredState(*deferredList, *renderer,
197            DisplayList::kReplayFlag_ClipChildren);
198
199    renderer->initViewport(width, height);
200    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
201            dirtyRect.right, dirtyRect.bottom, !isBlend());
202
203    displayList->computeOrdering();
204    displayList->defer(deferredState, 0);
205
206    deferredUpdateScheduled = false;
207}
208
209void Layer::cancelDefer() {
210    renderer = NULL;
211    displayList = NULL;
212    deferredUpdateScheduled = false;
213    if (deferredList) {
214        delete deferredList;
215        deferredList = NULL;
216    }
217}
218
219void Layer::flush() {
220    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
221    if (deferredList && renderer) {
222        renderer->setViewport(layer.getWidth(), layer.getHeight());
223        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
224                !isBlend());
225
226        deferredList->flush(*renderer, dirtyRect);
227
228        renderer->finish();
229        renderer = NULL;
230
231        dirtyRect.setEmpty();
232        displayList = NULL;
233    }
234}
235
236void Layer::render() {
237    renderer->setViewport(layer.getWidth(), layer.getHeight());
238    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
239            !isBlend());
240
241    renderer->drawDisplayList(displayList, dirtyRect, DisplayList::kReplayFlag_ClipChildren);
242
243    renderer->finish();
244    renderer = NULL;
245
246    dirtyRect.setEmpty();
247
248    deferredUpdateScheduled = false;
249    displayList = NULL;
250}
251
252}; // namespace uirenderer
253}; // namespace android
254