Layer.cpp revision 441cc421b51377ec27bf97ed690c63aa5509ae90 
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 "Layer.h"
20
21#include "Caches.h"
22#include "DeferredDisplayList.h"
23#include "LayerRenderer.h"
24#include "OpenGLRenderer.h"
25#include "RenderNode.h"
26#include "renderstate/RenderState.h"
27#include "utils/TraceUtils.h"
28
29#include <utils/Log.h>
30
31#define ATRACE_LAYER_WORK(label) \
32    ATRACE_FORMAT("%s HW Layer DisplayList %s %ux%u", \
33            label, \
34            (renderNode.get() != NULL) ? renderNode->getName() : "", \
35            getWidth(), getHeight())
36
37namespace android {
38namespace uirenderer {
39
40Layer::Layer(Type layerType, RenderState& renderState, uint32_t layerWidth, uint32_t layerHeight)
41        : state(kState_Uncached)
42        , caches(Caches::getInstance())
43        , renderState(renderState)
44        , texture(caches)
45        , type(layerType) {
46    // TODO: This is a violation of Android's typical ref counting, but it
47    // preserves the old inc/dec ref locations. This should be changed...
48    incStrong(nullptr);
49    renderTarget = GL_TEXTURE_2D;
50    texture.width = layerWidth;
51    texture.height = layerHeight;
52    renderState.registerLayer(this);
53}
54
55Layer::~Layer() {
56    renderState.unregisterLayer(this);
57    SkSafeUnref(colorFilter);
58
59    if (stencil || fbo || texture.id) {
60        renderState.requireGLContext();
61        removeFbo();
62        deleteTexture();
63    }
64
65    delete[] mesh;
66}
67
68void Layer::onGlContextLost() {
69    removeFbo();
70    deleteTexture();
71}
72
73uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
74    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
75}
76
77uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
78    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
79}
80
81void Layer::requireRenderer() {
82    if (!renderer) {
83        renderer.reset(new LayerRenderer(renderState, this));
84        renderer->initProperties();
85    }
86}
87
88void Layer::updateLightPosFromRenderer(const OpenGLRenderer& rootRenderer) {
89    if (renderer && rendererLightPosDirty) {
90        // re-init renderer's light position, based upon last cached location in window
91        Vector3 lightPos = rootRenderer.getLightCenter();
92        cachedInvTransformInWindow.mapPoint3d(lightPos);
93        renderer->initLight(rootRenderer.getLightRadius(),
94                rootRenderer.getAmbientShadowAlpha(),
95                rootRenderer.getSpotShadowAlpha());
96        renderer->setLightCenter(lightPos);
97        rendererLightPosDirty = false;
98    }
99}
100
101bool Layer::resize(const uint32_t width, const uint32_t height) {
102    uint32_t desiredWidth = computeIdealWidth(width);
103    uint32_t desiredHeight = computeIdealWidth(height);
104
105    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
106        return true;
107    }
108
109    ATRACE_NAME("resizeLayer");
110
111    const uint32_t maxTextureSize = caches.maxTextureSize;
112    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
113        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
114                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
115        return false;
116    }
117
118    uint32_t oldWidth = getWidth();
119    uint32_t oldHeight = getHeight();
120
121    setSize(desiredWidth, desiredHeight);
122
123    if (fbo) {
124        caches.textureState().activateTexture(0);
125        bindTexture();
126        allocateTexture();
127
128        if (glGetError() != GL_NO_ERROR) {
129            setSize(oldWidth, oldHeight);
130            return false;
131        }
132    }
133
134    if (stencil) {
135        stencil->bind();
136        stencil->resize(desiredWidth, desiredHeight);
137
138        if (glGetError() != GL_NO_ERROR) {
139            setSize(oldWidth, oldHeight);
140            return false;
141        }
142    }
143
144    return true;
145}
146
147void Layer::removeFbo(bool flush) {
148    if (stencil) {
149        GLuint previousFbo = renderState.getFramebuffer();
150        renderState.bindFramebuffer(fbo);
151        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
152        renderState.bindFramebuffer(previousFbo);
153
154        caches.renderBufferCache.put(stencil);
155        stencil = nullptr;
156    }
157
158    if (fbo) {
159        if (flush) LayerRenderer::flushLayer(renderState, this);
160        // If put fails the cache will delete the FBO
161        caches.fboCache.put(fbo);
162        fbo = 0;
163    }
164}
165
166void Layer::updateDeferred(RenderNode* renderNode, int left, int top, int right, int bottom) {
167    requireRenderer();
168    this->renderNode = renderNode;
169    const Rect r(left, top, right, bottom);
170    dirtyRect.unionWith(r);
171    deferredUpdateScheduled = true;
172}
173
174void Layer::setPaint(const SkPaint* paint) {
175    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
176    setColorFilter((paint) ? paint->getColorFilter() : nullptr);
177}
178
179void Layer::setColorFilter(SkColorFilter* filter) {
180    SkRefCnt_SafeAssign(colorFilter, filter);
181}
182
183void Layer::bindTexture() const {
184    if (texture.id) {
185        caches.textureState().bindTexture(renderTarget, texture.id);
186    }
187}
188
189void Layer::bindStencilRenderBuffer() const {
190    if (stencil) {
191        stencil->bind();
192    }
193}
194
195void Layer::generateTexture() {
196    if (!texture.id) {
197        glGenTextures(1, &texture.id);
198    }
199}
200
201void Layer::deleteTexture() {
202    if (texture.id) {
203        texture.deleteTexture();
204        texture.id = 0;
205    }
206}
207
208void Layer::clearTexture() {
209    caches.textureState().unbindTexture(texture.id);
210    texture.id = 0;
211}
212
213void Layer::allocateTexture() {
214#if DEBUG_LAYERS
215    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
216#endif
217    if (texture.id) {
218        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
219        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
220                GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
221    }
222}
223
224void Layer::defer(const OpenGLRenderer& rootRenderer) {
225    ATRACE_LAYER_WORK("Optimize");
226
227    updateLightPosFromRenderer(rootRenderer);
228    const float width = layer.getWidth();
229    const float height = layer.getHeight();
230
231    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
232            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
233        dirtyRect.set(0, 0, width, height);
234    }
235
236    deferredList.reset(new DeferredDisplayList(dirtyRect));
237
238    DeferStateStruct deferredState(*deferredList, *renderer,
239            RenderNode::kReplayFlag_ClipChildren);
240
241    renderer->setViewport(width, height);
242    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
243            dirtyRect.right, dirtyRect.bottom, !isBlend());
244
245    renderNode->computeOrdering();
246    renderNode->defer(deferredState, 0);
247
248    deferredUpdateScheduled = false;
249}
250
251void Layer::cancelDefer() {
252    renderNode = nullptr;
253    deferredUpdateScheduled = false;
254    deferredList.reset(nullptr);
255}
256
257void Layer::flush() {
258    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
259    if (deferredList && renderer) {
260        ATRACE_LAYER_WORK("Issue");
261        renderer->startMark((renderNode.get() != nullptr) ? renderNode->getName() : "Layer");
262
263        renderer->setViewport(layer.getWidth(), layer.getHeight());
264        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
265                !isBlend());
266
267        deferredList->flush(*renderer, dirtyRect);
268
269        renderer->finish();
270
271        dirtyRect.setEmpty();
272        renderNode = nullptr;
273
274        renderer->endMark();
275    }
276}
277
278void Layer::render(const OpenGLRenderer& rootRenderer) {
279    ATRACE_LAYER_WORK("Direct-Issue");
280
281    updateLightPosFromRenderer(rootRenderer);
282    renderer->setViewport(layer.getWidth(), layer.getHeight());
283    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
284            !isBlend());
285
286    renderer->drawRenderNode(renderNode.get(), dirtyRect, RenderNode::kReplayFlag_ClipChildren);
287
288    renderer->finish();
289
290    dirtyRect.setEmpty();
291
292    deferredUpdateScheduled = false;
293    renderNode = nullptr;
294}
295
296void Layer::postDecStrong() {
297    renderState.postDecStrong(this);
298}
299
300}; // namespace uirenderer
301}; // namespace android
302