Layer.cpp revision 65fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6 
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, const uint32_t layerWidth, const 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    mesh = nullptr;
50    meshElementCount = 0;
51    cacheable = true;
52    dirty = false;
53    renderTarget = GL_TEXTURE_2D;
54    texture.width = layerWidth;
55    texture.height = layerHeight;
56    colorFilter = nullptr;
57    deferredUpdateScheduled = false;
58    renderNode = nullptr;
59    fbo = 0;
60    stencil = nullptr;
61    debugDrawUpdate = false;
62    hasDrawnSinceUpdate = false;
63    forceFilter = false;
64    convexMask = nullptr;
65    rendererLightPosDirty = true;
66    wasBuildLayered = false;
67    renderState.registerLayer(this);
68}
69
70Layer::~Layer() {
71    renderState.requireGLContext();
72    renderState.unregisterLayer(this);
73    SkSafeUnref(colorFilter);
74    removeFbo();
75    deleteTexture();
76
77    delete[] mesh;
78}
79
80uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
81    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
82}
83
84uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
85    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
86}
87
88void Layer::requireRenderer() {
89    if (!renderer) {
90        renderer.reset(new LayerRenderer(renderState, this));
91        renderer->initProperties();
92    }
93}
94
95void Layer::updateLightPosFromRenderer(const OpenGLRenderer& rootRenderer) {
96    if (renderer && rendererLightPosDirty) {
97        // re-init renderer's light position, based upon last cached location in window
98        Vector3 lightPos = rootRenderer.getLightCenter();
99        cachedInvTransformInWindow.mapPoint3d(lightPos);
100        renderer->initLight(lightPos, rootRenderer.getLightRadius(),
101                rootRenderer.getAmbientShadowAlpha(), rootRenderer.getSpotShadowAlpha());
102        rendererLightPosDirty = false;
103    }
104}
105
106bool Layer::resize(const uint32_t width, const uint32_t height) {
107    uint32_t desiredWidth = computeIdealWidth(width);
108    uint32_t desiredHeight = computeIdealWidth(height);
109
110    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
111        return true;
112    }
113
114    ATRACE_NAME("resizeLayer");
115
116    const uint32_t maxTextureSize = caches.maxTextureSize;
117    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
118        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
119                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
120        return false;
121    }
122
123    uint32_t oldWidth = getWidth();
124    uint32_t oldHeight = getHeight();
125
126    setSize(desiredWidth, desiredHeight);
127
128    if (fbo) {
129        caches.activeTexture(0);
130        bindTexture();
131        allocateTexture();
132
133        if (glGetError() != GL_NO_ERROR) {
134            setSize(oldWidth, oldHeight);
135            return false;
136        }
137    }
138
139    if (stencil) {
140        stencil->bind();
141        stencil->resize(desiredWidth, desiredHeight);
142
143        if (glGetError() != GL_NO_ERROR) {
144            setSize(oldWidth, oldHeight);
145            return false;
146        }
147    }
148
149    return true;
150}
151
152void Layer::removeFbo(bool flush) {
153    if (stencil) {
154        GLuint previousFbo = renderState.getFramebuffer();
155        renderState.bindFramebuffer(fbo);
156        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
157        renderState.bindFramebuffer(previousFbo);
158
159        caches.renderBufferCache.put(stencil);
160        stencil = nullptr;
161    }
162
163    if (fbo) {
164        if (flush) LayerRenderer::flushLayer(renderState, this);
165        // If put fails the cache will delete the FBO
166        caches.fboCache.put(fbo);
167        fbo = 0;
168    }
169}
170
171void Layer::updateDeferred(RenderNode* renderNode, int left, int top, int right, int bottom) {
172    requireRenderer();
173    this->renderNode = renderNode;
174    const Rect r(left, top, right, bottom);
175    dirtyRect.unionWith(r);
176    deferredUpdateScheduled = true;
177}
178
179void Layer::setPaint(const SkPaint* paint) {
180    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
181    setColorFilter((paint) ? paint->getColorFilter() : nullptr);
182}
183
184void Layer::setColorFilter(SkColorFilter* filter) {
185    SkRefCnt_SafeAssign(colorFilter, filter);
186}
187
188void Layer::bindTexture() const {
189    if (texture.id) {
190        caches.bindTexture(renderTarget, texture.id);
191    }
192}
193
194void Layer::bindStencilRenderBuffer() const {
195    if (stencil) {
196        stencil->bind();
197    }
198}
199
200void Layer::generateTexture() {
201    if (!texture.id) {
202        glGenTextures(1, &texture.id);
203    }
204}
205
206void Layer::deleteTexture() {
207    if (texture.id) {
208        texture.deleteTexture();
209        texture.id = 0;
210    }
211}
212
213void Layer::clearTexture() {
214    caches.unbindTexture(texture.id);
215    texture.id = 0;
216}
217
218void Layer::allocateTexture() {
219#if DEBUG_LAYERS
220    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
221#endif
222    if (texture.id) {
223        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
224        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
225                GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
226    }
227}
228
229void Layer::defer(const OpenGLRenderer& rootRenderer) {
230    ATRACE_LAYER_WORK("Optimize");
231
232    updateLightPosFromRenderer(rootRenderer);
233    const float width = layer.getWidth();
234    const float height = layer.getHeight();
235
236    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
237            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
238        dirtyRect.set(0, 0, width, height);
239    }
240
241    deferredList.reset(new DeferredDisplayList(dirtyRect));
242
243    DeferStateStruct deferredState(*deferredList, *renderer,
244            RenderNode::kReplayFlag_ClipChildren);
245
246    renderer->setViewport(width, height);
247    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
248            dirtyRect.right, dirtyRect.bottom, !isBlend());
249
250    renderNode->computeOrdering();
251    renderNode->defer(deferredState, 0);
252
253    deferredUpdateScheduled = false;
254}
255
256void Layer::cancelDefer() {
257    renderNode = nullptr;
258    deferredUpdateScheduled = false;
259    deferredList.release();
260}
261
262void Layer::flush() {
263    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
264    if (deferredList && renderer) {
265        ATRACE_LAYER_WORK("Issue");
266        renderer->startMark((renderNode.get() != nullptr) ? renderNode->getName() : "Layer");
267
268        renderer->setViewport(layer.getWidth(), layer.getHeight());
269        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
270                !isBlend());
271
272        deferredList->flush(*renderer, dirtyRect);
273
274        renderer->finish();
275
276        dirtyRect.setEmpty();
277        renderNode = nullptr;
278
279        renderer->endMark();
280    }
281}
282
283void Layer::render(const OpenGLRenderer& rootRenderer) {
284    ATRACE_LAYER_WORK("Direct-Issue");
285
286    updateLightPosFromRenderer(rootRenderer);
287    renderer->setViewport(layer.getWidth(), layer.getHeight());
288    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
289            !isBlend());
290
291    renderer->drawRenderNode(renderNode.get(), dirtyRect, RenderNode::kReplayFlag_ClipChildren);
292
293    renderer->finish();
294
295    dirtyRect.setEmpty();
296
297    deferredUpdateScheduled = false;
298    renderNode = nullptr;
299}
300
301void Layer::postDecStrong() {
302    renderState.postDecStrong(this);
303}
304
305}; // namespace uirenderer
306}; // namespace android
307