Layer.cpp revision d41c4d8c732095ae99c955b6b82f7306633004b1 
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#include "RenderState.h"
28#include "utils/TraceUtils.h"
29
30#define ATRACE_LAYER_WORK(label) \
31    ATRACE_FORMAT("%s HW Layer DisplayList %s %ux%u", \
32            label, \
33            (renderNode.get() != NULL) ? renderNode->getName() : "", \
34            getWidth(), getHeight())
35
36namespace android {
37namespace uirenderer {
38
39Layer::Layer(Type layerType, RenderState& renderState, const uint32_t layerWidth, const uint32_t layerHeight)
40        : state(kState_Uncached)
41        , caches(Caches::getInstance())
42        , renderState(renderState)
43        , texture(caches)
44        , type(layerType) {
45    // TODO: This is a violation of Android's typical ref counting, but it
46    // preserves the old inc/dec ref locations. This should be changed...
47    incStrong(nullptr);
48    mesh = nullptr;
49    meshElementCount = 0;
50    cacheable = true;
51    dirty = false;
52    renderTarget = GL_TEXTURE_2D;
53    texture.width = layerWidth;
54    texture.height = layerHeight;
55    colorFilter = nullptr;
56    deferredUpdateScheduled = false;
57    renderNode = nullptr;
58    fbo = 0;
59    stencil = nullptr;
60    debugDrawUpdate = false;
61    hasDrawnSinceUpdate = false;
62    forceFilter = false;
63    convexMask = nullptr;
64    rendererLightPosDirty = true;
65    wasBuildLayered = false;
66    renderState.registerLayer(this);
67}
68
69Layer::~Layer() {
70    renderState.requireGLContext();
71    renderState.unregisterLayer(this);
72    SkSafeUnref(colorFilter);
73    removeFbo();
74    deleteTexture();
75
76    delete[] mesh;
77}
78
79uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
80    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
81}
82
83uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
84    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
85}
86
87void Layer::requireRenderer() {
88    if (!renderer) {
89        renderer.reset(new LayerRenderer(renderState, this));
90        renderer->initProperties();
91    }
92}
93
94void Layer::updateLightPosFromRenderer(const OpenGLRenderer& rootRenderer) {
95    if (renderer && rendererLightPosDirty) {
96        // re-init renderer's light position, based upon last cached location in window
97        Vector3 lightPos = rootRenderer.getLightCenter();
98        cachedInvTransformInWindow.mapPoint3d(lightPos);
99        renderer->initLight(lightPos, rootRenderer.getLightRadius(),
100                rootRenderer.getAmbientShadowAlpha(), rootRenderer.getSpotShadowAlpha());
101        rendererLightPosDirty = false;
102    }
103}
104
105bool Layer::resize(const uint32_t width, const uint32_t height) {
106    uint32_t desiredWidth = computeIdealWidth(width);
107    uint32_t desiredHeight = computeIdealWidth(height);
108
109    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
110        return true;
111    }
112
113    ATRACE_NAME("resizeLayer");
114
115    const uint32_t maxTextureSize = caches.maxTextureSize;
116    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
117        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
118                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
119        return false;
120    }
121
122    uint32_t oldWidth = getWidth();
123    uint32_t oldHeight = getHeight();
124
125    setSize(desiredWidth, desiredHeight);
126
127    if (fbo) {
128        caches.activeTexture(0);
129        bindTexture();
130        allocateTexture();
131
132        if (glGetError() != GL_NO_ERROR) {
133            setSize(oldWidth, oldHeight);
134            return false;
135        }
136    }
137
138    if (stencil) {
139        stencil->bind();
140        stencil->resize(desiredWidth, desiredHeight);
141
142        if (glGetError() != GL_NO_ERROR) {
143            setSize(oldWidth, oldHeight);
144            return false;
145        }
146    }
147
148    return true;
149}
150
151void Layer::removeFbo(bool flush) {
152    if (stencil) {
153        GLuint previousFbo = renderState.getFramebuffer();
154        renderState.bindFramebuffer(fbo);
155        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
156        renderState.bindFramebuffer(previousFbo);
157
158        caches.renderBufferCache.put(stencil);
159        stencil = nullptr;
160    }
161
162    if (fbo) {
163        if (flush) LayerRenderer::flushLayer(renderState, this);
164        // If put fails the cache will delete the FBO
165        caches.fboCache.put(fbo);
166        fbo = 0;
167    }
168}
169
170void Layer::updateDeferred(RenderNode* renderNode, int left, int top, int right, int bottom) {
171    requireRenderer();
172    this->renderNode = renderNode;
173    const Rect r(left, top, right, bottom);
174    dirtyRect.unionWith(r);
175    deferredUpdateScheduled = true;
176}
177
178void Layer::setPaint(const SkPaint* paint) {
179    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
180    setColorFilter((paint) ? paint->getColorFilter() : nullptr);
181}
182
183void Layer::setColorFilter(SkColorFilter* filter) {
184    SkRefCnt_SafeAssign(colorFilter, filter);
185}
186
187void Layer::bindTexture() const {
188    if (texture.id) {
189        caches.bindTexture(renderTarget, texture.id);
190    }
191}
192
193void Layer::bindStencilRenderBuffer() const {
194    if (stencil) {
195        stencil->bind();
196    }
197}
198
199void Layer::generateTexture() {
200    if (!texture.id) {
201        glGenTextures(1, &texture.id);
202    }
203}
204
205void Layer::deleteTexture() {
206    if (texture.id) {
207        texture.deleteTexture();
208        texture.id = 0;
209    }
210}
211
212void Layer::clearTexture() {
213    caches.unbindTexture(texture.id);
214    texture.id = 0;
215}
216
217void Layer::allocateTexture() {
218#if DEBUG_LAYERS
219    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
220#endif
221    if (texture.id) {
222        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
223        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
224                GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
225    }
226}
227
228void Layer::defer(const OpenGLRenderer& rootRenderer) {
229    ATRACE_LAYER_WORK("Optimize");
230
231    updateLightPosFromRenderer(rootRenderer);
232    const float width = layer.getWidth();
233    const float height = layer.getHeight();
234
235    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
236            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
237        dirtyRect.set(0, 0, width, height);
238    }
239
240    deferredList.reset(new DeferredDisplayList(dirtyRect));
241
242    DeferStateStruct deferredState(*deferredList, *renderer,
243            RenderNode::kReplayFlag_ClipChildren);
244
245    renderer->setViewport(width, height);
246    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
247            dirtyRect.right, dirtyRect.bottom, !isBlend());
248
249    renderNode->computeOrdering();
250    renderNode->defer(deferredState, 0);
251
252    deferredUpdateScheduled = false;
253}
254
255void Layer::cancelDefer() {
256    renderNode = nullptr;
257    deferredUpdateScheduled = false;
258    deferredList.release();
259}
260
261void Layer::flush() {
262    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
263    if (deferredList && renderer) {
264        ATRACE_LAYER_WORK("Issue");
265        renderer->startMark((renderNode.get() != nullptr) ? renderNode->getName() : "Layer");
266
267        renderer->setViewport(layer.getWidth(), layer.getHeight());
268        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
269                !isBlend());
270
271        deferredList->flush(*renderer, dirtyRect);
272
273        renderer->finish();
274
275        dirtyRect.setEmpty();
276        renderNode = nullptr;
277
278        renderer->endMark();
279    }
280}
281
282void Layer::render(const OpenGLRenderer& rootRenderer) {
283    ATRACE_LAYER_WORK("Direct-Issue");
284
285    updateLightPosFromRenderer(rootRenderer);
286    renderer->setViewport(layer.getWidth(), layer.getHeight());
287    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
288            !isBlend());
289
290    renderer->drawRenderNode(renderNode.get(), dirtyRect, RenderNode::kReplayFlag_ClipChildren);
291
292    renderer->finish();
293
294    dirtyRect.setEmpty();
295
296    deferredUpdateScheduled = false;
297    renderNode = nullptr;
298}
299
300void Layer::postDecStrong() {
301    renderState.postDecStrong(this);
302}
303
304}; // namespace uirenderer
305}; // namespace android
306