Layer.cpp revision 69e5adffb19135d51bde8e458f4907d7265f3e23 
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    rendererLightPosDirty = true;
57}
58
59Layer::~Layer() {
60    SkSafeUnref(colorFilter);
61    removeFbo();
62    deleteTexture();
63
64    delete[] mesh;
65    delete deferredList;
66    delete renderer;
67}
68
69uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
70    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
71}
72
73uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
74    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
75}
76
77void Layer::requireRenderer() {
78    if (!renderer) {
79        renderer = new LayerRenderer(renderState, this);
80        renderer->initProperties();
81    }
82}
83
84void Layer::updateLightPosFromRenderer(const OpenGLRenderer& rootRenderer) {
85    if (renderer && rendererLightPosDirty) {
86        // re-init renderer's light position, based upon last cached location in window
87        Vector3 lightPos = rootRenderer.getLightCenter();
88        cachedInvTransformInWindow.mapPoint3d(lightPos);
89        renderer->initLight(lightPos, rootRenderer.getLightRadius(),
90                rootRenderer.getAmbientShadowAlpha(), rootRenderer.getSpotShadowAlpha());
91        rendererLightPosDirty = false;
92    }
93}
94
95bool Layer::resize(const uint32_t width, const uint32_t height) {
96    uint32_t desiredWidth = computeIdealWidth(width);
97    uint32_t desiredHeight = computeIdealWidth(height);
98
99    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
100        return true;
101    }
102
103    ATRACE_NAME("resizeLayer");
104
105    const uint32_t maxTextureSize = caches.maxTextureSize;
106    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
107        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
108                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
109        return false;
110    }
111
112    uint32_t oldWidth = getWidth();
113    uint32_t oldHeight = getHeight();
114
115    setSize(desiredWidth, desiredHeight);
116
117    if (fbo) {
118        caches.activeTexture(0);
119        bindTexture();
120        allocateTexture();
121
122        if (glGetError() != GL_NO_ERROR) {
123            setSize(oldWidth, oldHeight);
124            return false;
125        }
126    }
127
128    if (stencil) {
129        stencil->bind();
130        stencil->resize(desiredWidth, desiredHeight);
131
132        if (glGetError() != GL_NO_ERROR) {
133            setSize(oldWidth, oldHeight);
134            return false;
135        }
136    }
137
138    return true;
139}
140
141void Layer::removeFbo(bool flush) {
142    if (stencil) {
143        GLuint previousFbo = renderState.getFramebuffer();
144        renderState.bindFramebuffer(fbo);
145        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
146        renderState.bindFramebuffer(previousFbo);
147
148        caches.renderBufferCache.put(stencil);
149        stencil = NULL;
150    }
151
152    if (fbo) {
153        if (flush) LayerRenderer::flushLayer(renderState, this);
154        // If put fails the cache will delete the FBO
155        caches.fboCache.put(fbo);
156        fbo = 0;
157    }
158}
159
160void Layer::updateDeferred(RenderNode* renderNode, int left, int top, int right, int bottom) {
161    requireRenderer();
162    this->renderNode = renderNode;
163    const Rect r(left, top, right, bottom);
164    dirtyRect.unionWith(r);
165    deferredUpdateScheduled = true;
166}
167
168void Layer::setPaint(const SkPaint* paint) {
169    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
170    setColorFilter((paint) ? paint->getColorFilter() : NULL);
171}
172
173void Layer::setColorFilter(SkColorFilter* filter) {
174    SkRefCnt_SafeAssign(colorFilter, filter);
175}
176
177void Layer::bindTexture() const {
178    if (texture.id) {
179        caches.bindTexture(renderTarget, texture.id);
180    }
181}
182
183void Layer::bindStencilRenderBuffer() const {
184    if (stencil) {
185        stencil->bind();
186    }
187}
188
189void Layer::generateTexture() {
190    if (!texture.id) {
191        glGenTextures(1, &texture.id);
192    }
193}
194
195void Layer::deleteTexture() {
196    if (texture.id) {
197        texture.deleteTexture();
198        texture.id = 0;
199    }
200}
201
202void Layer::clearTexture() {
203    caches.unbindTexture(texture.id);
204    texture.id = 0;
205}
206
207void Layer::allocateTexture() {
208#if DEBUG_LAYERS
209    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
210#endif
211    if (texture.id) {
212        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
213        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
214                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
215    }
216}
217
218void Layer::defer(const OpenGLRenderer& rootRenderer) {
219    updateLightPosFromRenderer(rootRenderer);
220    const float width = layer.getWidth();
221    const float height = layer.getHeight();
222
223    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
224            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
225        dirtyRect.set(0, 0, width, height);
226    }
227
228    delete deferredList;
229    deferredList = new DeferredDisplayList(dirtyRect);
230
231    DeferStateStruct deferredState(*deferredList, *renderer,
232            RenderNode::kReplayFlag_ClipChildren);
233
234    renderer->setViewport(width, height);
235    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
236            dirtyRect.right, dirtyRect.bottom, !isBlend());
237
238    renderNode->computeOrdering();
239    renderNode->defer(deferredState, 0);
240
241    deferredUpdateScheduled = false;
242}
243
244void Layer::cancelDefer() {
245    renderNode = NULL;
246    deferredUpdateScheduled = false;
247    if (deferredList) {
248        delete deferredList;
249        deferredList = NULL;
250    }
251}
252
253void Layer::flush() {
254    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
255    if (deferredList && renderer) {
256        renderer->setViewport(layer.getWidth(), layer.getHeight());
257        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
258                !isBlend());
259
260        deferredList->flush(*renderer, dirtyRect);
261
262        renderer->finish();
263
264        dirtyRect.setEmpty();
265        renderNode = NULL;
266    }
267}
268
269void Layer::render(const OpenGLRenderer& rootRenderer) {
270    updateLightPosFromRenderer(rootRenderer);
271    renderer->setViewport(layer.getWidth(), layer.getHeight());
272    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
273            !isBlend());
274
275    renderer->drawRenderNode(renderNode.get(), dirtyRect, RenderNode::kReplayFlag_ClipChildren);
276
277    renderer->finish();
278
279    dirtyRect.setEmpty();
280
281    deferredUpdateScheduled = false;
282    renderNode = NULL;
283}
284
285}; // namespace uirenderer
286}; // namespace android
287