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synced 2024-09-13 09:24:08 -07:00
Split up the LayerRenderer's drawing logic in preparation for exposing it to JNI
This commit is contained in:
Patrick Walton
parent
2acc9c16c8
commit
fdf11e0c13
@ -255,149 +255,13 @@ public class LayerRenderer implements GLSurfaceView.Renderer {
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* Called whenever a new frame is about to be drawn.
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*/
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public void onDrawFrame(GL10 gl) {
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long frameStartTime = SystemClock.uptimeMillis();
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TextureReaper.get().reap();
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TextureGenerator.get().fill();
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LayerController controller = mView.getController();
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RenderContext screenContext = createScreenContext();
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boolean updated = true;
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synchronized (controller) {
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Layer rootLayer = controller.getRoot();
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RenderContext pageContext = createPageContext();
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if (!pageContext.fuzzyEquals(mLastPageContext)) {
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// the viewport or page changed, so show the scrollbars again
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// as per UX decision
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mVertScrollLayer.unfade();
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mHorizScrollLayer.unfade();
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mFadeRunnable.scheduleStartFade(ScrollbarLayer.FADE_DELAY);
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} else if (mFadeRunnable.timeToFade()) {
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boolean stillFading = mVertScrollLayer.fade() | mHorizScrollLayer.fade();
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if (stillFading) {
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mFadeRunnable.scheduleNextFadeFrame();
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}
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}
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mLastPageContext = pageContext;
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/* Update layers. */
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if (rootLayer != null) updated &= rootLayer.update(pageContext);
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updated &= mBackgroundLayer.update(screenContext);
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updated &= mShadowLayer.update(pageContext);
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updateCheckerboardLayer(screenContext);
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updated &= mFrameRateLayer.update(screenContext);
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updated &= mVertScrollLayer.update(pageContext);
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updated &= mHorizScrollLayer.update(pageContext);
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for (Layer layer : mExtraLayers)
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updated &= layer.update(pageContext);
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/* Draw the background. */
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mBackgroundLayer.draw(screenContext);
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/* Draw the drop shadow, if we need to. */
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Rect pageRect = getPageRect();
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RectF untransformedPageRect = new RectF(0.0f, 0.0f, pageRect.width(),
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pageRect.height());
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if (!untransformedPageRect.contains(controller.getViewport()))
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mShadowLayer.draw(pageContext);
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/* Draw the checkerboard. */
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Rect scissorRect = transformToScissorRect(pageRect);
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GLES20.glEnable(GLES20.GL_SCISSOR_TEST);
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GLES20.glScissor(scissorRect.left, scissorRect.top,
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scissorRect.width(), scissorRect.height());
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mCheckerboardLayer.draw(screenContext);
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/* Draw the layer the client added to us. */
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if (rootLayer != null)
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rootLayer.draw(pageContext);
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GLES20.glDisable(GLES20.GL_SCISSOR_TEST);
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/* Draw any extra layers that were added (likely plugins) */
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for (Layer layer : mExtraLayers)
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layer.draw(pageContext);
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/* Draw the vertical scrollbar. */
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IntSize screenSize = new IntSize(controller.getViewportSize());
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if (pageRect.height() > screenSize.height)
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mVertScrollLayer.draw(pageContext);
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/* Draw the horizontal scrollbar. */
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if (pageRect.width() > screenSize.width)
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mHorizScrollLayer.draw(pageContext);
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/* Measure how much of the screen is checkerboarding */
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if ((rootLayer != null) &&
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(mProfileRender || PanningPerfAPI.isRecordingCheckerboard())) {
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// Find out how much of the viewport area is valid
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Rect viewport = RectUtils.round(pageContext.viewport);
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Region validRegion = rootLayer.getValidRegion(pageContext);
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validRegion.op(viewport, Region.Op.INTERSECT);
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float checkerboard = 0.0f;
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if (!(validRegion.isRect() && validRegion.getBounds().equals(viewport))) {
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int screenArea = viewport.width() * viewport.height();
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validRegion.op(viewport, Region.Op.REVERSE_DIFFERENCE);
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// XXX The assumption here is that a Region never has overlapping
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// rects. This is true, as evidenced by reading the SkRegion
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// source, but is not mentioned in the Android documentation,
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// and so is liable to change.
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// If it does change, this code will need to be reevaluated.
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Rect r = new Rect();
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int checkerboardArea = 0;
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for (RegionIterator i = new RegionIterator(validRegion); i.next(r);) {
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checkerboardArea += r.width() * r.height();
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}
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checkerboard = checkerboardArea / (float)screenArea;
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}
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PanningPerfAPI.recordCheckerboard(checkerboard);
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mCompleteFramesRendered += 1.0f - checkerboard;
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mFramesRendered ++;
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if (frameStartTime - mProfileOutputTime > 1000) {
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mProfileOutputTime = frameStartTime;
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printCheckerboardStats();
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}
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}
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}
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/* Draw the FPS. */
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if (mShowFrameRate) {
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updateDroppedFrames(frameStartTime);
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try {
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GLES20.glEnable(GLES20.GL_BLEND);
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GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
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mFrameRateLayer.draw(screenContext);
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} finally {
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GLES20.glDisable(GLES20.GL_BLEND);
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}
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}
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// If a layer update requires further work, schedule another redraw
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if (!updated)
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mView.requestRender();
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PanningPerfAPI.recordFrameTime();
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/* Used by robocop for testing purposes */
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IntBuffer pixelBuffer = mPixelBuffer;
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if (updated && pixelBuffer != null) {
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synchronized (pixelBuffer) {
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pixelBuffer.position(0);
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gl.glReadPixels(0, 0, (int)screenContext.viewport.width(), (int)screenContext.viewport.height(), GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, pixelBuffer);
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pixelBuffer.notify();
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}
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Frame frame = new Frame(true);
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synchronized (mView.getController()) {
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frame.beginDrawing();
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frame.drawBackground();
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frame.drawRootLayer();
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frame.drawForeground();
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frame.endDrawing();
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}
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}
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@ -594,4 +458,200 @@ public class LayerRenderer implements GLSurfaceView.Renderer {
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}
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}
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}
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public class Frame {
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// Whether to use a scissor rect to clip the page.
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private final boolean mScissor;
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// The timestamp recording the start of this frame.
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private long mFrameStartTime;
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// A rendering context for page-positioned layers, and one for screen-positioned layers.
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private RenderContext mPageContext, mScreenContext;
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// Whether a layer was updated.
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private boolean mUpdated;
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public Frame(boolean scissor) {
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mScissor = scissor;
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}
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public void beginDrawing() {
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mFrameStartTime = SystemClock.uptimeMillis();
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TextureReaper.get().reap();
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TextureGenerator.get().fill();
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LayerController controller = mView.getController();
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mScreenContext = createScreenContext();
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mUpdated = true;
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Layer rootLayer = controller.getRoot();
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mPageContext = createPageContext();
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if (!mPageContext.fuzzyEquals(mLastPageContext)) {
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// the viewport or page changed, so show the scrollbars again
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// as per UX decision
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mVertScrollLayer.unfade();
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mHorizScrollLayer.unfade();
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mFadeRunnable.scheduleStartFade(ScrollbarLayer.FADE_DELAY);
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} else if (mFadeRunnable.timeToFade()) {
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boolean stillFading = mVertScrollLayer.fade() | mHorizScrollLayer.fade();
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if (stillFading) {
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mFadeRunnable.scheduleNextFadeFrame();
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}
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}
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mLastPageContext = mPageContext;
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/* Update layers. */
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if (rootLayer != null) mUpdated &= rootLayer.update(mPageContext);
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mUpdated &= mBackgroundLayer.update(mScreenContext);
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mUpdated &= mShadowLayer.update(mPageContext);
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updateCheckerboardLayer(mScreenContext);
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mUpdated &= mFrameRateLayer.update(mScreenContext);
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mUpdated &= mVertScrollLayer.update(mPageContext);
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mUpdated &= mHorizScrollLayer.update(mPageContext);
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for (Layer layer : mExtraLayers)
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mUpdated &= layer.update(mPageContext);
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GLES20.glDisable(GLES20.GL_SCISSOR_TEST);
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// If a layer update requires further work, schedule another redraw
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if (!mUpdated)
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mView.requestRender();
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PanningPerfAPI.recordFrameTime();
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/* Used by robocop for testing purposes */
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IntBuffer pixelBuffer = mPixelBuffer;
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if (mUpdated && pixelBuffer != null) {
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synchronized (pixelBuffer) {
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pixelBuffer.position(0);
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GLES20.glReadPixels(0, 0, (int)mScreenContext.viewport.width(),
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(int)mScreenContext.viewport.height(), GLES20.GL_RGBA,
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GLES20.GL_UNSIGNED_BYTE, pixelBuffer);
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pixelBuffer.notify();
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}
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}
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}
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public void drawBackground() {
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/* Draw the background. */
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mBackgroundLayer.draw(mScreenContext);
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/* Draw the drop shadow, if we need to. */
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Rect pageRect = getPageRect();
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RectF untransformedPageRect = new RectF(0.0f, 0.0f, pageRect.width(),
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pageRect.height());
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if (!untransformedPageRect.contains(mView.getController().getViewport()))
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mShadowLayer.draw(mPageContext);
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/* Define the scissor rect, if necessary. */
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if (mScissor) {
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Rect scissorRect = transformToScissorRect(pageRect);
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GLES20.glEnable(GLES20.GL_SCISSOR_TEST);
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GLES20.glScissor(scissorRect.left, scissorRect.top,
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scissorRect.width(), scissorRect.height());
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}
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/* Draw the checkerboard. */
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mCheckerboardLayer.draw(mScreenContext);
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}
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// Draws the layer the client added to us.
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public void drawRootLayer() {
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Layer rootLayer = mView.getController().getRoot();
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if (rootLayer != null)
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rootLayer.draw(mPageContext);
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}
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public void drawForeground() {
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Rect pageRect = getPageRect();
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LayerController controller = mView.getController();
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/* Draw any extra layers that were added (likely plugins) */
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for (Layer layer : mExtraLayers)
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layer.draw(mPageContext);
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/* Draw the vertical scrollbar. */
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IntSize screenSize = new IntSize(controller.getViewportSize());
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if (pageRect.height() > screenSize.height)
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mVertScrollLayer.draw(mPageContext);
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/* Draw the horizontal scrollbar. */
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if (pageRect.width() > screenSize.width)
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mHorizScrollLayer.draw(mPageContext);
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/* Measure how much of the screen is checkerboarding */
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Layer rootLayer = controller.getRoot();
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if ((rootLayer != null) &&
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(mProfileRender || PanningPerfAPI.isRecordingCheckerboard())) {
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// Find out how much of the viewport area is valid
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Rect viewport = RectUtils.round(mPageContext.viewport);
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Region validRegion = rootLayer.getValidRegion(mPageContext);
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validRegion.op(viewport, Region.Op.INTERSECT);
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float checkerboard = 0.0f;
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if (!(validRegion.isRect() && validRegion.getBounds().equals(viewport))) {
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int screenArea = viewport.width() * viewport.height();
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validRegion.op(viewport, Region.Op.REVERSE_DIFFERENCE);
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// XXX The assumption here is that a Region never has overlapping
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// rects. This is true, as evidenced by reading the SkRegion
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// source, but is not mentioned in the Android documentation,
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// and so is liable to change.
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// If it does change, this code will need to be reevaluated.
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Rect r = new Rect();
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int checkerboardArea = 0;
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for (RegionIterator i = new RegionIterator(validRegion); i.next(r);) {
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checkerboardArea += r.width() * r.height();
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}
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checkerboard = checkerboardArea / (float)screenArea;
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}
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PanningPerfAPI.recordCheckerboard(checkerboard);
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mCompleteFramesRendered += 1.0f - checkerboard;
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mFramesRendered ++;
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if (mFrameStartTime - mProfileOutputTime > 1000) {
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mProfileOutputTime = mFrameStartTime;
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printCheckerboardStats();
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}
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}
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/* Draw the FPS. */
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if (mShowFrameRate) {
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updateDroppedFrames(mFrameStartTime);
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try {
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GLES20.glEnable(GLES20.GL_BLEND);
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GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
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mFrameRateLayer.draw(mScreenContext);
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} finally {
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GLES20.glDisable(GLES20.GL_BLEND);
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}
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}
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}
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public void endDrawing() {
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// If a layer update requires further work, schedule another redraw
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if (!mUpdated)
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mView.requestRender();
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PanningPerfAPI.recordFrameTime();
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/* Used by robocop for testing purposes */
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IntBuffer pixelBuffer = mPixelBuffer;
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if (mUpdated && pixelBuffer != null) {
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synchronized (pixelBuffer) {
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pixelBuffer.position(0);
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GLES20.glReadPixels(0, 0, (int)mScreenContext.viewport.width(),
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(int)mScreenContext.viewport.height(), GLES20.GL_RGBA,
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GLES20.GL_UNSIGNED_BYTE, pixelBuffer);
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pixelBuffer.notify();
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}
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}
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}
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}
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}
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