cc/heads_up_display_layer_impl.cc - chromium/src - Git at Google

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "config.h"

 #include "cc/heads_up_display_layer_impl.h"

 #include "base/stringprintf.h"
 #include "cc/debug_rect_history.h"
 #include "cc/font_atlas.h"
 #include "cc/frame_rate_counter.h"
 #include "cc/layer_tree_host_impl.h"
 #include "cc/quad_sink.h"
 #include "cc/texture_draw_quad.h"
 #include "skia/ext/platform_canvas.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/effects/SkColorMatrixFilter.h"
 #include "ui/gfx/point.h"

 namespace cc {

 static inline SkPaint createPaint()
 {
     // The SkCanvas is in RGBA but the shader is expecting BGRA, so we need to
     // swizzle our colors when drawing to the SkCanvas.
     SkColorMatrix swizzleMatrix;
     for (int i = 0; i < 20; ++i)
         swizzleMatrix.fMat[i] = 0;
     swizzleMatrix.fMat[0 + 5 * 2] = 1;
     swizzleMatrix.fMat[1 + 5 * 1] = 1;
     swizzleMatrix.fMat[2 + 5 * 0] = 1;
     swizzleMatrix.fMat[3 + 5 * 3] = 1;

     SkPaint paint;
     paint.setColorFilter(new SkColorMatrixFilter(swizzleMatrix))->unref();
     return paint;
 }

 HeadsUpDisplayLayerImpl::HeadsUpDisplayLayerImpl(int id)
     : LayerImpl(id)
 {
 }

 HeadsUpDisplayLayerImpl::~HeadsUpDisplayLayerImpl()
 {
 }

 void HeadsUpDisplayLayerImpl::setFontAtlas(scoped_ptr<FontAtlas> fontAtlas)
 {
     m_fontAtlas = fontAtlas.Pass();
 }

 void HeadsUpDisplayLayerImpl::willDraw(ResourceProvider* resourceProvider)
 {
     LayerImpl::willDraw(resourceProvider);

     if (!m_hudTexture)
         m_hudTexture = ScopedTexture::create(resourceProvider);

     // FIXME: Scale the HUD by deviceScale to make it more friendly under high DPI.

     if (m_hudTexture->size() != bounds())
         m_hudTexture->free();

     if (!m_hudTexture->id())
         m_hudTexture->allocate(Renderer::ImplPool, bounds(), GL_RGBA, ResourceProvider::TextureUsageAny);
 }

 void HeadsUpDisplayLayerImpl::appendQuads(QuadSink& quadSink, AppendQuadsData& appendQuadsData)
 {
     if (!m_hudTexture->id())
         return;

     SharedQuadState* sharedQuadState = quadSink.useSharedQuadState(createSharedQuadState());

     gfx::Rect quadRect(gfx::Point(), bounds());
     bool premultipliedAlpha = true;
     gfx::RectF uvRect(0, 0, 1, 1);
     bool flipped = false;
     quadSink.append(TextureDrawQuad::create(sharedQuadState, quadRect, m_hudTexture->id(), premultipliedAlpha, uvRect, flipped).PassAs<DrawQuad>(), appendQuadsData);
 }

 void HeadsUpDisplayLayerImpl::updateHudTexture(ResourceProvider* resourceProvider)
 {
     if (!m_hudTexture->id())
         return;

     SkISize canvasSize;
     if (m_hudCanvas)
         canvasSize = m_hudCanvas->getDeviceSize();
     else
         canvasSize.set(0, 0);

     if (canvasSize.fWidth != bounds().width() || canvasSize.fHeight != bounds().height() || !m_hudCanvas)
         m_hudCanvas = make_scoped_ptr(skia::CreateBitmapCanvas(bounds().width(), bounds().height(), false /* opaque */));

     m_hudCanvas->clear(SkColorSetARGB(0, 0, 0, 0));
     drawHudContents(m_hudCanvas.get());

     const SkBitmap* bitmap = &m_hudCanvas->getDevice()->accessBitmap(false);
     SkAutoLockPixels locker(*bitmap);

     gfx::Rect layerRect(gfx::Point(), bounds());
     DCHECK(bitmap->config() == SkBitmap::kARGB_8888_Config);
     resourceProvider->setPixels(m_hudTexture->id(), static_cast<const uint8_t*>(bitmap->getPixels()), layerRect, layerRect, gfx::Vector2d());
 }

 void HeadsUpDisplayLayerImpl::didDraw(ResourceProvider* resourceProvider)
 {
     LayerImpl::didDraw(resourceProvider);

     if (!m_hudTexture->id())
         return;

     // FIXME: the following assert will not be true when sending resources to a
     // parent compositor. We will probably need to hold on to m_hudTexture for
     // longer, and have several HUD textures in the pipeline.
     DCHECK(!resourceProvider->inUseByConsumer(m_hudTexture->id()));
 }

 void HeadsUpDisplayLayerImpl::didLoseContext()
 {
     m_hudTexture.reset();
 }

 bool HeadsUpDisplayLayerImpl::layerIsAlwaysDamaged() const
 {
     return true;
 }

 void HeadsUpDisplayLayerImpl::drawHudContents(SkCanvas* canvas)
 {
     const LayerTreeSettings& settings = layerTreeHostImpl()->settings();

     if (settings.showPlatformLayerTree) {
         SkPaint paint = createPaint();
         paint.setColor(SkColorSetARGB(192, 0, 0, 0));
         canvas->drawRect(SkRect::MakeXYWH(0, 0, bounds().width(), bounds().height()), paint);
     }

     int fpsCounterHeight = 40;
     int fpsCounterTop = 2;
     int platformLayerTreeTop;

     if (settings.showFPSCounter)
         platformLayerTreeTop = fpsCounterTop + fpsCounterHeight;
     else
         platformLayerTreeTop = 0;

     if (settings.showFPSCounter)
         drawFPSCounter(canvas, layerTreeHostImpl()->fpsCounter(), fpsCounterTop, fpsCounterHeight);

     if (settings.showPlatformLayerTree && m_fontAtlas.get()) {
         std::string layerTree = layerTreeHostImpl()->layerTreeAsText();
         m_fontAtlas->drawText(canvas, createPaint(), layerTree, gfx::Point(2, platformLayerTreeTop), bounds());
     }

     if (settings.showDebugRects())
         drawDebugRects(canvas, layerTreeHostImpl()->debugRectHistory());
 }

 void HeadsUpDisplayLayerImpl::drawFPSCounter(SkCanvas* canvas, FrameRateCounter* fpsCounter, int top, int height)
 {
     float textWidth = 170; // so text fits on linux.
     float graphWidth = fpsCounter->timeStampHistorySize();

     // Draw the FPS text.
     drawFPSCounterText(canvas, fpsCounter, top, textWidth, height);

     // Draw FPS graph.
     const double loFPS = 0;
     const double hiFPS = 80;
     SkPaint paint = createPaint();
     paint.setColor(SkColorSetRGB(154, 205, 50));
     canvas->drawRect(SkRect::MakeXYWH(2 + textWidth, top, graphWidth, height / 2), paint);

     paint.setColor(SkColorSetRGB(255, 250, 205));
     canvas->drawRect(SkRect::MakeXYWH(2 + textWidth, top + height / 2, graphWidth, height / 2), paint);

     int graphLeft = static_cast<int>(textWidth + 3);
     int x = 0;
     double h = static_cast<double>(height - 2);
     SkPath path;
     for (int i = 0; i < fpsCounter->timeStampHistorySize() - 1; ++i) {
         int j = i + 1;
         base::TimeDelta delta = fpsCounter->timeStampOfRecentFrame(j) - fpsCounter->timeStampOfRecentFrame(i);

         // Skip plotting this particular instantaneous frame rate if it is not likely to have been valid.
         if (fpsCounter->isBadFrameInterval(delta)) {
             x += 1;
             continue;
         }

         double fps = 1.0 / delta.InSecondsF();

         // Clamp the FPS to the range we want to plot visually.
         double p = 1 - ((fps - loFPS) / (hiFPS - loFPS));
         if (p < 0)
             p = 0;
         if (p > 1)
             p = 1;

         // Plot this data point.
         SkPoint cur = SkPoint::Make(graphLeft + x, 1 + top + p*h);
         if (path.isEmpty())
             path.moveTo(cur);
         else
             path.lineTo(cur);
         x += 1;
     }
     paint.setColor(SK_ColorRED);
     paint.setStyle(SkPaint::kStroke_Style);
     paint.setStrokeWidth(1);
     paint.setAntiAlias(true);
     canvas->drawPath(path, paint);
 }

 void HeadsUpDisplayLayerImpl::drawFPSCounterText(SkCanvas* canvas, FrameRateCounter* fpsCounter, int top, int width, int height)
 {
     double averageFPS, stdDeviation;
     fpsCounter->getAverageFPSAndStandardDeviation(averageFPS, stdDeviation);

     // Draw background.
     SkPaint paint = createPaint();
     paint.setColor(SK_ColorBLACK);
     canvas->drawRect(SkRect::MakeXYWH(2, top, width, height), paint);

     // Draw FPS text.
     if (m_fontAtlas.get())
         m_fontAtlas->drawText(canvas, createPaint(), base::StringPrintf("FPS: %4.1f +/- %3.1f", averageFPS, stdDeviation), gfx::Point(10, height / 3), gfx::Size(width, height));
 }

 void HeadsUpDisplayLayerImpl::drawDebugRects(SkCanvas* canvas, DebugRectHistory* debugRectHistory)
 {
     const std::vector<DebugRect>& debugRects = debugRectHistory->debugRects();

     for (size_t i = 0; i < debugRects.size(); ++i) {
         SkColor strokeColor = 0;
         SkColor fillColor = 0;

         switch (debugRects[i].type) {
         case PaintRectType:
             // Paint rects in red
             strokeColor = SkColorSetARGB(255, 255, 0, 0);
             fillColor = SkColorSetARGB(30, 255, 0, 0);
             break;
         case PropertyChangedRectType:
             // Property-changed rects in blue
             strokeColor = SkColorSetARGB(255, 255, 0, 0);
             fillColor = SkColorSetARGB(30, 0, 0, 255);
             break;
         case SurfaceDamageRectType:
             // Surface damage rects in yellow-orange
             strokeColor = SkColorSetARGB(255, 200, 100, 0);
             fillColor = SkColorSetARGB(30, 200, 100, 0);
             break;
         case ReplicaScreenSpaceRectType:
             // Screen space rects in green.
             strokeColor = SkColorSetARGB(255, 100, 200, 0);
             fillColor = SkColorSetARGB(30, 100, 200, 0);
             break;
         case ScreenSpaceRectType:
             // Screen space rects in purple.
             strokeColor = SkColorSetARGB(255, 100, 0, 200);
             fillColor = SkColorSetARGB(10, 100, 0, 200);
             break;
         case OccludingRectType:
             // Occluding rects in a reddish color.
             strokeColor = SkColorSetARGB(255, 200, 0, 100);
             fillColor = SkColorSetARGB(10, 200, 0, 100);
             break;
         }

         const gfx::RectF& rect = debugRects[i].rect;
         SkRect skRect = SkRect::MakeXYWH(rect.x(), rect.y(), rect.width(), rect.height());
         SkPaint paint = createPaint();
         paint.setColor(fillColor);
         canvas->drawRect(skRect, paint);

         paint.setColor(strokeColor);
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setStrokeWidth(2);
         canvas->drawRect(skRect, paint);
     }
 }

 const char* HeadsUpDisplayLayerImpl::layerTypeAsString() const
 {
     return "HeadsUpDisplayLayer";
 }

 }  // namespace cc
	// Copyright 2012 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "config.h"

	#include "cc/heads_up_display_layer_impl.h"

	#include "base/stringprintf.h"
	#include "cc/debug_rect_history.h"
	#include "cc/font_atlas.h"
	#include "cc/frame_rate_counter.h"
	#include "cc/layer_tree_host_impl.h"
	#include "cc/quad_sink.h"
	#include "cc/texture_draw_quad.h"
	#include "skia/ext/platform_canvas.h"
	#include "skia/ext/platform_canvas.h"
	#include "third_party/khronos/GLES2/gl2.h"
	#include "third_party/khronos/GLES2/gl2ext.h"
	#include "third_party/skia/include/core/SkBitmap.h"
	#include "third_party/skia/include/core/SkPaint.h"
	#include "third_party/skia/include/effects/SkColorMatrixFilter.h"
	#include "ui/gfx/point.h"

	namespace cc {

	static inline SkPaint createPaint()
	{
	// The SkCanvas is in RGBA but the shader is expecting BGRA, so we need to
	// swizzle our colors when drawing to the SkCanvas.
	SkColorMatrix swizzleMatrix;
	for (int i = 0; i < 20; ++i)
	swizzleMatrix.fMat[i] = 0;
	swizzleMatrix.fMat[0 + 5 * 2] = 1;
	swizzleMatrix.fMat[1 + 5 * 1] = 1;
	swizzleMatrix.fMat[2 + 5 * 0] = 1;
	swizzleMatrix.fMat[3 + 5 * 3] = 1;

	SkPaint paint;
	paint.setColorFilter(new SkColorMatrixFilter(swizzleMatrix))->unref();
	return paint;
	}

	HeadsUpDisplayLayerImpl::HeadsUpDisplayLayerImpl(int id)
	: LayerImpl(id)
	{
	}

	HeadsUpDisplayLayerImpl::~HeadsUpDisplayLayerImpl()
	{
	}

	void HeadsUpDisplayLayerImpl::setFontAtlas(scoped_ptr<FontAtlas> fontAtlas)
	{
	m_fontAtlas = fontAtlas.Pass();
	}

	void HeadsUpDisplayLayerImpl::willDraw(ResourceProvider* resourceProvider)
	{
	LayerImpl::willDraw(resourceProvider);

	if (!m_hudTexture)
	m_hudTexture = ScopedTexture::create(resourceProvider);

	// FIXME: Scale the HUD by deviceScale to make it more friendly under high DPI.

	if (m_hudTexture->size() != bounds())
	m_hudTexture->free();

	if (!m_hudTexture->id())
	m_hudTexture->allocate(Renderer::ImplPool, bounds(), GL_RGBA, ResourceProvider::TextureUsageAny);
	}

	void HeadsUpDisplayLayerImpl::appendQuads(QuadSink& quadSink, AppendQuadsData& appendQuadsData)
	{
	if (!m_hudTexture->id())
	return;

	SharedQuadState* sharedQuadState = quadSink.useSharedQuadState(createSharedQuadState());

	gfx::Rect quadRect(gfx::Point(), bounds());
	bool premultipliedAlpha = true;
	gfx::RectF uvRect(0, 0, 1, 1);
	bool flipped = false;
	quadSink.append(TextureDrawQuad::create(sharedQuadState, quadRect, m_hudTexture->id(), premultipliedAlpha, uvRect, flipped).PassAs<DrawQuad>(), appendQuadsData);
	}

	void HeadsUpDisplayLayerImpl::updateHudTexture(ResourceProvider* resourceProvider)
	{
	if (!m_hudTexture->id())
	return;

	SkISize canvasSize;
	if (m_hudCanvas)
	canvasSize = m_hudCanvas->getDeviceSize();
	else
	canvasSize.set(0, 0);

	if (canvasSize.fWidth != bounds().width() \|\| canvasSize.fHeight != bounds().height() \|\| !m_hudCanvas)
	m_hudCanvas = make_scoped_ptr(skia::CreateBitmapCanvas(bounds().width(), bounds().height(), false /* opaque */));

	m_hudCanvas->clear(SkColorSetARGB(0, 0, 0, 0));
	drawHudContents(m_hudCanvas.get());

	const SkBitmap* bitmap = &m_hudCanvas->getDevice()->accessBitmap(false);
	SkAutoLockPixels locker(*bitmap);

	gfx::Rect layerRect(gfx::Point(), bounds());
	DCHECK(bitmap->config() == SkBitmap::kARGB_8888_Config);
	resourceProvider->setPixels(m_hudTexture->id(), static_cast<const uint8_t*>(bitmap->getPixels()), layerRect, layerRect, gfx::Vector2d());
	}

	void HeadsUpDisplayLayerImpl::didDraw(ResourceProvider* resourceProvider)
	{
	LayerImpl::didDraw(resourceProvider);

	if (!m_hudTexture->id())
	return;

	// FIXME: the following assert will not be true when sending resources to a
	// parent compositor. We will probably need to hold on to m_hudTexture for
	// longer, and have several HUD textures in the pipeline.
	DCHECK(!resourceProvider->inUseByConsumer(m_hudTexture->id()));
	}

	void HeadsUpDisplayLayerImpl::didLoseContext()
	{
	m_hudTexture.reset();
	}

	bool HeadsUpDisplayLayerImpl::layerIsAlwaysDamaged() const
	{
	return true;
	}

	void HeadsUpDisplayLayerImpl::drawHudContents(SkCanvas* canvas)
	{
	const LayerTreeSettings& settings = layerTreeHostImpl()->settings();

	if (settings.showPlatformLayerTree) {
	SkPaint paint = createPaint();
	paint.setColor(SkColorSetARGB(192, 0, 0, 0));
	canvas->drawRect(SkRect::MakeXYWH(0, 0, bounds().width(), bounds().height()), paint);
	}

	int fpsCounterHeight = 40;
	int fpsCounterTop = 2;
	int platformLayerTreeTop;

	if (settings.showFPSCounter)
	platformLayerTreeTop = fpsCounterTop + fpsCounterHeight;
	else
	platformLayerTreeTop = 0;

	if (settings.showFPSCounter)
	drawFPSCounter(canvas, layerTreeHostImpl()->fpsCounter(), fpsCounterTop, fpsCounterHeight);

	if (settings.showPlatformLayerTree && m_fontAtlas.get()) {
	std::string layerTree = layerTreeHostImpl()->layerTreeAsText();
	m_fontAtlas->drawText(canvas, createPaint(), layerTree, gfx::Point(2, platformLayerTreeTop), bounds());
	}

	if (settings.showDebugRects())
	drawDebugRects(canvas, layerTreeHostImpl()->debugRectHistory());
	}

	void HeadsUpDisplayLayerImpl::drawFPSCounter(SkCanvas* canvas, FrameRateCounter* fpsCounter, int top, int height)
	{
	float textWidth = 170; // so text fits on linux.
	float graphWidth = fpsCounter->timeStampHistorySize();

	// Draw the FPS text.
	drawFPSCounterText(canvas, fpsCounter, top, textWidth, height);

	// Draw FPS graph.
	const double loFPS = 0;
	const double hiFPS = 80;
	SkPaint paint = createPaint();
	paint.setColor(SkColorSetRGB(154, 205, 50));
	canvas->drawRect(SkRect::MakeXYWH(2 + textWidth, top, graphWidth, height / 2), paint);

	paint.setColor(SkColorSetRGB(255, 250, 205));
	canvas->drawRect(SkRect::MakeXYWH(2 + textWidth, top + height / 2, graphWidth, height / 2), paint);

	int graphLeft = static_cast<int>(textWidth + 3);
	int x = 0;
	double h = static_cast<double>(height - 2);
	SkPath path;
	for (int i = 0; i < fpsCounter->timeStampHistorySize() - 1; ++i) {
	int j = i + 1;
	base::TimeDelta delta = fpsCounter->timeStampOfRecentFrame(j) - fpsCounter->timeStampOfRecentFrame(i);

	// Skip plotting this particular instantaneous frame rate if it is not likely to have been valid.
	if (fpsCounter->isBadFrameInterval(delta)) {
	x += 1;
	continue;
	}

	double fps = 1.0 / delta.InSecondsF();

	// Clamp the FPS to the range we want to plot visually.
	double p = 1 - ((fps - loFPS) / (hiFPS - loFPS));
	if (p < 0)
	p = 0;
	if (p > 1)
	p = 1;

	// Plot this data point.
	SkPoint cur = SkPoint::Make(graphLeft + x, 1 + top + p*h);
	if (path.isEmpty())
	path.moveTo(cur);
	else
	path.lineTo(cur);
	x += 1;
	}
	paint.setColor(SK_ColorRED);
	paint.setStyle(SkPaint::kStroke_Style);
	paint.setStrokeWidth(1);
	paint.setAntiAlias(true);
	canvas->drawPath(path, paint);
	}

	void HeadsUpDisplayLayerImpl::drawFPSCounterText(SkCanvas* canvas, FrameRateCounter* fpsCounter, int top, int width, int height)
	{
	double averageFPS, stdDeviation;
	fpsCounter->getAverageFPSAndStandardDeviation(averageFPS, stdDeviation);

	// Draw background.
	SkPaint paint = createPaint();
	paint.setColor(SK_ColorBLACK);
	canvas->drawRect(SkRect::MakeXYWH(2, top, width, height), paint);

	// Draw FPS text.
	if (m_fontAtlas.get())
	m_fontAtlas->drawText(canvas, createPaint(), base::StringPrintf("FPS: %4.1f +/- %3.1f", averageFPS, stdDeviation), gfx::Point(10, height / 3), gfx::Size(width, height));
	}

	void HeadsUpDisplayLayerImpl::drawDebugRects(SkCanvas* canvas, DebugRectHistory* debugRectHistory)
	{
	const std::vector<DebugRect>& debugRects = debugRectHistory->debugRects();

	for (size_t i = 0; i < debugRects.size(); ++i) {
	SkColor strokeColor = 0;
	SkColor fillColor = 0;

	switch (debugRects[i].type) {
	case PaintRectType:
	// Paint rects in red
	strokeColor = SkColorSetARGB(255, 255, 0, 0);
	fillColor = SkColorSetARGB(30, 255, 0, 0);
	break;
	case PropertyChangedRectType:
	// Property-changed rects in blue
	strokeColor = SkColorSetARGB(255, 255, 0, 0);
	fillColor = SkColorSetARGB(30, 0, 0, 255);
	break;
	case SurfaceDamageRectType:
	// Surface damage rects in yellow-orange
	strokeColor = SkColorSetARGB(255, 200, 100, 0);
	fillColor = SkColorSetARGB(30, 200, 100, 0);
	break;
	case ReplicaScreenSpaceRectType:
	// Screen space rects in green.
	strokeColor = SkColorSetARGB(255, 100, 200, 0);
	fillColor = SkColorSetARGB(30, 100, 200, 0);
	break;
	case ScreenSpaceRectType:
	// Screen space rects in purple.
	strokeColor = SkColorSetARGB(255, 100, 0, 200);
	fillColor = SkColorSetARGB(10, 100, 0, 200);
	break;
	case OccludingRectType:
	// Occluding rects in a reddish color.
	strokeColor = SkColorSetARGB(255, 200, 0, 100);
	fillColor = SkColorSetARGB(10, 200, 0, 100);
	break;
	}

	const gfx::RectF& rect = debugRects[i].rect;
	SkRect skRect = SkRect::MakeXYWH(rect.x(), rect.y(), rect.width(), rect.height());
	SkPaint paint = createPaint();
	paint.setColor(fillColor);
	canvas->drawRect(skRect, paint);

	paint.setColor(strokeColor);
	paint.setStyle(SkPaint::kStroke_Style);
	paint.setStrokeWidth(2);
	canvas->drawRect(skRect, paint);
	}
	}

	const char* HeadsUpDisplayLayerImpl::layerTypeAsString() const
	{
	return "HeadsUpDisplayLayer";
	}

	} // namespace cc