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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if USE(ACCELERATED_COMPOSITING)
#include "CCHeadsUpDisplay.h"
#include "CurrentTime.h"
#include "Font.h"
#include "FontDescription.h"
#include "GraphicsContext3D.h"
#include "LayerChromium.h"
#include "LayerTexture.h"
#include "TextRun.h"
#include "TextStream.h"
#include "TextureManager.h"
#include <wtf/text/CString.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
using namespace std;
CCHeadsUpDisplay::CCHeadsUpDisplay(LayerRendererChromium* owner)
: m_currentFrameNumber(1)
, m_filteredFrameTime(0)
, m_layerRenderer(owner)
, m_showFPSCounter(false)
, m_showPlatformLayerTree(false)
{
m_presentTimeHistoryInSec[0] = currentTime();
m_presentTimeHistoryInSec[1] = m_presentTimeHistoryInSec[0];
for (int i = 2; i < kPresentHistorySize; i++)
m_presentTimeHistoryInSec[i] = 0;
FontDescription mediumFontDesc;
mediumFontDesc.setGenericFamily(FontDescription::MonospaceFamily);
mediumFontDesc.setComputedSize(20);
m_mediumFont = adoptPtr(new Font(mediumFontDesc, 0, 0));
m_mediumFont->update(0);
FontDescription smallFontDesc;
smallFontDesc.setGenericFamily(FontDescription::MonospaceFamily);
smallFontDesc.setComputedSize(10);
m_smallFont = adoptPtr(new Font(smallFontDesc, 0, 0));
m_smallFont->update(0);
}
CCHeadsUpDisplay::~CCHeadsUpDisplay()
{
}
void CCHeadsUpDisplay::draw()
{
GraphicsContext3D* context = m_layerRenderer->context();
if (!m_hudTexture)
m_hudTexture = LayerTexture::create(context, m_layerRenderer->textureManager());
// Use a fullscreen texture only if we need to...
IntSize hudSize;
if (m_showPlatformLayerTree) {
hudSize.setWidth(min(2048, m_layerRenderer->viewportSize().width()));
hudSize.setHeight(min(2048, m_layerRenderer->viewportSize().height()));
} else {
hudSize.setWidth(512);
hudSize.setHeight(128);
}
m_hudTexture->reserve(hudSize, GraphicsContext3D::RGBA);
// Render pixels into the texture.
PlatformCanvas canvas;
canvas.resize(hudSize);
{
PlatformCanvas::Painter painter(&canvas, PlatformCanvas::Painter::GrayscaleText);
drawHudContents(painter.context(), hudSize);
}
// Upload to GL.
{
PlatformCanvas::AutoLocker locker(&canvas);
m_hudTexture->bindTexture();
GLC(context.get(), context->texImage2D(GraphicsContext3D::TEXTURE_2D, 0, GraphicsContext3D::RGBA, canvas.size().width(), canvas.size().height(), 0, GraphicsContext3D::RGBA, GraphicsContext3D::UNSIGNED_BYTE, locker.pixels()));
}
// Draw the HUD onto the default render surface.
const LayerTilerChromium::Program* program = m_layerRenderer->tilerProgram();
ASSERT(program && program->initialized());
GLC(context, context->activeTexture(GraphicsContext3D::TEXTURE0));
m_hudTexture->bindTexture();
m_layerRenderer->useShader(program->program());
GLC(context, context->uniform1i(program->fragmentShader().samplerLocation(), 0));
TransformationMatrix matrix;
matrix.translate3d(hudSize.width() * 0.5, hudSize.height() * 0.5, 0);
LayerChromium::drawTexturedQuad(context, m_layerRenderer->projectionMatrix(),
matrix, hudSize.width(), hudSize.height(),
1.0f, program->vertexShader().matrixLocation(),
program->fragmentShader().alphaLocation());
m_hudTexture->unreserve();
}
void CCHeadsUpDisplay::drawHudContents(GraphicsContext* ctx, const IntSize& hudSize)
{
if (m_showPlatformLayerTree) {
ctx->setFillColor(Color(0, 0, 0, 192), ColorSpaceDeviceRGB);
ctx->fillRect(FloatRect(0, 0, hudSize.width(), hudSize.height()));
}
int fpsCounterHeight = m_mediumFont->fontMetrics().floatHeight() + 2;
int fpsCounterTop = 2;
int platformLayerTreeTop;
if (m_showFPSCounter)
platformLayerTreeTop = fpsCounterTop + fpsCounterHeight + 2;
else
platformLayerTreeTop = 0;
if (m_showFPSCounter)
drawFPSCounter(ctx, fpsCounterTop, fpsCounterHeight);
if (m_showPlatformLayerTree)
drawPlatformLayerTree(ctx, platformLayerTreeTop);
}
void CCHeadsUpDisplay::drawFPSCounter(GraphicsContext* ctx, int top, int height)
{
// Note that since we haven't finished the current frame, the FPS counter
// actually reports the last frame's time.
double secForLastFrame = m_presentTimeHistoryInSec[(m_currentFrameNumber + kPresentHistorySize - 1) % kPresentHistorySize] -
m_presentTimeHistoryInSec[(m_currentFrameNumber + kPresentHistorySize - 2) % kPresentHistorySize];
// Filter the frame times to avoid spikes.
const float alpha = 0.1;
if (!m_filteredFrameTime) {
if (m_currentFrameNumber == 2)
m_filteredFrameTime = secForLastFrame;
} else
m_filteredFrameTime = ((1.0 - alpha) * m_filteredFrameTime) + (alpha * secForLastFrame);
// Create & measure FPS text.
String text(String::format("FPS: %5.1f", 1.0 / m_filteredFrameTime));
TextRun run(text);
float textWidth = m_mediumFont->width(run) + 2.0f;
float graphWidth = kPresentHistorySize;
// Draw background.
ctx->setFillColor(Color(0, 0, 0, 255), ColorSpaceDeviceRGB);
ctx->fillRect(FloatRect(2, top, textWidth + graphWidth, height));
// Draw FPS text.
if (m_filteredFrameTime) {
ctx->setFillColor(Color(255, 0, 0), ColorSpaceDeviceRGB);
ctx->drawText(*m_mediumFont, run, IntPoint(3, top + height - 6));
}
// Draw FPS graph.
const double loFPS = 0.0;
const double hiFPS = 120.0;
ctx->setStrokeStyle(SolidStroke);
ctx->setStrokeColor(Color(255, 0, 0), ColorSpaceDeviceRGB);
int graphLeft = static_cast<int>(textWidth + 3);
IntPoint prev(-1, 0);
int x = 0;
double h = static_cast<double>(height - 2);
for (int i = m_currentFrameNumber % kPresentHistorySize; i != (m_currentFrameNumber - 1) % kPresentHistorySize; i = (i + 1) % kPresentHistorySize) {
int j = (i + 1) % kPresentHistorySize;
double fps = 1.0 / (m_presentTimeHistoryInSec[j] - m_presentTimeHistoryInSec[i]);
double p = 1 - ((fps - loFPS) / (hiFPS - loFPS));
if (p < 0)
p = 0;
if (p > 1)
p = 1;
IntPoint cur(graphLeft + x, 1 + top + p*h);
if (prev.x() != -1)
ctx->drawLine(prev, cur);
prev = cur;
x += 1;
}
}
void CCHeadsUpDisplay::drawPlatformLayerTree(GraphicsContext* ctx, int top)
{
float smallFontHeight = m_smallFont->fontMetrics().floatHeight();
int y = top + smallFontHeight - 4;
ctx->setFillColor(Color(255, 0, 0), ColorSpaceDeviceRGB);
Vector<String> lines;
m_layerRenderer->layerTreeAsText().split('\n', lines);
for (size_t i = 0; i < lines.size(); ++i) {
ctx->drawText(*m_smallFont, TextRun(lines[i]), IntPoint(2, y));
y += smallFontHeight;
}
}
void CCHeadsUpDisplay::onPresent()
{
m_presentTimeHistoryInSec[m_currentFrameNumber % kPresentHistorySize] = currentTime();
m_currentFrameNumber += 1;
}
}
#endif // USE(ACCELERATED_COMPOSITING)
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