Add CC software renderer.

cc/CCRendererSoftware.cpp

+// 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 "CCRendererSoftware.h"
+
+#include "CCDebugBorderDrawQuad.h"
+#include "CCSolidColorDrawQuad.h"
+#include "CCTextureDrawQuad.h"
+#include "CCTileDrawQuad.h"
+#include "SkCanvas.h"
+#include "SkColor.h"
+#include "SkMatrix.h"
+#include "SkPixelRef.h"
+#include <GLES2/gl2.h>
+#include <public/WebImage.h>
+#include <public/WebSize.h>
+#include <public/WebTransformationMatrix.h>
+
+using WebKit::WebCompositorSoftwareOutputDevice;
+using WebKit::WebImage;
+using WebKit::WebSize;
+using WebKit::WebTransformationMatrix;
+
+namespace cc {
+
+namespace {
+
+SkRect toSkRect(const FloatRect& rect)
+{
+    return SkRect::MakeXYWH(rect.x(), rect.y(), rect.width(), rect.height());
+}
+
+SkIRect toSkIRect(const IntRect& rect)
+{
+    return SkIRect::MakeXYWH(rect.x(), rect.y(), rect.width(), rect.height());
+}
+
+void toSkMatrix(SkMatrix* flattened, const WebTransformationMatrix& m)
+{
+    // Convert from 4x4 to 3x3 by dropping the third row and column.
+    flattened->set(0, m.m11());
+    flattened->set(1, m.m21());
+    flattened->set(2, m.m41());
+    flattened->set(3, m.m12());
+    flattened->set(4, m.m22());
+    flattened->set(5, m.m42());
+    flattened->set(6, m.m14());
+    flattened->set(7, m.m24());
+    flattened->set(8, m.m44());
+}
+
+} // anonymous namespace
+
+PassOwnPtr<CCRendererSoftware> CCRendererSoftware::create(CCRendererClient* client, CCResourceProvider* resourceProvider, WebCompositorSoftwareOutputDevice* outputDevice)
+{
+    return adoptPtr(new CCRendererSoftware(client, resourceProvider, outputDevice));
+}
+
+CCRendererSoftware::CCRendererSoftware(CCRendererClient* client, CCResourceProvider* resourceProvider, WebCompositorSoftwareOutputDevice* outputDevice)
+    : CCDirectRenderer(client, resourceProvider)
+    , m_visible(true)
+    , m_outputDevice(outputDevice)
+    , m_skRootCanvas(0)
+    , m_skCurrentCanvas(0)
+{
+    m_resourceProvider->setDefaultResourceType(CCResourceProvider::Bitmap);
+
+    m_capabilities.maxTextureSize = INT_MAX;
+    m_capabilities.bestTextureFormat = GraphicsContext3D::RGBA;
+    m_capabilities.contextHasCachedFrontBuffer = true;
+    m_capabilities.usingSetVisibility = true;
+
+    viewportChanged();
+}
+
+CCRendererSoftware::~CCRendererSoftware()
+{
+}
+
+const RendererCapabilities& CCRendererSoftware::capabilities() const
+{
+    return m_capabilities;
+}
+
+void CCRendererSoftware::viewportChanged()
+{
+    m_outputDevice->didChangeViewportSize(WebSize(viewportSize().width(), viewportSize().height()));
+}
+
+void CCRendererSoftware::beginDrawingFrame(DrawingFrame& frame)
+{
+    m_skRootCanvas.setBitmapDevice(m_outputDevice->lock(true)->getSkBitmap());
+}
+
+void CCRendererSoftware::finishDrawingFrame(DrawingFrame& frame)
+{
+    m_currentFramebufferLock.clear();
+    m_skCurrentCanvas = 0;
+    m_skRootCanvas.setDevice(0);
+    m_outputDevice->unlock();
+}
+
+bool CCRendererSoftware::flippedFramebuffer() const
+{
+    return false;
+}
+
+void CCRendererSoftware::finish()
+{
+}
+
+void CCRendererSoftware::bindFramebufferToOutputSurface(DrawingFrame& frame)
+{
+    m_currentFramebufferLock.clear();
+    m_skCurrentCanvas = &m_skRootCanvas;
+}
+
+bool CCRendererSoftware::bindFramebufferToTexture(DrawingFrame& frame, const CCScopedTexture* texture, const IntRect& framebufferRect)
+{
+    m_currentFramebufferLock = adoptPtr(new CCResourceProvider::ScopedWriteLockSoftware(m_resourceProvider, texture->id()));
+    m_skCurrentCanvas = m_currentFramebufferLock->skCanvas();
+    initializeMatrices(frame, framebufferRect, false);
+    setDrawViewportSize(framebufferRect.size());
+
+    return true;
+}
+
+void CCRendererSoftware::enableScissorTestRect(const IntRect& scissorRect)
+{
+    m_skCurrentCanvas->clipRect(toSkRect(scissorRect), SkRegion::kReplace_Op);
+}
+
+void CCRendererSoftware::disableScissorTest()
+{
+    IntRect canvasRect(IntPoint(), viewportSize());
+    m_skCurrentCanvas->clipRect(toSkRect(canvasRect), SkRegion::kReplace_Op);
+}
+
+void CCRendererSoftware::clearFramebuffer(DrawingFrame& frame)
+{
+    m_skCurrentCanvas->clear(SK_ColorGREEN);
+}
+
+void CCRendererSoftware::setDrawViewportSize(const IntSize& viewportSize)
+{
+}
+
+bool CCRendererSoftware::isSoftwareResource(CCResourceProvider::ResourceId id) const
+{
+    switch (m_resourceProvider->resourceType(id)) {
+    case CCResourceProvider::GLTexture:
+        return false;
+    case CCResourceProvider::Bitmap:
+        return true;
+    }
+
+    CRASH();
+    return false;
+}
+
+void CCRendererSoftware::drawQuad(DrawingFrame& frame, const CCDrawQuad* quad)
+{
+    WebTransformationMatrix quadRectMatrix;
+    quadRectTransform(&quadRectMatrix, quad->quadTransform(), quad->quadRect());
+    WebTransformationMatrix windowMatrix = frame.windowMatrix * frame.projectionMatrix * quadRectMatrix;
+    SkMatrix skWindowMatrix;
+    toSkMatrix(&skWindowMatrix, windowMatrix);
+    m_skCurrentCanvas->setMatrix(skWindowMatrix);
+
+    m_skCurrentPaint.reset();
+    if (quad->needsBlending())
+        m_skCurrentPaint.setAlpha(quad->opacity() * 255);
+    else
+        m_skCurrentPaint.setXfermodeMode(SkXfermode::kSrc_Mode);
+
+    switch (quad->material()) {
+    case CCDrawQuad::DebugBorder:
+        drawDebugBorderQuad(frame, CCDebugBorderDrawQuad::materialCast(quad));
+        break;
+    case CCDrawQuad::SolidColor:
+        drawSolidColorQuad(frame, CCSolidColorDrawQuad::materialCast(quad));
+        break;
+    case CCDrawQuad::TextureContent:
+        drawTextureQuad(frame, CCTextureDrawQuad::materialCast(quad));
+        break;
+    case CCDrawQuad::TiledContent:
+        drawTileQuad(frame, CCTileDrawQuad::materialCast(quad));
+        break;
+    default:
+        drawUnsupportedQuad(frame, quad);
+        break;
+    }
+
+    m_skCurrentCanvas->resetMatrix();
+}
+
+void CCRendererSoftware::drawDebugBorderQuad(const DrawingFrame& frame, const CCDebugBorderDrawQuad* quad)
+{
+    // We need to apply the matrix manually to have pixel-sized stroke width.
+    SkPoint vertices[4];
+    toSkRect(quadVertexRect()).toQuad(vertices);
+    SkPoint transformedVertices[4];
+    m_skCurrentCanvas->getTotalMatrix().mapPoints(transformedVertices, vertices, 4);
+    m_skCurrentCanvas->resetMatrix();
+
+    m_skCurrentPaint.setColor(quad->color());
+    m_skCurrentPaint.setAlpha(quad->opacity() * SkColorGetA(quad->color()));
+    m_skCurrentPaint.setStyle(SkPaint::kStroke_Style);
+    m_skCurrentPaint.setStrokeWidth(quad->width());
+    m_skCurrentCanvas->drawPoints(SkCanvas::kPolygon_PointMode, 4, transformedVertices, m_skCurrentPaint);
+}
+
+void CCRendererSoftware::drawSolidColorQuad(const DrawingFrame& frame, const CCSolidColorDrawQuad* quad)
+{
+    m_skCurrentPaint.setColor(quad->color());
+    m_skCurrentPaint.setAlpha(quad->opacity() * SkColorGetA(quad->color()));
+    m_skCurrentCanvas->drawRect(toSkRect(quadVertexRect()), m_skCurrentPaint);
+}
+
+void CCRendererSoftware::drawTextureQuad(const DrawingFrame& frame, const CCTextureDrawQuad* quad)
+{
+    if (!isSoftwareResource(quad->resourceId())) {
+        drawUnsupportedQuad(frame, quad);
+        return;
+    }
+
+    // FIXME: Add support for non-premultiplied alpha.
+    CCResourceProvider::ScopedReadLockSoftware quadResourceLock(m_resourceProvider, quad->resourceId());
+    FloatRect uvRect = quad->uvRect();
+    uvRect.scale(quad->quadRect().width(), quad->quadRect().height());
+    SkIRect skUvRect = toSkIRect(enclosingIntRect(uvRect));
+    if (quad->flipped())
+        m_skCurrentCanvas->scale(1, -1);
+    m_skCurrentCanvas->drawBitmapRect(*quadResourceLock.skBitmap(), &skUvRect, toSkRect(quadVertexRect()), &m_skCurrentPaint);
+}
+
+void CCRendererSoftware::drawTileQuad(const DrawingFrame& frame, const CCTileDrawQuad* quad)
+{
+    ASSERT(isSoftwareResource(quad->resourceId()));
+    CCResourceProvider::ScopedReadLockSoftware quadResourceLock(m_resourceProvider, quad->resourceId());
+
+    SkIRect uvRect = toSkIRect(IntRect(quad->textureOffset(), quad->quadRect().size()));
+    m_skCurrentCanvas->drawBitmapRect(*quadResourceLock.skBitmap(), &uvRect, toSkRect(quadVertexRect()), &m_skCurrentPaint);
+}
+
+void CCRendererSoftware::drawUnsupportedQuad(const DrawingFrame& frame, const CCDrawQuad* quad)
+{
+    m_skCurrentPaint.setColor(SK_ColorMAGENTA);
+    m_skCurrentPaint.setAlpha(quad->opacity() * 255);
+    m_skCurrentCanvas->drawRect(toSkRect(quadVertexRect()), m_skCurrentPaint);
+}
+
+bool CCRendererSoftware::swapBuffers()
+{
+    if (CCProxy::hasImplThread())
+        m_client->onSwapBuffersComplete();
+    return true;
+}
+
+void CCRendererSoftware::getFramebufferPixels(void *pixels, const IntRect& rect)
+{
+    SkBitmap fullBitmap = m_outputDevice->lock(false)->getSkBitmap();
+    SkBitmap subsetBitmap;
+    SkIRect invertRect = SkIRect::MakeXYWH(rect.x(), viewportSize().height() - rect.maxY(), rect.width(), rect.height());
+    fullBitmap.extractSubset(&subsetBitmap, invertRect);
+    subsetBitmap.copyPixelsTo(pixels, rect.width() * rect.height() * 4, rect.width() * 4);
+    m_outputDevice->unlock();
+}
+
+void CCRendererSoftware::setVisible(bool visible)
+{
+    if (m_visible == visible)
+        return;
+    m_visible = visible;
+}
+
+}