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// 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 "CCIOSurfaceLayerImpl.h"
#include "CCGraphicsContext.h"
#include "CCIOSurfaceDrawQuad.h"
#include "base/stringprintf.h"
#include "cc/gl_renderer.h" // For the GLC() macro.
#include "cc/layer_tree_host_impl.h"
#include "cc/quad_sink.h"
#include "third_party/khronos/GLES2/gl2.h"
#include "third_party/khronos/GLES2/gl2ext.h"
#include <public/WebGraphicsContext3D.h>
namespace cc {
CCIOSurfaceLayerImpl::CCIOSurfaceLayerImpl(int id)
: CCLayerImpl(id)
, m_ioSurfaceId(0)
, m_ioSurfaceChanged(false)
, m_ioSurfaceTextureId(0)
{
}
CCIOSurfaceLayerImpl::~CCIOSurfaceLayerImpl()
{
if (!m_ioSurfaceTextureId)
return;
CCGraphicsContext* context = layerTreeHostImpl()->context();
// FIXME: Implement this path for software compositing.
WebKit::WebGraphicsContext3D* context3d = context->context3D();
if (context3d)
context3d->deleteTexture(m_ioSurfaceTextureId);
}
void CCIOSurfaceLayerImpl::willDraw(CCResourceProvider* resourceProvider)
{
CCLayerImpl::willDraw(resourceProvider);
if (m_ioSurfaceChanged) {
WebKit::WebGraphicsContext3D* context3d = resourceProvider->graphicsContext3D();
if (!context3d) {
// FIXME: Implement this path for software compositing.
return;
}
// FIXME: Do this in a way that we can track memory usage.
if (!m_ioSurfaceTextureId)
m_ioSurfaceTextureId = context3d->createTexture();
GLC(context3d, context3d->activeTexture(GL_TEXTURE0));
GLC(context3d, context3d->bindTexture(GL_TEXTURE_RECTANGLE_ARB, m_ioSurfaceTextureId));
GLC(context3d, context3d->texParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
GLC(context3d, context3d->texParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
GLC(context3d, context3d->texParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
GLC(context3d, context3d->texParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
context3d->texImageIOSurface2DCHROMIUM(GL_TEXTURE_RECTANGLE_ARB,
m_ioSurfaceSize.width(),
m_ioSurfaceSize.height(),
m_ioSurfaceId,
0);
// Do not check for error conditions. texImageIOSurface2DCHROMIUM is supposed to hold on to
// the last good IOSurface if the new one is already closed. This is only a possibility
// during live resizing of plugins. However, it seems that this is not sufficient to
// completely guard against garbage being drawn. If this is found to be a significant issue,
// it may be necessary to explicitly tell the embedder when to free the surfaces it has
// allocated.
m_ioSurfaceChanged = false;
}
}
void CCIOSurfaceLayerImpl::appendQuads(CCQuadSink& quadSink, CCAppendQuadsData& appendQuadsData)
{
CCSharedQuadState* sharedQuadState = quadSink.useSharedQuadState(createSharedQuadState());
appendDebugBorderQuad(quadSink, sharedQuadState, appendQuadsData);
IntRect quadRect(IntPoint(), contentBounds());
quadSink.append(CCIOSurfaceDrawQuad::create(sharedQuadState, quadRect, m_ioSurfaceSize, m_ioSurfaceTextureId, CCIOSurfaceDrawQuad::Flipped).PassAs<CCDrawQuad>(), appendQuadsData);
}
void CCIOSurfaceLayerImpl::dumpLayerProperties(std::string* str, int indent) const
{
str->append(indentString(indent));
base::StringAppendF(str, "iosurface id: %u texture id: %u\n", m_ioSurfaceId, m_ioSurfaceTextureId);
CCLayerImpl::dumpLayerProperties(str, indent);
}
void CCIOSurfaceLayerImpl::didLoseContext()
{
// We don't have a valid texture ID in the new context; however,
// the IOSurface is still valid.
m_ioSurfaceTextureId = 0;
m_ioSurfaceChanged = true;
}
void CCIOSurfaceLayerImpl::setIOSurfaceProperties(unsigned ioSurfaceId, const IntSize& size)
{
if (m_ioSurfaceId != ioSurfaceId)
m_ioSurfaceChanged = true;
m_ioSurfaceId = ioSurfaceId;
m_ioSurfaceSize = size;
}
const char* CCIOSurfaceLayerImpl::layerTypeAsString() const
{
return "IOSurfaceLayer";
}
}
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