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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 "cc/io_surface_layer_impl.h"
#include "base/stringprintf.h"
#include "cc/gl_renderer.h" // For the GLC() macro.
#include "cc/graphics_context.h"
#include "cc/io_surface_draw_quad.h"
#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 {
IOSurfaceLayerImpl::IOSurfaceLayerImpl(int id)
: LayerImpl(id)
, m_ioSurfaceId(0)
, m_ioSurfaceChanged(false)
, m_ioSurfaceTextureId(0)
{
}
IOSurfaceLayerImpl::~IOSurfaceLayerImpl()
{
if (!m_ioSurfaceTextureId)
return;
GraphicsContext* context = layerTreeHostImpl()->context();
// FIXME: Implement this path for software compositing.
WebKit::WebGraphicsContext3D* context3d = context->context3D();
if (context3d)
context3d->deleteTexture(m_ioSurfaceTextureId);
}
void IOSurfaceLayerImpl::willDraw(ResourceProvider* resourceProvider)
{
LayerImpl::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 IOSurfaceLayerImpl::appendQuads(QuadSink& quadSink, AppendQuadsData& appendQuadsData)
{
SharedQuadState* sharedQuadState = quadSink.useSharedQuadState(createSharedQuadState());
appendDebugBorderQuad(quadSink, sharedQuadState, appendQuadsData);
gfx::Rect quadRect(gfx::Point(), contentBounds());
quadSink.append(IOSurfaceDrawQuad::create(sharedQuadState, quadRect, m_ioSurfaceSize, m_ioSurfaceTextureId, IOSurfaceDrawQuad::Flipped).PassAs<DrawQuad>(), appendQuadsData);
}
void IOSurfaceLayerImpl::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);
LayerImpl::dumpLayerProperties(str, indent);
}
void IOSurfaceLayerImpl::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 IOSurfaceLayerImpl::setIOSurfaceProperties(unsigned ioSurfaceId, const gfx::Size& size)
{
if (m_ioSurfaceId != ioSurfaceId)
m_ioSurfaceChanged = true;
m_ioSurfaceId = ioSurfaceId;
m_ioSurfaceSize = size;
}
const char* IOSurfaceLayerImpl::layerTypeAsString() const
{
return "IOSurfaceLayer";
}
} // namespace cc
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