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// Copyright (c) 2010 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 "chrome/browser/renderer_host/accelerated_surface_container_mac.h"
#include "app/surface/io_surface_support_mac.h"
#include "base/logging.h"
#include "chrome/browser/renderer_host/accelerated_surface_container_manager_mac.h"
#include "webkit/glue/plugins/webplugin.h"
AcceleratedSurfaceContainerMac::AcceleratedSurfaceContainerMac(
AcceleratedSurfaceContainerManagerMac* manager,
bool opaque)
: manager_(manager),
opaque_(opaque),
x_(0),
y_(0),
surface_(NULL),
width_(0),
height_(0),
texture_(0),
texture_needs_upload_(true) {
}
AcceleratedSurfaceContainerMac::~AcceleratedSurfaceContainerMac() {
EnqueueTextureForDeletion();
ReleaseIOSurface();
}
void AcceleratedSurfaceContainerMac::ReleaseIOSurface() {
if (surface_) {
CFRelease(surface_);
surface_ = NULL;
}
}
void AcceleratedSurfaceContainerMac::SetSizeAndIOSurface(
int32 width,
int32 height,
uint64 io_surface_identifier) {
ReleaseIOSurface();
IOSurfaceSupport* io_surface_support = IOSurfaceSupport::Initialize();
if (io_surface_support) {
surface_ = io_surface_support->IOSurfaceLookup(
static_cast<uint32>(io_surface_identifier));
EnqueueTextureForDeletion();
width_ = width;
height_ = height;
}
}
void AcceleratedSurfaceContainerMac::SetSizeAndTransportDIB(
int32 width,
int32 height,
TransportDIB::Handle transport_dib) {
if (TransportDIB::is_valid(transport_dib)) {
transport_dib_.reset(TransportDIB::Map(transport_dib));
EnqueueTextureForDeletion();
width_ = width;
height_ = height;
}
}
void AcceleratedSurfaceContainerMac::MoveTo(
const webkit_glue::WebPluginGeometry& geom) {
x_ = geom.window_rect.x();
y_ = geom.window_rect.y();
// TODO(kbr): may need to pay attention to cutout rects.
if (geom.visible)
clipRect_ = geom.clip_rect;
else
clipRect_ = gfx::Rect();
}
void AcceleratedSurfaceContainerMac::Draw(CGLContextObj context) {
IOSurfaceSupport* io_surface_support = IOSurfaceSupport::Initialize();
GLenum target = GL_TEXTURE_RECTANGLE_ARB;
if (!texture_) {
if ((io_surface_support && !surface_) ||
(!io_surface_support && !transport_dib_.get()))
return;
glGenTextures(1, &texture_);
glBindTexture(target, texture_);
glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
if (io_surface_support) {
texture_needs_upload_ = true;
} else {
// Reserve space on the card for the actual texture upload, done with the
// glTexSubImage2D() call, below.
glTexImage2D(target,
0, // mipmap level 0
GL_RGBA, // internal format
width_,
height_,
0, // no border
GL_BGRA, // The GPU plugin read BGRA pixels
GL_UNSIGNED_INT_8_8_8_8_REV,
NULL); // No data, this call just reserves room.
}
}
// When using an IOSurface, the texture does not need to be repeatedly
// uploaded, just when we've been told we have to.
if (io_surface_support && texture_needs_upload_) {
DCHECK(surface_);
glBindTexture(target, texture_);
// Don't think we need to identify a plane.
GLuint plane = 0;
io_surface_support->CGLTexImageIOSurface2D(context,
target,
GL_RGBA,
width_,
height_,
GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8_REV,
surface_,
plane);
texture_needs_upload_ = false;
}
// If using TransportDIBs, the texture needs to be uploaded every frame.
if (transport_dib_.get() != NULL) {
void* pixel_memory = transport_dib_->memory();
if (pixel_memory) {
glBindTexture(target, texture_);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // Needed for NPOT textures.
glTexSubImage2D(target,
0, // mipmap level 0
0, // x-offset
0, // y-offset
width_,
height_,
GL_BGRA, // The GPU plugin gave us BGRA pixels
GL_UNSIGNED_INT_8_8_8_8_REV,
pixel_memory);
}
}
if (texture_) {
// TODO(kbr): convert this to use only OpenGL ES 2.0 functionality.
// TODO(kbr): may need to pay attention to cutout rects.
int clipX = clipRect_.x();
int clipY = clipRect_.y();
int clipWidth = clipRect_.width();
int clipHeight = clipRect_.height();
int x = x_ + clipX;
int y = y_ + clipY;
if (opaque_) {
// Pepper 3D's output is currently considered opaque even if the
// program draws pixels with alpha less than 1. In order to have
// this effect, we need to drop the alpha channel of the input,
// replacing it with alpha = 1.
// First fill the rectangle with alpha=1.
glColorMask(false, false, false, true);
glColor4f(0.0f, 0.0f, 0.0f, 1.0f);
glBegin(GL_TRIANGLE_STRIP);
glVertex3f(x, y, 0);
glVertex3f(x + clipWidth, y, 0);
glVertex3f(x, y + clipHeight, 0);
glVertex3f(x + clipWidth, y + clipHeight, 0);
glEnd();
// Now draw the color channels from the incoming texture.
glColorMask(true, true, true, false);
// This call shouldn't be necessary -- we are using the GL_REPLACE
// texture environment mode -- but it appears to be.
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
} else {
glColorMask(true, true, true, true);
}
// Draw the color channels from the incoming texture.
glBindTexture(target, texture_);
glEnable(target);
glBegin(GL_TRIANGLE_STRIP);
glTexCoord2f(clipX, height_ - clipY);
glVertex3f(x, y, 0);
glTexCoord2f(clipX + clipWidth, height_ - clipY);
glVertex3f(x + clipWidth, y, 0);
glTexCoord2f(clipX, height_ - clipY - clipHeight);
glVertex3f(x, y + clipHeight, 0);
glTexCoord2f(clipX + clipWidth, height_ - clipY - clipHeight);
glVertex3f(x + clipWidth, y + clipHeight, 0);
glEnd();
glDisable(target);
}
}
void AcceleratedSurfaceContainerMac::EnqueueTextureForDeletion() {
if (texture_) {
manager_->EnqueueTextureForDeletion(texture_);
texture_ = 0;
}
}
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