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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 "webkit/glue/plugins/pepper_image_data.h"
#include "base/scoped_ptr.h"
#include "skia/ext/platform_canvas.h"
#include "third_party/ppapi/c/pp_instance.h"
#include "third_party/ppapi/c/pp_module.h"
#include "third_party/ppapi/c/pp_resource.h"
#include "third_party/ppapi/c/ppb_image_data.h"
#include "webkit/glue/plugins/pepper_plugin_instance.h"
#include "webkit/glue/plugins/pepper_plugin_module.h"
#include "webkit/glue/plugins/pepper_resource_tracker.h"
namespace pepper {
namespace {
ImageData* ResourceAsImageData(PP_Resource resource) {
scoped_refptr<Resource> image_resource =
ResourceTracker::Get()->GetResource(resource);
if (!image_resource.get())
return NULL;
return image_resource->AsImageData();
}
PP_Resource Create(PP_Module module_id,
PP_ImageDataFormat format,
int32_t width,
int32_t height) {
PluginModule* module = PluginModule::FromPPModule(module_id);
if (!module)
return NullPPResource();
scoped_refptr<ImageData> data(new ImageData(module));
if (!data->Init(format, width, height))
return NullPPResource();
data->AddRef(); // AddRef for the caller.
return data->GetResource();
}
bool IsImageData(PP_Resource resource) {
scoped_refptr<Resource> image_resource =
ResourceTracker::Get()->GetResource(resource);
if (!image_resource.get())
return false;
return !!image_resource->AsImageData();
}
bool Describe(PP_Resource resource,
PP_ImageDataDesc* desc) {
// Give predictable values on failure.
memset(desc, 0, sizeof(PP_ImageDataDesc));
ImageData* image_data = ResourceAsImageData(resource);
if (!image_data)
return false;
image_data->Describe(desc);
return true;
}
void* Map(PP_Resource resource) {
ImageData* image_data = ResourceAsImageData(resource);
if (!image_data)
return NULL;
return image_data->Map();
}
void Unmap(PP_Resource resource) {
ImageData* image_data = ResourceAsImageData(resource);
if (!image_data)
return;
return image_data->Unmap();
}
const PPB_ImageData ppb_imagedata = {
&Create,
&IsImageData,
&Describe,
&Map,
&Unmap,
};
} // namespace
ImageData::ImageData(PluginModule* module)
: Resource(module),
width_(0),
height_(0) {
}
ImageData::~ImageData() {
}
// static
const PPB_ImageData* ImageData::GetInterface() {
return &ppb_imagedata;
}
bool ImageData::Init(PP_ImageDataFormat format,
int width,
int height) {
// TODO(brettw) this should be called only on the main thread!
platform_image_.reset(
module()->GetSomeInstance()->delegate()->CreateImage2D(width, height));
width_ = width;
height_ = height;
return !!platform_image_.get();
}
void ImageData::Describe(PP_ImageDataDesc* desc) const {
desc->format = PP_IMAGEDATAFORMAT_BGRA_PREMUL;
desc->width = width_;
desc->height = height_;
desc->stride = width_ * 4;
}
void* ImageData::Map() {
if (!mapped_canvas_.get()) {
mapped_canvas_.reset(platform_image_->Map());
if (!mapped_canvas_.get())
return NULL;
}
const SkBitmap& bitmap =
mapped_canvas_->getTopPlatformDevice().accessBitmap(true);
// Our platform bitmaps are set to opaque by default, which we don't want.
const_cast<SkBitmap&>(bitmap).setIsOpaque(false);
bitmap.lockPixels();
return bitmap.getAddr32(0, 0);
}
void ImageData::Unmap() {
// This is currently unimplemented, which is OK. The data will just always
// be around once it's mapped. Chrome's TransportDIB isn't currently
// unmappable without freeing it, but this may be something we want to support
// in the future to save some memory.
}
const SkBitmap& ImageData::GetMappedBitmap() const {
return mapped_canvas_->getTopPlatformDevice().accessBitmap(false);
}
} // namespace pepper
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