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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_device_context_2d.h"
#include "base/logging.h"
#include "gfx/point.h"
#include "gfx/rect.h"
#include "skia/ext/platform_canvas.h"
#include "third_party/ppapi/c/pp_module.h"
#include "third_party/ppapi/c/pp_rect.h"
#include "third_party/ppapi/c/pp_resource.h"
#include "third_party/ppapi/c/ppb_device_context_2d.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "webkit/glue/plugins/pepper_image_data.h"
#include "webkit/glue/plugins/pepper_plugin_module.h"
#include "webkit/glue/plugins/pepper_resource_tracker.h"
#if defined(OS_MACOSX)
#include "base/mac_util.h"
#include "base/scoped_cftyperef.h"
#endif
namespace pepper {
namespace {
PP_Resource Create(PP_Module module_id, int32_t width, int32_t height) {
PluginModule* module = PluginModule::FromPPModule(module_id);
if (!module)
return NullPPResource();
scoped_refptr<DeviceContext2D> context(new DeviceContext2D(module));
if (!context->Init(width, height))
return NullPPResource();
context->AddRef(); // AddRef for the caller.
return context->GetResource();
}
void PaintImageData(PP_Resource device_context,
PP_Resource image,
int32_t x, int32_t y,
const PP_Rect* dirty,
uint32_t dirty_rect_count,
PPB_DeviceContext2D_PaintCallback callback,
void* callback_data) {
scoped_refptr<Resource> device_resource =
ResourceTracker::Get()->GetResource(device_context);
if (!device_resource.get())
return;
DeviceContext2D* context = device_resource->AsDeviceContext2D();
if (!context)
return;
context->PaintImageData(image, x, y, dirty, dirty_rect_count,
callback, callback_data);
}
const PPB_DeviceContext2D ppb_devicecontext2d = {
&Create,
&PaintImageData,
};
} // namespace
DeviceContext2D::DeviceContext2D(PluginModule* module) : Resource(module) {
}
DeviceContext2D::~DeviceContext2D() {
}
// static
const PPB_DeviceContext2D* DeviceContext2D::GetInterface() {
return &ppb_devicecontext2d;
}
bool DeviceContext2D::Init(int width, int height) {
image_data_.reset(new ImageData(module()));
if (!image_data_->Init(PP_IMAGEDATAFORMAT_BGRA_PREMUL, width, height) ||
!image_data_->Map()) {
image_data_.reset();
return false;
}
return true;
}
void DeviceContext2D::PaintImageData(PP_Resource image,
int32_t x, int32_t y,
const PP_Rect* dirty,
uint32_t dirty_rect_count,
PPB_DeviceContext2D_PaintCallback callback,
void* callback_data) {
scoped_refptr<Resource> image_resource =
ResourceTracker::Get()->GetResource(image);
if (!image_resource.get())
return;
ImageData* new_image_data = image_resource->AsImageData();
if (!new_image_data)
return;
const SkBitmap& new_image_bitmap = new_image_data->GetMappedBitmap();
// TODO(brettw) handle multiple dirty rects.
DCHECK(dirty_rect_count == 1);
// Draw the bitmap to the backing store.
SkIRect src_rect;
if (dirty->left == 0 && dirty->top == 0 &&
dirty->right == 0 && dirty->bottom == 0) {
// Default to the entire bitmap.
src_rect.fLeft = 0;
src_rect.fTop = 0;
src_rect.fRight = new_image_bitmap.width();
src_rect.fBottom = new_image_bitmap.height();
} else {
src_rect.fLeft = dirty->left;
src_rect.fTop = dirty->top;
src_rect.fRight = dirty->right;
src_rect.fBottom = dirty->bottom;
}
SkRect dest_rect = { SkIntToScalar(src_rect.fLeft),
SkIntToScalar(src_rect.fTop),
SkIntToScalar(src_rect.fRight),
SkIntToScalar(src_rect.fBottom) };
// We're guaranteed to have a mapped canvas since we mapped it in Init().
skia::PlatformCanvas* backing_canvas = image_data_->mapped_canvas();
// We want to replace the contents of the bitmap rather than blend.
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
backing_canvas->drawBitmapRect(new_image_bitmap,
&src_rect, dest_rect, &paint);
// TODO(brettw) implement invalidate and callbacks!
// Cause the updated part of the screen to be repainted. This will happen
// asynchronously.
/*
gfx::Rect dest_gfx_rect(dirty->left, dirty->top,
dirty->right - dirty->left,
dirty->bottom - dirty->top);
plugin_delegate_->instance()->webplugin()->InvalidateRect(dest_gfx_rect);
// Save the callback to execute later. See |unpainted_flush_callbacks_| in
// the header file.
if (callback) {
unpainted_flush_callbacks_.push_back(
FlushCallbackData(callback, id, context, user_data));
}
*/
}
void DeviceContext2D::Paint(WebKit::WebCanvas* canvas,
const gfx::Rect& plugin_rect,
const gfx::Rect& paint_rect) {
// We're guaranteed to have a mapped canvas since we mapped it in Init().
const SkBitmap& backing_bitmap = image_data_->GetMappedBitmap();
#if defined(OS_MACOSX)
SkAutoLockPixels lock(backing_bitmap);
scoped_cftyperef<CGDataProviderRef> data_provider(
CGDataProviderCreateWithData(
NULL, backing_bitmap.getAddr32(0, 0),
backing_bitmap.rowBytes() * backing_bitmap.height(), NULL));
scoped_cftyperef<CGImageRef> image(
CGImageCreate(
backing_bitmap.width(), backing_bitmap.height(),
8, 32, backing_bitmap.rowBytes(),
mac_util::GetSystemColorSpace(),
kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host,
data_provider, NULL, false, kCGRenderingIntentDefault));
// Flip the transform
CGContextSaveGState(canvas);
float window_height = static_cast<float>(CGBitmapContextGetHeight(canvas));
CGContextTranslateCTM(canvas, 0, window_height);
CGContextScaleCTM(canvas, 1.0, -1.0);
CGRect bounds;
bounds.origin.x = plugin_rect.origin().x();
bounds.origin.y = window_height - plugin_rect.origin().y() -
backing_bitmap.height();
bounds.size.width = backing_bitmap.width();
bounds.size.height = backing_bitmap.height();
CGContextDrawImage(canvas, bounds, image);
CGContextRestoreGState(canvas);
#else
gfx::Point origin(plugin_rect.origin().x(), plugin_rect.origin().y());
canvas->drawBitmap(backing_bitmap,
SkIntToScalar(plugin_rect.origin().x()),
SkIntToScalar(plugin_rect.origin().y()));
#endif
}
} // namespace pepper
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