1 files changed, 159 insertions, 0 deletions
diff --git a/webkit/glue/plugins/pepper_image_data.cc b/webkit/glue/plugins/pepper_image_data.cc
new file mode 100644
index 0000000..8288fe2
--- /dev/null
+++ b/webkit/glue/plugins/pepper_image_data.cc
@@ -0,0 +1,159 @@
+// 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 <algorithm>
+#include <limits>
+
+#include "base/logging.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"
+
+namespace pepper {
+
+namespace {
+
+PP_ImageDataFormat GetNativeImageDataFormat() {
+  return PP_IMAGEDATAFORMAT_BGRA_PREMUL;
+}
+
+PP_Resource Create(PP_Module module_id,
+                   PP_ImageDataFormat format,
+                   const PP_Size* size,
+                   bool init_to_zero) {
+  PluginModule* module = PluginModule::FromPPModule(module_id);
+  if (!module)
+    return NULL;
+
+  scoped_refptr<ImageData> data(new ImageData(module));
+  if (!data->Init(format, size->width, size->height, init_to_zero))
+    return NULL;
+
+  return data->GetReference();
+}
+
+bool IsImageData(PP_Resource resource) {
+  return !!Resource::GetAs<ImageData>(resource);
+}
+
+bool Describe(PP_Resource resource, PP_ImageDataDesc* desc) {
+  // Give predictable values on failure.
+  memset(desc, 0, sizeof(PP_ImageDataDesc));
+
+  scoped_refptr<ImageData> image_data(Resource::GetAs<ImageData>(resource));
+  if (!image_data)
+    return false;
+  image_data->Describe(desc);
+  return true;
+}
+
+void* Map(PP_Resource resource) {
+  scoped_refptr<ImageData> image_data(Resource::GetAs<ImageData>(resource));
+  if (!image_data)
+    return NULL;
+  return image_data->Map();
+}
+
+void Unmap(PP_Resource resource) {
+  scoped_refptr<ImageData> image_data(Resource::GetAs<ImageData>(resource));
+  if (image_data)
+    image_data->Unmap();
+}
+
+const PPB_ImageData ppb_imagedata = {
+  &GetNativeImageDataFormat,
+  &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,
+                     bool init_to_zero) {
+  // TODO(brettw) this should be called only on the main thread!
+  // TODO(brettw) use init_to_zero when we implement caching.
+  if (format != PP_IMAGEDATAFORMAT_BGRA_PREMUL)
+    return false;  // Only support this one format for now.
+  if (width <= 0 || height <= 0)
+    return false;
+  if (static_cast<int64>(width) * static_cast<int64>(height) >=
+      std::numeric_limits<int32>::max())
+    return false;  // Prevent overflow of signed 32-bit ints.
+
+  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->size.width = width_;
+  desc->size.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 {
+  if (!mapped_canvas_.get())
+    return NULL;
+  return &mapped_canvas_->getTopPlatformDevice().accessBitmap(false);
+}
+
+void ImageData::Swap(ImageData* other) {
+  swap(other->platform_image_, platform_image_);
+  swap(other->mapped_canvas_, mapped_canvas_);
+  std::swap(other->width_, width_);
+  std::swap(other->height_, height_);
+}
+
+}  // namespace pepper