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// Copyright (c) 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 "ppapi/cpp/image_data.h"
#include <string.h> // Needed for memset.
#include <algorithm>
#include "ppapi/cpp/instance_handle.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/module_impl.h"
namespace pp {
namespace {
template <> const char* interface_name<PPB_ImageData_1_0>() {
return PPB_IMAGEDATA_INTERFACE_1_0;
}
} // namespace
ImageData::ImageData() : data_(NULL) {
memset(&desc_, 0, sizeof(PP_ImageDataDesc));
}
ImageData::ImageData(const ImageData& other)
: Resource(other),
desc_(other.desc_),
data_(other.data_) {
}
ImageData::ImageData(PassRef, PP_Resource resource)
: Resource(PASS_REF, resource),
data_(NULL) {
memset(&desc_, 0, sizeof(PP_ImageDataDesc));
InitData();
}
ImageData::ImageData(const InstanceHandle& instance,
PP_ImageDataFormat format,
const Size& size,
bool init_to_zero)
: data_(NULL) {
memset(&desc_, 0, sizeof(PP_ImageDataDesc));
if (!has_interface<PPB_ImageData_1_0>())
return;
PassRefFromConstructor(get_interface<PPB_ImageData_1_0>()->Create(
instance.pp_instance(), format, &size.pp_size(),
PP_FromBool(init_to_zero)));
InitData();
}
ImageData& ImageData::operator=(const ImageData& other) {
Resource::operator=(other);
desc_ = other.desc_;
data_ = other.data_;
return *this;
}
const uint32_t* ImageData::GetAddr32(const Point& coord) const {
// Prefer evil const casts rather than evil code duplication.
return const_cast<ImageData*>(this)->GetAddr32(coord);
}
uint32_t* ImageData::GetAddr32(const Point& coord) {
// If we add more image format types that aren't 32-bit, we'd want to check
// here and fail.
return reinterpret_cast<uint32_t*>(
&static_cast<char*>(data())[coord.y() * stride() + coord.x() * 4]);
}
// static
PP_ImageDataFormat ImageData::GetNativeImageDataFormat() {
if (!has_interface<PPB_ImageData_1_0>())
return PP_IMAGEDATAFORMAT_BGRA_PREMUL; // Default to something on failure.
return get_interface<PPB_ImageData_1_0>()->GetNativeImageDataFormat();
}
void ImageData::InitData() {
if (!has_interface<PPB_ImageData_1_0>())
return;
if (!get_interface<PPB_ImageData_1_0>()->Describe(pp_resource(), &desc_) ||
!(data_ = get_interface<PPB_ImageData_1_0>()->Map(pp_resource())))
*this = ImageData();
}
} // namespace pp
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