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#include "cru/platform/graphics/direct2d/ImageFactory.h"
#include "cru/base/platform/win/Exception.h"
#include "cru/base/platform/win/StreamConvert.h"
#include "cru/platform/Check.h"
#include "cru/platform/graphics/direct2d/Exception.h"
#include "cru/platform/graphics/direct2d/Factory.h"
#include "cru/platform/graphics/direct2d/Image.h"
#include <d2d1_1.h>
#include <d2d1_1helper.h>
#include <wincodec.h>
#include <wrl/client.h>
namespace cru::platform::graphics::direct2d {
WinImageFactory::WinImageFactory(DirectGraphicsFactory* graphics_factory)
: DirectGraphicsResource(graphics_factory) {
HRESULT hr =
CoCreateInstance(CLSID_WICImagingFactory, NULL, CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&wic_imaging_factory_));
ThrowIfFailed(hr);
}
WinImageFactory::~WinImageFactory() {}
std::unique_ptr<IImage> WinImageFactory::DecodeFromStream(io::Stream* stream) {
auto graphics_factory = GetDirectFactory();
HRESULT hr;
Microsoft::WRL::ComPtr<IStream> com_stream(
platform::win::ConvertStreamToComStream(stream));
Microsoft::WRL::ComPtr<IWICBitmapDecoder> wic_bitmap_decoder;
hr = wic_imaging_factory_->CreateDecoderFromStream(
com_stream.Get(), NULL, WICDecodeMetadataCacheOnDemand,
&wic_bitmap_decoder);
ThrowIfFailed(hr);
Microsoft::WRL::ComPtr<IWICBitmapFrameDecode> wic_bitmap_frame_decode;
hr = wic_bitmap_decoder->GetFrame(0, &wic_bitmap_frame_decode);
ThrowIfFailed(hr);
auto d2d_context = graphics_factory->GetDefaultD2D1DeviceContext();
Microsoft::WRL::ComPtr<ID2D1Bitmap1> d2d_image;
d2d_context->CreateBitmapFromWicBitmap(
wic_bitmap_frame_decode.Get(),
D2D1::BitmapProperties1(D2D1_BITMAP_OPTIONS_TARGET,
D2D1::PixelFormat(DXGI_FORMAT_B8G8R8A8_UNORM,
D2D1_ALPHA_MODE_PREMULTIPLIED)),
&d2d_image);
return std::make_unique<Direct2DImage>(graphics_factory,
std::move(d2d_image));
}
GUID ConvertImageFormatToGUID(ImageFormat format) {
GUID format_guid;
switch (format) {
case ImageFormat::Png:
format_guid = GUID_ContainerFormatPng;
break;
case ImageFormat::Jpeg:
format_guid = GUID_ContainerFormatJpeg;
break;
case ImageFormat::Gif:
format_guid = GUID_ContainerFormatGif;
break;
default:
throw Exception(u"Unknown image format");
}
return format_guid;
}
void WinImageFactory::EncodeToStream(IImage* image, io::Stream* stream,
ImageFormat format, float quality) {
auto direct_image = CheckPlatform<Direct2DImage>(image, GetPlatformId());
Microsoft::WRL::ComPtr<IStream> com_stream(
platform::win::ConvertStreamToComStream(stream));
auto d2d_bitmap = direct_image->GetD2DBitmap();
auto size = d2d_bitmap->GetPixelSize();
FLOAT dpi_x, dpi_y;
d2d_bitmap->GetDpi(&dpi_x, &dpi_y);
auto pixel_format = d2d_bitmap->GetPixelFormat();
Ensures(pixel_format.format == DXGI_FORMAT_B8G8R8A8_UNORM);
Ensures(pixel_format.alphaMode == D2D1_ALPHA_MODE_PREMULTIPLIED);
Microsoft::WRL::ComPtr<ID2D1Bitmap1> cpu_bitmap;
ThrowIfFailed(GetDirectFactory()->GetDefaultD2D1DeviceContext()->CreateBitmap(
size, nullptr, 0,
D2D1::BitmapProperties1(
D2D1_BITMAP_OPTIONS_CANNOT_DRAW | D2D1_BITMAP_OPTIONS_CPU_READ,
pixel_format, dpi_x, dpi_y),
&cpu_bitmap));
ThrowIfFailed(cpu_bitmap->CopyFromBitmap(nullptr, d2d_bitmap.Get(), nullptr));
D2D1_MAPPED_RECT mapped_rect;
ThrowIfFailed(cpu_bitmap->Map(D2D1_MAP_OPTIONS_READ, &mapped_rect));
Microsoft::WRL::ComPtr<IWICBitmap> wic_bitmap;
ThrowIfFailed(wic_imaging_factory_->CreateBitmapFromMemory(
size.width, size.height, GUID_WICPixelFormat32bppPBGRA, mapped_rect.pitch,
mapped_rect.pitch * size.height, mapped_rect.bits, &wic_bitmap));
ThrowIfFailed(cpu_bitmap->Unmap());
Microsoft::WRL::ComPtr<IWICBitmapEncoder> wic_bitmap_encoder;
ThrowIfFailed(wic_imaging_factory_->CreateEncoder(
ConvertImageFormatToGUID(format), nullptr, &wic_bitmap_encoder));
ThrowIfFailed(wic_bitmap_encoder->Initialize(com_stream.Get(),
WICBitmapEncoderNoCache));
Microsoft::WRL::ComPtr<IWICBitmapFrameEncode> wic_bitmap_frame_encode;
Microsoft::WRL::ComPtr<IPropertyBag2> property_bag;
ThrowIfFailed(wic_bitmap_encoder->CreateNewFrame(&wic_bitmap_frame_encode,
&property_bag));
if (format == ImageFormat::Jpeg) {
PROPBAG2 option = {0};
option.pstrName = const_cast<wchar_t*>(L"ImageQuality");
VARIANT varValue;
VariantInit(&varValue);
varValue.vt = VT_R4;
varValue.fltVal = quality;
ThrowIfFailed(property_bag->Write(1, &option, &varValue));
}
ThrowIfFailed(wic_bitmap_frame_encode->Initialize(property_bag.Get()));
ThrowIfFailed(wic_bitmap_frame_encode->SetResolution(dpi_x, dpi_y));
ThrowIfFailed(wic_bitmap_frame_encode->WriteSource(wic_bitmap.Get(), NULL));
ThrowIfFailed(wic_bitmap_frame_encode->Commit());
ThrowIfFailed(wic_bitmap_encoder->Commit());
}
std::unique_ptr<IImage> WinImageFactory::CreateBitmap(int width, int height) {
if (width <= 0) throw Exception(u"Bitmap width must be greater than 0.");
if (height <= 0) throw Exception(u"Bitmap height must be greater than 0.");
auto graphics_factory = GetDirectFactory();
Microsoft::WRL::ComPtr<ID2D1Bitmap1> bitmap;
auto d2d_context = graphics_factory->GetDefaultD2D1DeviceContext();
ThrowIfFailed(d2d_context->CreateBitmap(
D2D1::SizeU(width, height), nullptr, 0,
D2D1::BitmapProperties1(D2D1_BITMAP_OPTIONS_TARGET,
D2D1::PixelFormat(DXGI_FORMAT_B8G8R8A8_UNORM,
D2D1_ALPHA_MODE_PREMULTIPLIED)),
&bitmap));
return std::make_unique<Direct2DImage>(graphics_factory, std::move(bitmap));
}
} // namespace cru::platform::graphics::direct2d
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