static int HasAlpha(IWICImagingFactory* const factory,
IWICBitmapDecoder* const decoder,
IWICBitmapFrameDecode* const frame,
GUID pixel_format) {
int has_alpha;
if (HasPalette(pixel_format)) {
IWICPalette* frame_palette = NULL;
IWICPalette* global_palette = NULL;
BOOL frame_palette_has_alpha = FALSE;
BOOL global_palette_has_alpha = FALSE;
// A palette may exist at the frame or container level,
// check IWICPalette::HasAlpha() for both if present.
if (SUCCEEDED(IWICImagingFactory_CreatePalette(factory, &frame_palette)) &&
SUCCEEDED(IWICBitmapFrameDecode_CopyPalette(frame, frame_palette))) {
IWICPalette_HasAlpha(frame_palette, &frame_palette_has_alpha);
}
if (SUCCEEDED(IWICImagingFactory_CreatePalette(factory, &global_palette)) &&
SUCCEEDED(IWICBitmapDecoder_CopyPalette(decoder, global_palette))) {
IWICPalette_HasAlpha(global_palette, &global_palette_has_alpha);
}
has_alpha = frame_palette_has_alpha || global_palette_has_alpha;
if (frame_palette != NULL) IUnknown_Release(frame_palette);
if (global_palette != NULL) IUnknown_Release(global_palette);
} else {
has_alpha = IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat32bppRGBA_)) ||
IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat32bppBGRA_));
}
return has_alpha;
}
static int HasPalette(GUID pixel_format) {
return (IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat1bppIndexed)) ||
IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat2bppIndexed)) ||
IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat4bppIndexed)) ||
IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat8bppIndexed)));
}
static HRESULT WriteUsingWIC(const char* out_file_name, REFGUID container_guid,
unsigned char* rgb, int stride,
uint32_t width, uint32_t height, int has_alpha) {
HRESULT hr = S_OK;
IWICImagingFactory* factory = NULL;
IWICBitmapFrameEncode* frame = NULL;
IWICBitmapEncoder* encoder = NULL;
IStream* stream = NULL;
WICPixelFormatGUID pixel_format = has_alpha ? GUID_WICPixelFormat32bppBGRA
: GUID_WICPixelFormat24bppBGR;
IFS(CoInitialize(NULL));
IFS(CoCreateInstance(MAKE_REFGUID(CLSID_WICImagingFactory), NULL,
CLSCTX_INPROC_SERVER,
MAKE_REFGUID(IID_IWICImagingFactory),
(LPVOID*)&factory));
if (hr == REGDB_E_CLASSNOTREG) {
fprintf(stderr,
"Couldn't access Windows Imaging Component (are you running "
"Windows XP SP3 or newer?). PNG support not available. "
"Use -ppm or -pgm for available PPM and PGM formats.\n");
}
IFS(CreateOutputStream(out_file_name, &stream));
IFS(IWICImagingFactory_CreateEncoder(factory, container_guid, NULL,
&encoder));
IFS(IWICBitmapEncoder_Initialize(encoder, stream,
WICBitmapEncoderNoCache));
IFS(IWICBitmapEncoder_CreateNewFrame(encoder, &frame, NULL));
IFS(IWICBitmapFrameEncode_Initialize(frame, NULL));
IFS(IWICBitmapFrameEncode_SetSize(frame, width, height));
IFS(IWICBitmapFrameEncode_SetPixelFormat(frame, &pixel_format));
IFS(IWICBitmapFrameEncode_WritePixels(frame, height, stride,
height * stride, rgb));
IFS(IWICBitmapFrameEncode_Commit(frame));
IFS(IWICBitmapEncoder_Commit(encoder));
if (frame != NULL) IUnknown_Release(frame);
if (encoder != NULL) IUnknown_Release(encoder);
if (factory != NULL) IUnknown_Release(factory);
if (stream != NULL) IUnknown_Release(stream);
return hr;
}
static int WritePNG(const char* out_file_name, int use_stdout,
const WebPDecBuffer* const buffer) {
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
uint8_t* const rgb = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const int has_alpha = (buffer->colorspace == MODE_BGRA);
return SUCCEEDED(WriteUsingWIC(out_file_name, use_stdout,
MAKE_REFGUID(GUID_ContainerFormatPng),
rgb, stride, width, height, has_alpha));
}
static HRESULT WriteUsingWIC(const char* out_file_name, int use_stdout,
REFGUID container_guid,
uint8_t* rgb, int stride,
uint32_t width, uint32_t height, int has_alpha) {
HRESULT hr = S_OK;
IWICImagingFactory* factory = NULL;
IWICBitmapFrameEncode* frame = NULL;
IWICBitmapEncoder* encoder = NULL;
IStream* stream = NULL;
WICPixelFormatGUID pixel_format = has_alpha ? GUID_WICPixelFormat32bppBGRA
: GUID_WICPixelFormat24bppBGR;
IFS(CoInitialize(NULL));
IFS(CoCreateInstance(MAKE_REFGUID(CLSID_WICImagingFactory), NULL,
CLSCTX_INPROC_SERVER,
MAKE_REFGUID(IID_IWICImagingFactory),
(LPVOID*)&factory));
if (hr == REGDB_E_CLASSNOTREG) {
fprintf(stderr,
"Couldn't access Windows Imaging Component (are you running "
"Windows XP SP3 or newer?). PNG support not available. "
"Use -ppm or -pgm for available PPM and PGM formats.\n");
}
IFS(CreateOutputStream(out_file_name, use_stdout, &stream));
IFS(IWICImagingFactory_CreateEncoder(factory, container_guid, NULL,
&encoder));
IFS(IWICBitmapEncoder_Initialize(encoder, stream,
WICBitmapEncoderNoCache));
IFS(IWICBitmapEncoder_CreateNewFrame(encoder, &frame, NULL));
IFS(IWICBitmapFrameEncode_Initialize(frame, NULL));
IFS(IWICBitmapFrameEncode_SetSize(frame, width, height));
IFS(IWICBitmapFrameEncode_SetPixelFormat(frame, &pixel_format));
IFS(IWICBitmapFrameEncode_WritePixels(frame, height, stride,
height * stride, rgb));
IFS(IWICBitmapFrameEncode_Commit(frame));
IFS(IWICBitmapEncoder_Commit(encoder));
if (SUCCEEDED(hr) && use_stdout) {
HGLOBAL image;
IFS(GetHGlobalFromStream(stream, &image));
if (SUCCEEDED(hr)) {
HANDLE std_output = GetStdHandle(STD_OUTPUT_HANDLE);
DWORD mode;
const BOOL update_mode = GetConsoleMode(std_output, &mode);
const void* const image_mem = GlobalLock(image);
DWORD bytes_written = 0;
// Clear output processing if necessary, then output the image.
if (update_mode) SetConsoleMode(std_output, 0);
if (!WriteFile(std_output, image_mem, (DWORD)GlobalSize(image),
&bytes_written, NULL) ||
bytes_written != GlobalSize(image)) {
hr = E_FAIL;
}
if (update_mode) SetConsoleMode(std_output, mode);
GlobalUnlock(image);
}
}
if (frame != NULL) IUnknown_Release(frame);
if (encoder != NULL) IUnknown_Release(encoder);
if (factory != NULL) IUnknown_Release(factory);
if (stream != NULL) IUnknown_Release(stream);
return hr;
}
int ReadPictureWithWIC(const char* const filename,
WebPPicture* const pic, int keep_alpha,
Metadata* const metadata) {
// From Microsoft SDK 6.0a -- ks.h
// Define a local copy to avoid link errors under mingw.
WEBP_DEFINE_GUID(GUID_NULL_, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
static const WICFormatImporter kAlphaFormatImporters[] = {
{ &GUID_WICPixelFormat32bppBGRA_, 4, WebPPictureImportBGRA },
{ &GUID_WICPixelFormat32bppRGBA_, 4, WebPPictureImportRGBA },
{ NULL, 0, NULL },
};
static const WICFormatImporter kNonAlphaFormatImporters[] = {
{ &GUID_WICPixelFormat24bppBGR_, 3, WebPPictureImportBGR },
{ &GUID_WICPixelFormat24bppRGB_, 3, WebPPictureImportRGB },
{ NULL, 0, NULL },
};
HRESULT hr = S_OK;
IWICBitmapFrameDecode* frame = NULL;
IWICFormatConverter* converter = NULL;
IWICImagingFactory* factory = NULL;
IWICBitmapDecoder* decoder = NULL;
IStream* stream = NULL;
UINT frame_count = 0;
UINT width = 0, height = 0;
BYTE* rgb = NULL;
WICPixelFormatGUID src_pixel_format = GUID_WICPixelFormatUndefined;
const WICFormatImporter* importer = NULL;
GUID src_container_format = GUID_NULL_;
static const GUID* kAlphaContainers[] = {
&GUID_ContainerFormatBmp,
&GUID_ContainerFormatPng,
&GUID_ContainerFormatTiff,
NULL
};
int has_alpha = 0;
int64_t stride;
IFS(CoInitialize(NULL));
IFS(CoCreateInstance(MAKE_REFGUID(CLSID_WICImagingFactory), NULL,
CLSCTX_INPROC_SERVER,
MAKE_REFGUID(IID_IWICImagingFactory),
(LPVOID*)&factory));
if (hr == REGDB_E_CLASSNOTREG) {
fprintf(stderr,
"Couldn't access Windows Imaging Component (are you running "
"Windows XP SP3 or newer?). Most formats not available. "
"Use -s for the available YUV input.\n");
}
// Prepare for image decoding.
IFS(OpenInputStream(filename, &stream));
IFS(IWICImagingFactory_CreateDecoderFromStream(
factory, stream, NULL,
WICDecodeMetadataCacheOnDemand, &decoder));
IFS(IWICBitmapDecoder_GetFrameCount(decoder, &frame_count));
if (SUCCEEDED(hr) && frame_count == 0) {
fprintf(stderr, "No frame found in input file.\n");
hr = E_FAIL;
}
IFS(IWICBitmapDecoder_GetFrame(decoder, 0, &frame));
IFS(IWICBitmapFrameDecode_GetPixelFormat(frame, &src_pixel_format));
IFS(IWICBitmapDecoder_GetContainerFormat(decoder, &src_container_format));
if (SUCCEEDED(hr) && keep_alpha) {
const GUID** guid;
for (guid = kAlphaContainers; *guid != NULL; ++guid) {
if (IsEqualGUID(MAKE_REFGUID(src_container_format),
MAKE_REFGUID(**guid))) {
has_alpha = HasAlpha(factory, decoder, frame, src_pixel_format);
break;
}
}
}
// Prepare for pixel format conversion (if necessary).
IFS(IWICImagingFactory_CreateFormatConverter(factory, &converter));
for (importer = has_alpha ? kAlphaFormatImporters : kNonAlphaFormatImporters;
hr == S_OK && importer->import != NULL; ++importer) {
BOOL can_convert;
const HRESULT cchr = IWICFormatConverter_CanConvert(
converter,
MAKE_REFGUID(src_pixel_format),
MAKE_REFGUID(*importer->pixel_format),
&can_convert);
if (SUCCEEDED(cchr) && can_convert) break;
}
if (importer->import == NULL) hr = E_FAIL;
IFS(IWICFormatConverter_Initialize(converter, (IWICBitmapSource*)frame,
importer->pixel_format,
WICBitmapDitherTypeNone,
NULL, 0.0, WICBitmapPaletteTypeCustom));
// Decode.
IFS(IWICFormatConverter_GetSize(converter, &width, &height));
stride = (int64_t)importer->bytes_per_pixel * width * sizeof(*rgb);
if (stride != (int)stride ||
!ImgIoUtilCheckSizeArgumentsOverflow(stride, height)) {
hr = E_FAIL;
}
if (SUCCEEDED(hr)) {
rgb = (BYTE*)malloc((size_t)stride * height);
if (rgb == NULL)
hr = E_OUTOFMEMORY;
}
IFS(IWICFormatConverter_CopyPixels(converter, NULL,
(UINT)stride, (UINT)stride * height, rgb));
// WebP conversion.
if (SUCCEEDED(hr)) {
int ok;
pic->width = width;
pic->height = height;
pic->use_argb = 1; // For WIC, we always force to argb
ok = importer->import(pic, rgb, (int)stride);
if (!ok) hr = E_FAIL;
}
if (SUCCEEDED(hr)) {
if (metadata != NULL) {
hr = ExtractMetadata(factory, frame, metadata);
if (FAILED(hr)) {
fprintf(stderr, "Error extracting image metadata using WIC!\n");
}
}
}
// Cleanup.
if (converter != NULL) IUnknown_Release(converter);
if (frame != NULL) IUnknown_Release(frame);
if (decoder != NULL) IUnknown_Release(decoder);
if (factory != NULL) IUnknown_Release(factory);
if (stream != NULL) IUnknown_Release(stream);
free(rgb);
return SUCCEEDED(hr);
}
static HRESULT ReadPictureWithWIC(const char* filename,
WebPPicture* const pic, int keep_alpha) {
HRESULT hr = S_OK;
IWICBitmapFrameDecode* pFrame = NULL;
IWICFormatConverter* pConverter = NULL;
IWICImagingFactory* pFactory = NULL;
IWICBitmapDecoder* pDecoder = NULL;
IStream* pStream = NULL;
UINT frameCount = 0;
UINT width, height = 0;
BYTE* rgb = NULL;
WICPixelFormatGUID srcPixelFormat = { 0 };
GUID srcContainerFormat = { 0 };
const GUID* alphaContainers[] = {
&GUID_ContainerFormatBmp,
&GUID_ContainerFormatPng,
&GUID_ContainerFormatTiff
};
int has_alpha = 0;
int i, stride;
IFS(CoInitialize(NULL));
IFS(CoCreateInstance(MAKE_REFGUID(CLSID_WICImagingFactory), NULL,
CLSCTX_INPROC_SERVER, MAKE_REFGUID(IID_IWICImagingFactory),
(LPVOID*)&pFactory));
if (hr == REGDB_E_CLASSNOTREG) {
printf("Couldn't access Windows Imaging Component (are you running \n");
printf("Windows XP SP3 or newer?). Most formats not available.\n");
printf("Use -s for the available YUV input.\n");
}
// Prepare for image decoding.
IFS(OpenInputStream(filename, &pStream));
IFS(IWICImagingFactory_CreateDecoderFromStream(pFactory, pStream, NULL,
WICDecodeMetadataCacheOnDemand, &pDecoder));
IFS(IWICBitmapDecoder_GetFrameCount(pDecoder, &frameCount));
if (SUCCEEDED(hr) && frameCount == 0) {
printf("No frame found in input file.\n");
hr = E_FAIL;
}
IFS(IWICBitmapDecoder_GetFrame(pDecoder, 0, &pFrame));
IFS(IWICBitmapFrameDecode_GetPixelFormat(pFrame, &srcPixelFormat));
IFS(IWICBitmapDecoder_GetContainerFormat(pDecoder, &srcContainerFormat));
has_alpha = keep_alpha;
for (i = 0;
has_alpha && i < sizeof(alphaContainers)/sizeof(alphaContainers[0]);
++i) {
if (IsEqualGUID(&srcContainerFormat, alphaContainers[i])) {
has_alpha =
IsEqualGUID(&srcPixelFormat, &GUID_WICPixelFormat32bppRGBA) ||
IsEqualGUID(&srcPixelFormat, &GUID_WICPixelFormat32bppBGRA);
break;
}
}
// Prepare for pixel format conversion (if necessary).
IFS(IWICImagingFactory_CreateFormatConverter(pFactory, &pConverter));
IFS(IWICFormatConverter_Initialize(pConverter, (IWICBitmapSource*)pFrame,
has_alpha ? MAKE_REFGUID(GUID_WICPixelFormat32bppRGBA)
: MAKE_REFGUID(GUID_WICPixelFormat24bppRGB),
WICBitmapDitherTypeNone,
NULL, 0.0, WICBitmapPaletteTypeCustom));
// Decode.
IFS(IWICFormatConverter_GetSize(pConverter, &width, &height));
stride = (has_alpha ? 4 : 3) * width * sizeof(*rgb);
if (SUCCEEDED(hr)) {
rgb = (BYTE*)malloc(stride * height);
if (rgb == NULL)
hr = E_OUTOFMEMORY;
}
IFS(IWICFormatConverter_CopyPixels(pConverter, NULL, stride,
stride * height, rgb));
// WebP conversion.
if (SUCCEEDED(hr)) {
int ok;
#ifdef WEBP_EXPERIMENTAL_FEATURES
if (has_alpha) {
pic->colorspace |= WEBP_CSP_ALPHA_BIT;
}
#endif
pic->width = width;
pic->height = height;
ok = has_alpha ? WebPPictureImportRGBA(pic, rgb, stride)
: WebPPictureImportRGB(pic, rgb, stride);
if (!ok)
hr = E_FAIL;
}
// Cleanup.
if (pConverter != NULL) IUnknown_Release(pConverter);
if (pFrame != NULL) IUnknown_Release(pFrame);
if (pDecoder != NULL) IUnknown_Release(pDecoder);
if (pFactory != NULL) IUnknown_Release(pFactory);
if (pStream != NULL) IUnknown_Release(pStream);
free(rgb);
return hr;
}