Google Git
Sign in
goma / wine / 307b3c8ed59acf2de2a049d27b5784a6a97733e6 / . / dlls / windowscodecs / pngformat.c
blob: 1ab2c8573b0ece9410acda48b9661d5586c9ca56 [file] [log] [blame]
/*
* Copyright 2009 Vincent Povirk for CodeWeavers
* Copyright 2016 Dmitry Timoshkov
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#ifdef HAVE_PNG_H
#include <png.h>
#endif
#define NONAMELESSUNION
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "objbase.h"
#include "wincodecs_private.h"
#include "wine/debug.h"
#include "wine/library.h"
WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
static inline ULONG read_ulong_be(BYTE* data)
{
return data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
}
static HRESULT read_png_chunk(IStream *stream, BYTE *type, BYTE **data, ULONG *data_size)
{
BYTE header[8];
HRESULT hr;
ULONG bytesread;
hr = IStream_Read(stream, header, 8, &bytesread);
if (FAILED(hr) || bytesread < 8)
{
if (SUCCEEDED(hr))
hr = E_FAIL;
return hr;
}
*data_size = read_ulong_be(&header[0]);
memcpy(type, &header[4], 4);
if (data)
{
*data = HeapAlloc(GetProcessHeap(), 0, *data_size);
if (!*data)
return E_OUTOFMEMORY;
hr = IStream_Read(stream, *data, *data_size, &bytesread);
if (FAILED(hr) || bytesread < *data_size)
{
if (SUCCEEDED(hr))
hr = E_FAIL;
HeapFree(GetProcessHeap(), 0, *data);
*data = NULL;
return hr;
}
/* Windows ignores CRC of the chunk */
}
return S_OK;
}
static HRESULT LoadTextMetadata(IStream *stream, const GUID *preferred_vendor,
DWORD persist_options, MetadataItem **items, DWORD *item_count)
{
HRESULT hr;
BYTE type[4];
BYTE *data;
ULONG data_size;
ULONG name_len, value_len;
BYTE *name_end_ptr;
LPSTR name, value;
MetadataItem *result;
hr = read_png_chunk(stream, type, &data, &data_size);
if (FAILED(hr)) return hr;
name_end_ptr = memchr(data, 0, data_size);
name_len = name_end_ptr - data;
if (!name_end_ptr || name_len > 79)
{
HeapFree(GetProcessHeap(), 0, data);
return E_FAIL;
}
value_len = data_size - name_len - 1;
result = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(MetadataItem));
name = HeapAlloc(GetProcessHeap(), 0, name_len + 1);
value = HeapAlloc(GetProcessHeap(), 0, value_len + 1);
if (!result || !name || !value)
{
HeapFree(GetProcessHeap(), 0, data);
HeapFree(GetProcessHeap(), 0, result);
HeapFree(GetProcessHeap(), 0, name);
HeapFree(GetProcessHeap(), 0, value);
return E_OUTOFMEMORY;
}
PropVariantInit(&result[0].schema);
PropVariantInit(&result[0].id);
PropVariantInit(&result[0].value);
memcpy(name, data, name_len + 1);
memcpy(value, name_end_ptr + 1, value_len);
value[value_len] = 0;
result[0].id.vt = VT_LPSTR;
result[0].id.u.pszVal = name;
result[0].value.vt = VT_LPSTR;
result[0].value.u.pszVal = value;
*items = result;
*item_count = 1;
HeapFree(GetProcessHeap(), 0, data);
return S_OK;
}
static const MetadataHandlerVtbl TextReader_Vtbl = {
0,
&CLSID_WICPngTextMetadataReader,
LoadTextMetadata
};
HRESULT PngTextReader_CreateInstance(REFIID iid, void** ppv)
{
return MetadataReader_Create(&TextReader_Vtbl, iid, ppv);
}
static HRESULT LoadGamaMetadata(IStream *stream, const GUID *preferred_vendor,
DWORD persist_options, MetadataItem **items, DWORD *item_count)
{
HRESULT hr;
BYTE type[4];
BYTE *data;
ULONG data_size;
ULONG gamma;
static const WCHAR ImageGamma[] = {'I','m','a','g','e','G','a','m','m','a',0};
LPWSTR name;
MetadataItem *result;
hr = read_png_chunk(stream, type, &data, &data_size);
if (FAILED(hr)) return hr;
if (data_size < 4)
{
HeapFree(GetProcessHeap(), 0, data);
return E_FAIL;
}
gamma = read_ulong_be(data);
HeapFree(GetProcessHeap(), 0, data);
result = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(MetadataItem));
name = HeapAlloc(GetProcessHeap(), 0, sizeof(ImageGamma));
if (!result || !name)
{
HeapFree(GetProcessHeap(), 0, result);
HeapFree(GetProcessHeap(), 0, name);
return E_OUTOFMEMORY;
}
PropVariantInit(&result[0].schema);
PropVariantInit(&result[0].id);
PropVariantInit(&result[0].value);
memcpy(name, ImageGamma, sizeof(ImageGamma));
result[0].id.vt = VT_LPWSTR;
result[0].id.u.pwszVal = name;
result[0].value.vt = VT_UI4;
result[0].value.u.ulVal = gamma;
*items = result;
*item_count = 1;
return S_OK;
}
static const MetadataHandlerVtbl GamaReader_Vtbl = {
0,
&CLSID_WICPngGamaMetadataReader,
LoadGamaMetadata
};
HRESULT PngGamaReader_CreateInstance(REFIID iid, void** ppv)
{
return MetadataReader_Create(&GamaReader_Vtbl, iid, ppv);
}
static HRESULT LoadChrmMetadata(IStream *stream, const GUID *preferred_vendor,
DWORD persist_options, MetadataItem **items, DWORD *item_count)
{
HRESULT hr;
BYTE type[4];
BYTE *data;
ULONG data_size;
static const WCHAR names[8][12] = {
{'W','h','i','t','e','P','o','i','n','t','X',0},
{'W','h','i','t','e','P','o','i','n','t','Y',0},
{'R','e','d','X',0},
{'R','e','d','Y',0},
{'G','r','e','e','n','X',0},
{'G','r','e','e','n','Y',0},
{'B','l','u','e','X',0},
{'B','l','u','e','Y',0},
};
LPWSTR dyn_names[8] = {0};
MetadataItem *result;
int i;
hr = read_png_chunk(stream, type, &data, &data_size);
if (FAILED(hr)) return hr;
if (data_size < 32)
{
HeapFree(GetProcessHeap(), 0, data);
return E_FAIL;
}
result = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(MetadataItem)*8);
for (i=0; i<8; i++)
{
dyn_names[i] = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR)*(lstrlenW(names[i])+1));
if (!dyn_names[i]) break;
}
if (!result || i < 8)
{
HeapFree(GetProcessHeap(), 0, result);
for (i=0; i<8; i++)
HeapFree(GetProcessHeap(), 0, dyn_names[i]);
HeapFree(GetProcessHeap(), 0, data);
return E_OUTOFMEMORY;
}
for (i=0; i<8; i++)
{
PropVariantInit(&result[i].schema);
PropVariantInit(&result[i].id);
result[i].id.vt = VT_LPWSTR;
result[i].id.u.pwszVal = dyn_names[i];
lstrcpyW(dyn_names[i], names[i]);
PropVariantInit(&result[i].value);
result[i].value.vt = VT_UI4;
result[i].value.u.ulVal = read_ulong_be(&data[i*4]);
}
*items = result;
*item_count = 8;
HeapFree(GetProcessHeap(), 0, data);
return S_OK;
}
static const MetadataHandlerVtbl ChrmReader_Vtbl = {
0,
&CLSID_WICPngChrmMetadataReader,
LoadChrmMetadata
};
HRESULT PngChrmReader_CreateInstance(REFIID iid, void** ppv)
{
return MetadataReader_Create(&ChrmReader_Vtbl, iid, ppv);
}
#ifdef SONAME_LIBPNG
static void *libpng_handle;
#define MAKE_FUNCPTR(f) static typeof(f) * p##f
MAKE_FUNCPTR(png_create_read_struct);
MAKE_FUNCPTR(png_create_info_struct);
MAKE_FUNCPTR(png_create_write_struct);
MAKE_FUNCPTR(png_destroy_read_struct);
MAKE_FUNCPTR(png_destroy_write_struct);
MAKE_FUNCPTR(png_error);
MAKE_FUNCPTR(png_get_bit_depth);
MAKE_FUNCPTR(png_get_color_type);
MAKE_FUNCPTR(png_get_error_ptr);
MAKE_FUNCPTR(png_get_iCCP);
MAKE_FUNCPTR(png_get_image_height);
MAKE_FUNCPTR(png_get_image_width);
MAKE_FUNCPTR(png_get_io_ptr);
MAKE_FUNCPTR(png_get_pHYs);
MAKE_FUNCPTR(png_get_PLTE);
MAKE_FUNCPTR(png_get_tRNS);
MAKE_FUNCPTR(png_set_bgr);
MAKE_FUNCPTR(png_set_crc_action);
MAKE_FUNCPTR(png_set_error_fn);
MAKE_FUNCPTR(png_set_filler);
MAKE_FUNCPTR(png_set_filter);
MAKE_FUNCPTR(png_set_gray_to_rgb);
MAKE_FUNCPTR(png_set_interlace_handling);
MAKE_FUNCPTR(png_set_IHDR);
MAKE_FUNCPTR(png_set_pHYs);
MAKE_FUNCPTR(png_set_PLTE);
MAKE_FUNCPTR(png_set_read_fn);
MAKE_FUNCPTR(png_set_strip_16);
MAKE_FUNCPTR(png_set_tRNS);
MAKE_FUNCPTR(png_set_tRNS_to_alpha);
MAKE_FUNCPTR(png_set_write_fn);
MAKE_FUNCPTR(png_read_end);
MAKE_FUNCPTR(png_read_image);
MAKE_FUNCPTR(png_read_info);
MAKE_FUNCPTR(png_write_end);
MAKE_FUNCPTR(png_write_info);
MAKE_FUNCPTR(png_write_rows);
#undef MAKE_FUNCPTR
static CRITICAL_SECTION init_png_cs;
static CRITICAL_SECTION_DEBUG init_png_cs_debug =
{
0, 0, &init_png_cs,
{ &init_png_cs_debug.ProcessLocksList,
&init_png_cs_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": init_png_cs") }
};
static CRITICAL_SECTION init_png_cs = { &init_png_cs_debug, -1, 0, 0, 0, 0 };
static const WCHAR wszPngInterlaceOption[] = {'I','n','t','e','r','l','a','c','e','O','p','t','i','o','n',0};
static const WCHAR wszPngFilterOption[] = {'F','i','l','t','e','r','O','p','t','i','o','n',0};
static void *load_libpng(void)
{
void *result;
EnterCriticalSection(&init_png_cs);
if(!libpng_handle && (libpng_handle = wine_dlopen(SONAME_LIBPNG, RTLD_NOW, NULL, 0)) != NULL) {
#define LOAD_FUNCPTR(f) \
if((p##f = wine_dlsym(libpng_handle, #f, NULL, 0)) == NULL) { \
libpng_handle = NULL; \
LeaveCriticalSection(&init_png_cs); \
return NULL; \
}
LOAD_FUNCPTR(png_create_read_struct);
LOAD_FUNCPTR(png_create_info_struct);
LOAD_FUNCPTR(png_create_write_struct);
LOAD_FUNCPTR(png_destroy_read_struct);
LOAD_FUNCPTR(png_destroy_write_struct);
LOAD_FUNCPTR(png_error);
LOAD_FUNCPTR(png_get_bit_depth);
LOAD_FUNCPTR(png_get_color_type);
LOAD_FUNCPTR(png_get_error_ptr);
LOAD_FUNCPTR(png_get_iCCP);
LOAD_FUNCPTR(png_get_image_height);
LOAD_FUNCPTR(png_get_image_width);
LOAD_FUNCPTR(png_get_io_ptr);
LOAD_FUNCPTR(png_get_pHYs);
LOAD_FUNCPTR(png_get_PLTE);
LOAD_FUNCPTR(png_get_tRNS);
LOAD_FUNCPTR(png_set_bgr);
LOAD_FUNCPTR(png_set_crc_action);
LOAD_FUNCPTR(png_set_error_fn);
LOAD_FUNCPTR(png_set_filler);
LOAD_FUNCPTR(png_set_filter);
LOAD_FUNCPTR(png_set_gray_to_rgb);
LOAD_FUNCPTR(png_set_interlace_handling);
LOAD_FUNCPTR(png_set_IHDR);
LOAD_FUNCPTR(png_set_pHYs);
LOAD_FUNCPTR(png_set_PLTE);
LOAD_FUNCPTR(png_set_read_fn);
LOAD_FUNCPTR(png_set_strip_16);
LOAD_FUNCPTR(png_set_tRNS);
LOAD_FUNCPTR(png_set_tRNS_to_alpha);
LOAD_FUNCPTR(png_set_write_fn);
LOAD_FUNCPTR(png_read_end);
LOAD_FUNCPTR(png_read_image);
LOAD_FUNCPTR(png_read_info);
LOAD_FUNCPTR(png_write_end);
LOAD_FUNCPTR(png_write_info);
LOAD_FUNCPTR(png_write_rows);
#undef LOAD_FUNCPTR
}
result = libpng_handle;
LeaveCriticalSection(&init_png_cs);
return result;
}
static void user_error_fn(png_structp png_ptr, png_const_charp error_message)
{
jmp_buf *pjmpbuf;
/* This uses setjmp/longjmp just like the default. We can't use the
* default because there's no way to access the jmp buffer in the png_struct
* that works in 1.2 and 1.4 and allows us to dynamically load libpng. */
WARN("PNG error: %s\n", debugstr_a(error_message));
pjmpbuf = ppng_get_error_ptr(png_ptr);
longjmp(*pjmpbuf, 1);
}
static void user_warning_fn(png_structp png_ptr, png_const_charp warning_message)
{
WARN("PNG warning: %s\n", debugstr_a(warning_message));
}
typedef struct {
ULARGE_INTEGER ofs, len;
IWICMetadataReader* reader;
} metadata_block_info;
typedef struct {
IWICBitmapDecoder IWICBitmapDecoder_iface;
IWICBitmapFrameDecode IWICBitmapFrameDecode_iface;
IWICMetadataBlockReader IWICMetadataBlockReader_iface;
LONG ref;
IStream *stream;
png_structp png_ptr;
png_infop info_ptr;
png_infop end_info;
BOOL initialized;
int bpp;
int width, height;
UINT stride;
const WICPixelFormatGUID *format;
BYTE *image_bits;
CRITICAL_SECTION lock; /* must be held when png structures are accessed or initialized is set */
ULONG metadata_count;
metadata_block_info* metadata_blocks;
} PngDecoder;
static inline PngDecoder *impl_from_IWICBitmapDecoder(IWICBitmapDecoder *iface)
{
return CONTAINING_RECORD(iface, PngDecoder, IWICBitmapDecoder_iface);
}
static inline PngDecoder *impl_from_IWICBitmapFrameDecode(IWICBitmapFrameDecode *iface)
{
return CONTAINING_RECORD(iface, PngDecoder, IWICBitmapFrameDecode_iface);
}
static inline PngDecoder *impl_from_IWICMetadataBlockReader(IWICMetadataBlockReader *iface)
{
return CONTAINING_RECORD(iface, PngDecoder, IWICMetadataBlockReader_iface);
}
static const IWICBitmapFrameDecodeVtbl PngDecoder_FrameVtbl;
static HRESULT WINAPI PngDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
void **ppv)
{
PngDecoder *This = impl_from_IWICBitmapDecoder(iface);
TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) || IsEqualIID(&IID_IWICBitmapDecoder, iid))
{
*ppv = &This->IWICBitmapDecoder_iface;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI PngDecoder_AddRef(IWICBitmapDecoder *iface)
{
PngDecoder *This = impl_from_IWICBitmapDecoder(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI PngDecoder_Release(IWICBitmapDecoder *iface)
{
PngDecoder *This = impl_from_IWICBitmapDecoder(iface);
ULONG ref = InterlockedDecrement(&This->ref);
ULONG i;
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
if (This->stream)
IStream_Release(This->stream);
if (This->png_ptr)
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, &This->end_info);
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, This->image_bits);
for (i=0; i<This->metadata_count; i++)
{
if (This->metadata_blocks[i].reader)
IWICMetadataReader_Release(This->metadata_blocks[i].reader);
}
HeapFree(GetProcessHeap(), 0, This->metadata_blocks);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI PngDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *stream,
DWORD *capability)
{
HRESULT hr;
TRACE("(%p,%p,%p)\n", iface, stream, capability);
if (!stream || !capability) return E_INVALIDARG;
hr = IWICBitmapDecoder_Initialize(iface, stream, WICDecodeMetadataCacheOnDemand);
if (hr != S_OK) return hr;
*capability = WICBitmapDecoderCapabilityCanDecodeAllImages |
WICBitmapDecoderCapabilityCanDecodeSomeImages;
/* FIXME: WICBitmapDecoderCapabilityCanEnumerateMetadata */
return S_OK;
}
static void user_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
IStream *stream = ppng_get_io_ptr(png_ptr);
HRESULT hr;
ULONG bytesread;
hr = IStream_Read(stream, data, length, &bytesread);
if (FAILED(hr) || bytesread != length)
{
ppng_error(png_ptr, "failed reading data");
}
}
static HRESULT WINAPI PngDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
PngDecoder *This = impl_from_IWICBitmapDecoder(iface);
LARGE_INTEGER seek;
HRESULT hr=S_OK;
png_bytep *row_pointers=NULL;
UINT image_size;
UINT i;
int color_type, bit_depth;
png_bytep trans;
int num_trans;
png_uint_32 transparency;
png_color_16p trans_values;
jmp_buf jmpbuf;
BYTE chunk_type[4];
ULONG chunk_size;
ULARGE_INTEGER chunk_start;
ULONG metadata_blocks_size = 0;
TRACE("(%p,%p,%x)\n", iface, pIStream, cacheOptions);
EnterCriticalSection(&This->lock);
/* initialize libpng */
This->png_ptr = ppng_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!This->png_ptr)
{
hr = E_FAIL;
goto end;
}
This->info_ptr = ppng_create_info_struct(This->png_ptr);
if (!This->info_ptr)
{
ppng_destroy_read_struct(&This->png_ptr, NULL, NULL);
This->png_ptr = NULL;
hr = E_FAIL;
goto end;
}
This->end_info = ppng_create_info_struct(This->png_ptr);
if (!This->end_info)
{
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, NULL);
This->png_ptr = NULL;
hr = E_FAIL;
goto end;
}
/* set up setjmp/longjmp error handling */
if (setjmp(jmpbuf))
{
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, &This->end_info);
HeapFree(GetProcessHeap(), 0, row_pointers);
This->png_ptr = NULL;
hr = E_FAIL;
goto end;
}
ppng_set_error_fn(This->png_ptr, jmpbuf, user_error_fn, user_warning_fn);
ppng_set_crc_action(This->png_ptr, PNG_CRC_QUIET_USE, PNG_CRC_QUIET_USE);
/* seek to the start of the stream */
seek.QuadPart = 0;
hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto end;
/* set up custom i/o handling */
ppng_set_read_fn(This->png_ptr, pIStream, user_read_data);
/* read the header */
ppng_read_info(This->png_ptr, This->info_ptr);
/* choose a pixel format */
color_type = ppng_get_color_type(This->png_ptr, This->info_ptr);
bit_depth = ppng_get_bit_depth(This->png_ptr, This->info_ptr);
/* check for color-keyed alpha */
transparency = ppng_get_tRNS(This->png_ptr, This->info_ptr, &trans, &num_trans, &trans_values);
if (transparency && (color_type == PNG_COLOR_TYPE_RGB ||
(color_type == PNG_COLOR_TYPE_GRAY && bit_depth == 16)))
{
/* expand to RGBA */
if (color_type == PNG_COLOR_TYPE_GRAY)
ppng_set_gray_to_rgb(This->png_ptr);
ppng_set_tRNS_to_alpha(This->png_ptr);
color_type = PNG_COLOR_TYPE_RGB_ALPHA;
}
switch (color_type)
{
case PNG_COLOR_TYPE_GRAY_ALPHA:
/* WIC does not support grayscale alpha formats so use RGBA */
ppng_set_gray_to_rgb(This->png_ptr);
/* fall through */
case PNG_COLOR_TYPE_RGB_ALPHA:
This->bpp = bit_depth * 4;
switch (bit_depth)
{
case 8:
ppng_set_bgr(This->png_ptr);
This->format = &GUID_WICPixelFormat32bppBGRA;
break;
case 16: This->format = &GUID_WICPixelFormat64bppRGBA; break;
default:
ERR("invalid RGBA bit depth: %i\n", bit_depth);
hr = E_FAIL;
goto end;
}
break;
case PNG_COLOR_TYPE_GRAY:
This->bpp = bit_depth;
if (!transparency)
{
switch (bit_depth)
{
case 1: This->format = &GUID_WICPixelFormatBlackWhite; break;
case 2: This->format = &GUID_WICPixelFormat2bppGray; break;
case 4: This->format = &GUID_WICPixelFormat4bppGray; break;
case 8: This->format = &GUID_WICPixelFormat8bppGray; break;
case 16: This->format = &GUID_WICPixelFormat16bppGray; break;
default:
ERR("invalid grayscale bit depth: %i\n", bit_depth);
hr = E_FAIL;
goto end;
}
break;
}
/* else fall through */
case PNG_COLOR_TYPE_PALETTE:
This->bpp = bit_depth;
switch (bit_depth)
{
case 1: This->format = &GUID_WICPixelFormat1bppIndexed; break;
case 2: This->format = &GUID_WICPixelFormat2bppIndexed; break;
case 4: This->format = &GUID_WICPixelFormat4bppIndexed; break;
case 8: This->format = &GUID_WICPixelFormat8bppIndexed; break;
default:
ERR("invalid indexed color bit depth: %i\n", bit_depth);
hr = E_FAIL;
goto end;
}
break;
case PNG_COLOR_TYPE_RGB:
This->bpp = bit_depth * 3;
switch (bit_depth)
{
case 8:
ppng_set_bgr(This->png_ptr);
This->format = &GUID_WICPixelFormat24bppBGR;
break;
case 16: This->format = &GUID_WICPixelFormat48bppRGB; break;
default:
ERR("invalid RGB color bit depth: %i\n", bit_depth);
hr = E_FAIL;
goto end;
}
break;
default:
ERR("invalid color type %i\n", color_type);
hr = E_FAIL;
goto end;
}
/* read the image data */
This->width = ppng_get_image_width(This->png_ptr, This->info_ptr);
This->height = ppng_get_image_height(This->png_ptr, This->info_ptr);
This->stride = (This->width * This->bpp + 7) / 8;
image_size = This->stride * This->height;
This->image_bits = HeapAlloc(GetProcessHeap(), 0, image_size);
if (!This->image_bits)
{
hr = E_OUTOFMEMORY;
goto end;
}
row_pointers = HeapAlloc(GetProcessHeap(), 0, sizeof(png_bytep)*This->height);
if (!row_pointers)
{
hr = E_OUTOFMEMORY;
goto end;
}
for (i=0; i<This->height; i++)
row_pointers[i] = This->image_bits + i * This->stride;
ppng_read_image(This->png_ptr, row_pointers);
HeapFree(GetProcessHeap(), 0, row_pointers);
row_pointers = NULL;
ppng_read_end(This->png_ptr, This->end_info);
/* Find the metadata chunks in the file. */
seek.QuadPart = 8;
do
{
hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, &chunk_start);
if (FAILED(hr)) goto end;
hr = read_png_chunk(pIStream, chunk_type, NULL, &chunk_size);
if (FAILED(hr)) goto end;
if (chunk_type[0] >= 'a' && chunk_type[0] <= 'z' &&
memcmp(chunk_type, "tRNS", 4) && memcmp(chunk_type, "pHYs", 4))
{
/* This chunk is considered metadata. */
if (This->metadata_count == metadata_blocks_size)
{
metadata_block_info* new_metadata_blocks;
ULONG new_metadata_blocks_size;
new_metadata_blocks_size = 4 + metadata_blocks_size * 2;
new_metadata_blocks = HeapAlloc(GetProcessHeap(), 0,
new_metadata_blocks_size * sizeof(*new_metadata_blocks));
if (!new_metadata_blocks)
{
hr = E_OUTOFMEMORY;
goto end;
}
memcpy(new_metadata_blocks, This->metadata_blocks,
This->metadata_count * sizeof(*new_metadata_blocks));
HeapFree(GetProcessHeap(), 0, This->metadata_blocks);
This->metadata_blocks = new_metadata_blocks;
metadata_blocks_size = new_metadata_blocks_size;
}
This->metadata_blocks[This->metadata_count].ofs = chunk_start;
This->metadata_blocks[This->metadata_count].len.QuadPart = chunk_size + 12;
This->metadata_blocks[This->metadata_count].reader = NULL;
This->metadata_count++;
}
seek.QuadPart = chunk_start.QuadPart + chunk_size + 12; /* skip data and CRC */
} while (memcmp(chunk_type, "IEND", 4));
This->stream = pIStream;
IStream_AddRef(This->stream);
This->initialized = TRUE;
end:
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI PngDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
GUID *pguidContainerFormat)
{
memcpy(pguidContainerFormat, &GUID_ContainerFormatPng, sizeof(GUID));
return S_OK;
}
static HRESULT WINAPI PngDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
IWICBitmapDecoderInfo **ppIDecoderInfo)
{
HRESULT hr;
IWICComponentInfo *compinfo;
TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
hr = CreateComponentInfo(&CLSID_WICPngDecoder, &compinfo);
if (FAILED(hr)) return hr;
hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
(void**)ppIDecoderInfo);
IWICComponentInfo_Release(compinfo);
return hr;
}
static HRESULT WINAPI PngDecoder_CopyPalette(IWICBitmapDecoder *iface,
IWICPalette *palette)
{
TRACE("(%p,%p)\n", iface, palette);
return WINCODEC_ERR_PALETTEUNAVAILABLE;
}
static HRESULT WINAPI PngDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
return E_NOTIMPL;
}
static HRESULT WINAPI PngDecoder_GetPreview(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIBitmapSource)
{
TRACE("(%p,%p)\n", iface, ppIBitmapSource);
if (!ppIBitmapSource) return E_INVALIDARG;
*ppIBitmapSource = NULL;
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI PngDecoder_GetColorContexts(IWICBitmapDecoder *iface,
UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
{
TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI PngDecoder_GetThumbnail(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIThumbnail)
{
TRACE("(%p,%p)\n", iface, ppIThumbnail);
if (!ppIThumbnail) return E_INVALIDARG;
*ppIThumbnail = NULL;
return WINCODEC_ERR_CODECNOTHUMBNAIL;
}
static HRESULT WINAPI PngDecoder_GetFrameCount(IWICBitmapDecoder *iface,
UINT *pCount)
{
if (!pCount) return E_INVALIDARG;
*pCount = 1;
return S_OK;
}
static HRESULT WINAPI PngDecoder_GetFrame(IWICBitmapDecoder *iface,
UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
{
PngDecoder *This = impl_from_IWICBitmapDecoder(iface);
TRACE("(%p,%u,%p)\n", iface, index, ppIBitmapFrame);
if (!This->initialized) return WINCODEC_ERR_FRAMEMISSING;
if (index != 0) return E_INVALIDARG;
IWICBitmapDecoder_AddRef(iface);
*ppIBitmapFrame = &This->IWICBitmapFrameDecode_iface;
return S_OK;
}
static const IWICBitmapDecoderVtbl PngDecoder_Vtbl = {
PngDecoder_QueryInterface,
PngDecoder_AddRef,
PngDecoder_Release,
PngDecoder_QueryCapability,
PngDecoder_Initialize,
PngDecoder_GetContainerFormat,
PngDecoder_GetDecoderInfo,
PngDecoder_CopyPalette,
PngDecoder_GetMetadataQueryReader,
PngDecoder_GetPreview,
PngDecoder_GetColorContexts,
PngDecoder_GetThumbnail,
PngDecoder_GetFrameCount,
PngDecoder_GetFrame
};
static HRESULT WINAPI PngDecoder_Frame_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
void **ppv)
{
PngDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) ||
IsEqualIID(&IID_IWICBitmapSource, iid) ||
IsEqualIID(&IID_IWICBitmapFrameDecode, iid))
{
*ppv = &This->IWICBitmapFrameDecode_iface;
}
else if (IsEqualIID(&IID_IWICMetadataBlockReader, iid))
{
*ppv = &This->IWICMetadataBlockReader_iface;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI PngDecoder_Frame_AddRef(IWICBitmapFrameDecode *iface)
{
PngDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
return IWICBitmapDecoder_AddRef(&This->IWICBitmapDecoder_iface);
}
static ULONG WINAPI PngDecoder_Frame_Release(IWICBitmapFrameDecode *iface)
{
PngDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
return IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
}
static HRESULT WINAPI PngDecoder_Frame_GetSize(IWICBitmapFrameDecode *iface,
UINT *puiWidth, UINT *puiHeight)
{
PngDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
*puiWidth = This->width;
*puiHeight = This->height;
TRACE("(%p)->(%u,%u)\n", iface, *puiWidth, *puiHeight);
return S_OK;
}
static HRESULT WINAPI PngDecoder_Frame_GetPixelFormat(IWICBitmapFrameDecode *iface,
WICPixelFormatGUID *pPixelFormat)
{
PngDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
TRACE("(%p,%p)\n", iface, pPixelFormat);
memcpy(pPixelFormat, This->format, sizeof(GUID));
return S_OK;
}
static HRESULT WINAPI PngDecoder_Frame_GetResolution(IWICBitmapFrameDecode *iface,
double *pDpiX, double *pDpiY)
{
PngDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
png_uint_32 ret, xres, yres;
int unit_type;
EnterCriticalSection(&This->lock);
ret = ppng_get_pHYs(This->png_ptr, This->info_ptr, &xres, &yres, &unit_type);
if (ret && unit_type == PNG_RESOLUTION_METER)
{
*pDpiX = xres * 0.0254;
*pDpiY = yres * 0.0254;
}
else
{
WARN("no pHYs block present\n");
*pDpiX = *pDpiY = 96.0;
}
LeaveCriticalSection(&This->lock);
TRACE("(%p)->(%0.2f,%0.2f)\n", iface, *pDpiX, *pDpiY);
return S_OK;
}
static HRESULT WINAPI PngDecoder_Frame_CopyPalette(IWICBitmapFrameDecode *iface,
IWICPalette *pIPalette)
{
PngDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
png_uint_32 ret, color_type, bit_depth;
png_colorp png_palette;
int num_palette;
WICColor palette[256];
png_bytep trans_alpha;
int num_trans;
png_color_16p trans_values;
int i;
HRESULT hr=S_OK;
TRACE("(%p,%p)\n", iface, pIPalette);
EnterCriticalSection(&This->lock);
color_type = ppng_get_color_type(This->png_ptr, This->info_ptr);
bit_depth = ppng_get_bit_depth(This->png_ptr, This->info_ptr);
if (color_type == PNG_COLOR_TYPE_PALETTE)
{
ret = ppng_get_PLTE(This->png_ptr, This->info_ptr, &png_palette, &num_palette);
if (!ret)
{
hr = WINCODEC_ERR_PALETTEUNAVAILABLE;
goto end;
}
if (num_palette > 256)
{
ERR("palette has %i colors?!\n", num_palette);
hr = E_FAIL;
goto end;
}
ret = ppng_get_tRNS(This->png_ptr, This->info_ptr, &trans_alpha, &num_trans, &trans_values);
if (!ret) num_trans = 0;
for (i=0; i<num_palette; i++)
{
BYTE alpha = (i < num_trans) ? trans_alpha[i] : 0xff;
palette[i] = (alpha << 24 |
png_palette[i].red << 16|
png_palette[i].green << 8|
png_palette[i].blue);
}
}
else if (color_type == PNG_COLOR_TYPE_GRAY) {
ret = ppng_get_tRNS(This->png_ptr, This->info_ptr, &trans_alpha, &num_trans, &trans_values);
if (!ret)
{
hr = WINCODEC_ERR_PALETTEUNAVAILABLE;
goto end;
}
num_palette = 1 << bit_depth;
for (i=0; i<num_palette; i++)
{
BYTE alpha = (i == trans_values[0].gray) ? 0 : 0xff;
BYTE val = i * 255 / (num_palette - 1);
palette[i] = (alpha << 24 | val << 16 | val << 8 | val);
}
}
else
{
hr = WINCODEC_ERR_PALETTEUNAVAILABLE;
}
end:
LeaveCriticalSection(&This->lock);
if (SUCCEEDED(hr))
hr = IWICPalette_InitializeCustom(pIPalette, palette, num_palette);
return hr;
}
static HRESULT WINAPI PngDecoder_Frame_CopyPixels(IWICBitmapFrameDecode *iface,
const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
{
PngDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
return copy_pixels(This->bpp, This->image_bits,
This->width, This->height, This->stride,
prc, cbStride, cbBufferSize, pbBuffer);
}
static HRESULT WINAPI PngDecoder_Frame_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
PngDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
if (!ppIMetadataQueryReader)
return E_INVALIDARG;
return MetadataQueryReader_CreateInstance(&This->IWICMetadataBlockReader_iface, NULL, ppIMetadataQueryReader);
}
static HRESULT WINAPI PngDecoder_Frame_GetColorContexts(IWICBitmapFrameDecode *iface,
UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
{
PngDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
png_charp name;
BYTE *profile;
png_uint_32 len;
int compression_type;
HRESULT hr;
TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
if (!pcActualCount) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
if (ppng_get_iCCP(This->png_ptr, This->info_ptr, &name, &compression_type, (void *)&profile, &len))
{
if (cCount && ppIColorContexts)
{
hr = IWICColorContext_InitializeFromMemory(*ppIColorContexts, profile, len);
if (FAILED(hr))
{
LeaveCriticalSection(&This->lock);
return hr;
}
}
*pcActualCount = 1;
}
else
*pcActualCount = 0;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PngDecoder_Frame_GetThumbnail(IWICBitmapFrameDecode *iface,
IWICBitmapSource **ppIThumbnail)
{
TRACE("(%p,%p)\n", iface, ppIThumbnail);
if (!ppIThumbnail) return E_INVALIDARG;
*ppIThumbnail = NULL;
return WINCODEC_ERR_CODECNOTHUMBNAIL;
}
static const IWICBitmapFrameDecodeVtbl PngDecoder_FrameVtbl = {
PngDecoder_Frame_QueryInterface,
PngDecoder_Frame_AddRef,
PngDecoder_Frame_Release,
PngDecoder_Frame_GetSize,
PngDecoder_Frame_GetPixelFormat,
PngDecoder_Frame_GetResolution,
PngDecoder_Frame_CopyPalette,
PngDecoder_Frame_CopyPixels,
PngDecoder_Frame_GetMetadataQueryReader,
PngDecoder_Frame_GetColorContexts,
PngDecoder_Frame_GetThumbnail
};
static HRESULT WINAPI PngDecoder_Block_QueryInterface(IWICMetadataBlockReader *iface, REFIID iid,
void **ppv)
{
PngDecoder *This = impl_from_IWICMetadataBlockReader(iface);
return IWICBitmapFrameDecode_QueryInterface(&This->IWICBitmapFrameDecode_iface, iid, ppv);
}
static ULONG WINAPI PngDecoder_Block_AddRef(IWICMetadataBlockReader *iface)
{
PngDecoder *This = impl_from_IWICMetadataBlockReader(iface);
return IWICBitmapDecoder_AddRef(&This->IWICBitmapDecoder_iface);
}
static ULONG WINAPI PngDecoder_Block_Release(IWICMetadataBlockReader *iface)
{
PngDecoder *This = impl_from_IWICMetadataBlockReader(iface);
return IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
}
static HRESULT WINAPI PngDecoder_Block_GetContainerFormat(IWICMetadataBlockReader *iface,
GUID *pguidContainerFormat)
{
if (!pguidContainerFormat) return E_INVALIDARG;
memcpy(pguidContainerFormat, &GUID_ContainerFormatPng, sizeof(GUID));
return S_OK;
}
static HRESULT WINAPI PngDecoder_Block_GetCount(IWICMetadataBlockReader *iface,
UINT *pcCount)
{
PngDecoder *This = impl_from_IWICMetadataBlockReader(iface);
TRACE("%p,%p\n", iface, pcCount);
if (!pcCount) return E_INVALIDARG;
*pcCount = This->metadata_count;
return S_OK;
}
static HRESULT WINAPI PngDecoder_Block_GetReaderByIndex(IWICMetadataBlockReader *iface,
UINT nIndex, IWICMetadataReader **ppIMetadataReader)
{
PngDecoder *This = impl_from_IWICMetadataBlockReader(iface);
HRESULT hr;
IWICComponentFactory* factory;
IWICStream* stream;
TRACE("%p,%d,%p\n", iface, nIndex, ppIMetadataReader);
if (nIndex >= This->metadata_count || !ppIMetadataReader)
return E_INVALIDARG;
if (!This->metadata_blocks[nIndex].reader)
{
hr = StreamImpl_Create(&stream);
if (SUCCEEDED(hr))
{
hr = IWICStream_InitializeFromIStreamRegion(stream, This->stream,
This->metadata_blocks[nIndex].ofs, This->metadata_blocks[nIndex].len);
if (SUCCEEDED(hr))
hr = ComponentFactory_CreateInstance(&IID_IWICComponentFactory, (void**)&factory);
if (SUCCEEDED(hr))
{
hr = IWICComponentFactory_CreateMetadataReaderFromContainer(factory,
&GUID_ContainerFormatPng, NULL, WICMetadataCreationAllowUnknown,
(IStream*)stream, &This->metadata_blocks[nIndex].reader);
IWICComponentFactory_Release(factory);
}
IWICStream_Release(stream);
}
if (FAILED(hr))
{
*ppIMetadataReader = NULL;
return hr;
}
}
*ppIMetadataReader = This->metadata_blocks[nIndex].reader;
IWICMetadataReader_AddRef(*ppIMetadataReader);
return S_OK;
}
static HRESULT WINAPI PngDecoder_Block_GetEnumerator(IWICMetadataBlockReader *iface,
IEnumUnknown **ppIEnumMetadata)
{
FIXME("%p,%p\n", iface, ppIEnumMetadata);
return E_NOTIMPL;
}
static const IWICMetadataBlockReaderVtbl PngDecoder_BlockVtbl = {
PngDecoder_Block_QueryInterface,
PngDecoder_Block_AddRef,
PngDecoder_Block_Release,
PngDecoder_Block_GetContainerFormat,
PngDecoder_Block_GetCount,
PngDecoder_Block_GetReaderByIndex,
PngDecoder_Block_GetEnumerator,
};
HRESULT PngDecoder_CreateInstance(REFIID iid, void** ppv)
{
PngDecoder *This;
HRESULT ret;
TRACE("(%s,%p)\n", debugstr_guid(iid), ppv);
*ppv = NULL;
if (!load_libpng())
{
ERR("Failed reading PNG because unable to find %s\n",SONAME_LIBPNG);
return E_FAIL;
}
This = HeapAlloc(GetProcessHeap(), 0, sizeof(PngDecoder));
if (!This) return E_OUTOFMEMORY;
This->IWICBitmapDecoder_iface.lpVtbl = &PngDecoder_Vtbl;
This->IWICBitmapFrameDecode_iface.lpVtbl = &PngDecoder_FrameVtbl;
This->IWICMetadataBlockReader_iface.lpVtbl = &PngDecoder_BlockVtbl;
This->ref = 1;
This->png_ptr = NULL;
This->info_ptr = NULL;
This->end_info = NULL;
This->stream = NULL;
This->initialized = FALSE;
This->image_bits = NULL;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PngDecoder.lock");
This->metadata_count = 0;
This->metadata_blocks = NULL;
ret = IWICBitmapDecoder_QueryInterface(&This->IWICBitmapDecoder_iface, iid, ppv);
IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
return ret;
}
struct png_pixelformat {
const WICPixelFormatGUID *guid;
UINT bpp;
int bit_depth;
int color_type;
BOOL remove_filler;
BOOL swap_rgb;
};
static const struct png_pixelformat formats[] = {
{&GUID_WICPixelFormat32bppBGRA, 32, 8, PNG_COLOR_TYPE_RGB_ALPHA, 0, 1},
{&GUID_WICPixelFormat24bppBGR, 24, 8, PNG_COLOR_TYPE_RGB, 0, 1},
{&GUID_WICPixelFormatBlackWhite, 1, 1, PNG_COLOR_TYPE_GRAY, 0, 0},
{&GUID_WICPixelFormat2bppGray, 2, 2, PNG_COLOR_TYPE_GRAY, 0, 0},
{&GUID_WICPixelFormat4bppGray, 4, 4, PNG_COLOR_TYPE_GRAY, 0, 0},
{&GUID_WICPixelFormat8bppGray, 8, 8, PNG_COLOR_TYPE_GRAY, 0, 0},
{&GUID_WICPixelFormat16bppGray, 16, 16, PNG_COLOR_TYPE_GRAY, 0, 0},
{&GUID_WICPixelFormat32bppBGR, 32, 8, PNG_COLOR_TYPE_RGB, 1, 1},
{&GUID_WICPixelFormat48bppRGB, 48, 16, PNG_COLOR_TYPE_RGB, 0, 0},
{&GUID_WICPixelFormat64bppRGBA, 64, 16, PNG_COLOR_TYPE_RGB_ALPHA, 0, 0},
{&GUID_WICPixelFormat1bppIndexed, 1, 1, PNG_COLOR_TYPE_PALETTE, 0, 0},
{&GUID_WICPixelFormat2bppIndexed, 2, 2, PNG_COLOR_TYPE_PALETTE, 0, 0},
{&GUID_WICPixelFormat4bppIndexed, 4, 4, PNG_COLOR_TYPE_PALETTE, 0, 0},
{&GUID_WICPixelFormat8bppIndexed, 8, 8, PNG_COLOR_TYPE_PALETTE, 0, 0},
{NULL},
};
typedef struct PngEncoder {
IWICBitmapEncoder IWICBitmapEncoder_iface;
IWICBitmapFrameEncode IWICBitmapFrameEncode_iface;
LONG ref;
IStream *stream;
png_structp png_ptr;
png_infop info_ptr;
UINT frame_count;
BOOL frame_initialized;
const struct png_pixelformat *format;
BOOL info_written;
UINT width, height;
double xres, yres;
UINT lines_written;
BOOL frame_committed;
BOOL committed;
CRITICAL_SECTION lock;
BOOL interlace;
WICPngFilterOption filter;
BYTE *data;
UINT stride;
UINT passes;
WICColor palette[256];
UINT colors;
} PngEncoder;
static inline PngEncoder *impl_from_IWICBitmapEncoder(IWICBitmapEncoder *iface)
{
return CONTAINING_RECORD(iface, PngEncoder, IWICBitmapEncoder_iface);
}
static inline PngEncoder *impl_from_IWICBitmapFrameEncode(IWICBitmapFrameEncode *iface)
{
return CONTAINING_RECORD(iface, PngEncoder, IWICBitmapFrameEncode_iface);
}
static HRESULT WINAPI PngFrameEncode_QueryInterface(IWICBitmapFrameEncode *iface, REFIID iid,
void **ppv)
{
PngEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) ||
IsEqualIID(&IID_IWICBitmapFrameEncode, iid))
{
*ppv = &This->IWICBitmapFrameEncode_iface;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI PngFrameEncode_AddRef(IWICBitmapFrameEncode *iface)
{
PngEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
return IWICBitmapEncoder_AddRef(&This->IWICBitmapEncoder_iface);
}
static ULONG WINAPI PngFrameEncode_Release(IWICBitmapFrameEncode *iface)
{
PngEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
return IWICBitmapEncoder_Release(&This->IWICBitmapEncoder_iface);
}
static HRESULT WINAPI PngFrameEncode_Initialize(IWICBitmapFrameEncode *iface,
IPropertyBag2 *pIEncoderOptions)
{
PngEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
WICPngFilterOption filter;
BOOL interlace;
PROPBAG2 opts[2]= {{0}};
VARIANT opt_values[2];
HRESULT opt_hres[2];
HRESULT hr;
TRACE("(%p,%p)\n", iface, pIEncoderOptions);
opts[0].pstrName = (LPOLESTR)wszPngInterlaceOption;
opts[0].vt = VT_BOOL;
opts[1].pstrName = (LPOLESTR)wszPngFilterOption;
opts[1].vt = VT_UI1;
if (pIEncoderOptions)
{
hr = IPropertyBag2_Read(pIEncoderOptions, sizeof(opts)/sizeof(opts[0]), opts, NULL, opt_values, opt_hres);
if (FAILED(hr))
return hr;
if (V_VT(&opt_values[0]) == VT_EMPTY)
interlace = FALSE;
else
interlace = (V_BOOL(&opt_values[0]) != 0);
filter = V_UI1(&opt_values[1]);
if (filter > WICPngFilterAdaptive)
{
WARN("Unrecognized filter option value %u.\n", filter);
filter = WICPngFilterUnspecified;
}
}
else
{
interlace = FALSE;
filter = WICPngFilterUnspecified;
}
EnterCriticalSection(&This->lock);
if (This->frame_initialized)
{
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_WRONGSTATE;
}
This->interlace = interlace;
This->filter = filter;
This->frame_initialized = TRUE;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PngFrameEncode_SetSize(IWICBitmapFrameEncode *iface,
UINT uiWidth, UINT uiHeight)
{
PngEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
TRACE("(%p,%u,%u)\n", iface, uiWidth, uiHeight);
EnterCriticalSection(&This->lock);
if (!This->frame_initialized || This->info_written)
{
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_WRONGSTATE;
}
This->width = uiWidth;
This->height = uiHeight;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PngFrameEncode_SetResolution(IWICBitmapFrameEncode *iface,
double dpiX, double dpiY)
{
PngEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
TRACE("(%p,%0.2f,%0.2f)\n", iface, dpiX, dpiY);
EnterCriticalSection(&This->lock);
if (!This->frame_initialized || This->info_written)
{
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_WRONGSTATE;
}
This->xres = dpiX;
This->yres = dpiY;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PngFrameEncode_SetPixelFormat(IWICBitmapFrameEncode *iface,
WICPixelFormatGUID *pPixelFormat)
{
PngEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
int i;
TRACE("(%p,%s)\n", iface, debugstr_guid(pPixelFormat));
EnterCriticalSection(&This->lock);
if (!This->frame_initialized || This->info_written)
{
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_WRONGSTATE;
}
for (i=0; formats[i].guid; i++)
{
if (memcmp(formats[i].guid, pPixelFormat, sizeof(GUID)) == 0)
break;
}
if (!formats[i].guid) i = 0;
This->format = &formats[i];
memcpy(pPixelFormat, This->format->guid, sizeof(GUID));
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PngFrameEncode_SetColorContexts(IWICBitmapFrameEncode *iface,
UINT cCount, IWICColorContext **ppIColorContext)
{
FIXME("(%p,%u,%p): stub\n", iface, cCount, ppIColorContext);
return E_NOTIMPL;
}
static HRESULT WINAPI PngFrameEncode_SetPalette(IWICBitmapFrameEncode *iface,
IWICPalette *palette)
{
PngEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
HRESULT hr;
TRACE("(%p,%p)\n", iface, palette);
if (!palette) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
if (This->frame_initialized)
hr = IWICPalette_GetColors(palette, 256, This->palette, &This->colors);
else
hr = WINCODEC_ERR_NOTINITIALIZED;
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI PngFrameEncode_SetThumbnail(IWICBitmapFrameEncode *iface,
IWICBitmapSource *pIThumbnail)
{
FIXME("(%p,%p): stub\n", iface, pIThumbnail);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI PngFrameEncode_WritePixels(IWICBitmapFrameEncode *iface,
UINT lineCount, UINT cbStride, UINT cbBufferSize, BYTE *pbPixels)
{
PngEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
png_byte **row_pointers=NULL;
UINT i;
jmp_buf jmpbuf;
TRACE("(%p,%u,%u,%u,%p)\n", iface, lineCount, cbStride, cbBufferSize, pbPixels);
EnterCriticalSection(&This->lock);
if (!This->frame_initialized || !This->width || !This->height || !This->format)
{
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_WRONGSTATE;
}
if (lineCount == 0 || lineCount + This->lines_written > This->height)
{
LeaveCriticalSection(&This->lock);
return E_INVALIDARG;
}
/* set up setjmp/longjmp error handling */
if (setjmp(jmpbuf))
{
LeaveCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, row_pointers);
return E_FAIL;
}
ppng_set_error_fn(This->png_ptr, jmpbuf, user_error_fn, user_warning_fn);
if (!This->info_written)
{
if (This->interlace)
{
/* libpng requires us to write all data multiple times in this case. */
This->stride = (This->format->bpp * This->width + 7)/8;
This->data = HeapAlloc(GetProcessHeap(), 0, This->height * This->stride);
if (!This->data)
{
LeaveCriticalSection(&This->lock);
return E_OUTOFMEMORY;
}
}
ppng_set_IHDR(This->png_ptr, This->info_ptr, This->width, This->height,
This->format->bit_depth, This->format->color_type,
This->interlace ? PNG_INTERLACE_ADAM7 : PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
if (This->xres != 0.0 && This->yres != 0.0)
{
ppng_set_pHYs(This->png_ptr, This->info_ptr, (This->xres+0.0127) / 0.0254,
(This->yres+0.0127) / 0.0254, PNG_RESOLUTION_METER);
}
if (This->format->color_type == PNG_COLOR_TYPE_PALETTE && This->colors)
{
png_color png_palette[256];
png_byte trans[256];
UINT i, num_trans = 0, colors;
/* Newer libpng versions don't accept larger palettes than the declared
* bit depth, so we need to generate the palette of the correct length.
*/
colors = min(This->colors, 1 << This->format->bit_depth);
for (i = 0; i < colors; i++)
{
png_palette[i].red = (This->palette[i] >> 16) & 0xff;
png_palette[i].green = (This->palette[i] >> 8) & 0xff;
png_palette[i].blue = This->palette[i] & 0xff;
trans[i] = (This->palette[i] >> 24) & 0xff;
if (trans[i] != 0xff)
num_trans = i+1;
}
ppng_set_PLTE(This->png_ptr, This->info_ptr, png_palette, colors);
if (num_trans)
ppng_set_tRNS(This->png_ptr, This->info_ptr, trans, num_trans, NULL);
}
ppng_write_info(This->png_ptr, This->info_ptr);
if (This->format->remove_filler)
ppng_set_filler(This->png_ptr, 0, PNG_FILLER_AFTER);
if (This->format->swap_rgb)
ppng_set_bgr(This->png_ptr);
if (This->interlace)
This->passes = ppng_set_interlace_handling(This->png_ptr);
if (This->filter != WICPngFilterUnspecified)
{
static const int png_filter_map[] =
{
/* WICPngFilterUnspecified */ PNG_NO_FILTERS,
/* WICPngFilterNone */ PNG_FILTER_NONE,
/* WICPngFilterSub */ PNG_FILTER_SUB,
/* WICPngFilterUp */ PNG_FILTER_UP,
/* WICPngFilterAverage */ PNG_FILTER_AVG,
/* WICPngFilterPaeth */ PNG_FILTER_PAETH,
/* WICPngFilterAdaptive */ PNG_ALL_FILTERS,
};
ppng_set_filter(This->png_ptr, 0, png_filter_map[This->filter]);
}
This->info_written = TRUE;
}
if (This->interlace)
{
/* Just store the data so we can write it in multiple passes in Commit. */
for (i=0; i<lineCount; i++)
memcpy(This->data + This->stride * (This->lines_written + i),
pbPixels + cbStride * i,
This->stride);
This->lines_written += lineCount;
LeaveCriticalSection(&This->lock);
return S_OK;
}
row_pointers = HeapAlloc(GetProcessHeap(), 0, lineCount * sizeof(png_byte*));
if (!row_pointers)
{
LeaveCriticalSection(&This->lock);
return E_OUTOFMEMORY;
}
for (i=0; i<lineCount; i++)
row_pointers[i] = pbPixels + cbStride * i;
ppng_write_rows(This->png_ptr, row_pointers, lineCount);
This->lines_written += lineCount;
LeaveCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, row_pointers);
return S_OK;
}
static HRESULT WINAPI PngFrameEncode_WriteSource(IWICBitmapFrameEncode *iface,
IWICBitmapSource *pIBitmapSource, WICRect *prc)
{
PngEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
HRESULT hr;
TRACE("(%p,%p,%p)\n", iface, pIBitmapSource, prc);
if (!This->frame_initialized)
return WINCODEC_ERR_WRONGSTATE;
hr = configure_write_source(iface, pIBitmapSource, prc,
This->format ? This->format->guid : NULL, This->width, This->height,
This->xres, This->yres);
if (SUCCEEDED(hr))
{
hr = write_source(iface, pIBitmapSource, prc,
This->format->guid, This->format->bpp, This->width, This->height);
}
return hr;
}
static HRESULT WINAPI PngFrameEncode_Commit(IWICBitmapFrameEncode *iface)
{
PngEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
png_byte **row_pointers=NULL;
jmp_buf jmpbuf;
TRACE("(%p)\n", iface);
EnterCriticalSection(&This->lock);
if (!This->info_written || This->lines_written != This->height || This->frame_committed)
{
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_WRONGSTATE;
}
/* set up setjmp/longjmp error handling */
if (setjmp(jmpbuf))
{
LeaveCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, row_pointers);
return E_FAIL;
}
ppng_set_error_fn(This->png_ptr, jmpbuf, user_error_fn, user_warning_fn);
if (This->interlace)
{
int i;
row_pointers = HeapAlloc(GetProcessHeap(), 0, This->height * sizeof(png_byte*));
if (!row_pointers)
{
LeaveCriticalSection(&This->lock);
return E_OUTOFMEMORY;
}
for (i=0; i<This->height; i++)
row_pointers[i] = This->data + This->stride * i;
for (i=0; i<This->passes; i++)
ppng_write_rows(This->png_ptr, row_pointers, This->height);
}
ppng_write_end(This->png_ptr, This->info_ptr);
This->frame_committed = TRUE;
HeapFree(GetProcessHeap(), 0, row_pointers);
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PngFrameEncode_GetMetadataQueryWriter(IWICBitmapFrameEncode *iface,
IWICMetadataQueryWriter **ppIMetadataQueryWriter)
{
FIXME("(%p, %p): stub\n", iface, ppIMetadataQueryWriter);
return E_NOTIMPL;
}
static const IWICBitmapFrameEncodeVtbl PngEncoder_FrameVtbl = {
PngFrameEncode_QueryInterface,
PngFrameEncode_AddRef,
PngFrameEncode_Release,
PngFrameEncode_Initialize,
PngFrameEncode_SetSize,
PngFrameEncode_SetResolution,
PngFrameEncode_SetPixelFormat,
PngFrameEncode_SetColorContexts,
PngFrameEncode_SetPalette,
PngFrameEncode_SetThumbnail,
PngFrameEncode_WritePixels,
PngFrameEncode_WriteSource,
PngFrameEncode_Commit,
PngFrameEncode_GetMetadataQueryWriter
};
static HRESULT WINAPI PngEncoder_QueryInterface(IWICBitmapEncoder *iface, REFIID iid,
void **ppv)
{
PngEncoder *This = impl_from_IWICBitmapEncoder(iface);
TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) ||
IsEqualIID(&IID_IWICBitmapEncoder, iid))
{
*ppv = &This->IWICBitmapEncoder_iface;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI PngEncoder_AddRef(IWICBitmapEncoder *iface)
{
PngEncoder *This = impl_from_IWICBitmapEncoder(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI PngEncoder_Release(IWICBitmapEncoder *iface)
{
PngEncoder *This = impl_from_IWICBitmapEncoder(iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
if (This->png_ptr)
ppng_destroy_write_struct(&This->png_ptr, &This->info_ptr);
if (This->stream)
IStream_Release(This->stream);
HeapFree(GetProcessHeap(), 0, This->data);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static void user_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
PngEncoder *This = ppng_get_io_ptr(png_ptr);
HRESULT hr;
ULONG byteswritten;
hr = IStream_Write(This->stream, data, length, &byteswritten);
if (FAILED(hr) || byteswritten != length)
{
ppng_error(png_ptr, "failed writing data");
}
}
static void user_flush(png_structp png_ptr)
{
}
static HRESULT WINAPI PngEncoder_Initialize(IWICBitmapEncoder *iface,
IStream *pIStream, WICBitmapEncoderCacheOption cacheOption)
{
PngEncoder *This = impl_from_IWICBitmapEncoder(iface);
jmp_buf jmpbuf;
TRACE("(%p,%p,%u)\n", iface, pIStream, cacheOption);
EnterCriticalSection(&This->lock);
if (This->png_ptr)
{
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_WRONGSTATE;
}
/* initialize libpng */
This->png_ptr = ppng_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!This->png_ptr)
{
LeaveCriticalSection(&This->lock);
return E_FAIL;
}
This->info_ptr = ppng_create_info_struct(This->png_ptr);
if (!This->info_ptr)
{
ppng_destroy_write_struct(&This->png_ptr, NULL);
This->png_ptr = NULL;
LeaveCriticalSection(&This->lock);
return E_FAIL;
}
IStream_AddRef(pIStream);
This->stream = pIStream;
/* set up setjmp/longjmp error handling */
if (setjmp(jmpbuf))
{
ppng_destroy_write_struct(&This->png_ptr, &This->info_ptr);
This->png_ptr = NULL;
IStream_Release(This->stream);
This->stream = NULL;
LeaveCriticalSection(&This->lock);
return E_FAIL;
}
ppng_set_error_fn(This->png_ptr, jmpbuf, user_error_fn, user_warning_fn);
/* set up custom i/o handling */
ppng_set_write_fn(This->png_ptr, This, user_write_data, user_flush);
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PngEncoder_GetContainerFormat(IWICBitmapEncoder *iface,
GUID *pguidContainerFormat)
{
FIXME("(%p,%s): stub\n", iface, debugstr_guid(pguidContainerFormat));
return E_NOTIMPL;
}
static HRESULT WINAPI PngEncoder_GetEncoderInfo(IWICBitmapEncoder *iface,
IWICBitmapEncoderInfo **ppIEncoderInfo)
{
FIXME("(%p,%p): stub\n", iface, ppIEncoderInfo);
return E_NOTIMPL;
}
static HRESULT WINAPI PngEncoder_SetColorContexts(IWICBitmapEncoder *iface,
UINT cCount, IWICColorContext **ppIColorContext)
{
FIXME("(%p,%u,%p): stub\n", iface, cCount, ppIColorContext);
return E_NOTIMPL;
}
static HRESULT WINAPI PngEncoder_SetPalette(IWICBitmapEncoder *iface, IWICPalette *palette)
{
PngEncoder *This = impl_from_IWICBitmapEncoder(iface);
HRESULT hr;
TRACE("(%p,%p)\n", iface, palette);
EnterCriticalSection(&This->lock);
hr = This->stream ? WINCODEC_ERR_UNSUPPORTEDOPERATION : WINCODEC_ERR_NOTINITIALIZED;
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI PngEncoder_SetThumbnail(IWICBitmapEncoder *iface, IWICBitmapSource *pIThumbnail)
{
TRACE("(%p,%p)\n", iface, pIThumbnail);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI PngEncoder_SetPreview(IWICBitmapEncoder *iface, IWICBitmapSource *pIPreview)
{
TRACE("(%p,%p)\n", iface, pIPreview);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI PngEncoder_CreateNewFrame(IWICBitmapEncoder *iface,
IWICBitmapFrameEncode **ppIFrameEncode, IPropertyBag2 **ppIEncoderOptions)
{
PngEncoder *This = impl_from_IWICBitmapEncoder(iface);
HRESULT hr;
PROPBAG2 opts[2]= {{0}};
TRACE("(%p,%p,%p)\n", iface, ppIFrameEncode, ppIEncoderOptions);
EnterCriticalSection(&This->lock);
if (This->frame_count != 0)
{
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
if (!This->stream)
{
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_NOTINITIALIZED;
}
opts[0].pstrName = (LPOLESTR)wszPngInterlaceOption;
opts[0].vt = VT_BOOL;
opts[0].dwType = PROPBAG2_TYPE_DATA;
opts[1].pstrName = (LPOLESTR)wszPngFilterOption;
opts[1].vt = VT_UI1;
opts[1].dwType = PROPBAG2_TYPE_DATA;
hr = CreatePropertyBag2(opts, sizeof(opts)/sizeof(opts[0]), ppIEncoderOptions);
if (FAILED(hr))
{
LeaveCriticalSection(&This->lock);
return hr;
}
This->frame_count = 1;
LeaveCriticalSection(&This->lock);
IWICBitmapEncoder_AddRef(iface);
*ppIFrameEncode = &This->IWICBitmapFrameEncode_iface;
return S_OK;
}
static HRESULT WINAPI PngEncoder_Commit(IWICBitmapEncoder *iface)
{
PngEncoder *This = impl_from_IWICBitmapEncoder(iface);
TRACE("(%p)\n", iface);
EnterCriticalSection(&This->lock);
if (!This->frame_committed || This->committed)
{
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_WRONGSTATE;
}
This->committed = TRUE;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PngEncoder_GetMetadataQueryWriter(IWICBitmapEncoder *iface,
IWICMetadataQueryWriter **ppIMetadataQueryWriter)
{
FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryWriter);
return E_NOTIMPL;
}
static const IWICBitmapEncoderVtbl PngEncoder_Vtbl = {
PngEncoder_QueryInterface,
PngEncoder_AddRef,
PngEncoder_Release,
PngEncoder_Initialize,
PngEncoder_GetContainerFormat,
PngEncoder_GetEncoderInfo,
PngEncoder_SetColorContexts,
PngEncoder_SetPalette,
PngEncoder_SetThumbnail,
PngEncoder_SetPreview,
PngEncoder_CreateNewFrame,
PngEncoder_Commit,
PngEncoder_GetMetadataQueryWriter
};
HRESULT PngEncoder_CreateInstance(REFIID iid, void** ppv)
{
PngEncoder *This;
HRESULT ret;
TRACE("(%s,%p)\n", debugstr_guid(iid), ppv);
*ppv = NULL;
if (!load_libpng())
{
ERR("Failed writing PNG because unable to find %s\n",SONAME_LIBPNG);
return E_FAIL;
}
This = HeapAlloc(GetProcessHeap(), 0, sizeof(PngEncoder));
if (!This) return E_OUTOFMEMORY;
This->IWICBitmapEncoder_iface.lpVtbl = &PngEncoder_Vtbl;
This->IWICBitmapFrameEncode_iface.lpVtbl = &PngEncoder_FrameVtbl;
This->ref = 1;
This->png_ptr = NULL;
This->info_ptr = NULL;
This->stream = NULL;
This->frame_count = 0;
This->frame_initialized = FALSE;
This->format = NULL;
This->info_written = FALSE;
This->width = 0;
This->height = 0;
This->xres = 0.0;
This->yres = 0.0;
This->lines_written = 0;
This->frame_committed = FALSE;
This->committed = FALSE;
This->data = NULL;
This->colors = 0;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PngEncoder.lock");
ret = IWICBitmapEncoder_QueryInterface(&This->IWICBitmapEncoder_iface, iid, ppv);
IWICBitmapEncoder_Release(&This->IWICBitmapEncoder_iface);
return ret;
}
#else /* !HAVE_PNG_H */
HRESULT PngDecoder_CreateInstance(REFIID iid, void** ppv)
{
ERR("Trying to load PNG picture, but PNG support is not compiled in.\n");
return E_FAIL;
}
HRESULT PngEncoder_CreateInstance(REFIID iid, void** ppv)
{
ERR("Trying to save PNG picture, but PNG support is not compiled in.\n");
return E_FAIL;
}
#endif