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goma / wine / 2c3bc2cf569b877f1452cc6d480f0fa076df8ae1 / . / dlls / windowscodecs / pngformat.c
blob: 791df5651780077e6f8777555cbd4e58a8bb14c9 [file] [log] [blame]
/*
* Copyright 2009 Vincent Povirk for CodeWeavers
*
* 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 COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "objbase.h"
#include "wincodec.h"
#include "wincodecs_private.h"
#include "wine/debug.h"
#include "wine/library.h"
WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
#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_image_height);
MAKE_FUNCPTR(png_get_image_width);
MAKE_FUNCPTR(png_get_io_ptr);
MAKE_FUNCPTR(png_get_pHYs);
MAKE_FUNCPTR(png_get_progressive_ptr);
MAKE_FUNCPTR(png_get_PLTE);
MAKE_FUNCPTR(png_get_tRNS);
MAKE_FUNCPTR(png_process_data);
MAKE_FUNCPTR(png_progressive_combine_row);
MAKE_FUNCPTR(png_set_bgr);
MAKE_FUNCPTR(png_set_error_fn);
#if HAVE_PNG_SET_EXPAND_GRAY_1_2_4_TO_8
MAKE_FUNCPTR(png_set_expand_gray_1_2_4_to_8);
#else
MAKE_FUNCPTR(png_set_gray_1_2_4_to_8);
#endif
MAKE_FUNCPTR(png_set_filler);
MAKE_FUNCPTR(png_set_gray_to_rgb);
MAKE_FUNCPTR(png_set_IHDR);
MAKE_FUNCPTR(png_set_pHYs);
MAKE_FUNCPTR(png_set_progressive_read_fn);
MAKE_FUNCPTR(png_set_read_fn);
MAKE_FUNCPTR(png_set_strip_16);
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_read_update_info);
MAKE_FUNCPTR(png_write_end);
MAKE_FUNCPTR(png_write_info);
MAKE_FUNCPTR(png_write_rows);
#undef MAKE_FUNCPTR
static void *load_libpng(void)
{
if((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; \
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_image_height);
LOAD_FUNCPTR(png_get_image_width);
LOAD_FUNCPTR(png_get_io_ptr);
LOAD_FUNCPTR(png_get_pHYs);
LOAD_FUNCPTR(png_get_progressive_ptr);
LOAD_FUNCPTR(png_get_PLTE);
LOAD_FUNCPTR(png_get_tRNS);
LOAD_FUNCPTR(png_process_data);
LOAD_FUNCPTR(png_progressive_combine_row);
LOAD_FUNCPTR(png_set_bgr);
LOAD_FUNCPTR(png_set_error_fn);
#if HAVE_PNG_SET_EXPAND_GRAY_1_2_4_TO_8
LOAD_FUNCPTR(png_set_expand_gray_1_2_4_to_8);
#else
LOAD_FUNCPTR(png_set_gray_1_2_4_to_8);
#endif
LOAD_FUNCPTR(png_set_filler);
LOAD_FUNCPTR(png_set_gray_to_rgb);
LOAD_FUNCPTR(png_set_IHDR);
LOAD_FUNCPTR(png_set_pHYs);
LOAD_FUNCPTR(png_set_progressive_read_fn);
LOAD_FUNCPTR(png_set_read_fn);
LOAD_FUNCPTR(png_set_strip_16);
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_read_update_info);
LOAD_FUNCPTR(png_write_end);
LOAD_FUNCPTR(png_write_info);
LOAD_FUNCPTR(png_write_rows);
#undef LOAD_FUNCPTR
}
return libpng_handle;
}
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 {
const IWICBitmapDecoderVtbl *lpVtbl;
const IWICBitmapFrameDecodeVtbl *lpFrameVtbl;
LONG ref;
png_structp png_ptr;
png_infop info_ptr;
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 */
} PngDecoder;
static inline PngDecoder *impl_from_frame(IWICBitmapFrameDecode *iface)
{
return CONTAINING_RECORD(iface, PngDecoder, lpFrameVtbl);
}
static const IWICBitmapFrameDecodeVtbl PngDecoder_FrameVtbl;
static HRESULT WINAPI PngDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
void **ppv)
{
PngDecoder *This = (PngDecoder*)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;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI PngDecoder_AddRef(IWICBitmapDecoder *iface)
{
PngDecoder *This = (PngDecoder*)iface;
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI PngDecoder_Release(IWICBitmapDecoder *iface)
{
PngDecoder *This = (PngDecoder*)iface;
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
if (This->png_ptr)
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, NULL);
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, This->image_bits);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI PngDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *pIStream,
DWORD *pdwCapability)
{
FIXME("(%p,%p,%p): stub\n", iface, pIStream, pdwCapability);
return E_NOTIMPL;
}
static void info_callback(png_structp png_ptr, png_infop info)
{
int color_type, bit_depth;
png_bytep trans;
int num_trans;
png_uint_32 transparency;
png_color_16p trans_values;
UINT image_size;
HRESULT hr = S_OK;
PngDecoder *This;
This = (PngDecoder*) ppng_get_progressive_ptr(png_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_PALETTE)
{
/* expand to RGBA */
if (color_type == PNG_COLOR_TYPE_GRAY)
{
if (bit_depth < 8)
{
#if HAVE_PNG_SET_EXPAND_GRAY_1_2_4_TO_8
ppng_set_expand_gray_1_2_4_to_8(This->png_ptr);
#else
ppng_set_gray_1_2_4_to_8(This->png_ptr);
#endif
bit_depth = 8;
}
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:
This->bpp = bit_depth;
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;
case PNG_COLOR_TYPE_GRAY_ALPHA:
/* WIC does not support grayscale alpha formats so use RGBA */
ppng_set_gray_to_rgb(This->png_ptr);
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_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;
}
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;
image_size = This->stride * This->height;
This->image_bits = HeapAlloc(GetProcessHeap(), 0, image_size);
if (!This->image_bits)
{
hr = E_OUTOFMEMORY;
goto end;
}
ppng_read_update_info(This->png_ptr, This->info_ptr);
This->initialized = TRUE;
end:
if (FAILED(hr))
ERR("PNG info parsing failed, hr=0x%08X\n", hr);
}
static void row_callback(png_structp png_ptr, png_bytep new_row,
png_uint_32 row_num, int pass)
{
png_bytep old_row;
PngDecoder *This;
This = (PngDecoder*) ppng_get_progressive_ptr(png_ptr);
if (!This->initialized)
return;
old_row = ((png_bytep)This->image_bits) + row_num*This->stride;
ppng_progressive_combine_row(png_ptr, old_row, new_row);
}
static void end_callback(png_structp png_ptr, png_infop info)
{
}
static HRESULT WINAPI PngDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
PngDecoder *This = (PngDecoder*)iface;
LARGE_INTEGER seek;
HRESULT hr=S_OK;
png_bytep *row_pointers=NULL;
jmp_buf jmpbuf;
BYTE buffer[8096];
ULONG bytesRead = 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;
}
/* set up setjmp/longjmp error handling */
if (setjmp(jmpbuf))
{
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, NULL);
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);
/* 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 progressive loading */
ppng_set_progressive_read_fn(This->png_ptr, (void*)This,
info_callback, row_callback, end_callback);
do
{
hr = IStream_Read(pIStream, buffer, sizeof(buffer), &bytesRead);
if (SUCCEEDED(hr))
ppng_process_data(This->png_ptr, This->info_ptr, buffer, bytesRead);
} while (bytesRead == sizeof(buffer));
if (hr == S_FALSE)
hr = S_OK;
if (FAILED(hr))
ERR("reading PNG file failed, error 0x%08X\n", hr);
if (!This->initialized)
hr = E_FAIL;
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)
{
FIXME("(%p,%p): stub\n", iface, ppIDecoderInfo);
return E_NOTIMPL;
}
static HRESULT WINAPI PngDecoder_CopyPalette(IWICBitmapDecoder *iface,
IWICPalette *pIPalette)
{
FIXME("(%p,%p): stub\n", iface, pIPalette);
return E_NOTIMPL;
}
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)
{
FIXME("(%p,%p): stub\n", iface, ppIBitmapSource);
return E_NOTIMPL;
}
static HRESULT WINAPI PngDecoder_GetColorContexts(IWICBitmapDecoder *iface,
UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
{
FIXME("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
return E_NOTIMPL;
}
static HRESULT WINAPI PngDecoder_GetThumbnail(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIThumbnail)
{
TRACE("(%p,%p)\n", iface, ppIThumbnail);
return WINCODEC_ERR_CODECNOTHUMBNAIL;
}
static HRESULT WINAPI PngDecoder_GetFrameCount(IWICBitmapDecoder *iface,
UINT *pCount)
{
*pCount = 1;
return S_OK;
}
static HRESULT WINAPI PngDecoder_GetFrame(IWICBitmapDecoder *iface,
UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
{
PngDecoder *This = (PngDecoder*)iface;
TRACE("(%p,%u,%p)\n", iface, index, ppIBitmapFrame);
if (!This->initialized) return WINCODEC_ERR_NOTINITIALIZED;
if (index != 0) return E_INVALIDARG;
IWICBitmapDecoder_AddRef(iface);
*ppIBitmapFrame = (void*)(&This->lpFrameVtbl);
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)
{
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) ||
IsEqualIID(&IID_IWICBitmapSource, iid) ||
IsEqualIID(&IID_IWICBitmapFrameDecode, iid))
{
*ppv = 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_frame(iface);
return IUnknown_AddRef((IUnknown*)This);
}
static ULONG WINAPI PngDecoder_Frame_Release(IWICBitmapFrameDecode *iface)
{
PngDecoder *This = impl_from_frame(iface);
return IUnknown_Release((IUnknown*)This);
}
static HRESULT WINAPI PngDecoder_Frame_GetSize(IWICBitmapFrameDecode *iface,
UINT *puiWidth, UINT *puiHeight)
{
PngDecoder *This = impl_from_frame(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_frame(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_frame(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_frame(iface);
png_uint_32 ret;
png_colorp png_palette;
int num_palette;
WICColor palette[256];
png_bytep trans;
int num_trans;
png_color_16p trans_values;
int i;
HRESULT hr=S_OK;
TRACE("(%p,%p)\n", iface, pIPalette);
EnterCriticalSection(&This->lock);
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;
}
for (i=0; i<num_palette; i++)
{
palette[i] = (0xff000000|
png_palette[i].red << 16|
png_palette[i].green << 8|
png_palette[i].blue);
}
ret = ppng_get_tRNS(This->png_ptr, This->info_ptr, &trans, &num_trans, &trans_values);
if (ret)
{
for (i=0; i<num_trans; i++)
{
palette[trans[i]] = 0x00000000;
}
}
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_frame(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)
{
FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
return E_NOTIMPL;
}
static HRESULT WINAPI PngDecoder_Frame_GetColorContexts(IWICBitmapFrameDecode *iface,
UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
{
FIXME("(%p,%u,%p,%p): stub\n", iface, cCount, ppIColorContexts, pcActualCount);
return E_NOTIMPL;
}
static HRESULT WINAPI PngDecoder_Frame_GetThumbnail(IWICBitmapFrameDecode *iface,
IWICBitmapSource **ppIThumbnail)
{
FIXME("(%p,%p): stub\n", iface, ppIThumbnail);
return E_NOTIMPL;
}
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
};
HRESULT PngDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
{
PngDecoder *This;
HRESULT ret;
TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
*ppv = NULL;
if (pUnkOuter) return CLASS_E_NOAGGREGATION;
if (!libpng_handle && !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->lpVtbl = &PngDecoder_Vtbl;
This->lpFrameVtbl = &PngDecoder_FrameVtbl;
This->ref = 1;
This->png_ptr = NULL;
This->info_ptr = NULL;
This->initialized = FALSE;
This->image_bits = NULL;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PngDecoder.lock");
ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
IUnknown_Release((IUnknown*)This);
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_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_WICPixelFormat32bppBGRA, 32, 8, PNG_COLOR_TYPE_RGB_ALPHA, 0, 1},
{&GUID_WICPixelFormat48bppRGB, 48, 16, PNG_COLOR_TYPE_RGB, 0, 0},
{&GUID_WICPixelFormat64bppRGBA, 64, 16, PNG_COLOR_TYPE_RGB_ALPHA, 0, 0},
{NULL},
};
typedef struct PngEncoder {
const IWICBitmapEncoderVtbl *lpVtbl;
const IWICBitmapFrameEncodeVtbl *lpFrameVtbl;
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;
} PngEncoder;
static inline PngEncoder *encoder_from_frame(IWICBitmapFrameEncode *iface)
{
return CONTAINING_RECORD(iface, PngEncoder, lpFrameVtbl);
}
static HRESULT WINAPI PngFrameEncode_QueryInterface(IWICBitmapFrameEncode *iface, REFIID iid,
void **ppv)
{
PngEncoder *This = encoder_from_frame(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->lpFrameVtbl;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI PngFrameEncode_AddRef(IWICBitmapFrameEncode *iface)
{
PngEncoder *This = encoder_from_frame(iface);
return IUnknown_AddRef((IUnknown*)This);
}
static ULONG WINAPI PngFrameEncode_Release(IWICBitmapFrameEncode *iface)
{
PngEncoder *This = encoder_from_frame(iface);
return IUnknown_Release((IUnknown*)This);
}
static HRESULT WINAPI PngFrameEncode_Initialize(IWICBitmapFrameEncode *iface,
IPropertyBag2 *pIEncoderOptions)
{
PngEncoder *This = encoder_from_frame(iface);
TRACE("(%p,%p)\n", iface, pIEncoderOptions);
EnterCriticalSection(&This->lock);
if (This->frame_initialized)
{
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_WRONGSTATE;
}
This->frame_initialized = TRUE;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PngFrameEncode_SetSize(IWICBitmapFrameEncode *iface,
UINT uiWidth, UINT uiHeight)
{
PngEncoder *This = encoder_from_frame(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 = encoder_from_frame(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 = encoder_from_frame(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 *pIPalette)
{
FIXME("(%p,%p): stub\n", iface, pIPalette);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
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 = encoder_from_frame(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)
{
ppng_set_IHDR(This->png_ptr, This->info_ptr, This->width, This->height,
This->format->bit_depth, This->format->color_type, 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);
}
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);
This->info_written = TRUE;
}
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 = encoder_from_frame(iface);
HRESULT hr;
WICRect rc;
WICPixelFormatGUID guid;
UINT stride;
BYTE *pixeldata;
TRACE("(%p,%p,%p)\n", iface, pIBitmapSource, prc);
if (!This->frame_initialized || !This->width || !This->height)
return WINCODEC_ERR_WRONGSTATE;
if (!This->format)
{
hr = IWICBitmapSource_GetPixelFormat(pIBitmapSource, &guid);
if (FAILED(hr)) return hr;
hr = IWICBitmapFrameEncode_SetPixelFormat(iface, &guid);
if (FAILED(hr)) return hr;
}
hr = IWICBitmapSource_GetPixelFormat(pIBitmapSource, &guid);
if (FAILED(hr)) return hr;
if (memcmp(&guid, This->format->guid, sizeof(GUID)) != 0)
{
/* FIXME: should use WICConvertBitmapSource to convert */
ERR("format %s unsupported\n", debugstr_guid(&guid));
return E_FAIL;
}
if (This->xres == 0.0 || This->yres == 0.0)
{
double xres, yres;
hr = IWICBitmapSource_GetResolution(pIBitmapSource, &xres, &yres);
if (FAILED(hr)) return hr;
hr = IWICBitmapFrameEncode_SetResolution(iface, xres, yres);
if (FAILED(hr)) return hr;
}
if (!prc)
{
UINT width, height;
hr = IWICBitmapSource_GetSize(pIBitmapSource, &width, &height);
if (FAILED(hr)) return hr;
rc.X = 0;
rc.Y = 0;
rc.Width = width;
rc.Height = height;
prc = &rc;
}
if (prc->Width != This->width) return E_INVALIDARG;
stride = (This->format->bpp * This->width + 7)/8;
pixeldata = HeapAlloc(GetProcessHeap(), 0, stride * prc->Height);
if (!pixeldata) return E_OUTOFMEMORY;
hr = IWICBitmapSource_CopyPixels(pIBitmapSource, prc, stride,
stride*prc->Height, pixeldata);
if (SUCCEEDED(hr))
{
hr = IWICBitmapFrameEncode_WritePixels(iface, prc->Height, stride,
stride*prc->Height, pixeldata);
}
HeapFree(GetProcessHeap(), 0, pixeldata);
return hr;
}
static HRESULT WINAPI PngFrameEncode_Commit(IWICBitmapFrameEncode *iface)
{
PngEncoder *This = encoder_from_frame(iface);
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);
return E_FAIL;
}
ppng_set_error_fn(This->png_ptr, &jmpbuf, user_error_fn, user_warning_fn);
ppng_write_end(This->png_ptr, This->info_ptr);
This->frame_committed = TRUE;
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 = (PngEncoder*)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;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI PngEncoder_AddRef(IWICBitmapEncoder *iface)
{
PngEncoder *This = (PngEncoder*)iface;
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI PngEncoder_Release(IWICBitmapEncoder *iface)
{
PngEncoder *This = (PngEncoder*)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);
}
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 = (PngEncoder*)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 *pIPalette)
{
TRACE("(%p,%p)\n", iface, pIPalette);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
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 = (PngEncoder*)iface;
HRESULT hr;
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;
}
hr = CreatePropertyBag2(ppIEncoderOptions);
if (FAILED(hr))
{
LeaveCriticalSection(&This->lock);
return hr;
}
This->frame_count = 1;
LeaveCriticalSection(&This->lock);
IWICBitmapEncoder_AddRef(iface);
*ppIFrameEncode = (IWICBitmapFrameEncode*)&This->lpFrameVtbl;
return S_OK;
}
static HRESULT WINAPI PngEncoder_Commit(IWICBitmapEncoder *iface)
{
PngEncoder *This = (PngEncoder*)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(IUnknown *pUnkOuter, REFIID iid, void** ppv)
{
PngEncoder *This;
HRESULT ret;
TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
*ppv = NULL;
if (pUnkOuter) return CLASS_E_NOAGGREGATION;
if (!libpng_handle && !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->lpVtbl = &PngEncoder_Vtbl;
This->lpFrameVtbl = &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;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PngEncoder.lock");
ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
IUnknown_Release((IUnknown*)This);
return ret;
}
#else /* !HAVE_PNG_H */
HRESULT PngDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
{
ERR("Trying to load PNG picture, but PNG support is not compiled in.\n");
return E_FAIL;
}
HRESULT PngEncoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
{
ERR("Trying to save PNG picture, but PNG support is not compiled in.\n");
return E_FAIL;
}
#endif