Sweden-Number/dlls/windowscodecs/pngformat.c

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/*
* 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_destroy_read_struct);
MAKE_FUNCPTR(png_error);
MAKE_FUNCPTR(png_get_bit_depth);
MAKE_FUNCPTR(png_get_color_type);
MAKE_FUNCPTR(png_get_image_height);
MAKE_FUNCPTR(png_get_image_width);
MAKE_FUNCPTR(png_get_io_ptr);
MAKE_FUNCPTR(png_get_PLTE);
MAKE_FUNCPTR(png_get_tRNS);
MAKE_FUNCPTR(png_set_bgr);
MAKE_FUNCPTR(png_set_gray_1_2_4_to_8);
MAKE_FUNCPTR(png_set_gray_to_rgb);
MAKE_FUNCPTR(png_set_read_fn);
MAKE_FUNCPTR(png_set_strip_16);
MAKE_FUNCPTR(png_set_tRNS_to_alpha);
MAKE_FUNCPTR(png_read_end);
MAKE_FUNCPTR(png_read_image);
MAKE_FUNCPTR(png_read_info);
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#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_destroy_read_struct);
LOAD_FUNCPTR(png_error);
LOAD_FUNCPTR(png_get_bit_depth);
LOAD_FUNCPTR(png_get_color_type);
LOAD_FUNCPTR(png_get_image_height);
LOAD_FUNCPTR(png_get_image_width);
LOAD_FUNCPTR(png_get_io_ptr);
LOAD_FUNCPTR(png_get_PLTE);
LOAD_FUNCPTR(png_get_tRNS);
LOAD_FUNCPTR(png_set_bgr);
LOAD_FUNCPTR(png_set_gray_1_2_4_to_8);
LOAD_FUNCPTR(png_set_gray_to_rgb);
LOAD_FUNCPTR(png_set_read_fn);
LOAD_FUNCPTR(png_set_strip_16);
LOAD_FUNCPTR(png_set_tRNS_to_alpha);
LOAD_FUNCPTR(png_read_end);
LOAD_FUNCPTR(png_read_image);
LOAD_FUNCPTR(png_read_info);
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#undef LOAD_FUNCPTR
}
return libpng_handle;
}
typedef struct {
const IWICBitmapDecoderVtbl *lpVtbl;
const IWICBitmapFrameDecodeVtbl *lpFrameVtbl;
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LONG ref;
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;
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} PngDecoder;
static inline PngDecoder *impl_from_frame(IWICBitmapFrameDecode *iface)
{
return CONTAINING_RECORD(iface, PngDecoder, lpFrameVtbl);
}
static const IWICBitmapFrameDecodeVtbl PngDecoder_FrameVtbl;
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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, &This->end_info);
HeapFree(GetProcessHeap(), 0, This->image_bits);
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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 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");
}
}
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static HRESULT WINAPI PngDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
PngDecoder *This = (PngDecoder*)iface;
LARGE_INTEGER seek;
HRESULT hr;
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;
TRACE("(%p,%p,%x)\n", iface, pIStream, cacheOptions);
/* initialize libpng */
This->png_ptr = ppng_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!This->png_ptr) return E_FAIL;
This->info_ptr = ppng_create_info_struct(This->png_ptr);
if (!This->info_ptr)
{
ppng_destroy_read_struct(&This->png_ptr, (png_infopp)NULL, (png_infopp)NULL);
This->png_ptr = NULL;
return E_FAIL;
}
This->end_info = ppng_create_info_struct(This->png_ptr);
if (!This->info_ptr)
{
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, (png_infopp)NULL);
This->png_ptr = NULL;
return E_FAIL;
}
/* set up setjmp/longjmp error handling */
if (setjmp(png_jmpbuf(This->png_ptr)))
{
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, &This->end_info);
HeapFree(GetProcessHeap(), 0, row_pointers);
This->png_ptr = NULL;
return E_FAIL;
}
/* seek to the start of the stream */
seek.QuadPart = 0;
hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) return hr;
/* 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_PALETTE)
{
/* expand to RGBA */
if (color_type == PNG_COLOR_TYPE_GRAY)
{
if (bit_depth < 8)
{
ppng_set_gray_1_2_4_to_8(This->png_ptr);
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);
return E_FAIL;
}
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);
return E_FAIL;
}
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);
return E_FAIL;
}
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);
return E_FAIL;
}
break;
default:
ERR("invalid color type %i\n", color_type);
return E_FAIL;
}
/* 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;
image_size = This->stride * This->height;
This->image_bits = HeapAlloc(GetProcessHeap(), 0, image_size);
if (!This->image_bits) return E_OUTOFMEMORY;
row_pointers = HeapAlloc(GetProcessHeap(), 0, sizeof(png_bytep)*This->height);
if (!row_pointers) return E_OUTOFMEMORY;
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);
This->initialized = TRUE;
return S_OK;
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}
static HRESULT WINAPI PngDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
GUID *pguidContainerFormat)
{
memcpy(pguidContainerFormat, &GUID_ContainerFormatPng, sizeof(GUID));
return S_OK;
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}
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;
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}
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;
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}
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)
{
FIXME("(%p,%p,%p): stub\n", iface, pDpiX, pDpiY);
return E_NOTIMPL;
}
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;
TRACE("(%p,%p)\n", iface, pIPalette);
ret = ppng_get_PLTE(This->png_ptr, This->info_ptr, &png_palette, &num_palette);
if (!ret) return WINCODEC_ERR_PALETTEUNAVAILABLE;
if (num_palette > 256)
{
ERR("palette has %i colors?!\n", num_palette);
return E_FAIL;
}
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;
}
}
return IWICPalette_InitializeCustom(pIPalette, palette, num_palette);
}
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
};
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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;
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This->ref = 1;
This->png_ptr = NULL;
This->info_ptr = NULL;
This->end_info = NULL;
This->initialized = FALSE;
This->image_bits = NULL;
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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 supported not compiled in.\n");
return E_FAIL;
}
#endif