Sweden-Number/dlls/windowscodecs/pngformat.c

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/*
* Copyright 2009 Vincent Povirk for CodeWeavers
* Copyright 2016 Dmitry Timoshkov
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*
* 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 <stdarg.h>
#define NONAMELESSUNION
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#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "objbase.h"
#include "wincodecs_private.h"
#include "wine/debug.h"
static inline ULONG read_ulong_be(BYTE* data)
{
return data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
}
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.pszVal = name;
result[0].value.vt = VT_LPSTR;
result[0].value.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;
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(L"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, L"ImageGamma", sizeof(L"ImageGamma"));
result[0].id.vt = VT_LPWSTR;
result[0].id.pwszVal = name;
result[0].value.vt = VT_UI4;
result[0].value.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] = {
L"WhitePointX",
L"WhitePointY",
L"RedX",
L"RedY",
L"GreenX",
L"GreenY",
L"BlueX",
L"BlueY",
};
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.pwszVal = dyn_names[i];
lstrcpyW(dyn_names[i], names[i]);
PropVariantInit(&result[i].value);
result[i].value.vt = VT_UI4;
result[i].value.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);
}
HRESULT PngDecoder_CreateInstance(REFIID iid, void** ppv)
{
HRESULT hr;
struct decoder *decoder;
struct decoder_info decoder_info;
hr = png_decoder_create(&decoder_info, &decoder);
if (SUCCEEDED(hr))
hr = CommonDecoder_CreateInstance(decoder, &decoder_info, iid, ppv);
return hr;
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}
HRESULT PngEncoder_CreateInstance(REFIID iid, void** ppv)
{
HRESULT hr;
struct encoder *encoder;
struct encoder_info encoder_info;
hr = png_encoder_create(&encoder_info, &encoder);
if (SUCCEEDED(hr))
hr = CommonEncoder_CreateInstance(encoder, &encoder_info, iid, ppv);
return hr;
}