--- /dev/null
+/*
+ * 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 "wincodecs_private.h"
+
+#include <winerror.h>
+
+#ifdef HAVE_PNG_H
+#include <png.h>
+#endif
+
+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;
+ png_colorp png_palette;
+ int num_palette;
+ 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 = WINCODEC_ERR_UNKNOWNIMAGEFORMAT;
+ 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 (!ppng_get_PLTE(This->png_ptr, This->info_ptr, &png_palette, &num_palette))
+ num_palette = 0;
+
+ TRACE("color_type %d, bit_depth %d, transparency %d, num_palette %d\n",
+ color_type, bit_depth, transparency, num_palette);
+
+ switch (color_type)
+ {
+ case PNG_COLOR_TYPE_GRAY:
+ This->bpp = bit_depth;
+ switch (bit_depth)
+ {
+ case 1:
+ This->format = num_palette ? &GUID_WICPixelFormat1bppIndexed : &GUID_WICPixelFormatBlackWhite;
+ break;
+ case 2:
+ This->format = num_palette ? &GUID_WICPixelFormat2bppIndexed : &GUID_WICPixelFormat2bppGray;
+ break;
+ case 4:
+ This->format = num_palette ? &GUID_WICPixelFormat4bppIndexed : &GUID_WICPixelFormat4bppGray;
+ break;
+ case 8:
+ This->format = num_palette ? &GUID_WICPixelFormat8bppIndexed : &GUID_WICPixelFormat8bppGray;
+ break;
+ case 16: This->format = &GUID_WICPixelFormat16bppGray; break;
+ default:
+ ERR("invalid grayscale bit depth: %i\n", bit_depth);
+ hr = WINCODEC_ERR_UNKNOWNIMAGEFORMAT;
+ 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);
+ /* 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_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 **reader)
+{
+ FIXME("(%p,%p): stub\n", iface, reader);
+
+ if (!reader) return E_INVALIDARG;
+
+ *reader = NULL;
+ return WINCODEC_ERR_UNSUPPORTEDOPERATION;
+}
+
+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;
+ 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);
+
+ 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);
+ }
+
+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 = 1 << This->format->bit_depth;
+
+ for (i = 0; i < colors; i++)
+ {
+ if (i < This->colors)
+ {
+ 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++;
+ }
+ else
+ {
+ png_palette[i].red = 0;
+ png_palette[i].green = 0;
+ png_palette[i].blue = 0;
+ }
+ }
+
+ 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, colors, 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 **info)
+{
+ IWICComponentInfo *comp_info;
+ HRESULT hr;
+
+ TRACE("%p,%p\n", iface, info);
+
+ if (!info) return E_INVALIDARG;
+
+ hr = CreateComponentInfo(&CLSID_WICPngEncoder, &comp_info);
+ if (hr == S_OK)
+ {
+ hr = IWICComponentInfo_QueryInterface(comp_info, &IID_IWICBitmapEncoderInfo, (void **)info);
+ IWICComponentInfo_Release(comp_info);
+ }
+ return hr;
+}
+
+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
projects / reactos.git / blobdiff