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![Torge Matthies](/assets/img/avatar_default.png)
Reading a PNG file with libpng with a chunk bigger than the 8 MiB default chunk size limit set by libpng results in a libpng error, e.g. "iTXt: chunk data is too large" for a too big iTXt chunk. Fix this by disabling the chunk size limit. Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52147 Signed-off-by: Torge Matthies <openglfreak@googlemail.com> Signed-off-by: Esme Povirk <esme@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
846 lines
25 KiB
C
846 lines
25 KiB
C
/*
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* Copyright 2016 Dmitry Timoshkov
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* Copyright 2020 Esme Povirk
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include <png.h>
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#define NONAMELESSUNION
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "winbase.h"
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#include "objbase.h"
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#include "wincodecs_private.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
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struct png_decoder
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{
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struct decoder decoder;
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IStream *stream;
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struct decoder_frame decoder_frame;
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UINT stride;
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BYTE *image_bits;
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BYTE *color_profile;
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DWORD color_profile_len;
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};
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static inline struct png_decoder *impl_from_decoder(struct decoder* iface)
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{
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return CONTAINING_RECORD(iface, struct png_decoder, decoder);
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}
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static void user_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
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{
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IStream *stream = png_get_io_ptr(png_ptr);
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HRESULT hr;
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ULONG bytesread;
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hr = stream_read(stream, data, length, &bytesread);
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if (FAILED(hr) || bytesread != length)
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{
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png_error(png_ptr, "failed reading data");
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}
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}
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static HRESULT CDECL png_decoder_initialize(struct decoder *iface, IStream *stream, struct decoder_stat *st)
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{
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struct png_decoder *This = impl_from_decoder(iface);
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png_structp png_ptr;
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png_infop info_ptr;
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HRESULT hr = E_FAIL;
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int color_type, bit_depth;
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png_bytep trans;
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int num_trans;
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png_uint_32 transparency;
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png_color_16p trans_values;
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png_uint_32 ret, xres, yres;
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int unit_type;
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png_colorp png_palette;
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int num_palette;
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int i;
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UINT image_size;
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png_bytep *row_pointers=NULL;
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png_charp cp_name;
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png_bytep cp_profile;
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png_uint_32 cp_len;
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int cp_compression;
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png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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if (!png_ptr)
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{
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return E_FAIL;
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}
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info_ptr = png_create_info_struct(png_ptr);
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if (!info_ptr)
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{
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png_destroy_read_struct(&png_ptr, NULL, NULL);
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return E_FAIL;
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}
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/* set up setjmp/longjmp error handling */
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if (setjmp(png_jmpbuf(png_ptr)))
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{
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hr = WINCODEC_ERR_UNKNOWNIMAGEFORMAT;
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goto end;
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}
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png_set_crc_action(png_ptr, PNG_CRC_QUIET_USE, PNG_CRC_QUIET_USE);
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png_set_chunk_malloc_max(png_ptr, 0);
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/* seek to the start of the stream */
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hr = stream_seek(stream, 0, STREAM_SEEK_SET, NULL);
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if (FAILED(hr))
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{
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goto end;
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}
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/* set up custom i/o handling */
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png_set_read_fn(png_ptr, stream, user_read_data);
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/* read the header */
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png_read_info(png_ptr, info_ptr);
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/* choose a pixel format */
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color_type = png_get_color_type(png_ptr, info_ptr);
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bit_depth = png_get_bit_depth(png_ptr, info_ptr);
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/* PNGs with bit-depth greater than 8 are network byte order. Windows does not expect this. */
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if (bit_depth > 8)
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png_set_swap(png_ptr);
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/* check for color-keyed alpha */
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transparency = png_get_tRNS(png_ptr, info_ptr, &trans, &num_trans, &trans_values);
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if (!transparency)
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num_trans = 0;
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if (transparency && (color_type == PNG_COLOR_TYPE_RGB ||
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(color_type == PNG_COLOR_TYPE_GRAY && bit_depth == 16)))
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{
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/* expand to RGBA */
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if (color_type == PNG_COLOR_TYPE_GRAY)
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png_set_gray_to_rgb(png_ptr);
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png_set_tRNS_to_alpha(png_ptr);
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color_type = PNG_COLOR_TYPE_RGB_ALPHA;
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}
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switch (color_type)
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{
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case PNG_COLOR_TYPE_GRAY_ALPHA:
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/* WIC does not support grayscale alpha formats so use RGBA */
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png_set_gray_to_rgb(png_ptr);
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/* fall through */
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case PNG_COLOR_TYPE_RGB_ALPHA:
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This->decoder_frame.bpp = bit_depth * 4;
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switch (bit_depth)
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{
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case 8:
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png_set_bgr(png_ptr);
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This->decoder_frame.pixel_format = GUID_WICPixelFormat32bppBGRA;
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break;
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case 16: This->decoder_frame.pixel_format = GUID_WICPixelFormat64bppRGBA; break;
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default:
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ERR("invalid RGBA bit depth: %i\n", bit_depth);
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hr = E_FAIL;
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goto end;
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}
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break;
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case PNG_COLOR_TYPE_GRAY:
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This->decoder_frame.bpp = bit_depth;
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if (!transparency)
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{
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switch (bit_depth)
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{
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case 1: This->decoder_frame.pixel_format = GUID_WICPixelFormatBlackWhite; break;
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case 2: This->decoder_frame.pixel_format = GUID_WICPixelFormat2bppGray; break;
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case 4: This->decoder_frame.pixel_format = GUID_WICPixelFormat4bppGray; break;
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case 8: This->decoder_frame.pixel_format = GUID_WICPixelFormat8bppGray; break;
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case 16: This->decoder_frame.pixel_format = GUID_WICPixelFormat16bppGray; break;
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default:
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ERR("invalid grayscale bit depth: %i\n", bit_depth);
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hr = E_FAIL;
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goto end;
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}
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break;
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}
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/* else fall through */
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case PNG_COLOR_TYPE_PALETTE:
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This->decoder_frame.bpp = bit_depth;
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switch (bit_depth)
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{
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case 1: This->decoder_frame.pixel_format = GUID_WICPixelFormat1bppIndexed; break;
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case 2: This->decoder_frame.pixel_format = GUID_WICPixelFormat2bppIndexed; break;
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case 4: This->decoder_frame.pixel_format = GUID_WICPixelFormat4bppIndexed; break;
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case 8: This->decoder_frame.pixel_format = GUID_WICPixelFormat8bppIndexed; break;
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default:
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ERR("invalid indexed color bit depth: %i\n", bit_depth);
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hr = E_FAIL;
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goto end;
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}
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break;
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case PNG_COLOR_TYPE_RGB:
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This->decoder_frame.bpp = bit_depth * 3;
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switch (bit_depth)
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{
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case 8:
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png_set_bgr(png_ptr);
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This->decoder_frame.pixel_format = GUID_WICPixelFormat24bppBGR;
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break;
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case 16: This->decoder_frame.pixel_format = GUID_WICPixelFormat48bppRGB; break;
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default:
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ERR("invalid RGB color bit depth: %i\n", bit_depth);
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hr = E_FAIL;
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goto end;
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}
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break;
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default:
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ERR("invalid color type %i\n", color_type);
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hr = E_FAIL;
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goto end;
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}
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This->decoder_frame.width = png_get_image_width(png_ptr, info_ptr);
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This->decoder_frame.height = png_get_image_height(png_ptr, info_ptr);
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ret = png_get_pHYs(png_ptr, info_ptr, &xres, &yres, &unit_type);
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if (ret && unit_type == PNG_RESOLUTION_METER)
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{
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This->decoder_frame.dpix = xres * 0.0254;
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This->decoder_frame.dpiy = yres * 0.0254;
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}
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else
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{
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WARN("no pHYs block present\n");
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This->decoder_frame.dpix = This->decoder_frame.dpiy = 96.0;
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}
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ret = png_get_iCCP(png_ptr, info_ptr, &cp_name, &cp_compression, &cp_profile, &cp_len);
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if (ret)
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{
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This->decoder_frame.num_color_contexts = 1;
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This->color_profile_len = cp_len;
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This->color_profile = malloc(cp_len);
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if (!This->color_profile)
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{
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hr = E_OUTOFMEMORY;
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goto end;
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}
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memcpy(This->color_profile, cp_profile, cp_len);
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}
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else
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This->decoder_frame.num_color_contexts = 0;
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if (color_type == PNG_COLOR_TYPE_PALETTE)
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{
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ret = png_get_PLTE(png_ptr, info_ptr, &png_palette, &num_palette);
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if (!ret)
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{
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ERR("paletted image with no PLTE chunk\n");
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hr = E_FAIL;
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goto end;
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}
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if (num_palette > 256)
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{
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ERR("palette has %i colors?!\n", num_palette);
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hr = E_FAIL;
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goto end;
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}
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This->decoder_frame.num_colors = num_palette;
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for (i=0; i<num_palette; i++)
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{
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BYTE alpha = (i < num_trans) ? trans[i] : 0xff;
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This->decoder_frame.palette[i] = (alpha << 24 |
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png_palette[i].red << 16|
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png_palette[i].green << 8|
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png_palette[i].blue);
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}
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}
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else if (color_type == PNG_COLOR_TYPE_GRAY && transparency && bit_depth <= 8) {
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num_palette = 1 << bit_depth;
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This->decoder_frame.num_colors = num_palette;
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for (i=0; i<num_palette; i++)
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{
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BYTE alpha = (i == trans_values[0].gray) ? 0 : 0xff;
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BYTE val = i * 255 / (num_palette - 1);
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This->decoder_frame.palette[i] = (alpha << 24 | val << 16 | val << 8 | val);
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}
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}
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else
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{
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This->decoder_frame.num_colors = 0;
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}
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This->stride = (This->decoder_frame.width * This->decoder_frame.bpp + 7) / 8;
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image_size = This->stride * This->decoder_frame.height;
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This->image_bits = malloc(image_size);
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if (!This->image_bits)
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{
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hr = E_OUTOFMEMORY;
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goto end;
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}
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row_pointers = malloc(sizeof(png_bytep)*This->decoder_frame.height);
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if (!row_pointers)
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{
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hr = E_OUTOFMEMORY;
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goto end;
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}
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for (i=0; i<This->decoder_frame.height; i++)
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row_pointers[i] = This->image_bits + i * This->stride;
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png_read_image(png_ptr, row_pointers);
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free(row_pointers);
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row_pointers = NULL;
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/* png_read_end intentionally not called to not seek to the end of the file */
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st->flags = WICBitmapDecoderCapabilityCanDecodeAllImages |
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WICBitmapDecoderCapabilityCanDecodeSomeImages |
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WICBitmapDecoderCapabilityCanEnumerateMetadata;
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st->frame_count = 1;
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This->stream = stream;
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hr = S_OK;
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end:
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png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
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free(row_pointers);
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if (FAILED(hr))
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{
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free(This->image_bits);
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This->image_bits = NULL;
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free(This->color_profile);
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This->color_profile = NULL;
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}
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return hr;
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}
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static HRESULT CDECL png_decoder_get_frame_info(struct decoder *iface, UINT frame, struct decoder_frame *info)
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{
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struct png_decoder *This = impl_from_decoder(iface);
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*info = This->decoder_frame;
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return S_OK;
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}
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static HRESULT CDECL png_decoder_copy_pixels(struct decoder *iface, UINT frame,
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const WICRect *prc, UINT stride, UINT buffersize, BYTE *buffer)
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{
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struct png_decoder *This = impl_from_decoder(iface);
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return copy_pixels(This->decoder_frame.bpp, This->image_bits,
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This->decoder_frame.width, This->decoder_frame.height, This->stride,
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prc, stride, buffersize, buffer);
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}
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static HRESULT CDECL png_decoder_get_metadata_blocks(struct decoder* iface,
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UINT frame, UINT *count, struct decoder_block **blocks)
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{
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struct png_decoder *This = impl_from_decoder(iface);
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HRESULT hr;
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struct decoder_block *result = NULL;
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ULONGLONG seek;
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BYTE chunk_type[4];
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ULONG chunk_size;
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ULONGLONG chunk_start;
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ULONG metadata_blocks_size = 0;
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seek = 8;
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*count = 0;
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do
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{
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hr = stream_seek(This->stream, seek, STREAM_SEEK_SET, &chunk_start);
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if (FAILED(hr)) goto end;
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hr = read_png_chunk(This->stream, chunk_type, NULL, &chunk_size);
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if (FAILED(hr)) goto end;
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if (chunk_type[0] >= 'a' && chunk_type[0] <= 'z' &&
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memcmp(chunk_type, "tRNS", 4) && memcmp(chunk_type, "pHYs", 4))
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{
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/* This chunk is considered metadata. */
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if (*count == metadata_blocks_size)
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{
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struct decoder_block *new_metadata_blocks;
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ULONG new_metadata_blocks_size;
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new_metadata_blocks_size = 4 + metadata_blocks_size * 2;
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new_metadata_blocks = RtlAllocateHeap(GetProcessHeap(), 0,
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new_metadata_blocks_size * sizeof(*new_metadata_blocks));
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if (!new_metadata_blocks)
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{
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hr = E_OUTOFMEMORY;
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goto end;
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}
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memcpy(new_metadata_blocks, result,
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*count * sizeof(*new_metadata_blocks));
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RtlFreeHeap(GetProcessHeap(), 0, result);
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result = new_metadata_blocks;
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metadata_blocks_size = new_metadata_blocks_size;
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}
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result[*count].offset = chunk_start;
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result[*count].length = chunk_size + 12;
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result[*count].options = WICMetadataCreationAllowUnknown;
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(*count)++;
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}
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seek = chunk_start + chunk_size + 12; /* skip data and CRC */
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} while (memcmp(chunk_type, "IEND", 4));
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end:
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if (SUCCEEDED(hr))
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{
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*blocks = result;
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}
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else
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{
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*count = 0;
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*blocks = NULL;
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RtlFreeHeap(GetProcessHeap(), 0, result);
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}
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return hr;
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}
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static HRESULT CDECL png_decoder_get_color_context(struct decoder* iface, UINT frame, UINT num,
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BYTE **data, DWORD *datasize)
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{
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struct png_decoder *This = impl_from_decoder(iface);
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*data = RtlAllocateHeap(GetProcessHeap(), 0, This->color_profile_len);
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*datasize = This->color_profile_len;
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if (!*data)
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return E_OUTOFMEMORY;
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memcpy(*data, This->color_profile, This->color_profile_len);
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return S_OK;
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}
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static void CDECL png_decoder_destroy(struct decoder* iface)
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{
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struct png_decoder *This = impl_from_decoder(iface);
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free(This->image_bits);
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free(This->color_profile);
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RtlFreeHeap(GetProcessHeap(), 0, This);
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}
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static const struct decoder_funcs png_decoder_vtable = {
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png_decoder_initialize,
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png_decoder_get_frame_info,
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png_decoder_copy_pixels,
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png_decoder_get_metadata_blocks,
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png_decoder_get_color_context,
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png_decoder_destroy
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};
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HRESULT CDECL png_decoder_create(struct decoder_info *info, struct decoder **result)
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{
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struct png_decoder *This;
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This = RtlAllocateHeap(GetProcessHeap(), 0, sizeof(*This));
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if (!This)
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{
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return E_OUTOFMEMORY;
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}
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This->decoder.vtable = &png_decoder_vtable;
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This->image_bits = NULL;
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This->color_profile = NULL;
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*result = &This->decoder;
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info->container_format = GUID_ContainerFormatPng;
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info->block_format = GUID_ContainerFormatPng;
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info->clsid = CLSID_WICPngDecoder;
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return S_OK;
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}
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struct png_pixelformat {
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const WICPixelFormatGUID *guid;
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UINT bpp;
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int bit_depth;
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int color_type;
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BOOL remove_filler;
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BOOL swap_rgb;
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};
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static const struct png_pixelformat formats[] = {
|
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{&GUID_WICPixelFormat32bppBGRA, 32, 8, PNG_COLOR_TYPE_RGB_ALPHA, 0, 1},
|
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{&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},
|
|
};
|
|
|
|
struct png_encoder
|
|
{
|
|
struct encoder encoder;
|
|
IStream *stream;
|
|
png_structp png_ptr;
|
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png_infop info_ptr;
|
|
struct encoder_frame encoder_frame;
|
|
const struct png_pixelformat *format;
|
|
BYTE *data;
|
|
UINT stride;
|
|
UINT passes;
|
|
UINT lines_written;
|
|
};
|
|
|
|
static inline struct png_encoder *impl_from_encoder(struct encoder* iface)
|
|
{
|
|
return CONTAINING_RECORD(iface, struct png_encoder, encoder);
|
|
}
|
|
|
|
static void user_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
|
{
|
|
struct png_encoder *This = png_get_io_ptr(png_ptr);
|
|
HRESULT hr;
|
|
ULONG byteswritten;
|
|
|
|
hr = stream_write(This->stream, data, length, &byteswritten);
|
|
if (FAILED(hr) || byteswritten != length)
|
|
{
|
|
png_error(png_ptr, "failed writing data");
|
|
}
|
|
}
|
|
|
|
static void user_flush(png_structp png_ptr)
|
|
{
|
|
}
|
|
|
|
static HRESULT CDECL png_encoder_initialize(struct encoder *encoder, IStream *stream)
|
|
{
|
|
struct png_encoder *This = impl_from_encoder(encoder);
|
|
|
|
TRACE("(%p,%p)\n", encoder, stream);
|
|
|
|
/* initialize libpng */
|
|
This->png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
|
|
if (!This->png_ptr)
|
|
return E_FAIL;
|
|
|
|
This->info_ptr = png_create_info_struct(This->png_ptr);
|
|
if (!This->info_ptr)
|
|
{
|
|
png_destroy_write_struct(&This->png_ptr, NULL);
|
|
This->png_ptr = NULL;
|
|
return E_FAIL;
|
|
}
|
|
|
|
This->stream = stream;
|
|
|
|
/* set up setjmp/longjmp error handling */
|
|
if (setjmp(png_jmpbuf(This->png_ptr)))
|
|
{
|
|
png_destroy_write_struct(&This->png_ptr, &This->info_ptr);
|
|
This->png_ptr = NULL;
|
|
This->stream = NULL;
|
|
return E_FAIL;
|
|
}
|
|
|
|
/* set up custom i/o handling */
|
|
png_set_write_fn(This->png_ptr, This, user_write_data, user_flush);
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
static HRESULT CDECL png_encoder_get_supported_format(struct encoder* iface, GUID *pixel_format, DWORD *bpp, BOOL *indexed)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; formats[i].guid; i++)
|
|
{
|
|
if (memcmp(formats[i].guid, pixel_format, sizeof(GUID)) == 0)
|
|
break;
|
|
}
|
|
|
|
if (!formats[i].guid)
|
|
i = 0;
|
|
|
|
*pixel_format = *formats[i].guid;
|
|
*bpp = formats[i].bpp;
|
|
*indexed = (formats[i].color_type == PNG_COLOR_TYPE_PALETTE);
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
static HRESULT CDECL png_encoder_create_frame(struct encoder *encoder, const struct encoder_frame *encoder_frame)
|
|
{
|
|
struct png_encoder *This = impl_from_encoder(encoder);
|
|
int i;
|
|
|
|
for (i=0; formats[i].guid; i++)
|
|
{
|
|
if (memcmp(formats[i].guid, &encoder_frame->pixel_format, sizeof(GUID)) == 0)
|
|
{
|
|
This->format = &formats[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!formats[i].guid)
|
|
{
|
|
ERR("invalid pixel format %s\n", wine_dbgstr_guid(&encoder_frame->pixel_format));
|
|
return E_FAIL;
|
|
}
|
|
|
|
/* set up setjmp/longjmp error handling */
|
|
if (setjmp(png_jmpbuf(This->png_ptr)))
|
|
return E_FAIL;
|
|
|
|
This->encoder_frame = *encoder_frame;
|
|
This->lines_written = 0;
|
|
|
|
if (encoder_frame->interlace)
|
|
{
|
|
/* libpng requires us to write all data multiple times in this case. */
|
|
This->stride = (This->format->bpp * encoder_frame->width + 7)/8;
|
|
This->data = malloc(encoder_frame->height * This->stride);
|
|
if (!This->data)
|
|
return E_OUTOFMEMORY;
|
|
}
|
|
|
|
/* Tell PNG we need to byte swap if writing a >8-bpp image */
|
|
if (This->format->bit_depth > 8)
|
|
png_set_swap(This->png_ptr);
|
|
|
|
png_set_IHDR(This->png_ptr, This->info_ptr, encoder_frame->width, encoder_frame->height,
|
|
This->format->bit_depth, This->format->color_type,
|
|
encoder_frame->interlace ? PNG_INTERLACE_ADAM7 : PNG_INTERLACE_NONE,
|
|
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
|
|
|
|
if (encoder_frame->dpix != 0.0 && encoder_frame->dpiy != 0.0)
|
|
{
|
|
png_set_pHYs(This->png_ptr, This->info_ptr, (encoder_frame->dpix+0.0127) / 0.0254,
|
|
(encoder_frame->dpiy+0.0127) / 0.0254, PNG_RESOLUTION_METER);
|
|
}
|
|
|
|
if (This->format->color_type == PNG_COLOR_TYPE_PALETTE && encoder_frame->num_colors)
|
|
{
|
|
png_color png_palette[256];
|
|
png_byte trans[256];
|
|
UINT i, num_trans = 0, colors;
|
|
|
|
/* Newer libpng versions don't accept larger palettes than the declared
|
|
* bit depth, so we need to generate the palette of the correct length.
|
|
*/
|
|
colors = min(encoder_frame->num_colors, 1 << This->format->bit_depth);
|
|
|
|
for (i = 0; i < colors; i++)
|
|
{
|
|
png_palette[i].red = (encoder_frame->palette[i] >> 16) & 0xff;
|
|
png_palette[i].green = (encoder_frame->palette[i] >> 8) & 0xff;
|
|
png_palette[i].blue = encoder_frame->palette[i] & 0xff;
|
|
trans[i] = (encoder_frame->palette[i] >> 24) & 0xff;
|
|
if (trans[i] != 0xff)
|
|
num_trans = i+1;
|
|
}
|
|
|
|
png_set_PLTE(This->png_ptr, This->info_ptr, png_palette, colors);
|
|
|
|
if (num_trans)
|
|
png_set_tRNS(This->png_ptr, This->info_ptr, trans, num_trans, NULL);
|
|
}
|
|
|
|
png_write_info(This->png_ptr, This->info_ptr);
|
|
|
|
if (This->format->remove_filler)
|
|
png_set_filler(This->png_ptr, 0, PNG_FILLER_AFTER);
|
|
|
|
if (This->format->swap_rgb)
|
|
png_set_bgr(This->png_ptr);
|
|
|
|
if (encoder_frame->interlace)
|
|
This->passes = png_set_interlace_handling(This->png_ptr);
|
|
|
|
if (encoder_frame->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,
|
|
};
|
|
|
|
png_set_filter(This->png_ptr, 0, png_filter_map[encoder_frame->filter]);
|
|
}
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
static HRESULT CDECL png_encoder_write_lines(struct encoder* encoder, BYTE *data, DWORD line_count, DWORD stride)
|
|
{
|
|
struct png_encoder *This = impl_from_encoder(encoder);
|
|
png_byte **row_pointers=NULL;
|
|
UINT i;
|
|
|
|
if (This->encoder_frame.interlace)
|
|
{
|
|
/* Just store the data so we can write it in multiple passes in Commit. */
|
|
for (i=0; i<line_count; i++)
|
|
memcpy(This->data + This->stride * (This->lines_written + i),
|
|
data + stride * i,
|
|
This->stride);
|
|
|
|
This->lines_written += line_count;
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
/* set up setjmp/longjmp error handling */
|
|
if (setjmp(png_jmpbuf(This->png_ptr)))
|
|
{
|
|
free(row_pointers);
|
|
return E_FAIL;
|
|
}
|
|
|
|
row_pointers = malloc(line_count * sizeof(png_byte*));
|
|
if (!row_pointers)
|
|
return E_OUTOFMEMORY;
|
|
|
|
for (i=0; i<line_count; i++)
|
|
row_pointers[i] = data + stride * i;
|
|
|
|
png_write_rows(This->png_ptr, row_pointers, line_count);
|
|
This->lines_written += line_count;
|
|
|
|
free(row_pointers);
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
static HRESULT CDECL png_encoder_commit_frame(struct encoder *encoder)
|
|
{
|
|
struct png_encoder *This = impl_from_encoder(encoder);
|
|
png_byte **row_pointers=NULL;
|
|
|
|
/* set up setjmp/longjmp error handling */
|
|
if (setjmp(png_jmpbuf(This->png_ptr)))
|
|
{
|
|
free(row_pointers);
|
|
return E_FAIL;
|
|
}
|
|
|
|
if (This->encoder_frame.interlace)
|
|
{
|
|
int i;
|
|
|
|
row_pointers = malloc(This->encoder_frame.height * sizeof(png_byte*));
|
|
if (!row_pointers)
|
|
return E_OUTOFMEMORY;
|
|
|
|
for (i=0; i<This->encoder_frame.height; i++)
|
|
row_pointers[i] = This->data + This->stride * i;
|
|
|
|
for (i=0; i<This->passes; i++)
|
|
png_write_rows(This->png_ptr, row_pointers, This->encoder_frame.height);
|
|
}
|
|
|
|
png_write_end(This->png_ptr, This->info_ptr);
|
|
|
|
free(row_pointers);
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
static HRESULT CDECL png_encoder_commit_file(struct encoder *encoder)
|
|
{
|
|
return S_OK;
|
|
}
|
|
|
|
static void CDECL png_encoder_destroy(struct encoder *encoder)
|
|
{
|
|
struct png_encoder *This = impl_from_encoder(encoder);
|
|
if (This->png_ptr)
|
|
png_destroy_write_struct(&This->png_ptr, &This->info_ptr);
|
|
free(This->data);
|
|
RtlFreeHeap(GetProcessHeap(), 0, This);
|
|
}
|
|
|
|
static const struct encoder_funcs png_encoder_vtable = {
|
|
png_encoder_initialize,
|
|
png_encoder_get_supported_format,
|
|
png_encoder_create_frame,
|
|
png_encoder_write_lines,
|
|
png_encoder_commit_frame,
|
|
png_encoder_commit_file,
|
|
png_encoder_destroy
|
|
};
|
|
|
|
HRESULT CDECL png_encoder_create(struct encoder_info *info, struct encoder **result)
|
|
{
|
|
struct png_encoder *This;
|
|
|
|
This = RtlAllocateHeap(GetProcessHeap(), 0, sizeof(*This));
|
|
|
|
if (!This)
|
|
{
|
|
return E_OUTOFMEMORY;
|
|
}
|
|
|
|
This->encoder.vtable = &png_encoder_vtable;
|
|
This->png_ptr = NULL;
|
|
This->info_ptr = NULL;
|
|
This->data = NULL;
|
|
*result = &This->encoder;
|
|
|
|
info->flags = ENCODER_FLAGS_SUPPORTS_METADATA;
|
|
info->container_format = GUID_ContainerFormatPng;
|
|
info->clsid = CLSID_WICPngEncoder;
|
|
info->encoder_options[0] = ENCODER_OPTION_INTERLACE;
|
|
info->encoder_options[1] = ENCODER_OPTION_FILTER;
|
|
info->encoder_options[2] = ENCODER_OPTION_END;
|
|
|
|
return S_OK;
|
|
}
|