mirror of
git://source.winehq.org/git/wine.git
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214 lines
5.9 KiB
C
214 lines
5.9 KiB
C
/*
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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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HRESULT CDECL decoder_initialize(struct decoder *decoder, IStream *stream, struct decoder_stat *st)
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{
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return decoder->vtable->initialize(decoder, stream, st);
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}
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HRESULT CDECL decoder_get_frame_info(struct decoder *decoder, UINT frame, struct decoder_frame *info)
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{
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return decoder->vtable->get_frame_info(decoder, frame, info);
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}
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HRESULT CDECL decoder_copy_pixels(struct decoder *decoder, UINT frame,
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const WICRect *prc, UINT stride, UINT buffersize, BYTE *buffer)
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{
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return decoder->vtable->copy_pixels(decoder, frame, prc, stride, buffersize, buffer);
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}
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HRESULT CDECL decoder_get_metadata_blocks(struct decoder *decoder, UINT frame, UINT *count, struct decoder_block **blocks)
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{
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return decoder->vtable->get_metadata_blocks(decoder, frame, count, blocks);
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}
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HRESULT CDECL decoder_get_color_context(struct decoder *decoder, UINT frame,
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UINT num, BYTE **data, DWORD *datasize)
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{
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return decoder->vtable->get_color_context(decoder, frame, num, data, datasize);
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}
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void CDECL decoder_destroy(struct decoder *decoder)
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{
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decoder->vtable->destroy(decoder);
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}
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HRESULT CDECL encoder_initialize(struct encoder *encoder, IStream *stream)
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{
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return encoder->vtable->initialize(encoder, stream);
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}
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HRESULT CDECL encoder_get_supported_format(struct encoder* encoder, GUID *pixel_format, DWORD *bpp, BOOL *indexed)
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{
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return encoder->vtable->get_supported_format(encoder, pixel_format, bpp, indexed);
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}
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HRESULT CDECL encoder_create_frame(struct encoder* encoder, const struct encoder_frame *frame)
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{
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return encoder->vtable->create_frame(encoder, frame);
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}
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HRESULT CDECL encoder_write_lines(struct encoder* encoder, BYTE *data, DWORD line_count, DWORD stride)
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{
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return encoder->vtable->write_lines(encoder, data, line_count, stride);
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}
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HRESULT CDECL encoder_commit_frame(struct encoder* encoder)
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{
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return encoder->vtable->commit_frame(encoder);
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}
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HRESULT CDECL encoder_commit_file(struct encoder* encoder)
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{
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return encoder->vtable->commit_file(encoder);
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}
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void CDECL encoder_destroy(struct encoder *encoder)
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{
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encoder->vtable->destroy(encoder);
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}
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HRESULT copy_pixels(UINT bpp, const BYTE *srcbuffer,
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UINT srcwidth, UINT srcheight, INT srcstride,
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const WICRect *rc, UINT dststride, UINT dstbuffersize, BYTE *dstbuffer)
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{
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UINT bytesperrow;
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UINT row_offset; /* number of bits into the source rows where the data starts */
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WICRect rect;
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if (!rc)
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{
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rect.X = 0;
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rect.Y = 0;
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rect.Width = srcwidth;
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rect.Height = srcheight;
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rc = ▭
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}
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else
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{
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if (rc->X < 0 || rc->Y < 0 || rc->X+rc->Width > srcwidth || rc->Y+rc->Height > srcheight)
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return E_INVALIDARG;
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}
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bytesperrow = ((bpp * rc->Width)+7)/8;
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if (dststride < bytesperrow)
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return E_INVALIDARG;
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if ((dststride * (rc->Height-1)) + bytesperrow > dstbuffersize)
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return E_INVALIDARG;
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/* if the whole bitmap is copied and the buffer format matches then it's a matter of a single memcpy */
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if (rc->X == 0 && rc->Y == 0 && rc->Width == srcwidth && rc->Height == srcheight &&
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srcstride == dststride && srcstride == bytesperrow)
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{
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memcpy(dstbuffer, srcbuffer, srcstride * srcheight);
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return S_OK;
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}
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row_offset = rc->X * bpp;
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if (row_offset % 8 == 0)
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{
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/* everything lines up on a byte boundary */
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INT row;
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const BYTE *src;
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BYTE *dst;
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src = srcbuffer + (row_offset / 8) + srcstride * rc->Y;
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dst = dstbuffer;
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for (row=0; row < rc->Height; row++)
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{
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memcpy(dst, src, bytesperrow);
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src += srcstride;
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dst += dststride;
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}
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return S_OK;
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}
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else
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{
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/* we have to do a weird bitwise copy. eww. */
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FIXME("cannot reliably copy bitmap data if bpp < 8\n");
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return E_FAIL;
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}
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}
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static inline ULONG read_ulong_be(BYTE* data)
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{
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return data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
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}
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HRESULT read_png_chunk(IStream *stream, BYTE *type, BYTE **data, ULONG *data_size)
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{
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BYTE header[8];
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HRESULT hr;
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ULONG bytesread;
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hr = stream_read(stream, header, 8, &bytesread);
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if (FAILED(hr) || bytesread < 8)
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{
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if (SUCCEEDED(hr))
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hr = E_FAIL;
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return hr;
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}
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*data_size = read_ulong_be(&header[0]);
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memcpy(type, &header[4], 4);
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if (data)
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{
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*data = malloc(*data_size);
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if (!*data)
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return E_OUTOFMEMORY;
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hr = stream_read(stream, *data, *data_size, &bytesread);
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if (FAILED(hr) || bytesread < *data_size)
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{
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if (SUCCEEDED(hr))
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hr = E_FAIL;
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free(*data);
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*data = NULL;
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return hr;
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}
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/* Windows ignores CRC of the chunk */
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}
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return S_OK;
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}
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void reverse_bgr8(UINT bytesperpixel, LPBYTE bits, UINT width, UINT height, INT stride)
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{
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UINT x, y;
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BYTE *pixel, temp;
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for (y=0; y<height; y++)
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{
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pixel = bits + stride * y;
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for (x=0; x<width; x++)
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{
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temp = pixel[2];
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pixel[2] = pixel[0];
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pixel[0] = temp;
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pixel += bytesperpixel;
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}
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}
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}
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