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 HRESULT WINAPI JpegDecoder_GetFrame(IWICBitmapDecoder *iface,
UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
{
JpegDecoder *This = impl_from_IWICBitmapDecoder(iface);
TRACE("(%p,%u,%p)\n", iface, index, ppIBitmapFrame);
if (!This->initialized) return WINCODEC_ERR_NOTINITIALIZED;
if (index != 0) return E_INVALIDARG;
IWICBitmapDecoder_AddRef(iface);
*ppIBitmapFrame = &This->IWICBitmapFrameDecode_iface;
return S_OK;
}
static ULONG WINAPI PngDecoder_Release(IWICBitmapDecoder *iface)
{
PngDecoder *This = impl_from_IWICBitmapDecoder(iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
if (This->png_ptr)
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, &This->end_info);
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, This->image_bits);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static ULONG WINAPI JpegDecoder_Release(IWICBitmapDecoder *iface)
{
JpegDecoder *This = impl_from_IWICBitmapDecoder(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->cinfo_initialized) pjpeg_destroy_decompress(&This->cinfo);
if (This->stream) IStream_Release(This->stream);
HeapFree(GetProcessHeap(), 0, This->image_data);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
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 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;
jmp_buf jmpbuf;
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->info_ptr)
{
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 = E_FAIL;
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 (transparency && color_type != PNG_COLOR_TYPE_PALETTE)
{
/* expand to RGBA */
if (color_type == PNG_COLOR_TYPE_GRAY)
{
if (bit_depth < 8)
{
#ifdef HAVE_PNG_SET_EXPAND_GRAY_1_2_4_TO_8
ppng_set_expand_gray_1_2_4_to_8(This->png_ptr);
#else
ppng_set_gray_1_2_4_to_8(This->png_ptr);
#endif
bit_depth = 8;
}
ppng_set_gray_to_rgb(This->png_ptr);
}
ppng_set_tRNS_to_alpha(This->png_ptr);
color_type = PNG_COLOR_TYPE_RGB_ALPHA;
}
switch (color_type)
{
case PNG_COLOR_TYPE_GRAY:
This->bpp = bit_depth;
switch (bit_depth)
{
case 1: This->format = &GUID_WICPixelFormatBlackWhite; break;
case 2: This->format = &GUID_WICPixelFormat2bppGray; break;
case 4: This->format = &GUID_WICPixelFormat4bppGray; break;
case 8: This->format = &GUID_WICPixelFormat8bppGray; break;
case 16: This->format = &GUID_WICPixelFormat16bppGray; break;
default:
ERR("invalid grayscale bit depth: %i\n", bit_depth);
hr = E_FAIL;
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;
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);
This->initialized = TRUE;
end:
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI JpegDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
JpegDecoder *This = impl_from_IWICBitmapDecoder(iface);
int ret;
LARGE_INTEGER seek;
jmp_buf jmpbuf;
TRACE("(%p,%p,%u)\n", iface, pIStream, cacheOptions);
EnterCriticalSection(&This->lock);
if (This->cinfo_initialized)
{
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_WRONGSTATE;
}
pjpeg_std_error(&This->jerr);
This->jerr.error_exit = error_exit_fn;
This->jerr.emit_message = emit_message_fn;
This->cinfo.err = &This->jerr;
This->cinfo.client_data = &jmpbuf;
if (setjmp(jmpbuf))
{
LeaveCriticalSection(&This->lock);
return E_FAIL;
}
pjpeg_CreateDecompress(&This->cinfo, JPEG_LIB_VERSION, sizeof(struct jpeg_decompress_struct));
This->cinfo_initialized = TRUE;
This->stream = pIStream;
IStream_AddRef(pIStream);
seek.QuadPart = 0;
IStream_Seek(This->stream, seek, STREAM_SEEK_SET, NULL);
This->source_mgr.bytes_in_buffer = 0;
This->source_mgr.init_source = source_mgr_init_source;
This->source_mgr.fill_input_buffer = source_mgr_fill_input_buffer;
This->source_mgr.skip_input_data = source_mgr_skip_input_data;
This->source_mgr.resync_to_restart = pjpeg_resync_to_restart;
This->source_mgr.term_source = source_mgr_term_source;
This->cinfo.src = &This->source_mgr;
ret = pjpeg_read_header(&This->cinfo, TRUE);
if (ret != JPEG_HEADER_OK) {
WARN("Jpeg image in stream has bad format, read header returned %d.\n",ret);
LeaveCriticalSection(&This->lock);
return E_FAIL;
}
switch (This->cinfo.jpeg_color_space)
{
case JCS_GRAYSCALE:
This->cinfo.out_color_space = JCS_GRAYSCALE;
break;
case JCS_RGB:
case JCS_YCbCr:
This->cinfo.out_color_space = JCS_RGB;
break;
case JCS_CMYK:
case JCS_YCCK:
This->cinfo.out_color_space = JCS_CMYK;
break;
default:
ERR("Unknown JPEG color space %i\n", This->cinfo.jpeg_color_space);
LeaveCriticalSection(&This->lock);
return E_FAIL;
}
if (!pjpeg_start_decompress(&This->cinfo))
{
ERR("jpeg_start_decompress failed\n");
LeaveCriticalSection(&This->lock);
return E_FAIL;
}
This->initialized = TRUE;
LeaveCriticalSection(&This->lock);
return S_OK;
}
