static HRESULT WINAPI PngFrameEncode_WritePixels(IWICBitmapFrameEncode *iface,
UINT lineCount, UINT cbStride, UINT cbBufferSize, BYTE *pbPixels)
{
PngEncoder *This = encoder_from_frame(iface);
png_byte **row_pointers=NULL;
UINT i;
jmp_buf jmpbuf;
TRACE("(%p,%u,%u,%u,%p)\n", iface, lineCount, cbStride, cbBufferSize, pbPixels);
if (!This->frame_initialized || !This->width || !This->height || !This->format)
return WINCODEC_ERR_WRONGSTATE;
if (lineCount == 0 || lineCount + This->lines_written > This->height)
return E_INVALIDARG;
/* set up setjmp/longjmp error handling */
if (setjmp(jmpbuf))
{
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)
{
ppng_set_IHDR(This->png_ptr, This->info_ptr, This->width, This->height,
This->format->bit_depth, This->format->color_type, 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);
}
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);
This->info_written = TRUE;
}
row_pointers = HeapAlloc(GetProcessHeap(), 0, lineCount * sizeof(png_byte*));
if (!row_pointers)
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;
HeapFree(GetProcessHeap(), 0, row_pointers);
return S_OK;
}
static HRESULT WINAPI PngFrameEncode_Commit(IWICBitmapFrameEncode *iface)
{
PngEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
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);
return E_FAIL;
}
ppng_set_error_fn(This->png_ptr, jmpbuf, user_error_fn, user_warning_fn);
ppng_write_end(This->png_ptr, This->info_ptr);
This->frame_committed = TRUE;
LeaveCriticalSection(&This->lock);
return S_OK;
}
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 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 PngDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
PngDecoder *This = (PngDecoder*)iface;
LARGE_INTEGER seek;
HRESULT hr;
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);
/* initialize libpng */
This->png_ptr = ppng_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!This->png_ptr) return E_FAIL;
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;
return E_FAIL;
}
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;
return E_FAIL;
}
/* 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;
return E_FAIL;
}
ppng_set_error_fn(This->png_ptr, &jmpbuf, user_error_fn, user_warning_fn);
/* seek to the start of the stream */
seek.QuadPart = 0;
hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) return hr;
/* 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)
{
#if 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);
return E_FAIL;
}
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);
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);
return E_FAIL;
}
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);
return E_FAIL;
}
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);
return E_FAIL;
}
break;
default:
ERR("invalid color type %i\n", color_type);
return E_FAIL;
}
/* 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) return E_OUTOFMEMORY;
row_pointers = HeapAlloc(GetProcessHeap(), 0, sizeof(png_bytep)*This->height);
if (!row_pointers) return E_OUTOFMEMORY;
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;
return S_OK;
}
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);
}
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);
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;
}
