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windowscodecs: Implement WritePixels for the PNG encoder.

This commit is contained in:
Vincent Povirk 2009-09-23 17:15:36 -05:00 committed by Alexandre Julliard
parent 6bc71039b1
commit 2e14644937
1 changed files with 66 additions and 2 deletions
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68
dlls/windowscodecs/pngformat.c
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@ -58,8 +58,11 @@ MAKE_FUNCPTR(png_get_pHYs);
MAKE_FUNCPTR(png_get_PLTE);
MAKE_FUNCPTR(png_get_tRNS);
MAKE_FUNCPTR(png_set_bgr);
MAKE_FUNCPTR(png_set_filler);
MAKE_FUNCPTR(png_set_gray_1_2_4_to_8);
MAKE_FUNCPTR(png_set_gray_to_rgb);
MAKE_FUNCPTR(png_set_IHDR);
MAKE_FUNCPTR(png_set_pHYs);
MAKE_FUNCPTR(png_set_read_fn);
MAKE_FUNCPTR(png_set_strip_16);
MAKE_FUNCPTR(png_set_tRNS_to_alpha);
@ -67,6 +70,8 @@ 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_info);
MAKE_FUNCPTR(png_write_rows);
#undef MAKE_FUNCPTR
static void *load_libpng(void)
@ -93,8 +98,11 @@ static void *load_libpng(void)
LOAD_FUNCPTR(png_get_PLTE);
LOAD_FUNCPTR(png_get_tRNS);
LOAD_FUNCPTR(png_set_bgr);
LOAD_FUNCPTR(png_set_filler);
LOAD_FUNCPTR(png_set_gray_1_2_4_to_8);
LOAD_FUNCPTR(png_set_gray_to_rgb);
LOAD_FUNCPTR(png_set_IHDR);
LOAD_FUNCPTR(png_set_pHYs);
LOAD_FUNCPTR(png_set_read_fn);
LOAD_FUNCPTR(png_set_strip_16);
LOAD_FUNCPTR(png_set_tRNS_to_alpha);
@ -102,6 +110,8 @@ static void *load_libpng(void)
LOAD_FUNCPTR(png_read_end);
LOAD_FUNCPTR(png_read_image);
LOAD_FUNCPTR(png_read_info);
LOAD_FUNCPTR(png_write_info);
LOAD_FUNCPTR(png_write_rows);
#undef LOAD_FUNCPTR
}
@ -701,6 +711,7 @@ typedef struct PngEncoder {
BOOL info_written;
UINT width, height;
double xres, yres;
UINT lines_written;
} PngEncoder;
static inline PngEncoder *encoder_from_frame(IWICBitmapFrameEncode *iface)
@ -831,8 +842,60 @@ static HRESULT WINAPI PngFrameEncode_SetThumbnail(IWICBitmapFrameEncode *iface,
static HRESULT WINAPI PngFrameEncode_WritePixels(IWICBitmapFrameEncode *iface,
UINT lineCount, UINT cbStride, UINT cbBufferSize, BYTE *pbPixels)
{
FIXME("(%p,%u,%u,%u,%p): stub\n", iface, lineCount, cbStride, cbBufferSize, pbPixels);
return E_NOTIMPL;
PngEncoder *This = encoder_from_frame(iface);
png_byte **row_pointers=NULL;
UINT i;
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(png_jmpbuf(This->png_ptr)))
{
if (row_pointers) HeapFree(GetProcessHeap(), 0, row_pointers);
return E_FAIL;
}
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_WriteSource(IWICBitmapFrameEncode *iface,
@ -1109,6 +1172,7 @@ HRESULT PngEncoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
This->height = 0;
This->xres = 0.0;
This->yres = 0.0;
This->lines_written = 0;
ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
IUnknown_Release((IUnknown*)This);