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windowscodecs: Implement JpegEncoder_Frame_WritePixels.

This commit is contained in:
Vincent Povirk 2012-04-11 16:37:56 -05:00 committed by Alexandre Julliard
parent 29b0c79e24
commit 20521a5bb7
1 changed files with 107 additions and 2 deletions
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109
dlls/windowscodecs/jpegformat.c
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@ -69,8 +69,11 @@ MAKE_FUNCPTR(jpeg_destroy_decompress);
MAKE_FUNCPTR(jpeg_read_header);
MAKE_FUNCPTR(jpeg_read_scanlines);
MAKE_FUNCPTR(jpeg_resync_to_restart);
MAKE_FUNCPTR(jpeg_set_defaults);
MAKE_FUNCPTR(jpeg_start_compress);
MAKE_FUNCPTR(jpeg_start_decompress);
MAKE_FUNCPTR(jpeg_std_error);
MAKE_FUNCPTR(jpeg_write_scanlines);
#undef MAKE_FUNCPTR
static void *load_libjpeg(void)
@ -90,8 +93,11 @@ static void *load_libjpeg(void)
LOAD_FUNCPTR(jpeg_read_header);
LOAD_FUNCPTR(jpeg_read_scanlines);
LOAD_FUNCPTR(jpeg_resync_to_restart);
LOAD_FUNCPTR(jpeg_set_defaults);
LOAD_FUNCPTR(jpeg_start_compress);
LOAD_FUNCPTR(jpeg_start_decompress);
LOAD_FUNCPTR(jpeg_std_error);
LOAD_FUNCPTR(jpeg_write_scanlines);
#undef LOAD_FUNCPTR
}
return libjpeg_handle;
@ -727,6 +733,7 @@ typedef struct JpegEncoder {
int frame_count;
int frame_initialized;
int started_compress;
int lines_written;
UINT width, height;
double xres, yres;
const jpeg_compress_format *format;
@ -949,8 +956,105 @@ static HRESULT WINAPI JpegEncoder_Frame_SetThumbnail(IWICBitmapFrameEncode *ifac
static HRESULT WINAPI JpegEncoder_Frame_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;
JpegEncoder *This = impl_from_IWICBitmapFrameEncode(iface);
jmp_buf jmpbuf;
BYTE *swapped_data = NULL, *current_row;
int line, row_size;
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, swapped_data);
return E_FAIL;
}
This->cinfo.client_data = &jmpbuf;
if (!This->started_compress)
{
This->cinfo.image_width = This->width;
This->cinfo.image_height = This->height;
This->cinfo.input_components = This->format->num_components;
This->cinfo.in_color_space = This->format->color_space;
pjpeg_set_defaults(&This->cinfo);
if (This->xres != 0.0 && This->yres != 0.0)
{
This->cinfo.density_unit = 1; /* dots per inch */
This->cinfo.X_density = This->xres;
This->cinfo.Y_density = This->yres;
}
pjpeg_start_compress(&This->cinfo, TRUE);
This->started_compress = 1;
}
row_size = This->format->bpp / 8 * This->width;
if (This->format->swap_rgb)
{
swapped_data = HeapAlloc(GetProcessHeap(), 0, row_size);
if (!swapped_data)
{
LeaveCriticalSection(&This->lock);
return E_OUTOFMEMORY;
}
}
for (line=0; line < lineCount; line++)
{
if (This->format->swap_rgb)
{
int x;
memcpy(swapped_data, pbPixels + (cbStride * line), row_size);
for (x=0; x < This->width; x++)
{
BYTE b;
b = swapped_data[x*3];
swapped_data[x*3] = swapped_data[x*3+2];
swapped_data[x*3+2] = b;
}
current_row = swapped_data;
}
else
current_row = pbPixels + (cbStride * line);
if (!pjpeg_write_scanlines(&This->cinfo, &current_row, 1))
{
ERR("failed writing scanlines\n");
LeaveCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, swapped_data);
return E_FAIL;
}
This->lines_written++;
}
LeaveCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, swapped_data);
return S_OK;
}
static HRESULT WINAPI JpegEncoder_Frame_WriteSource(IWICBitmapFrameEncode *iface,
@ -1228,6 +1332,7 @@ HRESULT JpegEncoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
This->frame_count = 0;
This->frame_initialized = 0;
This->started_compress = 0;
This->lines_written = 0;
This->width = This->height = 0;
This->xres = This->yres = 0.0;
This->format = NULL;