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windowscodecs: Implement BitmapScaler_CopyPixels.

oldstable
Vincent Povirk 2012-06-13 12:56:10 -05:00 committed by Alexandre Julliard
parent 22383aa642
commit e7f31ddb81
3 changed files with 199 additions and 6 deletions
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25
dlls/windowscodecs/main.c
View File

@ -17,6 +17,7 @@
*/
#define COBJMACROS
#include "config.h"
#include <stdarg.h>
@ -136,3 +137,27 @@ void reverse_bgr8(UINT bytesperpixel, LPBYTE bits, UINT width, UINT height, INT
}
}
}
HRESULT get_pixelformat_bpp(const GUID *pixelformat, UINT *bpp)
{
HRESULT hr;
IWICComponentInfo *info;
IWICPixelFormatInfo *formatinfo;
hr = CreateComponentInfo(pixelformat, &info);
if (SUCCEEDED(hr))
{
hr = IWICComponentInfo_QueryInterface(info, &IID_IWICPixelFormatInfo, (void**)&formatinfo);
if (SUCCEEDED(hr))
{
hr = IWICPixelFormatInfo_GetBitsPerPixel(formatinfo, bpp);
IWICPixelFormatInfo_Release(formatinfo);
}
IWICComponentInfo_Release(info);
}
return hr;
}

178
dlls/windowscodecs/scaler.c
View File

@ -38,7 +38,11 @@ typedef struct BitmapScaler {
LONG ref;
IWICBitmapSource *source;
UINT width, height;
UINT src_width, src_height;
WICBitmapInterpolationMode mode;
UINT bpp;
void (*fn_get_required_source_rect)(struct BitmapScaler*,UINT,UINT,WICRect*);
void (*fn_copy_scanline)(struct BitmapScaler*,UINT,UINT,UINT,BYTE**,UINT,UINT,BYTE*);
CRITICAL_SECTION lock; /* must be held when initialized */
} BitmapScaler;
@ -162,12 +166,138 @@ static HRESULT WINAPI BitmapScaler_CopyPalette(IWICBitmapScaler *iface,
return IWICBitmapSource_CopyPalette(This->source, pIPalette);
}
static void NearestNeighbor_GetRequiredSourceRect(BitmapScaler *This,
UINT x, UINT y, WICRect *src_rect)
{
src_rect->X = x * This->src_width / This->width;
src_rect->Y = y * This->src_height / This->height;
src_rect->Width = src_rect->Height = 1;
}
static void NearestNeighbor_CopyScanline(BitmapScaler *This,
UINT dst_x, UINT dst_y, UINT dst_width,
BYTE **src_data, UINT src_data_x, UINT src_data_y, BYTE *pbBuffer)
{
int i;
UINT bytesperpixel = This->bpp/8;
UINT src_x, src_y;
src_y = dst_y * This->src_height / This->height - src_data_y;
for (i=0; i<dst_width; i++)
{
src_x = (dst_x + i) * This->src_width / This->width - src_data_x;
memcpy(pbBuffer + bytesperpixel * i, src_data[src_y] + bytesperpixel * src_x, bytesperpixel);
}
}
static HRESULT WINAPI BitmapScaler_CopyPixels(IWICBitmapScaler *iface,
const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
{
FIXME("(%p,%p,%u,%u,%p): stub\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
HRESULT hr;
WICRect dest_rect;
WICRect src_rect_ul, src_rect_br, src_rect;
BYTE **src_rows;
BYTE *src_bits;
ULONG bytesperrow;
ULONG src_bytesperrow;
ULONG buffer_size;
UINT y;
return E_NOTIMPL;
TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
EnterCriticalSection(&This->lock);
if (!This->source)
{
hr = WINCODEC_ERR_WRONGSTATE;
goto end;
}
if (prc)
dest_rect = *prc;
else
{
dest_rect.X = dest_rect.Y = 0;
dest_rect.Width = This->width;
dest_rect.Height = This->height;
}
if (dest_rect.X < 0 || dest_rect.Y < 0 ||
dest_rect.X+dest_rect.Width > This->width|| dest_rect.Y+dest_rect.Height > This->height)
{
hr = E_INVALIDARG;
goto end;
}
bytesperrow = ((This->bpp * dest_rect.Width)+7)/8;
if (cbStride < bytesperrow)
{
hr = E_INVALIDARG;
goto end;
}
if ((cbStride * dest_rect.Height) > cbBufferSize)
{
hr = E_INVALIDARG;
goto end;
}
/* MSDN recommends calling CopyPixels once for each scanline from top to
* bottom, and claims codecs optimize for this. Ideally, when called in this
* way, we should avoid requesting a scanline from the source more than
* once, by saving the data that will be useful for the next scanline after
* the call returns. The GetRequiredSourceRect/CopyScanline functions are
* designed to make it possible to do this in a generic way, but for now we
* just grab all the data we need in each call. */
This->fn_get_required_source_rect(This, dest_rect.X, dest_rect.Y, &src_rect_ul);
This->fn_get_required_source_rect(This, dest_rect.X+dest_rect.Width-1,
dest_rect.Y+dest_rect.Height-1, &src_rect_br);
src_rect.X = src_rect_ul.X;
src_rect.Y = src_rect_ul.Y;
src_rect.Width = src_rect_br.Width + src_rect_br.X - src_rect_ul.X;
src_rect.Height = src_rect_br.Height + src_rect_br.Y - src_rect_ul.Y;
src_bytesperrow = (src_rect.Width * This->bpp + 7)/8;
buffer_size = src_bytesperrow * src_rect.Height;
src_rows = HeapAlloc(GetProcessHeap(), 0, sizeof(BYTE*) * src_rect.Height);
src_bits = HeapAlloc(GetProcessHeap(), 0, buffer_size);
if (!src_rows || !src_bits)
{
HeapFree(GetProcessHeap(), 0, src_rows);
HeapFree(GetProcessHeap(), 0, src_bits);
hr = E_OUTOFMEMORY;
goto end;
}
for (y=0; y<src_rect.Height; y++)
src_rows[y] = src_bits + y * src_bytesperrow;
hr = IWICBitmapSource_CopyPixels(This->source, &src_rect, src_bytesperrow,
buffer_size, src_bits);
if (SUCCEEDED(hr))
{
for (y=0; y < dest_rect.Height; y++)
{
This->fn_copy_scanline(This, dest_rect.X, dest_rect.Y+y, dest_rect.Width,
src_rows, src_rect.X, src_rect.Y, pbBuffer + cbStride * y);
}
}
HeapFree(GetProcessHeap(), 0, src_rows);
HeapFree(GetProcessHeap(), 0, src_bits);
end:
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI BitmapScaler_Initialize(IWICBitmapScaler *iface,
@ -175,7 +305,8 @@ static HRESULT WINAPI BitmapScaler_Initialize(IWICBitmapScaler *iface,
WICBitmapInterpolationMode mode)
{
BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
HRESULT hr=S_OK;
HRESULT hr;
GUID src_pixelformat;
TRACE("(%p,%p,%u,%u,%u)\n", iface, pISource, uiWidth, uiHeight, mode);
@ -187,13 +318,45 @@ static HRESULT WINAPI BitmapScaler_Initialize(IWICBitmapScaler *iface,
goto end;
}
IWICBitmapSource_AddRef(pISource);
This->source = pISource;
This->width = uiWidth;
This->height = uiHeight;
This->mode = mode;
hr = IWICBitmapSource_GetSize(pISource, &This->src_width, &This->src_height);
if (SUCCEEDED(hr))
hr = IWICBitmapSource_GetPixelFormat(pISource, &src_pixelformat);
if (SUCCEEDED(hr))
{
hr = get_pixelformat_bpp(&src_pixelformat, &This->bpp);
}
if (SUCCEEDED(hr))
{
switch (mode)
{
default:
FIXME("unsupported mode %i\n", mode);
/* fall-through */
case WICBitmapInterpolationModeNearestNeighbor:
if ((This->bpp % 8) == 0)
{
IWICBitmapSource_AddRef(pISource);
This->source = pISource;
}
else
{
hr = WICConvertBitmapSource(&GUID_WICPixelFormat32bppBGRA,
pISource, &This->source);
This->bpp = 32;
}
This->fn_get_required_source_rect = NearestNeighbor_GetRequiredSourceRect;
This->fn_copy_scanline = NearestNeighbor_CopyScanline;
break;
}
}
end:
LeaveCriticalSection(&This->lock);
@ -224,7 +387,10 @@ HRESULT BitmapScaler_Create(IWICBitmapScaler **scaler)
This->source = NULL;
This->width = 0;
This->height = 0;
This->src_width = 0;
This->src_height = 0;
This->mode = 0;
This->bpp = 0;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": BitmapScaler.lock");

2
dlls/windowscodecs/wincodecs_private.h
View File

@ -55,6 +55,8 @@ extern HRESULT copy_pixels(UINT bpp, const BYTE *srcbuffer,
extern void reverse_bgr8(UINT bytesperpixel, LPBYTE bits, UINT width, UINT height, INT stride) DECLSPEC_HIDDEN;
extern HRESULT get_pixelformat_bpp(const GUID *pixelformat, UINT *bpp) DECLSPEC_HIDDEN;
extern HRESULT CreatePropertyBag2(IPropertyBag2 **ppPropertyBag2) DECLSPEC_HIDDEN;
extern HRESULT CreateComponentInfo(REFCLSID clsid, IWICComponentInfo **ppIInfo) DECLSPEC_HIDDEN;