reactos/dll/win32/windowscodecs/clipper.c

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/*
* Copyright 2013 Nikolay Sivov for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "wincodecs_private.h"
typedef struct BitmapClipper {
IWICBitmapClipper IWICBitmapClipper_iface;
LONG ref;
IWICBitmapSource *source;
WICRect rect;
CRITICAL_SECTION lock; /* must be held when initialized */
} BitmapClipper;
static inline BitmapClipper *impl_from_IWICBitmapClipper(IWICBitmapClipper *iface)
{
return CONTAINING_RECORD(iface, BitmapClipper, IWICBitmapClipper_iface);
}
static HRESULT WINAPI BitmapClipper_QueryInterface(IWICBitmapClipper *iface, REFIID iid,
void **ppv)
{
BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) ||
IsEqualIID(&IID_IWICBitmapSource, iid) ||
IsEqualIID(&IID_IWICBitmapClipper, iid))
{
*ppv = &This->IWICBitmapClipper_iface;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI BitmapClipper_AddRef(IWICBitmapClipper *iface)
{
BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI BitmapClipper_Release(IWICBitmapClipper *iface)
{
BitmapClipper *This = impl_from_IWICBitmapClipper(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->source) IWICBitmapSource_Release(This->source);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI BitmapClipper_GetSize(IWICBitmapClipper *iface,
UINT *width, UINT *height)
{
BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
TRACE("(%p,%p,%p)\n", iface, width, height);
if (!width || !height)
return E_INVALIDARG;
if (!This->source)
return WINCODEC_ERR_WRONGSTATE;
*width = This->rect.Width;
*height = This->rect.Height;
return S_OK;
}
static HRESULT WINAPI BitmapClipper_GetPixelFormat(IWICBitmapClipper *iface,
WICPixelFormatGUID *format)
{
BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
TRACE("(%p,%p)\n", iface, format);
if (!format)
return E_INVALIDARG;
if (!This->source)
return WINCODEC_ERR_WRONGSTATE;
return IWICBitmapSource_GetPixelFormat(This->source, format);
}
static HRESULT WINAPI BitmapClipper_GetResolution(IWICBitmapClipper *iface,
double *dpiX, double *dpiY)
{
BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
TRACE("(%p,%p,%p)\n", iface, dpiX, dpiY);
if (!dpiX || !dpiY)
return E_INVALIDARG;
if (!This->source)
return WINCODEC_ERR_WRONGSTATE;
return IWICBitmapSource_GetResolution(This->source, dpiX, dpiY);
}
static HRESULT WINAPI BitmapClipper_CopyPalette(IWICBitmapClipper *iface,
IWICPalette *palette)
{
BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
TRACE("(%p,%p)\n", iface, palette);
if (!palette)
return E_INVALIDARG;
if (!This->source)
return WINCODEC_ERR_WRONGSTATE;
return IWICBitmapSource_CopyPalette(This->source, palette);
}
static HRESULT WINAPI BitmapClipper_CopyPixels(IWICBitmapClipper *iface,
const WICRect *rc, UINT stride, UINT buffer_size, BYTE *buffer)
{
BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
WICRect rect;
TRACE("(%p,%p,%u,%u,%p)\n", iface, rc, stride, buffer_size, buffer);
if (!This->source)
return WINCODEC_ERR_WRONGSTATE;
if (rc)
{
rect = *rc;
/* transform to source coordinates */
rect.X += This->rect.X;
rect.Y += This->rect.Y;
if ((rect.X + rect.Width > This->rect.X + This->rect.Width) ||
(rect.Y + rect.Height > This->rect.Y + This->rect.Height))
return E_INVALIDARG;
rc = ▭
}
else
rc = &This->rect;
return IWICBitmapSource_CopyPixels(This->source, rc, stride, buffer_size, buffer);
}
static HRESULT WINAPI BitmapClipper_Initialize(IWICBitmapClipper *iface,
IWICBitmapSource *source, const WICRect *rc)
{
BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
UINT width, height;
HRESULT hr = S_OK;
TRACE("(%p,%p,%p)\n", iface, source, rc);
EnterCriticalSection(&This->lock);
if (This->source)
{
hr = WINCODEC_ERR_WRONGSTATE;
goto end;
}
hr = IWICBitmapSource_GetSize(source, &width, &height);
if (FAILED(hr)) goto end;
if ((rc->X + rc->Width > width) || (rc->Y + rc->Height > height))
{
hr = E_INVALIDARG;
goto end;
}
This->rect = *rc;
This->source = source;
IWICBitmapSource_AddRef(This->source);
end:
LeaveCriticalSection(&This->lock);
return hr;
}
static const IWICBitmapClipperVtbl BitmapClipper_Vtbl = {
BitmapClipper_QueryInterface,
BitmapClipper_AddRef,
BitmapClipper_Release,
BitmapClipper_GetSize,
BitmapClipper_GetPixelFormat,
BitmapClipper_GetResolution,
BitmapClipper_CopyPalette,
BitmapClipper_CopyPixels,
BitmapClipper_Initialize
};
HRESULT BitmapClipper_Create(IWICBitmapClipper **clipper)
{
BitmapClipper *This;
This = HeapAlloc(GetProcessHeap(), 0, sizeof(BitmapClipper));
if (!This) return E_OUTOFMEMORY;
This->IWICBitmapClipper_iface.lpVtbl = &BitmapClipper_Vtbl;
This->ref = 1;
This->source = NULL;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": BitmapClipper.lock");
*clipper = &This->IWICBitmapClipper_iface;
return S_OK;
}