windowscodecs: Add stub PNG decoder.

dlls/windowscodecs/Makefile.in

@@ -5,6 +5,7 @@ VPATH     = @srcdir@
 MODULE    = windowscodecs.dll
 IMPORTLIB = windowscodecs
 IMPORTS   = uuid ole32 advapi32 kernel32
+EXTRAINCL = @PNGINCL@
 
 C_SRCS = \
 	bmpdecode.c \
@@ -18,6 +19,7 @@ C_SRCS = \
 	jpegformat.c \
 	main.c \
 	palette.c \
+	pngformat.c \
 	propertybag.c \
 	regsvr.c \
 	stream.c \

dlls/windowscodecs/clsfactory.c

@@ -44,6 +44,7 @@ typedef struct {
 static classinfo wic_classes[] = {
     {&CLSID_WICImagingFactory, ImagingFactory_CreateInstance},
     {&CLSID_WICBmpDecoder, BmpDecoder_CreateInstance},
+    {&CLSID_WICPngDecoder, PngDecoder_CreateInstance},
     {&CLSID_WICBmpEncoder, BmpEncoder_CreateInstance},
     {&CLSID_WICGifDecoder, GifDecoder_CreateInstance},
     {&CLSID_WICIcoDecoder, IcoDecoder_CreateInstance},

dlls/windowscodecs/pngformat.c

+/*
+ * Copyright 2009 Vincent Povirk 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 "config.h"
+#include "wine/port.h"
+
+#include <stdarg.h>
+
+#ifdef HAVE_PNG_H
+#include <png.h>
+#endif
+
+#define COBJMACROS
+
+#include "windef.h"
+#include "winbase.h"
+#include "objbase.h"
+#include "wincodec.h"
+
+#include "wincodecs_private.h"
+
+#include "wine/debug.h"
+#include "wine/library.h"
+
+WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
+
+#ifdef SONAME_LIBPNG
+
+static void *libpng_handle;
+#define MAKE_FUNCPTR(f) static typeof(f) * p##f
+MAKE_FUNCPTR(png_create_read_struct);
+MAKE_FUNCPTR(png_create_info_struct);
+#undef MAKE_FUNCPTR
+
+static void *load_libpng(void)
+{
+    if((libpng_handle = wine_dlopen(SONAME_LIBPNG, RTLD_NOW, NULL, 0)) != NULL) {
+
+#define LOAD_FUNCPTR(f) \
+    if((p##f = wine_dlsym(libpng_handle, #f, NULL, 0)) == NULL) { \
+        libpng_handle = NULL; \
+        return NULL; \
+    }
+        LOAD_FUNCPTR(png_create_read_struct);
+        LOAD_FUNCPTR(png_create_info_struct);
+
+#undef LOAD_FUNCPTR
+    }
+    return libpng_handle;
+}
+
+typedef struct {
+    const IWICBitmapDecoderVtbl *lpVtbl;
+    LONG ref;
+} PngDecoder;
+
+static HRESULT WINAPI PngDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
+    void **ppv)
+{
+    PngDecoder *This = (PngDecoder*)iface;
+    TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
+
+    if (!ppv) return E_INVALIDARG;
+
+    if (IsEqualIID(&IID_IUnknown, iid) || IsEqualIID(&IID_IWICBitmapDecoder, iid))
+    {
+        *ppv = This;
+    }
+    else
+    {
+        *ppv = NULL;
+        return E_NOINTERFACE;
+    }
+
+    IUnknown_AddRef((IUnknown*)*ppv);
+    return S_OK;
+}
+
+static ULONG WINAPI PngDecoder_AddRef(IWICBitmapDecoder *iface)
+{
+    PngDecoder *This = (PngDecoder*)iface;
+    ULONG ref = InterlockedIncrement(&This->ref);
+
+    TRACE("(%p) refcount=%u\n", iface, ref);
+
+    return ref;
+}
+
+static ULONG WINAPI PngDecoder_Release(IWICBitmapDecoder *iface)
+{
+    PngDecoder *This = (PngDecoder*)iface;
+    ULONG ref = InterlockedDecrement(&This->ref);
+
+    TRACE("(%p) refcount=%u\n", iface, ref);
+
+    if (ref == 0)
+    {
+        HeapFree(GetProcessHeap(), 0, This);
+    }
+
+    return ref;
+}
+
+static HRESULT WINAPI PngDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *pIStream,
+    DWORD *pdwCapability)
+{
+    FIXME("(%p,%p,%p): stub\n", iface, pIStream, pdwCapability);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI PngDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
+    WICDecodeOptions cacheOptions)
+{
+    FIXME("(%p,%p,%x): stub\n", iface, pIStream, cacheOptions);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI PngDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
+    GUID *pguidContainerFormat)
+{
+    FIXME("(%p,%p): stub\n", iface, pguidContainerFormat);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI PngDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
+    IWICBitmapDecoderInfo **ppIDecoderInfo)
+{
+    FIXME("(%p,%p): stub\n", iface, ppIDecoderInfo);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI PngDecoder_CopyPalette(IWICBitmapDecoder *iface,
+    IWICPalette *pIPalette)
+{
+    FIXME("(%p,%p): stub\n", iface, pIPalette);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI PngDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
+    IWICMetadataQueryReader **ppIMetadataQueryReader)
+{
+    FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI PngDecoder_GetPreview(IWICBitmapDecoder *iface,
+    IWICBitmapSource **ppIBitmapSource)
+{
+    FIXME("(%p,%p): stub\n", iface, ppIBitmapSource);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI PngDecoder_GetColorContexts(IWICBitmapDecoder *iface,
+    UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
+{
+    FIXME("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI PngDecoder_GetThumbnail(IWICBitmapDecoder *iface,
+    IWICBitmapSource **ppIThumbnail)
+{
+    TRACE("(%p,%p)\n", iface, ppIThumbnail);
+    return WINCODEC_ERR_CODECNOTHUMBNAIL;
+}
+
+static HRESULT WINAPI PngDecoder_GetFrameCount(IWICBitmapDecoder *iface,
+    UINT *pCount)
+{
+    FIXME("(%p,%p): stub\n", iface, pCount);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI PngDecoder_GetFrame(IWICBitmapDecoder *iface,
+    UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
+{
+    FIXME("(%p,%u,%p): stub\n", iface, index, ppIBitmapFrame);
+    return E_NOTIMPL;
+}
+
+static const IWICBitmapDecoderVtbl PngDecoder_Vtbl = {
+    PngDecoder_QueryInterface,
+    PngDecoder_AddRef,
+    PngDecoder_Release,
+    PngDecoder_QueryCapability,
+    PngDecoder_Initialize,
+    PngDecoder_GetContainerFormat,
+    PngDecoder_GetDecoderInfo,
+    PngDecoder_CopyPalette,
+    PngDecoder_GetMetadataQueryReader,
+    PngDecoder_GetPreview,
+    PngDecoder_GetColorContexts,
+    PngDecoder_GetThumbnail,
+    PngDecoder_GetFrameCount,
+    PngDecoder_GetFrame
+};
+
+HRESULT PngDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
+{
+    PngDecoder *This;
+    HRESULT ret;
+
+    TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
+
+    *ppv = NULL;
+
+    if (pUnkOuter) return CLASS_E_NOAGGREGATION;
+
+    if (!libpng_handle && !load_libpng())
+    {
+        ERR("Failed reading PNG because unable to find %s\n",SONAME_LIBPNG);
+        return E_FAIL;
+    }
+
+    This = HeapAlloc(GetProcessHeap(), 0, sizeof(PngDecoder));
+    if (!This) return E_OUTOFMEMORY;
+
+    This->lpVtbl = &PngDecoder_Vtbl;
+    This->ref = 1;
+
+    ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
+    IUnknown_Release((IUnknown*)This);
+
+    return ret;
+}
+
+#else /* !HAVE_PNG_H */
+
+HRESULT PngDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
+{
+    ERR("Trying to load PNG picture, but PNG supported not compiled in.\n");
+    return E_FAIL;
+}
+
+#endif

dlls/windowscodecs/regsvr.c

@@ -735,6 +735,12 @@ static struct regsvr_coclass const coclass_list[] = {
 	"windowscodecs.dll",
 	"Apartment"
     },
+    {   &CLSID_WICPngDecoder,
+	"WIC PNG Decoder",
+	NULL,
+	"windowscodecs.dll",
+	"Apartment"
+    },
     {   &CLSID_WICBmpEncoder,
 	"WIC BMP Encoder",
 	NULL,

dlls/windowscodecs/wincodecs_private.h

@@ -22,6 +22,7 @@
 extern HRESULT FormatConverter_CreateInstance(IUnknown *pUnkOuter, REFIID riid, void** ppv);
 extern HRESULT ImagingFactory_CreateInstance(IUnknown *pUnkOuter, REFIID riid, void** ppv);
 extern HRESULT BmpDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID riid, void** ppv);
+extern HRESULT PngDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv);
 extern HRESULT BmpEncoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv);
 extern HRESULT GifDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID riid, void** ppv);
 extern HRESULT IcoDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv);