From cfaeaaa993d55a72e6925236355ef4ce9eca0063 Mon Sep 17 00:00:00 2001
From: Thomas Csovcsity <46087964+thc13@users.noreply.github.com>
Date: Thu, 6 Jan 2022 01:56:45 +0100
Subject: [PATCH] [WINDOWSCODECS] Add converter for WICPixelFormat32bppRGBA
 (#4239)

This fixes CORE-15708 "PdfSam 3.3.5 setup can not decode bmp"
https://jira.reactos.org/browse/CORE-15708

Wine does not have this issue, but it did not have it back when last sync to
WineStaging-4.18 was done. This commit is as near as possible to actual
wine-7.0-rc3 version. This wine code uses reverse_bgr8 instead of own
convert_rgba_to_bgra, but it leads to wrong colors.
---
 dll/win32/windowscodecs/bmpdecode.c         |  1 +
 dll/win32/windowscodecs/converter.c         | 52 +++++++++++++++++----
 dll/win32/windowscodecs/main.c              | 21 +++++++++
 dll/win32/windowscodecs/wincodecs_private.h |  1 +
 4 files changed, 65 insertions(+), 10 deletions(-)

diff --git a/dll/win32/windowscodecs/bmpdecode.c b/dll/win32/windowscodecs/bmpdecode.c
index f5a2589d68a..5ee4ac38ccb 100644
--- a/dll/win32/windowscodecs/bmpdecode.c
+++ b/dll/win32/windowscodecs/bmpdecode.c
@@ -744,6 +744,7 @@ static const struct bitfields_format bitfields_formats[] = {
     {16,0xf800,0x7e0,0x1f,0,&GUID_WICPixelFormat16bppBGR565,BmpFrameDecode_ReadUncompressed},
     {32,0xff0000,0xff00,0xff,0,&GUID_WICPixelFormat32bppBGR,BmpFrameDecode_ReadUncompressed},
     {32,0xff0000,0xff00,0xff,0xff000000,&GUID_WICPixelFormat32bppBGRA,BmpFrameDecode_ReadUncompressed},
+    {32,0xff000000,0xff0000,0xff00,0xff,&GUID_WICPixelFormat32bppRGBA,BmpFrameDecode_ReadUncompressed},
     {32,0xff,0xff00,0xff0000,0,&GUID_WICPixelFormat32bppBGR,BmpFrameDecode_ReadRGB8},
     {0}
 };
diff --git a/dll/win32/windowscodecs/converter.c b/dll/win32/windowscodecs/converter.c
index dcc2f05693f..cac2ac1aa5a 100644
--- a/dll/win32/windowscodecs/converter.c
+++ b/dll/win32/windowscodecs/converter.c
@@ -722,6 +722,15 @@ static HRESULT copypixels_to_32bppBGRA(struct FormatConverter *This, const WICRe
                     pbBuffer[cbStride*y+4*x+3] = 0xff;
         }
         return S_OK;
+    case format_32bppRGBA:
+        if (prc)
+        {
+            HRESULT res;
+            res = IWICBitmapSource_CopyPixels(This->source, prc, cbStride, cbBufferSize, pbBuffer);
+            if (FAILED(res)) return res;
+            convert_rgba_to_bgra(4, pbBuffer, prc->Width, prc->Height, cbStride);
+        }
+        return S_OK;
     case format_32bppBGRA:
         if (prc)
             return IWICBitmapSource_CopyPixels(This->source, prc, cbStride, cbBufferSize, pbBuffer);
@@ -859,6 +868,7 @@ static HRESULT copypixels_to_32bppBGRA(struct FormatConverter *This, const WICRe
         }
         return S_OK;
     default:
+        FIXME("Unimplemented conversion path!\n");
         return WINCODEC_ERR_UNSUPPORTEDOPERATION;
     }
 }
@@ -1038,6 +1048,7 @@ static HRESULT copypixels_to_24bppBGR(struct FormatConverter *This, const WICRec
     case format_32bppBGR:
     case format_32bppBGRA:
     case format_32bppPBGRA:
+    case format_32bppRGBA:
         if (prc)
         {
             HRESULT res;
@@ -1061,17 +1072,38 @@ static HRESULT copypixels_to_24bppBGR(struct FormatConverter *This, const WICRec
             {
                 srcrow = srcdata;
                 dstrow = pbBuffer;
-                for (y=0; y<prc->Height; y++) {
-                    srcpixel=srcrow;
-                    dstpixel=dstrow;
-                    for (x=0; x<prc->Width; x++) {
-                        *dstpixel++=*srcpixel++; /* blue */
-                        *dstpixel++=*srcpixel++; /* green */
-                        *dstpixel++=*srcpixel++; /* red */
-                        srcpixel++; /* alpha */
+
+                if (source_format == format_32bppRGBA)
+                {
+                    for (y = 0; y < prc->Height; y++)
+                    {
+                        srcpixel = srcrow;
+                        dstpixel = dstrow;
+                        for (x = 0; x < prc->Width; x++) {
+                            *dstpixel++ = srcpixel[2]; /* blue */
+                            *dstpixel++ = srcpixel[1]; /* green */
+                            *dstpixel++ = srcpixel[0]; /* red */
+                            srcpixel += 4;
+                        }
+                        srcrow += srcstride;
+                        dstrow += cbStride;
+                    }
+                }
+                else
+                {
+                    for (y = 0; y < prc->Height; y++)
+                    {
+                        srcpixel = srcrow;
+                        dstpixel = dstrow;
+                        for (x = 0; x < prc->Width; x++) {
+                            *dstpixel++ = *srcpixel++; /* blue */
+                            *dstpixel++ = *srcpixel++; /* green */
+                            *dstpixel++ = *srcpixel++; /* red */
+                            srcpixel++; /* alpha */
+                        }
+                        srcrow += srcstride;
+                        dstrow += cbStride;
                     }
-                    srcrow += srcstride;
-                    dstrow += cbStride;
                 }
             }
 
diff --git a/dll/win32/windowscodecs/main.c b/dll/win32/windowscodecs/main.c
index 78281519b81..751f4625133 100644
--- a/dll/win32/windowscodecs/main.c
+++ b/dll/win32/windowscodecs/main.c
@@ -228,6 +228,27 @@ void reverse_bgr8(UINT bytesperpixel, LPBYTE bits, UINT width, UINT height, INT
     }
 }
 
+void convert_rgba_to_bgra(UINT bytesperpixel, LPBYTE bits, UINT width, UINT height, INT stride)
+{
+    UINT x, y;
+    BYTE *pixel, temp;
+
+    for (y=0; y<height; y++)
+    {
+        pixel = bits + stride * y;
+
+        for (x=0; x<width; x++)
+        {
+            temp = pixel[3];
+            pixel[3] = pixel[0];
+            pixel[0] = pixel[1];
+            pixel[1] = pixel[2];
+            pixel[2] = temp;
+            pixel += bytesperpixel;
+        }
+    }
+}
+
 HRESULT get_pixelformat_bpp(const GUID *pixelformat, UINT *bpp)
 {
     HRESULT hr;
diff --git a/dll/win32/windowscodecs/wincodecs_private.h b/dll/win32/windowscodecs/wincodecs_private.h
index ff192c26399..d5172b6befe 100644
--- a/dll/win32/windowscodecs/wincodecs_private.h
+++ b/dll/win32/windowscodecs/wincodecs_private.h
@@ -184,6 +184,7 @@ extern HRESULT write_source(IWICBitmapFrameEncode *iface,
     INT width, INT height) DECLSPEC_HIDDEN;
 
 extern void reverse_bgr8(UINT bytesperpixel, LPBYTE bits, UINT width, UINT height, INT stride) DECLSPEC_HIDDEN;
+extern void convert_rgba_to_bgra(UINT bytesperpixel, LPBYTE bits, UINT width, UINT height, INT stride) DECLSPEC_HIDDEN;
 
 extern HRESULT get_pixelformat_bpp(const GUID *pixelformat, UINT *bpp) DECLSPEC_HIDDEN;