[WIN32K]
authorJérôme Gardou <jerome.gardou@reactos.org>
Sat, 23 Aug 2014 14:20:16 +0000 (14:20 +0000)
committerJérôme Gardou <jerome.gardou@reactos.org>
Sat, 23 Aug 2014 14:20:16 +0000 (14:20 +0000)
 - Improve the "infamous RLE hack" in SetDIBitsToDevice by using a mask bitmap corresponding to the valid RLE data
[GDI32]
 - Improve some input checks

svn path=/trunk/; revision=63920

reactos/win32ss/gdi/gdi32/objects/bitmap.c
reactos/win32ss/gdi/gdi32/objects/utils.c
reactos/win32ss/gdi/ntgdi/dibobj.c

index ac0ba65..3ba54c1 100644 (file)
@@ -671,8 +671,7 @@ SetDIBitsToDevice(
     if (ColorUse && ColorUse != DIB_PAL_COLORS && ColorUse != DIB_PAL_COLORS + 1)
         return 0;
 
-    pConvertedInfo = ConvertBitmapInfo(lpbmi, ColorUse, &ConvertedInfoSize,
-    FALSE);
+    pConvertedInfo = ConvertBitmapInfo(lpbmi, ColorUse, &ConvertedInfoSize, FALSE);
     if (!pConvertedInfo)
         return 0;
 
@@ -720,6 +719,15 @@ SetDIBitsToDevice(
         }
     }
 #endif
+
+    if ((pConvertedInfo->bmiHeader.biCompression == BI_RLE8) ||
+            (pConvertedInfo->bmiHeader.biCompression == BI_RLE4))
+    {
+        /* For compressed data, we must set the whole thing */
+        StartScan = 0;
+        ScanLines = pConvertedInfo->bmiHeader.biHeight;
+    }
+
     cjBmpScanSize = DIB_BitmapMaxBitsSize((LPBITMAPINFO) lpbmi, ScanLines);
 
     pvSafeBits = RtlAllocateHeap(GetProcessHeap(), 0, cjBmpScanSize);
index 5b29ff2..5a0bca1 100644 (file)
@@ -296,6 +296,35 @@ ConvertBitmapInfo(
             RtlCopyMemory((PVOID)NewDataPtr, (PVOID)OldDataPtr, DataSize);
         }
     }
+    else
+    {
+        /* Verify some data validity */
+        switch (BitmapInfo->bmiHeader.biCompression)
+        {
+            case BI_RLE8:
+                if (BitmapInfo->bmiHeader.biBitCount != 8)
+                    return NULL;
+                if (BitmapInfo->bmiHeader.biHeight < 0)
+                    return NULL;
+                break;
+            case BI_RLE4:
+                if (BitmapInfo->bmiHeader.biBitCount != 4)
+                    return NULL;
+                if (BitmapInfo->bmiHeader.biHeight < 0)
+                    return NULL;
+                break;
+            default:
+                break;
+        }
+
+        /* Non "standard" formats must have a valid size set */
+        if ((BitmapInfo->bmiHeader.biCompression != BI_RGB) &&
+                (BitmapInfo->bmiHeader.biCompression != BI_BITFIELDS))
+        {
+            if (BitmapInfo->bmiHeader.biSizeImage == 0)
+                return NULL;
+        }
+    }
 
     Size = NewBitmapInfo->bmiHeader.biSize;
     if (ColorSpec == DIB_RGB_COLORS)
index e391290..28c7a2b 100644 (file)
@@ -375,6 +375,115 @@ cleanup:
     return result;
 }
 
+static
+HBITMAP
+IntGdiCreateMaskFromRLE(
+    DWORD Width,
+    DWORD Height,
+    ULONG Compression,
+    const BYTE* Bits,
+    DWORD BitsSize)
+{
+    HBITMAP Mask;
+    DWORD x, y;
+    SURFOBJ* SurfObj;
+    UINT i = 0;
+    BYTE Data, NumPixels, ToSkip;
+
+    ASSERT((Compression == BI_RLE8) || (Compression == BI_RLE4));
+
+    /* Create the bitmap */
+    Mask = GreCreateBitmapEx(Width, Height, 0, BMF_1BPP, 0, 0, NULL, 0);
+    if (!Mask)
+        return NULL;
+
+    SurfObj = EngLockSurface((HSURF)Mask);
+    if (!SurfObj)
+    {
+        GreDeleteObject(Mask);
+        return NULL;
+    }
+    ASSERT(SurfObj->pvBits != NULL);
+
+    x = y = 0;
+
+    while (i < BitsSize)
+    {
+        NumPixels = Bits[i];
+        Data = Bits[i + 1];
+        i += 2;
+
+        if (NumPixels != 0)
+        {
+            if ((x + NumPixels) > Width)
+                NumPixels = Width - x;
+
+            if (NumPixels == 0)
+                continue;
+
+            DIB_1BPP_HLine(SurfObj, x, x + NumPixels, y, 1);
+            x += NumPixels;
+            continue;
+        }
+
+        if (Data < 3)
+        {
+            switch (Data)
+            {
+                case 0:
+                    /* End of line */
+                    y++;
+                    if (y == Height)
+                        goto done;
+                    x = 0;
+                    break;
+                case 1:
+                    /* End of file */
+                    goto done;
+                case 2:
+                    /* Jump */
+                    if (i >= (BitsSize - 1))
+                        goto done;
+                    x += Bits[i];
+                    if (x > Width)
+                        x = Width;
+                    y += Bits[i + 1];
+                    if (y >= Height)
+                        goto done;
+                    i += 2;
+                    break;
+            }
+            /* Done for this run */
+            continue;
+        }
+
+        /* Embedded data into the RLE */
+        NumPixels = Data;
+        if (Compression == BI_RLE8)
+            ToSkip = NumPixels;
+        else
+            ToSkip = (NumPixels / 2) + (NumPixels & 1);
+
+        if ((i + ToSkip) > BitsSize)
+            goto done;
+        ToSkip = (ToSkip + 1) & ~1;
+
+        if ((x + NumPixels) > Width)
+            NumPixels = Width - x;
+
+        if (NumPixels != 0)
+        {
+            DIB_1BPP_HLine(SurfObj, x, x + NumPixels, y, 1);
+            x += NumPixels;
+        }
+        i += ToSkip;
+    }
+
+done:
+    EngUnlockSurface(SurfObj);
+    return Mask;
+}
+
 W32KAPI
 INT
 APIENTRY
@@ -399,8 +508,8 @@ NtGdiSetDIBitsToDeviceInternal(
     INT ret = 0;
     NTSTATUS Status = STATUS_SUCCESS;
     PDC pDC;
-    HBITMAP hSourceBitmap = NULL;
-    SURFOBJ *pDestSurf, *pSourceSurf = NULL;
+    HBITMAP hSourceBitmap = NULL, hMaskBitmap = NULL;
+    SURFOBJ *pDestSurf, *pSourceSurf = NULL, *pMaskSurf = NULL;
     SURFACE *pSurf;
     RECTL rcDest;
     POINTL ptSource;
@@ -492,6 +601,29 @@ NtGdiSetDIBitsToDeviceInternal(
         goto Exit;
     }
 
+    /* HACK: If this is a RLE bitmap, only the relevant pixels must be set. */
+    if ((bmi->bmiHeader.biCompression == BI_RLE8) || (bmi->bmiHeader.biCompression == BI_RLE4))
+    {
+        ASSERT(ScanLines == bmi->bmiHeader.biHeight);
+        hMaskBitmap = IntGdiCreateMaskFromRLE(bmi->bmiHeader.biWidth,
+            ScanLines,
+            bmi->bmiHeader.biCompression,
+            Bits,
+            cjMaxBits);
+        if (!hMaskBitmap)
+        {
+            EngSetLastError(ERROR_NO_SYSTEM_RESOURCES);
+            Status = STATUS_NO_MEMORY;
+            goto Exit;
+        }
+        pMaskSurf = EngLockSurface((HSURF)hMaskBitmap);
+        if (!pMaskSurf)
+        {
+            Status = STATUS_UNSUCCESSFUL;
+            goto Exit;
+        }
+    }
+
     /* Create a palette for the DIB */
     ppalDIB = CreateDIBPalette(bmi, pDC, ColorUse);
     if (!ppalDIB)
@@ -529,15 +661,15 @@ NtGdiSetDIBitsToDeviceInternal(
            ptSource.x, ptSource.y, SourceSize.cx, SourceSize.cy);
     Status = IntEngBitBlt(pDestSurf,
                           pSourceSurf,
-                          NULL,
+                          pMaskSurf,
                           &pDC->co.ClipObj,
                           &exlo.xlo,
                           &rcDest,
                           &ptSource,
+                          pMaskSurf ? &ptSource : NULL,
                           NULL,
                           NULL,
-                          NULL,
-                          ROP4_FROM_INDEX(R3_OPINDEX_SRCCOPY));
+                          pMaskSurf ? ROP4_MASK : ROP4_FROM_INDEX(R3_OPINDEX_SRCCOPY));
 
     /* Cleanup EXLATEOBJ */
     EXLATEOBJ_vCleanup(&exlo);
@@ -555,6 +687,8 @@ Exit:
 
     if (pSourceSurf) EngUnlockSurface(pSourceSurf);
     if (hSourceBitmap) EngDeleteSurface((HSURF)hSourceBitmap);
+    if (pMaskSurf) EngUnlockSurface(pMaskSurf);
+    if (hMaskBitmap) EngDeleteSurface((HSURF)hMaskBitmap);
     DC_UnlockDc(pDC);
 Exit2:
     ExFreePoolWithTag(pbmiSafe, 'pmTG');