[jgardou] 57293: [WIN32SS] * Properly implement GetNearestColor

Author: jgardou
Date: Thu Sep 13 21:49:32 2012
New Revision: 57293

URL: http://svn.reactos.org/svn/reactos?rev=57293&view=rev
Log:
[WIN32SS]
* Properly implement GetNearestColor

Modified:
    trunk/reactos/win32ss/gdi/ntgdi/bitblt.c
    trunk/reactos/win32ss/gdi/ntgdi/dc.h
    trunk/reactos/win32ss/gdi/ntgdi/dcutil.c
    trunk/reactos/win32ss/gdi/ntgdi/palette.c

Modified: trunk/reactos/win32ss/gdi/ntgdi/bitblt.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/ntgdi/bitblt.c…
==============================================================================
--- trunk/reactos/win32ss/gdi/ntgdi/bitblt.c [iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/ntgdi/bitblt.c [iso-8859-1] Thu Sep 13 21:49:32 2012
@@ -16,74 +16,6 @@
 
 #define FIXUP_ROP(Rop) if(((Rop) & 0xFF000000) == 0) Rop = MAKEROP4((Rop), (Rop))
 #define ROP_TO_ROP4(Rop) ((Rop) >> 16)
-
-ULONG
-TranslateCOLORREF(PDC pdc, COLORREF crColor)
-{
-    PPALETTE ppalDC, ppalSurface;
-    ULONG index, ulColor, iBitmapFormat;
-    EXLATEOBJ exlo;
-
-    switch (crColor >> 24)
-    {
-        case 0x00: /* RGB color */
-            break;
-
-        case 0x01: /* PALETTEINDEX */
-            index = crColor & 0xFFFFFF;
-            ppalDC = pdc->dclevel.ppal;
-            if (index >= ppalDC->NumColors) index = 0;
-
-            /* Get the RGB value */
-            crColor = PALETTE_ulGetRGBColorFromIndex(ppalDC, index);
-            break;
-
-        case 0x02: /* PALETTERGB */
-
-            if (pdc->dclevel.hpal != StockObjects[DEFAULT_PALETTE])
-            {
-                /* First find the nearest index in the dc palette */
-                ppalDC = pdc->dclevel.ppal;
-                index = PALETTE_ulGetNearestIndex(ppalDC, crColor & 0xFFFFFF);
-
-                /* Get the RGB value */
-                crColor = PALETTE_ulGetRGBColorFromIndex(ppalDC, index);
-            }
-            else
-            {
-                /* Use the pure color */
-                crColor = crColor & 0x00FFFFFF;
-            }
-            break;
-
-        case 0x10: /* DIBINDEX */
-            /* Mask the value to match the target bpp */
-            iBitmapFormat = pdc->dclevel.pSurface->SurfObj.iBitmapFormat;
-            if (iBitmapFormat == BMF_1BPP) index = crColor & 0x1;
-            else if (iBitmapFormat == BMF_4BPP) index = crColor & 0xf;
-            else if (iBitmapFormat == BMF_8BPP) index = crColor & 0xFF;
-            else if (iBitmapFormat == BMF_16BPP) index = crColor & 0xFFFF;
-            else index = crColor & 0xFFFFFF;
-            return index;
-
-        default:
-            DPRINT("Unsupported color type %u passed\n", crColor >> 24);
-            crColor &= 0xFFFFFF;
-    }
-
-    /* Initialize an XLATEOBJ from RGB to the target surface */
-    ppalSurface = pdc->dclevel.pSurface->ppal;
-    EXLATEOBJ_vInitialize(&exlo, &gpalRGB, ppalSurface, 0xFFFFFF, 0, 0);
-
-    /* Translate the color to the target format */
-    ulColor = XLATEOBJ_iXlate(&exlo.xlo, crColor);
-
-    /* Cleanup the XLATEOBJ */
-    EXLATEOBJ_vCleanup(&exlo);
-
-    return ulColor;
-}
-
 
 BOOL APIENTRY
 NtGdiAlphaBlend(

Modified: trunk/reactos/win32ss/gdi/ntgdi/dc.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/ntgdi/dc.h?rev…
==============================================================================
--- trunk/reactos/win32ss/gdi/ntgdi/dc.h [iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/ntgdi/dc.h [iso-8859-1] Thu Sep 13 21:49:32 2012
@@ -162,6 +162,18 @@
     HPALETTE hpal,
     BOOL ForceBackground);
 
+/* dcutil.c */
+
+COLORREF
+FASTCALL
+IntGdiSetBkColor (HDC hDC, COLORREF Color);
+INT FASTCALL IntGdiSetBkMode(HDC  hDC, INT  backgroundMode);
+COLORREF FASTCALL  IntGdiSetTextColor(HDC hDC, COLORREF color);
+UINT FASTCALL IntGdiSetTextAlign(HDC  hDC, UINT  Mode);
+VOID FASTCALL DCU_SetDcUndeletable(HDC);
+BOOL FASTCALL IntSetDefaultRegion(PDC);
+ULONG TranslateCOLORREF(PDC pdc, COLORREF crColor);
+
 
 
 INIT_FUNCTION NTSTATUS NTAPI InitDcImpl(VOID);
@@ -179,20 +191,15 @@
 
 VOID NTAPI DC_vRestoreDC(IN PDC pdc, INT iSaveLevel);
 
-VOID FASTCALL DCU_SetDcUndeletable(HDC);
 VOID NTAPI DC_vFreeDcAttr(PDC pdc);
 VOID NTAPI DC_vInitDc(PDC pdc, DCTYPE dctype, PPDEVOBJ ppdev);
 
-COLORREF FASTCALL IntGdiSetBkColor (HDC hDC, COLORREF Color);
-INT FASTCALL IntGdiSetBkMode(HDC  hDC, INT  backgroundMode);
-COLORREF FASTCALL  IntGdiSetTextColor(HDC hDC, COLORREF color);
-UINT FASTCALL IntGdiSetTextAlign(HDC  hDC, UINT  Mode);
 VOID FASTCALL IntGdiReferencePdev(PPDEVOBJ pPDev);
 VOID FASTCALL IntGdiUnreferencePdev(PPDEVOBJ pPDev, DWORD CleanUpType);
 HDC FASTCALL IntGdiCreateDisplayDC(HDEV hDev, ULONG DcType, BOOL EmptyDC);
 BOOL FASTCALL IntGdiCleanDC(HDC hDC);
 VOID FASTCALL IntvGetDeviceCaps(PPDEVOBJ, PDEVCAPS);
-BOOL FASTCALL IntSetDefaultRegion(PDC);
+
 BOOL NTAPI GreSetDCOwner(HDC hdc, ULONG ulOwner);
 
 VOID

Modified: trunk/reactos/win32ss/gdi/ntgdi/dcutil.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/ntgdi/dcutil.c…
==============================================================================
--- trunk/reactos/win32ss/gdi/ntgdi/dcutil.c [iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/ntgdi/dcutil.c [iso-8859-1] Thu Sep 13 21:49:32 2012
@@ -551,3 +551,73 @@
     DC_UnlockDc(pdc);
     return ret;
 }
+
+/* Translates a COLORREF to the right color in the specified DC color space */ 
+ULONG
+TranslateCOLORREF(PDC pdc, COLORREF crColor)
+{
+    PPALETTE ppalDC, ppalSurface;
+    ULONG index, ulColor, iBitmapFormat;
+    EXLATEOBJ exlo;
+
+    switch (crColor >> 24)
+    {
+        case 0x00: /* RGB color */
+            break;
+
+        case 0x01: /* PALETTEINDEX */
+            index = crColor & 0xFFFFFF;
+            ppalDC = pdc->dclevel.ppal;
+            if (index >= ppalDC->NumColors) index = 0;
+
+            /* Get the RGB value */
+            crColor = PALETTE_ulGetRGBColorFromIndex(ppalDC, index);
+            break;
+
+        case 0x02: /* PALETTERGB */
+
+            if (pdc->dclevel.hpal != StockObjects[DEFAULT_PALETTE])
+            {
+                /* First find the nearest index in the dc palette */
+                ppalDC = pdc->dclevel.ppal;
+                index = PALETTE_ulGetNearestIndex(ppalDC, crColor & 0xFFFFFF);
+
+                /* Get the RGB value */
+                crColor = PALETTE_ulGetRGBColorFromIndex(ppalDC, index);
+            }
+            else
+            {
+                /* Use the pure color */
+                crColor = crColor & 0x00FFFFFF;
+            }
+            break;
+
+        case 0x10: /* DIBINDEX */
+            /* Mask the value to match the target bpp */
+            iBitmapFormat = pdc->dclevel.pSurface->SurfObj.iBitmapFormat;
+            if (iBitmapFormat == BMF_1BPP) index = crColor & 0x1;
+            else if (iBitmapFormat == BMF_4BPP) index = crColor & 0xf;
+            else if (iBitmapFormat == BMF_8BPP) index = crColor & 0xFF;
+            else if (iBitmapFormat == BMF_16BPP) index = crColor & 0xFFFF;
+            else index = crColor & 0xFFFFFF;
+            return index;
+
+        default:
+            DPRINT("Unsupported color type %u passed\n", crColor >> 24);
+            crColor &= 0xFFFFFF;
+    }
+
+    /* Initialize an XLATEOBJ from RGB to the target surface */
+    ppalSurface = pdc->dclevel.pSurface->ppal;
+    EXLATEOBJ_vInitialize(&exlo, &gpalRGB, ppalSurface, 0xFFFFFF, 0, 0);
+
+    /* Translate the color to the target format */
+    ulColor = XLATEOBJ_iXlate(&exlo.xlo, crColor);
+
+    /* Cleanup the XLATEOBJ */
+    EXLATEOBJ_vCleanup(&exlo);
+
+    return ulColor;
+}
+
+

Modified: trunk/reactos/win32ss/gdi/ntgdi/palette.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/ntgdi/palette.…
==============================================================================
--- trunk/reactos/win32ss/gdi/ntgdi/palette.c [iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/ntgdi/palette.c [iso-8859-1] Thu Sep 13 21:49:32 2012
@@ -684,47 +684,47 @@
     return FALSE;
 }
 
-COLORREF APIENTRY NtGdiGetNearestColor(HDC hDC, COLORREF Color)
-{
-   COLORREF nearest = CLR_INVALID;
-   PDC dc;
-   PPALETTE palGDI;
-   LONG RBits, GBits, BBits;
-
-   dc = DC_LockDc(hDC);
-   if (NULL != dc)
-   {
-      HPALETTE hpal = dc->dclevel.hpal;
-      palGDI = PALETTE_ShareLockPalette(hpal);
-      if (!palGDI)
-      {
-         DC_UnlockDc(dc);
-         return nearest;
-      }
-
-      if (palGDI->flFlags & PAL_INDEXED)
-      {
-         ULONG index;
-         index = PALETTE_ulGetNearestPaletteIndex(palGDI, Color);
-         nearest = PALETTE_ulGetRGBColorFromIndex(palGDI, index);
-      }
-      else if (palGDI->flFlags & PAL_RGB || palGDI->flFlags & PAL_BGR)
-      {
-         nearest = Color;
-      }
-      else if (palGDI->flFlags & PAL_BITFIELDS)
-      {
-         RBits = 8 - GetNumberOfBits(palGDI->RedMask);
-         GBits = 8 - GetNumberOfBits(palGDI->GreenMask);
-         BBits = 8 - GetNumberOfBits(palGDI->BlueMask);
-         nearest = RGB(
-            (GetRValue(Color) >> RBits) << RBits,
-            (GetGValue(Color) >> GBits) << GBits,
-            (GetBValue(Color) >> BBits) << BBits);
-      }
-      PALETTE_ShareUnlockPalette(palGDI);
-      DC_UnlockDc(dc);
-   }
+COLORREF
+APIENTRY
+NtGdiGetNearestColor(
+    _In_ HDC hDC,
+    _In_ COLORREF Color)
+{
+    COLORREF nearest = CLR_INVALID;
+    PDC dc;
+    EXLATEOBJ exlo;
+    PPALETTE ppal;
+
+    dc = DC_LockDc(hDC);
+
+    if(dc == NULL)
+    {
+        EngSetLastError(ERROR_INVALID_HANDLE);
+        return CLR_INVALID;
+    }
+    
+    if(dc->dclevel.pSurface == NULL)
+        ppal = gppalMono;
+    else
+        ppal = dc->dclevel.pSurface->ppal;
+    
+    /* Translate the color to the DC format */
+    Color = TranslateCOLORREF(dc, Color);
+    
+    /* XLATE it back to RGB color space */
+    EXLATEOBJ_vInitialize(&exlo,
+        ppal,
+        &gpalRGB,
+        0,
+        RGB(0xff, 0xff, 0xff),
+        RGB(0, 0, 0));
+    
+    nearest = XLATEOBJ_iXlate(&exlo.xlo, Color);
+    
+    EXLATEOBJ_vCleanup(&exlo);
+    
+    /* We're done */
+    DC_UnlockDc(dc);
 
    return nearest;
 }