reactos/win32ss/gdi/dib/stretchblt.c

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/*
* PROJECT: ReactOS Win32k subsystem
* LICENSE: See COPYING in the top level directory
* FILE: win32ss/gdi/dib/stretchblt.c
* PURPOSE: StretchBlt implementation suitable for all bit depths
* PROGRAMMERS: Magnus Olsen
* Evgeniy Boltik
* Gregor Schneider
* Doug Lyons
*/
#include <win32k.h>
#define NDEBUG
#include <debug.h>
BOOLEAN DIB_XXBPP_StretchBlt(SURFOBJ *DestSurf, SURFOBJ *SourceSurf, SURFOBJ *MaskSurf,
SURFOBJ *PatternSurface,
RECTL *DestRect, RECTL *SourceRect,
POINTL *MaskOrigin, BRUSHOBJ *Brush,
POINTL *BrushOrigin, XLATEOBJ *ColorTranslation,
ROP4 ROP)
{
LONG sx = 0;
LONG sy = 0;
LONG DesX;
LONG DesY;
LONG DstHeight;
LONG DstWidth;
LONG SrcHeight;
LONG SrcWidth;
LONG MaskCy;
LONG SourceCy;
ULONG Color;
ULONG Dest, Source = 0, Pattern = 0;
ULONG xxBPPMask;
BOOLEAN CanDraw;
PFN_DIB_GetPixel fnSource_GetPixel = NULL;
PFN_DIB_GetPixel fnDest_GetPixel = NULL;
PFN_DIB_PutPixel fnDest_PutPixel = NULL;
PFN_DIB_GetPixel fnPattern_GetPixel = NULL;
PFN_DIB_GetPixel fnMask_GetPixel = NULL;
LONG PatternX = 0, PatternY = 0;
BOOL UsesSource = ROP4_USES_SOURCE(ROP);
BOOL UsesPattern = ROP4_USES_PATTERN(ROP);
BOOLEAN bTopToBottom, bLeftToRight;
ASSERT(IS_VALID_ROP4(ROP));
fnDest_GetPixel = DibFunctionsForBitmapFormat[DestSurf->iBitmapFormat].DIB_GetPixel;
fnDest_PutPixel = DibFunctionsForBitmapFormat[DestSurf->iBitmapFormat].DIB_PutPixel;
DPRINT("Dest BPP: %u, DestRect: (%d,%d)-(%d,%d)\n",
BitsPerFormat(DestSurf->iBitmapFormat), DestRect->left, DestRect->top, DestRect->right, DestRect->bottom);
DstHeight = DestRect->bottom - DestRect->top;
DstWidth = DestRect->right - DestRect->left;
SrcHeight = SourceRect->bottom - SourceRect->top;
SrcWidth = SourceRect->right - SourceRect->left;
/* Here we do the tests and set our conditions */
if (((SrcWidth < 0) && (DstWidth < 0)) || ((SrcWidth >= 0) && (DstWidth >= 0)))
bLeftToRight = FALSE;
else
bLeftToRight = TRUE;
if (((SrcHeight < 0) && (DstHeight < 0)) || ((SrcHeight >= 0) && (DstHeight >= 0)))
bTopToBottom = FALSE;
else
bTopToBottom = TRUE;
/* Make Well Ordered to start */
RECTL_vMakeWellOrdered(DestRect);
if (UsesSource)
{
SourceCy = SourceSurf->sizlBitmap.cy;
fnSource_GetPixel = DibFunctionsForBitmapFormat[SourceSurf->iBitmapFormat].DIB_GetPixel;
DPRINT("Source BPP: %u, SourceRect: (%d,%d)-(%d,%d)\n",
BitsPerFormat(SourceSurf->iBitmapFormat), SourceRect->left, SourceRect->top, SourceRect->right, SourceRect->bottom);
}
if (MaskSurf)
{
DPRINT("MaskSurf is not NULL.\n");
fnMask_GetPixel = DibFunctionsForBitmapFormat[MaskSurf->iBitmapFormat].DIB_GetPixel;
MaskCy = MaskSurf->sizlBitmap.cy;
}
DstHeight = DestRect->bottom - DestRect->top;
DstWidth = DestRect->right - DestRect->left;
SrcHeight = SourceRect->bottom - SourceRect->top;
SrcWidth = SourceRect->right - SourceRect->left;
/* FIXME: MaskOrigin? */
switch(DestSurf->iBitmapFormat)
{
case BMF_1BPP: xxBPPMask = 0x1; break;
case BMF_4BPP: xxBPPMask = 0xF; break;
case BMF_8BPP: xxBPPMask = 0xFF; break;
case BMF_16BPP: xxBPPMask = 0xFFFF; break;
case BMF_24BPP: xxBPPMask = 0xFFFFFF; break;
default:
xxBPPMask = 0xFFFFFFFF;
}
DPRINT("xxBPPMask is 0x%x.\n", xxBPPMask);
if (UsesPattern)
{
DPRINT("UsesPattern is not NULL.\n");
if (PatternSurface)
{
PatternY = (DestRect->top - BrushOrigin->y) % PatternSurface->sizlBitmap.cy;
if (PatternY < 0)
{
PatternY += PatternSurface->sizlBitmap.cy;
}
fnPattern_GetPixel = DibFunctionsForBitmapFormat[PatternSurface->iBitmapFormat].DIB_GetPixel;
}
else
{
if (Brush)
Pattern = Brush->iSolidColor;
}
}
if (PatternSurface)
{
DPRINT("PatternSurface is not NULL.\n");
}
DPRINT("bLeftToRight is '%d' and bTopToBottom is '%d'.\n", bLeftToRight, bTopToBottom);
for (DesY = DestRect->top; DesY < DestRect->bottom; DesY++)
{
if (PatternSurface)
{
PatternX = (DestRect->left - BrushOrigin->x) % PatternSurface->sizlBitmap.cx;
if (PatternX < 0)
{
PatternX += PatternSurface->sizlBitmap.cx;
}
}
if (UsesSource)
{
if (bTopToBottom)
{
sy = SourceRect->bottom-(DesY - DestRect->top) * SrcHeight / DstHeight; // flips about the x-axis
}
else
{
sy = SourceRect->top+(DesY - DestRect->top) * SrcHeight / DstHeight;
}
}
for (DesX = DestRect->left; DesX < DestRect->right; DesX++)
{
CanDraw = TRUE;
if (fnMask_GetPixel)
{
if (bLeftToRight)
{
sx = SourceRect->right - (DesX - DestRect->left) * SrcWidth / DstWidth; // flips about the y-axis
}
else
{
sx = SourceRect->left+(DesX - DestRect->left) * SrcWidth / DstWidth;
}
if (sx < 0 || sy < 0 ||
MaskSurf->sizlBitmap.cx < sx || MaskCy < sy ||
fnMask_GetPixel(MaskSurf, sx, sy) != 0)
{
CanDraw = FALSE;
}
}
if (UsesSource && CanDraw)
{
if (bLeftToRight)
{
sx = SourceRect->right-(DesX - DestRect->left) * SrcWidth / DstWidth; // flips about the y-axis
}
else
{
sx = SourceRect->left + (DesX - DestRect->left) * SrcWidth / DstWidth;
}
if (sx >= 0 && sy >= 0 &&
SourceSurf->sizlBitmap.cx > sx && SourceCy > sy)
{
Source = XLATEOBJ_iXlate(ColorTranslation, fnSource_GetPixel(SourceSurf, sx, sy));
}
else
{
Source = 0;
CanDraw = ((ROP & 0xFF) != R3_OPINDEX_SRCCOPY);
}
}
if (CanDraw)
{
if (UsesPattern && PatternSurface)
{
Pattern = fnPattern_GetPixel(PatternSurface, PatternX, PatternY);
PatternX++;
PatternX %= PatternSurface->sizlBitmap.cx;
}
Dest = fnDest_GetPixel(DestSurf, DesX, DesY);
Color = DIB_DoRop(ROP, Dest, Source, Pattern) & xxBPPMask;
fnDest_PutPixel(DestSurf, DesX, DesY, Color);
}
}
if (PatternSurface)
{
PatternY++;
PatternY %= PatternSurface->sizlBitmap.cy;
}
}
return TRUE;
}
/* EOF */