[greatlrd] 20538: Thx GvG for helping put to gather a new math formula that make alot of calc not needed any longer. and correct fourmla for rounding fault. I did not think of it when I rewrote the streachblt. it feal strechblt is bit fasfer agains the old one.
2 Jan
2006
2 Jan
'06
11:43 p.m.
Thx GvG for helping put to gather a new math formula that make alot of
calc not needed any longer. and correct fourmla for rounding fault. I
did not think of it when I rewrote the streachblt. it feal strechblt is
bit fasfer agains the old one.
Modified: trunk/reactos/subsys/win32k/dib/dib16bpp.c
_____
Modified: trunk/reactos/subsys/win32k/dib/dib16bpp.c
--- trunk/reactos/subsys/win32k/dib/dib16bpp.c 2006-01-02 20:51:54 UTC
(rev 20537)
+++ trunk/reactos/subsys/win32k/dib/dib16bpp.c 2006-01-02 23:43:43 UTC
(rev 20538)
@@ -619,13 +619,7 @@
int DesX;
int DesY;
int color;
- int zoomX;
- int zoomY;
- // int count;
- // int saveX;
- // int saveY;
- BOOLEAN DesIsBiggerY=FALSE;
-
+
DPRINT("DIB_16BPP_StretchBlt: Source BPP: %u, srcRect:
(%d,%d)-(%d,%d), dstRect: (%d,%d)-(%d,%d)\n",
BitsPerFormat(SourceSurf->iBitmapFormat), SourceRect->left,
SourceRect->top, SourceRect->right, SourceRect->bottom,
DestRect->left, DestRect->top, DestRect->right, DestRect->bottom);
@@ -635,24 +629,7 @@
DesSizeY = DestRect->bottom - DestRect->top;
DesSizeX = DestRect->right - DestRect->left;
- /*
- SrcSizeY = SourceRect->bottom;
- SrcSizeX = SourceRect->right;
-
- DesSizeY = DestRect->bottom;
- DesSizeX = DestRect->right;
- */
- zoomX = DesSizeX / SrcSizeX;
- if (zoomX==0) zoomX=1;
-
- zoomY = DesSizeY / SrcSizeY;
- if (zoomY==0) zoomY=1;
-
- if (DesSizeY>SrcSizeY)
- DesIsBiggerY = TRUE;
-
-
switch(SourceSurf->iBitmapFormat)
{
@@ -662,23 +639,11 @@
for (DesY=DestRect->top; DesY<DestRect->bottom; DesY++)
{
- if (DesSizeY>SrcSizeY)
- sy = SourceRect->top + ((DesY - DestRect->top) /
zoomY);
- else
- sy = SourceRect->top + ((DesY - DestRect->top) *
zoomY);
-
- if (sy > SourceRect->bottom)
- sy = SourceRect->bottom;
+ sy = (((DesY - DestRect->top) * SrcSizeY) / DesSizeY) +
SourceRect->top;
for (DesX=DestRect->left; DesX<DestRect->right; DesX++)
{
- if (DesSizeX>SrcSizeX)
- sx = SourceRect->left + ((DesX - DestRect->left) /
zoomX);
- else
- sx = SourceRect->left + ((DesX - DestRect->left) *
zoomX);
-
- if (sx > SourceRect->right)
- sx = SourceRect->right;
+ sx = (((DesX - DestRect->left) * SrcSizeX) /
DesSizeX) + SourceRect->left;
if(DIB_1BPP_GetPixel(SourceSurf, sx, sy) == 0)
{
@@ -698,24 +663,11 @@
for (DesY=DestRect->top; DesY<DestRect->bottom; DesY++)
{
- if (DesSizeY>SrcSizeY)
- sy = SourceRect->top + ((DesY - DestRect->top) /
zoomY);
- else
- sy = SourceRect->top + ((DesY - DestRect->top) *
zoomY);
-
- if (sy > SourceRect->bottom)
- sy = SourceRect->bottom;
+ sy = (((DesY - DestRect->top) * SrcSizeY) / DesSizeY) +
SourceRect->top;
for (DesX=DestRect->left; DesX<DestRect->right; DesX++)
{
- if (DesSizeX>SrcSizeX)
- sx = SourceRect->left + ((DesX - DestRect->left) /
zoomX);
- else
- sx = SourceRect->left + ((DesX - DestRect->left) *
zoomX);
-
- if (sx > SourceRect->right)
- sx = SourceRect->right;
-
+ sx = (((DesX - DestRect->left) * SrcSizeX) / DesSizeX)
+ SourceRect->left;
color = DIB_4BPP_GetPixel(SourceSurf, sx, sy);
DIB_16BPP_PutPixel(DestSurf, DesX, DesY,
XLATEOBJ_iXlate(ColorTranslation, color));
}
@@ -728,24 +680,11 @@
for (DesY=DestRect->top; DesY<DestRect->bottom; DesY++)
{
- if (DesSizeY>SrcSizeY)
- sy = SourceRect->top + ((DesY - DestRect->top) /
zoomY);
- else
- sy = SourceRect->top + ((DesY - DestRect->top) *
zoomY);
-
- if (sy > SourceRect->bottom)
- sy = SourceRect->bottom;
+ sy = (((DesY - DestRect->top) * SrcSizeY) / DesSizeY) +
SourceRect->top;
for (DesX=DestRect->left; DesX<DestRect->right; DesX++)
{
- if (DesSizeX>SrcSizeX)
- sx = SourceRect->left + ((DesX - DestRect->left) /
zoomX);
- else
- sx = SourceRect->left + ((DesX - DestRect->left) *
zoomX);
-
- if (sx > SourceRect->right)
- sx = SourceRect->right;
-
+ sx = (((DesX - DestRect->left) * SrcSizeX) / DesSizeX)
+ SourceRect->left;
color = DIB_8BPP_GetPixel(SourceSurf, sx, sy);
DIB_16BPP_PutPixel(DestSurf, DesX, DesY,
XLATEOBJ_iXlate(ColorTranslation, color));
}
@@ -758,24 +697,11 @@
for (DesY=DestRect->top; DesY<DestRect->bottom; DesY++)
{
- if (DesSizeY>SrcSizeY)
- sy = SourceRect->top + ((DesY - DestRect->top) /
zoomY);
- else
- sy = SourceRect->top + ((DesY - DestRect->top) *
zoomY);
-
- if (sy > SourceRect->bottom)
- sy = SourceRect->bottom;
-
+ sy = (((DesY - DestRect->top) * SrcSizeY) / DesSizeY) +
SourceRect->top;
+
for (DesX=DestRect->left; DesX<DestRect->right; DesX++)
{
- if (DesSizeX>SrcSizeX)
- sx = SourceRect->left + ((DesX - DestRect->left) /
zoomX);
- else
- sx = SourceRect->left + ((DesX - DestRect->left) *
zoomX);
-
- if (sx > SourceRect->right)
- sx = SourceRect->right;
-
+ sx = (((DesX - DestRect->left) * SrcSizeX) / DesSizeX)
+ SourceRect->left;
color = DIB_24BPP_GetPixel(SourceSurf, sx, sy);
DIB_16BPP_PutPixel(DestSurf, DesX, DesY,
XLATEOBJ_iXlate(ColorTranslation, color));
}
@@ -788,24 +714,11 @@
for (DesY=DestRect->top; DesY<DestRect->bottom; DesY++)
{
- if (DesSizeY>SrcSizeY)
- sy = SourceRect->top + ((DesY - DestRect->top) /
zoomY);
- else
- sy = SourceRect->top + ((DesY - DestRect->top) *
zoomY);
-
- if (sy > SourceRect->bottom)
- sy = SourceRect->bottom;
+ sy = (((DesY - DestRect->top) * SrcSizeY) / DesSizeY) +
SourceRect->top;
for (DesX=DestRect->left; DesX<DestRect->right; DesX++)
{
- if (DesSizeX>SrcSizeX)
- sx = SourceRect->left + ((DesX - DestRect->left) /
zoomX);
- else
- sx = SourceRect->left + ((DesX - DestRect->left) *
zoomX);
-
- if (sx > SourceRect->right)
- sx = SourceRect->right;
-
+ sx = (((DesX - DestRect->left) * SrcSizeX) / DesSizeX)
+ SourceRect->left;
color = DIB_32BPP_GetPixel(SourceSurf, sx, sy);
DIB_16BPP_PutPixel(DestSurf, DesX, DesY,
XLATEOBJ_iXlate(ColorTranslation, color));
}
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greatlrd＠svn.reactos.org