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Fix border case and improve speed

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svn path=/trunk/; revision=5483
This commit is contained in:
Gé van Geldorp 2003-08-09 11:56:57 +00:00
parent f4de5cad85
commit f223051440
1 changed files with 40 additions and 38 deletions
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78
reactos/drivers/dd/vga/display/vgavideo/vgavideo.c
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@ -518,7 +518,7 @@ void DIB_BltFromVGA(int x, int y, int w, int h, void *b, int Dest_lDelta)
if(edgePixel == TRUE)
{
b1 = vgaGetPixel(x2, j);
*pb = b1;
*pb = b1 << 4;
pb++;
}
@ -528,48 +528,50 @@ void DIB_BltFromVGA(int x, int y, int w, int h, void *b, int Dest_lDelta)
}
#endif
/* DIB blt to the VGA. */
void DIB_BltToVGA(int x, int y, int w, int h, void *b, int Source_lDelta)
// DIB blt to the VGA.
// For now we just do slow writes -- pixel by pixel, packing each one into the correct 4BPP format.
{
PBYTE pb = b, opb = b;
BOOLEAN edgePixel = FALSE;
ULONG i, j;
ULONG x2 = x + w;
ULONG y2 = y + h;
BYTE b1, b2;
PBYTE pb, opb = b;
ULONG i, j;
ULONG x2 = x + w;
ULONG y2 = y + h;
ULONG offset;
UCHAR a;
// Check if the width is odd
if(mod(w, 2)>0)
{
edgePixel = TRUE;
x2 -= 1;
}
for (j=y; j<y2; j++)
{
for (i=x; i<x2; i+=2)
for (i = x; i < x2; i++)
{
b1 = (*pb & 0xf0) >> 4;
b2 = *pb & 0x0f;
vgaPutPixel(i, j, b1);
vgaPutPixel(i+1, j, b2);
pb++;
pb = opb;
offset = xconv[i] + y80[y];
WRITE_PORT_UCHAR((PUCHAR)0x3ce, 0x08); // set the mask
WRITE_PORT_UCHAR((PUCHAR)0x3cf, maskbit[i]);
if (0 == ((i - x) % 2))
{
for (j = y; j < y2; j++)
{
a = READ_REGISTER_UCHAR(vidmem + offset);
WRITE_REGISTER_UCHAR(vidmem + offset, (*pb & 0xf0) >> 4);
offset += 80;
pb += Source_lDelta;
}
}
else
{
for (j = y; j < y2; j++)
{
a = READ_REGISTER_UCHAR(vidmem + offset);
WRITE_REGISTER_UCHAR(vidmem + offset, *pb & 0x0f);
offset += 80;
pb += Source_lDelta;
}
}
if (0 != ((i - x) % 2))
{
opb++;
}
}
if(edgePixel == TRUE)
{
b1 = *pb;
vgaPutPixel(x2, j, b1);
pb++;
}
opb += Source_lDelta;
pb = opb;
}
}
void DIB_TransparentBltToVGA(int x, int y, int w, int h, void *b, int Source_lDelta, ULONG trans)