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Diffstat (limited to 'src/mame/video/williams.c')
-rw-r--r--src/mame/video/williams.c20
1 files changed, 10 insertions, 10 deletions
diff --git a/src/mame/video/williams.c b/src/mame/video/williams.c
index 88efe3e1aae..9ebc620651b 100644
--- a/src/mame/video/williams.c
+++ b/src/mame/video/williams.c
@@ -549,13 +549,13 @@ WRITE8_MEMBER(williams_state::williams2_blit_window_enable_w)
inline void williams_state::blit_pixel(address_space &space, int dstaddr, int srcdata, int controlbyte)
{
/* always read from video RAM regardless of the bank setting */
- int curpix = (dstaddr < 0xc000) ? m_videoram[dstaddr] : space.read_byte(dstaddr); //current pixel values at dest
+ int curpix = (dstaddr < 0xc000) ? m_videoram[dstaddr] : space.read_byte(dstaddr); //current pixel values at dest
int solid = m_blitterram[1];
- unsigned char keepmask = 0xff; //what part of original dst byte should be kept, based on NO_EVEN and NO_ODD flags
+ unsigned char keepmask = 0xff; //what part of original dst byte should be kept, based on NO_EVEN and NO_ODD flags
//even pixel (D7-D4)
- if((controlbyte & WMS_BLITTER_CONTROLBYTE_FOREGROUND_ONLY) && !(srcdata & 0xf0)) //FG only and src even pixel=0
+ if((controlbyte & WMS_BLITTER_CONTROLBYTE_FOREGROUND_ONLY) && !(srcdata & 0xf0)) //FG only and src even pixel=0
{
if(controlbyte & WMS_BLITTER_CONTROLBYTE_NO_EVEN)
keepmask &= 0x0f;
@@ -567,7 +567,7 @@ inline void williams_state::blit_pixel(address_space &space, int dstaddr, int sr
}
//odd pixel (D3-D0)
- if((controlbyte & WMS_BLITTER_CONTROLBYTE_FOREGROUND_ONLY) && !(srcdata & 0x0f)) //FG only and src odd pixel=0
+ if((controlbyte & WMS_BLITTER_CONTROLBYTE_FOREGROUND_ONLY) && !(srcdata & 0x0f)) //FG only and src odd pixel=0
{
if(controlbyte & WMS_BLITTER_CONTROLBYTE_NO_ODD)
keepmask &= 0xf0;
@@ -576,14 +576,14 @@ inline void williams_state::blit_pixel(address_space &space, int dstaddr, int sr
{
if(!(controlbyte & WMS_BLITTER_CONTROLBYTE_NO_ODD))
keepmask &= 0xf0;
- }
+ }
curpix &= keepmask;
if(controlbyte & WMS_BLITTER_CONTROLBYTE_SOLID)
curpix |= (solid & ~keepmask);
else
curpix |= (srcdata & ~keepmask);
-
+
/* if the window is enabled, only blit to videoram below the clipping address */
/* note that we have to allow blits to non-video RAM (e.g. tileram, Sinistar $DXXX SRAM) because those */
/* are not blocked by the window enable */
@@ -612,16 +612,16 @@ int williams_state::blitter_core(address_space &space, int sstart, int dstart, i
{
source = sstart & 0xffff;
dest = dstart & 0xffff;
-
+
/* loop over the width */
- for (x = 0; x < w; x++)
+ for (x = 0; x < w; x++)
{
- if (!(controlbyte & WMS_BLITTER_CONTROLBYTE_SHIFT)) //no shift
+ if (!(controlbyte & WMS_BLITTER_CONTROLBYTE_SHIFT)) //no shift
{
blit_pixel(space, dest, m_blitter_remap[space.read_byte(source)], controlbyte);
}
else
- { //shift one pixel right
+ { //shift one pixel right
pixdata = (pixdata << 8) | m_blitter_remap[space.read_byte(source)];
blit_pixel(space, dest, (pixdata >> 4) & 0xff, controlbyte);
}