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fix for building with visual studio (which doesn't support gcc extension "?:"), simplify code & make spacing consistent. (nw)

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smf- 2017-01-22 15:04:00 +00:00 committed by Vas Crabb
parent edf64df1db
commit d979105929
1 changed files with 24 additions and 25 deletions
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49
src/mame/drivers/laserbas.cpp
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@ -141,42 +141,41 @@ TIMER_DEVICE_CALLBACK_MEMBER( laserbas_state::laserbas_scanline )
MC6845_UPDATE_ROW( laserbas_state::crtc_update_row )
{
int x, x_max, dx, pixaddr;
const rgb_t *palette = m_palette->palette()->entry_list_raw();
uint32_t *p = &bitmap.pix32(y);
int x = 0;
int x_max = 0x100;
int dx = 1;
if (m_flipscreen)
{
y=0x100-y-1-0x20;
dx = -1;
x = 0x100-1;
y = 0xdf - y;
x = 0xff;
x_max = -1;
}
else
{
dx = 1;
x = 0;
x_max = 0x100;
dx = -1;
}
pixaddr=y<<8;
int pixaddr = y << 8;
const rgb_t *palette = m_palette->palette()->entry_list_raw();
uint32_t *b = &bitmap.pix32(y);
while (x != x_max)
{
while ( x != x_max )
{
uint32_t offset = (pixaddr>>1)&0x7fff;
uint8_t p1 = m_vram[offset];
uint8_t p2 = m_vram[offset+0x8000]; // 0x10000 VRAM, two 4 bit layers 0x8000 bytes each
int offset = (pixaddr >> 1) & 0x7fff;
int shift = (pixaddr & 1) * 4; // two 4 bit pixels in one byte
int p1 = (m_vram[offset] >> shift) & 0xf;
int p2 = (m_vram[offset + 0x8000] >> shift) & 0xf; // 0x10000 VRAM, two 4 bit layers 0x8000 bytes each
int p;
uint8_t shift = (pixaddr & 1)?4:0; // two 4 bit pixels in one byte
p1 = (p1>>shift) & 0xf;
p2 = (p2>>shift) & 0xf;
if (p2)
p = p2;
else if (p1)
p = p1 + 16;
else
p = m_bset;
p[x] = palette[p2?:(p1?(p1+16):m_bset)]; // layer 2 | layer 1 | bg pen
b[x] = palette[p];
++pixaddr;
x += dx;
}
pixaddr++;
x += dx;
}
}