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Diffstat (limited to 'src/devices/bus/nubus/pds30_mc30.cpp')
-rw-r--r--src/devices/bus/nubus/pds30_mc30.cpp71
1 files changed, 32 insertions, 39 deletions
diff --git a/src/devices/bus/nubus/pds30_mc30.cpp b/src/devices/bus/nubus/pds30_mc30.cpp
index 20969a5a6b7..87992723319 100644
--- a/src/devices/bus/nubus/pds30_mc30.cpp
+++ b/src/devices/bus/nubus/pds30_mc30.cpp
@@ -13,6 +13,9 @@
#include "pds30_mc30.h"
#include "screen.h"
+#include <algorithm>
+
+
#define XCEEDMC30_SCREEN_NAME "x30hr_screen"
#define XCEEDMC30_ROM_REGION "x30hr_rom"
@@ -135,41 +138,37 @@ void nubus_xceedmc30_device::device_timer(emu_timer &timer, device_timer_id tid,
uint32_t nubus_xceedmc30_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
- uint32_t *scanline;
- int x, y;
- uint8_t pixels, *vram;
-
- vram = &m_vram[4*1024];
+ uint8_t const *const vram = &m_vram[4*1024];
switch (m_mode)
{
case 0: // 1 bpp?
- for (y = 0; y < 480; y++)
+ for (int y = 0; y < 480; y++)
{
- scanline = &bitmap.pix32(y);
- for (x = 0; x < 640/8; x++)
+ uint32_t *scanline = &bitmap.pix(y);
+ for (int x = 0; x < 640/8; x++)
{
- pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))];
-
- *scanline++ = m_palette[(pixels>>7)&1];
- *scanline++ = m_palette[(pixels>>6)&1];
- *scanline++ = m_palette[(pixels>>5)&1];
- *scanline++ = m_palette[(pixels>>4)&1];
- *scanline++ = m_palette[(pixels>>3)&1];
- *scanline++ = m_palette[(pixels>>2)&1];
- *scanline++ = m_palette[(pixels>>1)&1];
- *scanline++ = m_palette[pixels&1];
+ uint8_t const pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))];
+
+ *scanline++ = m_palette[BIT(pixels, 7)];
+ *scanline++ = m_palette[BIT(pixels, 6)];
+ *scanline++ = m_palette[BIT(pixels, 5)];
+ *scanline++ = m_palette[BIT(pixels, 4)];
+ *scanline++ = m_palette[BIT(pixels, 3)];
+ *scanline++ = m_palette[BIT(pixels, 2)];
+ *scanline++ = m_palette[BIT(pixels, 1)];
+ *scanline++ = m_palette[BIT(pixels, 0)];
}
}
break;
case 1: // 2 bpp
- for (y = 0; y < 480; y++)
+ for (int y = 0; y < 480; y++)
{
- scanline = &bitmap.pix32(y);
- for (x = 0; x < 640/4; x++)
+ uint32_t *scanline = &bitmap.pix(y);
+ for (int x = 0; x < 640/4; x++)
{
- pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))];
+ uint8_t const pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))];
*scanline++ = m_palette[((pixels>>6)&3)];
*scanline++ = m_palette[((pixels>>4)&3)];
@@ -180,13 +179,13 @@ uint32_t nubus_xceedmc30_device::screen_update(screen_device &screen, bitmap_rgb
break;
case 2: // 4 bpp
- for (y = 0; y < 480; y++)
+ for (int y = 0; y < 480; y++)
{
- scanline = &bitmap.pix32(y);
+ uint32_t *scanline = &bitmap.pix(y);
- for (x = 0; x < 640/2; x++)
+ for (int x = 0; x < 640/2; x++)
{
- pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))];
+ uint8_t const pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))];
*scanline++ = m_palette[(pixels>>4)];
*scanline++ = m_palette[(pixels&0xf)];
@@ -195,13 +194,13 @@ uint32_t nubus_xceedmc30_device::screen_update(screen_device &screen, bitmap_rgb
break;
case 3: // 8 bpp
- for (y = 0; y < 480; y++)
+ for (int y = 0; y < 480; y++)
{
- scanline = &bitmap.pix32(y);
+ uint32_t *scanline = &bitmap.pix(y);
- for (x = 0; x < 640; x++)
+ for (int x = 0; x < 640; x++)
{
- pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))];
+ uint8_t const pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))];
*scanline++ = m_palette[pixels];
}
}
@@ -209,17 +208,11 @@ uint32_t nubus_xceedmc30_device::screen_update(screen_device &screen, bitmap_rgb
case 4: // 24 bpp
{
- uint32_t *vram32 = (uint32_t *)vram;
- uint32_t *base;
+ uint32_t const *const vram32 = (uint32_t *)vram;
- for (y = 0; y < 480; y++)
+ for (int y = 0; y < 480; y++)
{
- scanline = &bitmap.pix32(y);
- base = &vram32[y * 1024];
- for (x = 0; x < 640; x++)
- {
- *scanline++ = *base++;
- }
+ std::copy_n(&vram32[y * 1024], 640, &bitmap.pix(y));
}
}
break;