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path: root/src/devices/bus/nubus/pds30_cb264.cpp
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Diffstat (limited to 'src/devices/bus/nubus/pds30_cb264.cpp')
-rw-r--r--src/devices/bus/nubus/pds30_cb264.cpp55
1 files changed, 23 insertions, 32 deletions
diff --git a/src/devices/bus/nubus/pds30_cb264.cpp b/src/devices/bus/nubus/pds30_cb264.cpp
index aa0ca1df648..388aa5f54d5 100644
--- a/src/devices/bus/nubus/pds30_cb264.cpp
+++ b/src/devices/bus/nubus/pds30_cb264.cpp
@@ -10,6 +10,9 @@
#include "pds30_cb264.h"
#include "screen.h"
+#include <algorithm>
+
+
#define CB264SE30_SCREEN_NAME "cb264_screen"
#define CB264SE30_ROM_REGION "cb264_rom"
@@ -133,21 +136,17 @@ void nubus_cb264se30_device::device_timer(emu_timer &timer, device_timer_id tid,
uint32_t nubus_cb264se30_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[8*1024];
+ uint8_t const *const vram = &m_vram[8*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))];
+ uint8_t const pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))];
*scanline++ = m_palette[(pixels&0x80)];
*scanline++ = m_palette[((pixels<<1)&0x80)];
@@ -162,12 +161,12 @@ uint32_t nubus_cb264se30_device::screen_update(screen_device &screen, bitmap_rgb
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&0xc0)];
*scanline++ = m_palette[((pixels<<2)&0xc0)];
@@ -178,13 +177,12 @@ uint32_t nubus_cb264se30_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);
-
- for (x = 0; x < 640/2; x++)
+ uint32_t *scanline = &bitmap.pix(y);
+ 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&0xf0)];
*scanline++ = m_palette[((pixels&0x0f)<<4)];
@@ -193,13 +191,12 @@ uint32_t nubus_cb264se30_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);
-
- for (x = 0; x < 640; x++)
+ uint32_t *scanline = &bitmap.pix(y);
+ 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];
}
}
@@ -207,17 +204,11 @@ uint32_t nubus_cb264se30_device::screen_update(screen_device &screen, bitmap_rgb
case 4: // 24 bpp
{
- uint32_t *vram32 = (uint32_t *)&m_vram[0];
- uint32_t *base;
+ uint32_t const *const vram32 = (uint32_t *)&m_vram[0];
- 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;