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Diffstat (limited to 'src/devices/bus/nubus/pds30_procolor816.cpp')
-rw-r--r--src/devices/bus/nubus/pds30_procolor816.cpp53
1 files changed, 23 insertions, 30 deletions
diff --git a/src/devices/bus/nubus/pds30_procolor816.cpp b/src/devices/bus/nubus/pds30_procolor816.cpp
index b251a57c33c..83fd8512704 100644
--- a/src/devices/bus/nubus/pds30_procolor816.cpp
+++ b/src/devices/bus/nubus/pds30_procolor816.cpp
@@ -139,21 +139,17 @@ void nubus_procolor816_device::device_timer(emu_timer &timer, device_timer_id ti
uint32_t nubus_procolor816_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];
+ uint8_t const *const vram = &m_vram[4];
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 * 640/8) + (BYTE4_XOR_BE(x))];
+ uint8_t const pixels = vram[(y * 640/8) + (BYTE4_XOR_BE(x))];
*scanline++ = m_palette[(pixels&0x80)];
*scanline++ = m_palette[((pixels<<1)&0x80)];
@@ -168,12 +164,12 @@ uint32_t nubus_procolor816_device::screen_update(screen_device &screen, bitmap_r
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 * 640/4) + (BYTE4_XOR_BE(x))];
+ uint8_t const pixels = vram[(y * 640/4) + (BYTE4_XOR_BE(x))];
*scanline++ = m_palette[(pixels&0xc0)];
*scanline++ = m_palette[((pixels<<2)&0xc0)];
@@ -184,13 +180,12 @@ uint32_t nubus_procolor816_device::screen_update(screen_device &screen, bitmap_r
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 * 640/2) + (BYTE4_XOR_BE(x))];
+ uint8_t const pixels = vram[(y * 640/2) + (BYTE4_XOR_BE(x))];
*scanline++ = m_palette[(pixels&0xf0)];
*scanline++ = m_palette[((pixels&0x0f)<<4)];
@@ -199,13 +194,12 @@ uint32_t nubus_procolor816_device::screen_update(screen_device &screen, bitmap_r
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 * 640) + (BYTE4_XOR_BE(x))];
+ uint8_t const pixels = vram[(y * 640) + (BYTE4_XOR_BE(x))];
*scanline++ = m_palette[pixels];
}
}
@@ -213,16 +207,15 @@ uint32_t nubus_procolor816_device::screen_update(screen_device &screen, bitmap_r
case 4: // 15 bpp
{
- uint16_t *vram16 = (uint16_t *)&m_vram[0];
- uint16_t pixels;
+ uint16_t const *const vram16 = (uint16_t *)&m_vram[0];
- 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 = vram16[(y * 640) + (x^1)];
- *scanline++ = rgb_t(((pixels>>10) & 0x1f)<<3, ((pixels>>5) & 0x1f)<<3, (pixels & 0x1f)<<3);
+ uint16_t const pixels = vram16[(y * 640) + BYTE_XOR_BE(x)];
+ *scanline++ = rgb_t(pal5bit((pixels>>10) & 0x1f), pal5bit((pixels>>5) & 0x1f), pal5bit(pixels & 0x1f));
}
}
}