Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-21 07:52:35 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

namcos22: optimization to gamma mix for non-super system22

Browse Source
This commit is contained in:
hap 2016-03-30 14:33:18 +02:00
parent cde67e639a
commit 4c08395ada
1 changed files with 12 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
src/mame/video/namcos22.cpp
View File

@ -1954,6 +1954,10 @@ void namcos22_state::namcos22_mix_text_layer(screen_device &screen, bitmap_rgb32
UINT32 *dest;
UINT8 *pri;
const UINT8 *rlut = &m_gamma_proms[0x000];
const UINT8 *glut = &m_gamma_proms[0x100];
const UINT8 *blut = &m_gamma_proms[0x200];
// prepare fader and shadow factor
bool fade_enabled = m_mixer_flags & 2 && m_poly_fade_enabled;
bool shadow_enabled = (m_mixer_flags & 0x100) != 0; // ? (ridgerac is the only game not using shadow)
@ -1973,6 +1977,8 @@ void namcos22_state::namcos22_mix_text_layer(screen_device &screen, bitmap_rgb32
pri = &screen.priority().pix8(y);
for (int x = cliprect.min_x; x <= cliprect.max_x; x++)
{
UINT32 pixel = dest[x];
// skip if transparent or under poly
if (pri[x] == 2)
{
@ -1985,7 +1991,7 @@ void namcos22_state::namcos22_mix_text_layer(screen_device &screen, bitmap_rgb32
case 0xfe:
if (shadow_enabled)
{
rgb.set(dest[x]);
rgb.set(pixel);
rgb.scale_and_clamp(rgb_mix[(src[x] & 0xf) - 0xc]);
break;
}
@ -2004,8 +2010,11 @@ void namcos22_state::namcos22_mix_text_layer(screen_device &screen, bitmap_rgb32
// eg. a rr-gg-bb of 3f-7f-00 will fade to ff-ff-00 and not ff-ff-ff
// seen in victlapw attract mode
dest[x] = rgb.to_rgba();
pixel = rgb.to_rgba();
}
// final mix gamma here
dest[x] = (rlut[(pixel >> 16) & 0xff] << 16) | (glut[(pixel >> 8) & 0xff] << 8) | blut[pixel & 0xff];
}
}
}
@ -2333,24 +2342,7 @@ UINT32 namcos22_state::screen_update_namcos22(screen_device &screen, bitmap_rgb3
// layers
draw_polygons(bitmap);
m_poly->render_scene(screen, bitmap);
draw_text_layer(screen, bitmap, cliprect);
// apply gamma
const UINT8 *rlut = &m_gamma_proms[0x000];
const UINT8 *glut = &m_gamma_proms[0x100];
const UINT8 *blut = &m_gamma_proms[0x200];
for (int y = cliprect.min_y; y <= cliprect.max_y; y++)
{
UINT32 *dest = &bitmap.pix32(y);
for (int x = cliprect.min_x; x <= cliprect.max_x; x++)
{
int rgb = dest[x];
int r = rlut[(rgb >> 16) & 0xff];
int g = glut[(rgb >> 8) & 0xff];
int b = blut[rgb & 0xff];
dest[x] = (r << 16) | (g << 8) | b;
}
}
draw_text_layer(screen, bitmap, cliprect); // text layer + final mix(gamma)
return 0;
}