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improved spot

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This commit is contained in:
Michaël Banaan Ananas 2011-10-30 04:44:43 +00:00
parent 545b313b5a
commit 2b5288fdcc
1 changed files with 38 additions and 18 deletions
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56
src/mame/video/namcos22.c
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@ -119,7 +119,7 @@ static struct
int gFadeColor;
int bFadeColor;
int fadeFactor;
int spot_length;
int spot_limit;
int poly_translucency;
int palBase;
} mixer;
@ -169,8 +169,8 @@ UpdateVideoMixer( running_machine &machine )
08,09,0a background color
0b
0c
0d amount of pens for spot
0e
0d spot factor limit value
0e enable spot factor limit
0f
10
11 global polygon alpha factor
@ -192,7 +192,7 @@ UpdateVideoMixer( running_machine &machine )
mixer.rFogColor = nthbyte( state->m_gamma, 0x05 );
mixer.gFogColor = nthbyte( state->m_gamma, 0x06 );
mixer.bFogColor = nthbyte( state->m_gamma, 0x07 );
mixer.spot_length = nthbyte( state->m_gamma, 0x0d );
mixer.spot_limit = nthbyte( state->m_gamma, 0x0d );
mixer.poly_translucency = nthbyte( state->m_gamma, 0x11 );
mixer.rFadeColor = nthbyte( state->m_gamma, 0x16 );
mixer.gFadeColor = nthbyte( state->m_gamma, 0x17 );
@ -200,6 +200,11 @@ UpdateVideoMixer( running_machine &machine )
mixer.fadeFactor = nthbyte( state->m_gamma, 0x19 );
mixer.flags = nthbyte( state->m_gamma, 0x1a );
mixer.palBase = nthbyte( state->m_gamma, 0x1b ) & 0x7f;
// put spot-specific flags into high word
mixer.flags |= state->m_spot_enable << 16;
mixer.flags |= (nthbyte(state->m_gamma, 0x0e) & 1) << 17;
mixer.flags |= (state->m_chipselect & 0xc000) << 4;
}
else
{
@ -1891,7 +1896,7 @@ is the high byte of each word used? it's usually 00, and in dirtdash always 02
low byte of each word:
byte 0 looks like a blend factor
bytes 1,2,3 may be other blend factor tables? (4 in total, like czram, selected where?), or an rgb triplet? (used how?)
bytes 1,2,3 a secondary brightness factor per rgb channel
*/
@ -1950,17 +1955,21 @@ static void namcos22s_mix_textlayer( running_machine &machine, bitmap_t *bitmap,
UINT8 *pri;
int x,y;
// prepare fader and alpha and spot
// prepare alpha
UINT8 alpha_check12 = nthbyte(state->m_gamma, 0x12);
UINT8 alpha_check13 = nthbyte(state->m_gamma, 0x13);
UINT8 alpha_mask = nthbyte(state->m_gamma, 0x14);
UINT8 alpha_factor = nthbyte(state->m_gamma, 0x15);
int spot_length = mixer.spot_length;
bool spot_enabled = spot_length && state->m_spot_enable && state->m_chipselect&0xc000;
bool fade_enabled = mixer.flags&2 && mixer.fadeFactor;
int spot_factor, fade_factor = 0xff - mixer.fadeFactor;
rgbint fade_color;
UINT8 alpha_mask = nthbyte(state->m_gamma, 0x14);
UINT8 alpha_factor = nthbyte(state->m_gamma, 0x15);
// prepare spot
int spot_flags = mixer.flags >> 16;
bool spot_enabled = spot_flags&1 && spot_flags&0xc;
int spot_limit = (spot_flags&2) ? mixer.spot_limit : 0xff;
// prepare fader
bool fade_enabled = mixer.flags&2 && mixer.fadeFactor;
int fade_factor = 0xff - mixer.fadeFactor;
rgbint fade_color;
rgb_comp_to_rgbint(&fade_color, mixer.rFadeColor, mixer.gFadeColor, mixer.bFadeColor);
// mix textlayer with poly/sprites
@ -1993,14 +2002,25 @@ static void namcos22s_mix_textlayer( running_machine &machine, bitmap_t *bitmap,
if (spot_enabled)
{
UINT8 pen = src[x]&0xff;
if (pen < spot_length && (spot_factor = state->m_spotram[pen*4]) != 0)
rgbint mix;
rgb_to_rgbint(&mix, dest[x]);
if (spot_flags & 8)
{
rgbint mix;
rgb_to_rgbint(&mix, dest[x]);
rgbint_blend(&rgb, &mix, 0xff - spot_factor);
// mix with per-channel brightness
rgbint shade;
rgb_comp_to_rgbint(&shade,
(0xff - (state->m_spotram[pen<<2|1] & 0xff)) << 2,
(0xff - (state->m_spotram[pen<<2|2] & 0xff)) << 2,
(0xff - (state->m_spotram[pen<<2|3] & 0xff)) << 2
);
rgbint_scale_channel_and_clamp(&mix, &shade);
}
int spot_factor = 0xff - (state->m_spotram[pen<<2] & 0xff);
if (spot_factor < spot_limit)
rgbint_blend(&rgb, &mix, spot_factor);
}
if (fade_enabled)
rgbint_blend(&rgb, &fade_color, fade_factor);