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some notes on what is likely the blending control

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This commit is contained in:
David Haywood 2013-02-27 12:14:35 +00:00
parent 5ac080b17e
commit 83719c465f
1 changed files with 45 additions and 5 deletions
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50
src/mame/drivers/coolridr.c
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@ -403,6 +403,7 @@ public:
m_work_queue[1] = osd_work_queue_alloc(WORK_QUEUE_FLAG_HIGH_FREQ);
decode[0].current_object = 0;
decode[1].current_object = 0;
debug_randompal = 8;
}
@ -502,6 +503,8 @@ public:
void sysh1_dma_transfer( address_space &space, UINT16 dma_index );
int debug_randompal;
UINT16 *m_h1_vram;
UINT8 *m_h1_pcg;
UINT16 *m_h1_pal;
@ -707,6 +710,19 @@ UINT32 coolridr_state::screen_update_coolridr(screen_device &screen, bitmap_rgb3
UINT32 coolridr_state::screen_update_coolridr1(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
#if 0
if (screen.machine().input().code_pressed_once(KEYCODE_W))
{
debug_randompal++;
popmessage("%02x",debug_randompal);
}
if (screen.machine().input().code_pressed_once(KEYCODE_Q))
{
debug_randompal--;
popmessage("%02x",debug_randompal);
}
#endif
return screen_update_coolridr(screen,bitmap,cliprect,0);
}
@ -1022,6 +1038,9 @@ TODO: fix anything that isn't text.
*/
#define DRAW_PIX \
if (pix != 0x8000) \
{ \
@ -1142,22 +1161,43 @@ void *coolridr_state::draw_object_threaded(void *param, int threadid)
/************* object->spriteblit[4] *************/
UINT32 blit4_unused = object->spriteblit[4] & 0xf8fefefe;
//UINT32 blit4 = (object->spriteblit[4] & 0x07000000)>>24;
UINT32 blit4_unused = object->spriteblit[4] & 0xf8fefeee;
UINT32 blit4 = (object->spriteblit[4] & 0x07000000)>>24;
//object->zpri = 7-blit4;
// unknown bits in blit word 4 - 00000010 - australia
// unknown bits in blit word 4 - 00000010 - australia (and various other times)
UINT32 blit_flipx = object->spriteblit[4] & 0x00000001;
UINT32 blit_flipy = (object->spriteblit[4] & 0x00000100)>>8;
UINT32 blit_rotate = (object->spriteblit[4] & 0x00010000)>>16;
//UINT32 b4_unk = object->spriteblit[4] & 0x00000010;
if (blit4_unused) printf("unknown bits in blit word %d - %08x\n", 4, blit4_unused);
// ---- -111 ---- ---r ---- ---y ---- ---x
// ---- -111 ---- ---r ---- ---y ---z ---x
// 1 = used bits? (unknown purpose.. might be object colour mode)
// x = x-flip
// y = y-flip
// r = unknown, not used much, occasional object - rotate
// r = rotate 90 degrees
// z = ??? set very occasionally, often at the start of stages, might relate to the clipping done at the same time?
// this might affect blending logic / amount when 0x8000 palette bit is set, and maybe even z-behavior
// 7 = road, player bike etc.? possibly a 'do not blend' (solid) flag of sorts because the road has 0x8000 palette bit set...
// 6 = smoke frome player bike, waves on west indies, waterfalls on niagra, occasional bits of road?
// 5 = clouds
// 4 = shadows and some HUD elements, occassional bit of road, some firework effects, all bg elements in the coolriders of coolriders (including reaper)
// 3 = front coloured jets
// 2 = middle coloured jets
// 1 = last few coloured trails from the jets at the start, occassional bit of road
// 0 = some HUD elements, title screen, tunnels? road during coolriders of.. (this doesn't have 0x8000 set)
// note the road always has 0x8000 bit set in the palette. I *think* this is because they do a gradual blend of some kind between the road types
// see the number of transitional road bits which have various values above set
if (blit4==object->state->debug_randompal)
{
b1colorNumber = object->state->machine().rand()&0xfff;
}
/************* object->spriteblit[6] *************/