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This commit is contained in:
David Haywood 2015-06-27 22:14:27 +01:00
parent fd61fbcdb2
commit 770d93fa48
2 changed files with 46 additions and 37 deletions
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1
src/mame/includes/segas32.h
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@ -224,6 +224,7 @@ public:
void scross_sw1_output( int which, UINT16 data );
void scross_sw2_output( int which, UINT16 data );
int compute_clipping_extents(screen_device &screen, int enable, int clipout, int clipmask, const rectangle &cliprect, struct extents_list *list);
void compute_tilemap_flips(int bgnum, int &flipx, int &flipy);
void update_tilemap_zoom(screen_device &screen, struct layer_info *layer, const rectangle &cliprect, int bgnum);
void update_tilemap_rowscroll(screen_device &screen, struct layer_info *layer, const rectangle &cliprect, int bgnum);
void update_tilemap_text(screen_device &screen, struct layer_info *layer, const rectangle &cliprect);

82
src/mame/video/segas32.c
View File

@ -832,6 +832,23 @@ int segas32_state::compute_clipping_extents(screen_device &screen, int enable, i
}
void segas32_state::compute_tilemap_flips(int bgnum, int &flipx, int &flipy)
{
/* determine if we're flipped */
int global_flip = (m_system32_videoram[0x1ff00 / 2] >> 9)&1;
flipx = global_flip;
flipy = global_flip;
int layer_flip = (m_system32_videoram[0x1ff00 / 2] >> bgnum) & 1;
flipy ^= layer_flip;
flipx ^= layer_flip;
// this bit is set on Air Rescue (screen 2) title screen, during the Air Rescue introduction demo, and in f1en when you win a single player race
// it seems to prohibit (at least) the per-tilemap y flipping (maybe global y can override it)
if ((m_system32_videoram[0x1ff00 / 2] >> 8) & 1) flipy = 0;
}
/*************************************
*
@ -881,20 +898,10 @@ void segas32_state::update_tilemap_zoom(screen_device &screen, struct segas32_st
//opaque = (m_system32_videoram[0x1ff8e/2] >> (8 + bgnum)) & 1;
//if (screen.machine().input().code_pressed(KEYCODE_Z) && bgnum == 0) opaque = 1;
//if (screen.machine().input().code_pressed(KEYCODE_X) && bgnum == 1) opaque = 1;
int flipx, flipy;
/* determine if we're flipped */
int global_flip = (m_system32_videoram[0x1ff00 / 2] >> 9)&1;
int flipx = global_flip;
int flipy = global_flip;
int layer_flip = (m_system32_videoram[0x1ff00 / 2] >> bgnum) & 1;
flipy ^= layer_flip;
flipx ^= layer_flip;
if ((m_system32_videoram[0x1ff00 / 2] >> 8) & 1) flipy = 0;
// todo determine flipping
compute_tilemap_flips(bgnum, flipx, flipy);
/* determine the clipping */
clipenable = (m_system32_videoram[0x1ff02/2] >> (11 + bgnum)) & 1;
@ -1030,6 +1037,7 @@ void segas32_state::update_tilemap_zoom(screen_device &screen, struct segas32_st
*
*************************************/
void segas32_state::update_tilemap_rowscroll(screen_device &screen, struct segas32_state::layer_info *layer, const rectangle &cliprect, int bgnum)
{
int clipenable, clipout, clips, clipdraw_start;
@ -1040,7 +1048,7 @@ void segas32_state::update_tilemap_rowscroll(screen_device &screen, struct segas
int xscroll, yscroll;
UINT16 *table;
int srcx, srcy;
int flip, opaque;
int opaque;
int x, y;
/* get the tilemaps */
@ -1052,8 +1060,11 @@ void segas32_state::update_tilemap_rowscroll(screen_device &screen, struct segas
//if (screen.machine().input().code_pressed(KEYCODE_C) && bgnum == 2) opaque = 1;
//if (screen.machine().input().code_pressed(KEYCODE_V) && bgnum == 3) opaque = 1;
/* determine if we're flipped */
flip = ((m_system32_videoram[0x1ff00/2] >> 9) ^ (m_system32_videoram[0x1ff00/2] >> bgnum)) & 1;
int flipx, flipy;
// todo determine flipping
compute_tilemap_flips(bgnum, flipx, flipy);
/* determine the clipping */
clipenable = (m_system32_videoram[0x1ff02/2] >> (11 + bgnum)) & 1;
@ -1089,37 +1100,34 @@ void segas32_state::update_tilemap_rowscroll(screen_device &screen, struct segas
int srcxstep;
/* if we're not flipped, things are straightforward */
if (!flip)
if (!flipx)
{
/* get starting scroll values */
srcx = cliprect.min_x + xscroll;
srcxstep = 1;
srcy = yscroll + y;
/* apply row scroll/select */
if (rowscroll)
srcx += table[0x000 + 0x100 * (bgnum - 2) + y] & 0x3ff;
if (rowselect)
srcy = (yscroll + table[0x200 + 0x100 * (bgnum - 2) + y]) & 0x1ff;
srcxstep = 1;
}
else
{
srcx = cliprect.max_x + xscroll;
srcxstep = -1;
}
/* otherwise, we have to do some contortions */
if (!flipy)
{
srcy = yscroll + y;
}
else
{
const rectangle &visarea = screen.visible_area();
/* get starting scroll values */
srcx = cliprect.max_x + xscroll;
srcxstep = -1;
srcy = yscroll + visarea.max_y - y;
/* apply row scroll/select */
if (rowscroll)
srcx += table[0x000 + 0x100 * (bgnum - 2) + y] & 0x3ff;
if (rowselect)
srcy = (yscroll + table[0x200 + 0x100 * (bgnum - 2) + y]) & 0x1ff;
}
/* apply row scroll/select */
if (rowscroll)
srcx += table[0x000 + 0x100 * (bgnum - 2) + y] & 0x3ff;
if (rowselect)
srcy = (yscroll + table[0x200 + 0x100 * (bgnum - 2) + y]) & 0x1ff;
/* look up the pages and get their source pixmaps */
bitmap_ind16 &tm0 = tilemaps[((srcy >> 7) & 2) + 0]->pixmap();
bitmap_ind16 &tm1 = tilemaps[((srcy >> 7) & 2) + 1]->pixmap();