/****************************************************************************** emupal.c Emulator palette handling functions. Copyright Nicola Salmoria and the MAME Team. Visit http://mamedev.org for licensing and usage restrictions. ******************************************************************************/ #include "driver.h" #define VERBOSE 0 /*************************************************************************** CONSTANTS ***************************************************************************/ #define PEN_BRIGHTNESS_BITS 8 #define MAX_PEN_BRIGHTNESS (4 << PEN_BRIGHTNESS_BITS) #define MAX_SHADOW_PRESETS 4 /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ /* information about a shadow table */ typedef struct _shadow_table_data shadow_table_data; struct _shadow_table_data { UINT32 * base; /* pointer to the base of the table */ INT16 dr; /* delta red value */ INT16 dg; /* delta green value */ INT16 db; /* delta blue value */ UINT8 noclip; /* clip? */ }; /* typedef struct _palette_private palette_private; */ struct _palette_private { bitmap_format format; /* format assumed for palette data */ UINT32 shadow_group; /* index of the shadow group, or 0 if none */ UINT32 hilight_group; /* index of the hilight group, or 0 if none */ pen_t black_pen; /* precomputed black pen value */ pen_t white_pen; /* precomputed white pen value */ shadow_table_data shadow_table[MAX_SHADOW_PRESETS]; /* array of shadow table data */ pen_t * save_pen; /* pens for save/restore */ float * save_bright; /* brightness for save/restore */ }; /* typedef struct _colortable_t colortable_t; */ struct _colortable_t { running_machine * machine; /* associated machine */ UINT32 entries; /* number of entries */ UINT32 palentries; /* number of palette entries */ UINT16 * raw; /* raw data about each entry */ rgb_t * palette; /* palette entries */ }; /*************************************************************************** FUNCTION PROTOTYPES ***************************************************************************/ static void palette_presave(running_machine *machine, void *param); static void palette_postload(running_machine *machine, void *param); static void palette_exit(running_machine *machine); static void allocate_palette(running_machine *machine, palette_private *palette); static void allocate_color_tables(running_machine *machine, palette_private *palette); static void allocate_shadow_tables(running_machine *machine, palette_private *palette); static void configure_rgb_shadows(running_machine *machine, int mode, float factor); /*************************************************************************** INITIALIZATION AND CONFIGURATION ***************************************************************************/ /*------------------------------------------------- palette_init - palette initialization that takes place before the display is created -------------------------------------------------*/ void palette_init(running_machine *machine) { palette_private *palette = auto_alloc_clear(machine, palette_private); const device_config *device = video_screen_first(machine->config); bitmap_format format; /* get the format from the first screen, or use BITMAP_FORMAT_INVALID, if screenless */ if (device != NULL) { screen_config *config = (screen_config *)device->inline_config; format = config->format; } else format = BITMAP_FORMAT_INVALID; /* request cleanup */ machine->palette_data = palette; add_exit_callback(machine, palette_exit); /* reset all our data */ palette->format = format; /* determine the color mode */ switch (format) { case BITMAP_FORMAT_INDEXED16: case BITMAP_FORMAT_RGB15: case BITMAP_FORMAT_RGB32: /* indexed and RGB modes are fine for everything */ break; case BITMAP_FORMAT_INVALID: /* invalid format means no palette - or at least it should */ assert(machine->config->total_colors == 0); return; default: fatalerror("Unsupported screen bitmap format!"); break; } /* allocate all the data structures */ if (machine->config->total_colors > 0) { int numcolors; allocate_palette(machine, palette); allocate_color_tables(machine, palette); allocate_shadow_tables(machine, palette); /* set up save/restore of the palette */ numcolors = palette_get_num_colors(machine->palette); palette->save_pen = auto_alloc_array(machine, pen_t, numcolors); palette->save_bright = auto_alloc_array(machine, float, numcolors); state_save_register_global_pointer(machine, palette->save_pen, numcolors); state_save_register_global_pointer(machine, palette->save_bright, numcolors); state_save_register_presave(machine, palette_presave, palette); state_save_register_postload(machine, palette_postload, palette); } } /*************************************************************************** SHADOW/HIGHLIGHT CONFIGURATION ***************************************************************************/ /*------------------------------------------------- palette_set_shadow_factor - set the global shadow brightness factor -------------------------------------------------*/ void palette_set_shadow_factor(running_machine *machine, double factor) { palette_private *palette = machine->palette_data; assert(palette->shadow_group != 0); palette_group_set_contrast(machine->palette, palette->shadow_group, factor); } /*------------------------------------------------- palette_set_highlight_factor - set the global highlight brightness factor -------------------------------------------------*/ void palette_set_highlight_factor(running_machine *machine, double factor) { palette_private *palette = machine->palette_data; assert(palette->hilight_group != 0); palette_group_set_contrast(machine->palette, palette->hilight_group, factor); } /*************************************************************************** SHADOW TABLE CONFIGURATION ***************************************************************************/ /*------------------------------------------------- palette_set_shadow_mode(mode) mode: 0 = use preset 0 (default shadow) 1 = use preset 1 (default highlight) 2 = use preset 2 * 3 = use preset 3 * * Preset 2 & 3 work independently under 32bpp, supporting up to four different types of shadows at one time. They mirror preset 1 & 2 in lower depth settings to maintain compatibility. palette_set_shadow_dRGB32(mode, dr, dg, db, noclip) mode: 0 to 3 (which preset to configure) dr: -255 to 255 ( red displacement ) dg: -255 to 255 ( green displacement ) db: -255 to 255 ( blue displacement ) noclip: 0 = resultant RGB clipped at 0x00/0xff 1 = resultant RGB wraparound 0x00/0xff * Color shadows only work under 32bpp. This function has no effect in lower color depths where palette_set_shadow_factor() or palette_set_highlight_factor() should be used instead. * 32-bit shadows are lossy. Even with zero RGB displacements the affected area will still look slightly darkened. Drivers should ensure all shadow pens in gfx_drawmode_table[] are set to DRAWMODE_NONE when RGB displacements are zero to avoid the darkening effect. -------------------------------------------------*/ /*------------------------------------------------- palette_set_shadow_mode - select 1 of 4 different live shadow tables -------------------------------------------------*/ void palette_set_shadow_mode(running_machine *machine, int mode) { palette_private *palette = machine->palette_data; assert(mode >= 0 && mode < MAX_SHADOW_PRESETS); machine->shadow_table = palette->shadow_table[mode].base; } /*------------------------------------------------- palette_set_shadow_dRGB32 - configure delta RGB values for 1 of 4 shadow tables -------------------------------------------------*/ void palette_set_shadow_dRGB32(running_machine *machine, int mode, int dr, int dg, int db, int noclip) { palette_private *palette = machine->palette_data; shadow_table_data *stable = &palette->shadow_table[mode]; int i; /* only applies to RGB direct modes */ assert(palette->format != BITMAP_FORMAT_INDEXED16); assert(stable->base != NULL); /* clamp the deltas (why?) */ if (dr < -0xff) dr = -0xff; else if (dr > 0xff) dr = 0xff; if (dg < -0xff) dg = -0xff; else if (dg > 0xff) dg = 0xff; if (db < -0xff) db = -0xff; else if (db > 0xff) db = 0xff; /* early exit if nothing changed */ if (dr == stable->dr && dg == stable->dg && db == stable->db && noclip == stable->noclip) return; stable->dr = dr; stable->dg = dg; stable->db = db; stable->noclip = noclip; if (VERBOSE) popmessage("shadow %d recalc %d %d %d %02x", mode, dr, dg, db, noclip); /* regenerate the table */ for (i = 0; i < 32768; i++) { int r = pal5bit(i >> 10) + dr; int g = pal5bit(i >> 5) + dg; int b = pal5bit(i >> 0) + db; pen_t final; /* apply clipping */ if (!noclip) { r = rgb_clamp(r); g = rgb_clamp(g); b = rgb_clamp(b); } final = MAKE_RGB(r, g, b); /* store either 16 or 32 bit */ if (palette->format == BITMAP_FORMAT_RGB32) stable->base[i] = final; else stable->base[i] = rgb_to_rgb15(final); } } /*************************************************************************** COLORTABLE MANAGEMENT ***************************************************************************/ /*------------------------------------------------- colortable_alloc - allocate a new colortable with the given number of entries -------------------------------------------------*/ colortable_t *colortable_alloc(running_machine *machine, UINT32 palettesize) { colortable_t *ctable; UINT32 index; assert(machine != NULL); assert(machine->config != NULL); assert(palettesize > 0); /* allocate the colortable */ ctable = auto_alloc_clear(machine, colortable_t); /* fill in the basics */ ctable->machine = machine; ctable->entries = machine->config->total_colors; ctable->palentries = palettesize; /* allocate the raw colortable */ ctable->raw = auto_alloc_array(machine, UINT16, ctable->entries); for (index = 0; index < ctable->entries; index++) ctable->raw[index] = index % ctable->palentries; state_save_register_global_pointer(machine, ctable->raw, ctable->entries); /* allocate the palette */ ctable->palette = auto_alloc_array(machine, rgb_t, ctable->palentries); for (index = 0; index < ctable->palentries; index++) ctable->palette[index] = MAKE_ARGB(0x80,0xff,0xff,0xff); state_save_register_global_pointer(machine, ctable->palette, ctable->palentries); return ctable; } /*------------------------------------------------- colortable_entry_set_value - set the value of a colortable entry -------------------------------------------------*/ void colortable_entry_set_value(colortable_t *ctable, UINT32 entry, UINT16 value) { /* ensure values are within range */ assert(ctable != NULL); assert(entry < ctable->entries); assert(value < ctable->palentries); /* update if it has changed */ if (ctable->raw[entry] != value) { ctable->raw[entry] = value; palette_set_color(ctable->machine, entry, ctable->palette[value]); } } /*------------------------------------------------- colortable_entry_get_value - return the value of a colortable entry -------------------------------------------------*/ UINT16 colortable_entry_get_value(colortable_t *ctable, UINT32 entry) { assert(ctable != NULL); assert(entry < ctable->entries); return ctable->raw[entry]; } /*------------------------------------------------- colortable_palette_set_color - change the color of a colortable palette entry -------------------------------------------------*/ void colortable_palette_set_color(colortable_t *ctable, UINT32 entry, rgb_t color) { /* ensure values are within range */ assert(ctable != NULL); assert(entry < ctable->palentries); /* alpha doesn't matter */ color &= 0xffffff; /* update if it has changed */ if (ctable->palette[entry] != color) { UINT32 index; ctable->palette[entry] = color; /* update the palette for any colortable entries that reference it */ for (index = 0; index < ctable->entries; index++) if (ctable->raw[index] == entry) palette_set_color(ctable->machine, index, color); } } /*------------------------------------------------- colortable_entry_get_value - return the color of a colortable palette entry -------------------------------------------------*/ rgb_t colortable_palette_get_color(colortable_t *ctable, UINT32 entry) { assert(ctable != NULL); assert(entry < ctable->palentries); return ctable->palette[entry]; } /*------------------------------------------------- colortable_get_transpen_mask - return a 32-bit transparency mask for a given gfx element and color -------------------------------------------------*/ UINT32 colortable_get_transpen_mask(colortable_t *ctable, const gfx_element *gfx, int color, int transcolor) { UINT32 entry = gfx->color_base + (color % gfx->total_colors) * gfx->color_granularity; UINT32 mask = 0; UINT32 count, bit; /* make sure we are in range */ assert(ctable != NULL); assert(entry < ctable->entries); assert(gfx->color_depth <= 32); /* either gfx->color_depth entries or as many as we can get up until the end */ count = MIN(gfx->color_depth, ctable->entries - entry); /* set a bit anywhere the transcolor matches */ for (bit = 0; bit < count; bit++) if (ctable->raw[entry++] == transcolor) mask |= 1 << bit; /* return the final mask */ return mask; } /*------------------------------------------------- colortable_configure_tilemap_groups - configure groups in a tilemap to represent transparency based on colortable entries (each group maps to a gfx color) -------------------------------------------------*/ void colortable_configure_tilemap_groups(colortable_t *ctable, tilemap *tmap, const gfx_element *gfx, int transcolor) { int color; assert(ctable != NULL); assert(gfx != NULL); assert(tmap != NULL); assert(gfx->total_colors <= TILEMAP_NUM_GROUPS); /* iterate over all colors in the tilemap */ for (color = 0; color < gfx->total_colors; color++) tilemap_set_transmask(tmap, color, colortable_get_transpen_mask(ctable, gfx, color, transcolor), 0); } /*------------------------------------------------- colortable_palette_get_size - return the number of entries in a colortable -------------------------------------------------*/ UINT32 colortable_palette_get_size(colortable_t *ctable) { assert(ctable != NULL); return ctable->palentries; } /*************************************************************************** UTILITIES ***************************************************************************/ /*------------------------------------------------- get_black_pen - return the pen for a fixed black color -------------------------------------------------*/ pen_t get_black_pen(running_machine *machine) { palette_private *palette = machine->palette_data; return palette->black_pen; } /*------------------------------------------------- get_white_pen - return the pen for a fixed white color -------------------------------------------------*/ pen_t get_white_pen(running_machine *machine) { palette_private *palette = machine->palette_data; return palette->white_pen; } /*************************************************************************** INTERNAL FUNCTIONS ***************************************************************************/ /*------------------------------------------------- palette_presave - prepare the save arrays for saving -------------------------------------------------*/ static void palette_presave(running_machine *machine, void *param) { int numcolors = palette_get_num_colors(machine->palette); palette_private *palette = (palette_private *)param; int index; /* fill the save arrays with updated pen and brightness information */ for (index = 0; index < numcolors; index++) { palette->save_pen[index] = palette_entry_get_color(machine->palette, index); palette->save_bright[index] = palette_entry_get_contrast(machine->palette, index); } } /*------------------------------------------------- palette_postload - called after restore to actually update the palette -------------------------------------------------*/ static void palette_postload(running_machine *machine, void *param) { int numcolors = palette_get_num_colors(machine->palette); palette_private *palette = (palette_private *)param; int index; /* reset the pen and brightness for each entry */ for (index = 0; index < numcolors; index++) { palette_entry_set_color(machine->palette, index, palette->save_pen[index]); palette_entry_set_contrast(machine->palette, index, palette->save_bright[index]); } } /*------------------------------------------------- palette_exit - free any allocated memory -------------------------------------------------*/ static void palette_exit(running_machine *machine) { /* dereference the palette */ if (machine->palette != NULL) palette_deref(machine->palette); } /*------------------------------------------------- allocate_palette - allocate and configure the palette object itself -------------------------------------------------*/ static void allocate_palette(running_machine *machine, palette_private *palette) { int numgroups, index; /* determine the number of groups we need */ numgroups = 1; if (machine->config->video_attributes & VIDEO_HAS_SHADOWS) palette->shadow_group = numgroups++; if (machine->config->video_attributes & VIDEO_HAS_HIGHLIGHTS) palette->hilight_group = numgroups++; assert_always(machine->config->total_colors * numgroups <= 65536, "Error: palette has more than 65536 colors."); /* allocate a palette object containing all the colors and groups */ machine->palette = palette_alloc(machine->config->total_colors, numgroups); assert_always(machine->palette != NULL, "Failed to allocate system palette"); /* configure the groups */ if (palette->shadow_group != 0) palette_group_set_contrast(machine->palette, palette->shadow_group, (float)PALETTE_DEFAULT_SHADOW_FACTOR); if (palette->hilight_group != 0) palette_group_set_contrast(machine->palette, palette->hilight_group, (float)PALETTE_DEFAULT_HIGHLIGHT_FACTOR); /* set the initial colors to a standard rainbow */ for (index = 0; index < machine->config->total_colors; index++) palette_entry_set_color(machine->palette, index, MAKE_RGB(pal1bit(index >> 0), pal1bit(index >> 1), pal1bit(index >> 2))); /* switch off the color mode */ switch (palette->format) { /* 16-bit paletteized case */ case BITMAP_FORMAT_INDEXED16: palette->black_pen = palette_get_black_entry(machine->palette); palette->white_pen = palette_get_white_entry(machine->palette); if (palette->black_pen >= 65536) palette->black_pen = 0; if (palette->white_pen >= 65536) palette->white_pen = 65536; break; /* 15-bit direct case */ case BITMAP_FORMAT_RGB15: palette->black_pen = rgb_to_rgb15(MAKE_RGB(0x00,0x00,0x00)); palette->white_pen = rgb_to_rgb15(MAKE_RGB(0xff,0xff,0xff)); break; /* 32-bit direct case */ case BITMAP_FORMAT_RGB32: palette->black_pen = MAKE_RGB(0x00,0x00,0x00); palette->white_pen = MAKE_RGB(0xff,0xff,0xff); break; /* screenless case */ case BITMAP_FORMAT_INVALID: default: break; } } /*------------------------------------------------- allocate_color_tables - allocate memory for pen and color tables -------------------------------------------------*/ static void allocate_color_tables(running_machine *machine, palette_private *palette) { int total_colors = palette_get_num_colors(machine->palette) * palette_get_num_groups(machine->palette); pen_t *pentable; int i; /* allocate memory for the pen table */ switch (palette->format) { case BITMAP_FORMAT_INDEXED16: /* create a dummy 1:1 mapping */ machine->pens = pentable = auto_alloc_array(machine, pen_t, total_colors + 2); for (i = 0; i < total_colors + 2; i++) pentable[i] = i; break; case BITMAP_FORMAT_RGB15: machine->pens = palette_entry_list_adjusted_rgb15(machine->palette); break; case BITMAP_FORMAT_RGB32: machine->pens = palette_entry_list_adjusted(machine->palette); break; default: machine->pens = NULL; break; } } /*------------------------------------------------- allocate_shadow_tables - allocate memory for shadow tables -------------------------------------------------*/ static void allocate_shadow_tables(running_machine *machine, palette_private *palette) { /* if we have shadows, allocate shadow tables */ if (machine->config->video_attributes & VIDEO_HAS_SHADOWS) { pen_t *table = auto_alloc_array(machine, pen_t, 65536); int i; /* palettized mode gets a single 64k table in slots 0 and 2 */ if (palette->format == BITMAP_FORMAT_INDEXED16) { palette->shadow_table[0].base = palette->shadow_table[2].base = table; for (i = 0; i < 65536; i++) table[i] = (i < machine->config->total_colors) ? (i + machine->config->total_colors) : i; } /* RGB mode gets two 32k tables in slots 0 and 2 */ else { palette->shadow_table[0].base = table; palette->shadow_table[2].base = table + 32768; configure_rgb_shadows(machine, 0, (float)PALETTE_DEFAULT_SHADOW_FACTOR); } } /* if we have hilights, allocate shadow tables */ if (machine->config->video_attributes & VIDEO_HAS_HIGHLIGHTS) { pen_t *table = auto_alloc_array(machine, pen_t, 65536); int i; /* palettized mode gets a single 64k table in slots 1 and 3 */ if (palette->format == BITMAP_FORMAT_INDEXED16) { palette->shadow_table[1].base = palette->shadow_table[3].base = table; for (i = 0; i < 65536; i++) table[i] = (i < machine->config->total_colors) ? (i + 2 * machine->config->total_colors) : i; } /* RGB mode gets two 32k tables in slots 1 and 3 */ else { palette->shadow_table[1].base = table; palette->shadow_table[3].base = table + 32768; configure_rgb_shadows(machine, 1, (float)PALETTE_DEFAULT_HIGHLIGHT_FACTOR); } } /* set the default table */ machine->shadow_table = palette->shadow_table[0].base; } /*------------------------------------------------- configure_rgb_shadows - configure shadows for the RGB tables -------------------------------------------------*/ static void configure_rgb_shadows(running_machine *machine, int mode, float factor) { palette_private *palette = machine->palette_data; shadow_table_data *stable = &palette->shadow_table[mode]; int ifactor = (int)(factor * 256.0f); int i; /* only applies to RGB direct modes */ assert(palette->format != BITMAP_FORMAT_INDEXED16); assert(stable->base != NULL); /* regenerate the table */ for (i = 0; i < 32768; i++) { UINT8 r = rgb_clamp((pal5bit(i >> 10) * ifactor) >> 8); UINT8 g = rgb_clamp((pal5bit(i >> 5) * ifactor) >> 8); UINT8 b = rgb_clamp((pal5bit(i >> 0) * ifactor) >> 8); pen_t final = MAKE_RGB(r, g, b); /* store either 16 or 32 bit */ if (palette->format == BITMAP_FORMAT_RGB32) stable->base[i] = final; else stable->base[i] = rgb_to_rgb15(final); } }