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/*
* vicii-color.c - Colors for the MOS 6569 (VIC-II) emulation.
*
* Written by
* John Selck <graham@cruise.de>
*
* Research about the YUV values by
* Philip Timmermann <pepto@pepto.de>
* John Selck <graham@cruise.de>
*
* This file is part of VICE, the Versatile Commodore Emulator.
* See README for copyright notice.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA.
*
*/
#include "vice.h"
#include "viciitypes.h"
#include "vicii-color.h"
#include "vicii-resources.h"
#include "video.h"
/* base saturation of all colors except the grey tones */
#define VICII_SATURATION 48.0f
/* phase shift of all colors */
#define VICII_PHASE -4.5f
/* chroma angles in UV space */
#define ANGLE_RED 112.5f
#define ANGLE_GRN -135.0f
#define ANGLE_BLU 0.0f
#define ANGLE_ORN -45.0f /* negative orange (orange is at +135.0 degree)
*/
#define ANGLE_BRN 157.5f
/* new luminances */
#define LUMN0 0.0f
#define LUMN1 56.0f
#define LUMN2 74.0f
#define LUMN3 92.0f
#define LUMN4 117.0f
#define LUMN5 128.0f
#define LUMN6 163.0f
#define LUMN7 199.0f
#define LUMN8 256.0f
/* old luminances */
#define LUMO0 0.0f
#define LUMO1 56.0f
#define LUMO2 128.0f
#define LUMO3 191.0f
#define LUMO4 256.0f
/* default dithering */
/*
static char vicii_color_dither[16] =
{
0x00,0x0E,0x04,0x0C,
0x08,0x04,0x04,0x0C,
0x04,0x04,0x08,0x04,
0x08,0x08,0x08,0x0C
};
*/
/* very old vic-ii palette with less luminances */
static video_cbm_color_t vicii_colors_old[VICII_NUM_COLORS] =
{
{ LUMO0, ANGLE_ORN, -0, "Black" },
{ LUMO4, ANGLE_BRN, 0, "White" },
{ LUMO1, ANGLE_RED, 1, "Red" },
{ LUMO3, ANGLE_RED, -1, "Cyan" },
{ LUMO2, ANGLE_GRN, -1, "Purple" },
{ LUMO2, ANGLE_GRN, 1, "Green" },
{ LUMO1, ANGLE_BLU, 1, "Blue" },
{ LUMO3, ANGLE_BLU, -1, "Yellow" },
{ LUMO2, ANGLE_ORN, -1, "Orange" },
{ LUMO1, ANGLE_BRN, 1, "Brown" },
{ LUMO2, ANGLE_RED, 1, "Light Red" },
{ LUMO1, ANGLE_RED, -0, "Dark Grey" },
{ LUMO2, ANGLE_GRN, -0, "Medium Grey" },
{ LUMO3, ANGLE_GRN, 1, "Light Green" },
{ LUMO2, ANGLE_BLU, 1, "Light Blue" },
{ LUMO3, ANGLE_BLU, -0, "Light Grey" }
};
static video_cbm_palette_t vicii_palette_old =
{
VICII_NUM_COLORS,
vicii_colors_old,
VICII_SATURATION,
VICII_PHASE
};
/* the wellknown vic-ii palette used for 99% of all vic-ii chips */
static video_cbm_color_t vicii_colors[VICII_NUM_COLORS] =
{
{ LUMN0, ANGLE_ORN, -0, "Black" },
{ LUMN8, ANGLE_BRN, 0, "White" },
{ LUMN2, ANGLE_RED, 1, "Red" },
{ LUMN6, ANGLE_RED, -1, "Cyan" },
{ LUMN3, ANGLE_GRN, -1, "Purple" },
{ LUMN5, ANGLE_GRN, 1, "Green" },
{ LUMN1, ANGLE_BLU, 1, "Blue" },
{ LUMN7, ANGLE_BLU, -1, "Yellow" },
{ LUMN3, ANGLE_ORN, -1, "Orange" },
{ LUMN1, ANGLE_BRN, 1, "Brown" },
{ LUMN5, ANGLE_RED, 1, "Light Red" },
{ LUMN2, ANGLE_RED, -0, "Dark Grey" },
{ LUMN4, ANGLE_GRN, -0, "Medium Grey" },
{ LUMN7, ANGLE_GRN, 1, "Light Green" },
{ LUMN4, ANGLE_BLU, 1, "Light Blue" },
{ LUMN6, ANGLE_BLU, -0, "Light Grey" }
};
static video_cbm_palette_t vicii_palette =
{
VICII_NUM_COLORS,
vicii_colors,
VICII_SATURATION,
VICII_PHASE
};
int vicii_color_update_palette(struct video_canvas_s *canvas)
{
video_cbm_palette_t *cp;
if (vicii_resources.new_luminances)
cp = &vicii_palette;
else
cp = &vicii_palette_old;
video_color_palette_internal(canvas, cp);
return video_color_update_palette(canvas);
}
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