mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-12-27 19:51:48 +01:00
~modified RGB565 color palette
This commit is contained in:
ekeeke31
parent
086548476c
commit
9800c00f5a
@ -7,7 +7,7 @@ Genesis Plus GX 1.3.2 (??/??/????) (Eke-Eke)
|
||||
|
||||
* optimized SN76489 core
|
||||
* modified SN76489 cut-off frequency (thanks to Steve Snake)
|
||||
* added SN76489 linear synthesis using Blip Buffer (thanks to Blargg)
|
||||
* modified SN76489 core to use Blip Buffer linear synthesis , Noise channel is now linear averaged (thanks to Blargg)
|
||||
* added an option to boost SN76489 Noise Channel
|
||||
* removed now outdated Gens YM2612 core
|
||||
* improved YM2612 emulation accuracy (SSG-EG, CSM mode...) (thanks to Nemesis for his tests on real hardware)
|
||||
|
||||
751
source/render.c
751
source/render.c
@ -41,34 +41,6 @@ typedef struct
|
||||
uint8 enable;
|
||||
}clip_t;
|
||||
|
||||
/* Function prototypes */
|
||||
static void palette_init(void);
|
||||
static void make_name_lut(void);
|
||||
static uint32 make_lut_bg(uint32 bx, uint32 ax);
|
||||
static uint32 make_lut_obj(uint32 bx, uint32 sx);
|
||||
static uint32 make_lut_bg_ste(uint32 bx, uint32 ax);
|
||||
static uint32 make_lut_obj_ste(uint32 bx, uint32 sx);
|
||||
static uint32 make_lut_bgobj_ste(uint32 bx, uint32 sx);
|
||||
static void color_update_16(int index, uint16 data);
|
||||
#ifndef NGC
|
||||
static void color_update_8(int index, uint16 data);
|
||||
static void color_update_15(int index, uint16 data);
|
||||
static void color_update_32(int index, uint16 data);
|
||||
static inline void remap_8(uint8 *src, uint8 *dst, uint8 *table, int length);
|
||||
static inline void remap_16(uint8 *src, uint16 *dst, uint16 *table, int length);
|
||||
static inline void remap_32(uint8 *src, uint32 *dst, uint32 *table, int length);
|
||||
#else
|
||||
static inline void remap_texture(uint8 *src, uint16 *dst, uint32 tiles);
|
||||
#endif
|
||||
static inline void merge(uint8 *srca, uint8 *srcb, uint8 *dst, uint8 *table, uint32 width);
|
||||
static inline void update_bg_pattern_cache(uint32 index);
|
||||
static inline uint32 get_hscroll(uint32 line);
|
||||
static void render_bg(uint32 line, uint32 width);
|
||||
static void render_bg_im2(uint32 line, uint32 width, uint32 odd);
|
||||
static void render_bg_vs(uint32 line, uint32 width);
|
||||
static void render_obj(uint32 line, uint8 *buf, uint8 *table);
|
||||
static void render_obj_im2(uint32 line, uint32 odd, uint8 *buf, uint8 *table);
|
||||
|
||||
#undef ALIGN_LONG
|
||||
#ifdef ALIGN_LONG
|
||||
/* Or change the names if you depend on these from elsewhere.. */
|
||||
@ -327,10 +299,9 @@ static __inline__ void WRITE_LONG(void *address, uint32 data)
|
||||
*lb++ = table[(*lb << 8) |(*src++ | palette)];
|
||||
.. claiming the result on lb is undefined.
|
||||
So we manually advance lb and use constant offsets into the line buffer.
|
||||
*/
|
||||
|
||||
/* added sprite collision detection:
|
||||
check if non-transparent sprite data has been previously drawn
|
||||
Added sprite collision detection
|
||||
(check if non-transparent sprite data has been previously drawn)
|
||||
*/
|
||||
#define DRAW_SPRITE_TILE \
|
||||
for(i=0; i<8; i++) \
|
||||
@ -340,22 +311,67 @@ static __inline__ void WRITE_LONG(void *address, uint32 data)
|
||||
}
|
||||
|
||||
|
||||
/* Pixel creation macros, input is four bits each */
|
||||
#ifndef NGC
|
||||
|
||||
/* 8:8:8 RGB */
|
||||
#define MAKE_PIXEL_32(r,g,b) ((r) << 20 | (g) << 12 | (b) << 4)
|
||||
|
||||
/* 5:5:5 RGB */
|
||||
#define MAKE_PIXEL_15(r,g,b) ((r) << 11 | (g) << 6 | (b) << 1)
|
||||
|
||||
/* 3:3:2 RGB */
|
||||
#define MAKE_PIXEL_8(r,g,b) ((r) << 5 | (g) << 2 | ((b) >> 1))
|
||||
|
||||
#endif
|
||||
/**************************************************/
|
||||
/* Pixel creation macros */
|
||||
/* Input is four bits each (R,G,B), 12 bits total */
|
||||
/* Color range depends on the S/TE mode: */
|
||||
/* */
|
||||
/* normal mode : xxx0 (0-14) */
|
||||
/* shadow mode : 0xxx (0-7) */
|
||||
/* highlight mode: 1xxx (8-15) */
|
||||
/* */
|
||||
/* with xxx0 = original 4-bits CRAM value */
|
||||
/**************************************************/
|
||||
|
||||
/* 5:6:5 RGB */
|
||||
#define MAKE_PIXEL_16(r,g,b) ((r) << 11 | (g) << 5 | (b))
|
||||
/* This RGB format uses 5 or 6bits color */
|
||||
/* 4 bits color value need to be dithered */
|
||||
/* to match the whole color range: */
|
||||
/* */
|
||||
/* R,B (5 bits) : yyyyy (0-31) */
|
||||
/* G (6 bits) : yyyyyy (0-63) */
|
||||
/* */
|
||||
/* normal mode : xxx0 (0-14) */
|
||||
/* 0000 -> 00000 (000000) */
|
||||
/* 0010 -> 00100 (001000) */
|
||||
/* 0100 -> 01000 (010001) */
|
||||
/* 0110 -> 01100 (011001) */
|
||||
/* 1000 -> 10001 (100010) */
|
||||
/* 1010 -> 10101 (101010) */
|
||||
/* 1100 -> 11001 (110011) */
|
||||
/* 1110 -> 11101 (111011) */
|
||||
/* */
|
||||
/* shadow mode : 0xxx (0-7) */
|
||||
/* 0000 -> 00000 (000000) */
|
||||
/* 0001 -> 00010 (000100) */
|
||||
/* 0010 -> 00100 (001000) */
|
||||
/* 0011 -> 00110 (001100) */
|
||||
/* 0100 -> 01000 (010001) */
|
||||
/* 0101 -> 01010 (010101) */
|
||||
/* 0110 -> 01100 (011001) */
|
||||
/* 0111 -> 01110 (011101) */
|
||||
/* */
|
||||
/* highlight mode: 1xxx (8-15) */
|
||||
/* 1000 -> 10001 (100010) */
|
||||
/* 1001 -> 10011 (100110) */
|
||||
/* 1010 -> 10101 (101010) */
|
||||
/* 1011 -> 10111 (101110) */
|
||||
/* 1100 -> 11001 (110011) */
|
||||
/* 1101 -> 11011 (110111) */
|
||||
/* 1110 -> 11101 (111011) */
|
||||
/* 1111 -> 11111 (111111) */
|
||||
/* */
|
||||
/******************************************/
|
||||
#define MAKE_PIXEL_16(r,g,b) (((r) << 12) | (((r) >> 3) << 12) | ((g) << 7) | (((g) >> 2) << 5) | ((b) << 1) | ((b) >> 3) )
|
||||
|
||||
#ifndef NGC
|
||||
/* 8:8:8 RGB */
|
||||
#define MAKE_PIXEL_32(r,g,b) ((r) << 20 | (g) << 12 | (b) << 4)
|
||||
/* 5:5:5 RGB */
|
||||
#define MAKE_PIXEL_15(r,g,b) ((r) << 11 | (g) << 6 | (b) << 1)
|
||||
/* 3:3:2 RGB */
|
||||
#define MAKE_PIXEL_8(r,g,b) ((r) << 5 | (g) << 2 | ((b) >> 1))
|
||||
#endif
|
||||
|
||||
|
||||
/* Clip data */
|
||||
@ -411,347 +427,6 @@ static uint8 obj_buf[0x200]; /* Object layer line buffer */
|
||||
/* Sprite line buffer data */
|
||||
static uint32 object_index_count;
|
||||
|
||||
/*
|
||||
3:3:3 to 5:6:5 RGB pixel extrapolation tables
|
||||
this is used to convert 3bits RGB values to 5bits (R,B) or 6bits (G) values
|
||||
there is three color modes:
|
||||
normal: RGB range is [0;MAX]
|
||||
half: RGB range is [0;MAX/2] (shadow mode)
|
||||
high: RGB range is [MAX/2;MAX] (highlight mode)
|
||||
|
||||
MAX is 31 (R,B) or 63 (G) for 5:6:5 pixels and 7 (R,G,B) for 3:3:3 pixels
|
||||
MAX/2 is rounded to inferior value (15, 31 or 3)
|
||||
|
||||
the extrapolation is linear and calculated like this:
|
||||
|
||||
for (i=0; i<8; i++)
|
||||
{
|
||||
rgb565_norm[0][i] = round(((double)i * 31.0) / 7.0);
|
||||
rgb565_norm[1][i] = round(((double)i * 63.0) / 7.0);
|
||||
|
||||
rgb565_half[0][i] = round(((double)i * 31.0) / 7.0 / 2.0);
|
||||
rgb565_half[1][i] = round(((double)i * 63.0) / 7.0 / 2.0);
|
||||
|
||||
rgb565_high[0][i] = round(((double)i * 31.0) / 7.0 / 2.0 + 15.5);
|
||||
rgb565_high[1][i] = round(((double)i * 63.0) / 7.0 / 2.0 + 31.5);
|
||||
}
|
||||
|
||||
*/
|
||||
|
||||
static const uint8 rgb565_norm[2][8] =
|
||||
{
|
||||
{0 , 4, 9, 13, 18, 22, 27, 31},
|
||||
{0 , 9, 18, 27, 36, 45, 54, 63}
|
||||
};
|
||||
|
||||
static const uint8 rgb565_half[2][8] =
|
||||
{
|
||||
{0 , 2, 4, 6, 9, 11, 13, 15},
|
||||
{0 , 4, 9, 13, 18, 22, 27, 31}
|
||||
};
|
||||
|
||||
static const uint8 rgb565_high[2][8] =
|
||||
{
|
||||
{15, 17, 19, 21, 24, 26, 28, 31},
|
||||
{31, 35, 40, 44, 49, 53, 58, 63}
|
||||
};
|
||||
|
||||
/*--------------------------------------------------------------------------*/
|
||||
/* Init, reset, shutdown routines */
|
||||
/*--------------------------------------------------------------------------*/
|
||||
|
||||
void render_init(void)
|
||||
{
|
||||
int bx, ax, i;
|
||||
|
||||
/* Allocate and align pixel look-up tables */
|
||||
if (lut_base == NULL) lut_base = malloc ((LUT_MAX * LUT_SIZE) + LUT_SIZE);
|
||||
lut[0] = (uint8 *) (((uint32) lut_base + LUT_SIZE) & ~(LUT_SIZE - 1));
|
||||
for (i = 1; i < LUT_MAX; i += 1) lut[i] = lut[0] + (i * LUT_SIZE);
|
||||
|
||||
/* Make pixel look-up table data */
|
||||
for (bx = 0; bx < 0x100; bx += 1)
|
||||
for (ax = 0; ax < 0x100; ax += 1)
|
||||
{
|
||||
uint16 index = (bx << 8) | (ax);
|
||||
lut[0][index] = make_lut_bg (bx, ax);
|
||||
lut[1][index] = make_lut_obj (bx, ax);
|
||||
lut[2][index] = make_lut_bg_ste (bx, ax);
|
||||
lut[3][index] = make_lut_obj_ste (bx, ax);
|
||||
lut[4][index] = make_lut_bgobj_ste (bx, ax);
|
||||
}
|
||||
|
||||
/* Make pixel data tables */
|
||||
palette_init();
|
||||
|
||||
/* Set up color update function */
|
||||
#ifndef NGC
|
||||
switch(bitmap.depth)
|
||||
{
|
||||
case 8: color_update = color_update_8; break;
|
||||
case 15: color_update = color_update_15; break;
|
||||
case 16: color_update = color_update_16; break;
|
||||
case 32: color_update = color_update_32; break;
|
||||
}
|
||||
#else
|
||||
color_update = color_update_16;
|
||||
#endif
|
||||
|
||||
/* Make sprite name look-up table */
|
||||
make_name_lut();
|
||||
}
|
||||
|
||||
void render_reset(void)
|
||||
{
|
||||
/* Clear display bitmap */
|
||||
memset(bitmap.data, 0, bitmap.pitch * bitmap.height);
|
||||
|
||||
memset(bg_buf, 0, sizeof(bg_buf));
|
||||
memset(tmp_buf, 0, sizeof(tmp_buf));
|
||||
memset(nta_buf, 0, sizeof(nta_buf));
|
||||
memset(ntb_buf, 0, sizeof(ntb_buf));
|
||||
memset(obj_buf, 0, sizeof(obj_buf));
|
||||
|
||||
#ifndef NGC
|
||||
memset(&pixel_8, 0, sizeof(pixel_8));
|
||||
memset(&pixel_15, 0, sizeof(pixel_15));
|
||||
memset(&pixel_32, 0, sizeof(pixel_32));
|
||||
#endif
|
||||
memset(&pixel_16, 0, sizeof(pixel_16));
|
||||
|
||||
window_clip();
|
||||
}
|
||||
|
||||
|
||||
void render_shutdown(void)
|
||||
{
|
||||
if(lut_base) free(lut_base);
|
||||
}
|
||||
|
||||
|
||||
/*--------------------------------------------------------------------------*/
|
||||
/* Line render function */
|
||||
/*--------------------------------------------------------------------------*/
|
||||
|
||||
void render_line(uint32 line, uint32 overscan)
|
||||
{
|
||||
uint32 width = bitmap.viewport.w;
|
||||
uint32 x_offset = bitmap.viewport.x;
|
||||
|
||||
/* display OFF */
|
||||
if (reg[0] & 0x01) return;
|
||||
|
||||
/* background color (blanked display or vertical borders) */
|
||||
if (!(reg[1] & 0x40) || overscan)
|
||||
{
|
||||
width += 2 * x_offset;
|
||||
memset(&tmp_buf[0x20 - x_offset], 0x40, width);
|
||||
}
|
||||
else
|
||||
{
|
||||
uint8 *lb = tmp_buf;
|
||||
|
||||
/* update pattern generator */
|
||||
if (bg_list_index)
|
||||
{
|
||||
update_bg_pattern_cache(bg_list_index);
|
||||
bg_list_index = 0;
|
||||
}
|
||||
|
||||
/* double-resolution mode */
|
||||
if(im2_flag)
|
||||
{
|
||||
uint32 odd = odd_frame;
|
||||
|
||||
/* render BG layers */
|
||||
render_bg_im2(line, width, odd);
|
||||
|
||||
if (reg[12] & 8)
|
||||
{
|
||||
/* Shadow & Highlight */
|
||||
merge(&nta_buf[0x20], &ntb_buf[0x20], &bg_buf[0x20], lut[2], width);
|
||||
memset(&obj_buf[0x20], 0, width);
|
||||
if (object_index_count) render_obj_im2(line, odd, obj_buf, lut[3]);
|
||||
merge(&obj_buf[0x20], &bg_buf[0x20], &lb[0x20], lut[4], width);
|
||||
}
|
||||
else
|
||||
{
|
||||
merge(&nta_buf[0x20], &ntb_buf[0x20], &lb[0x20], lut[0], width);
|
||||
if (object_index_count) render_obj_im2(line, odd, lb, lut[1]);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* render BG layers */
|
||||
if(reg[11] & 4) render_bg_vs(line, width);
|
||||
else render_bg(line, width);
|
||||
|
||||
if(reg[12] & 8)
|
||||
{
|
||||
/* Shadow & Highlight */
|
||||
merge(&nta_buf[0x20], &ntb_buf[0x20], &bg_buf[0x20], lut[2], width);
|
||||
memset(&obj_buf[0x20], 0, width);
|
||||
render_obj(line, obj_buf, lut[3]);
|
||||
merge(&obj_buf[0x20], &bg_buf[0x20], &lb[0x20], lut[4], width);
|
||||
}
|
||||
else
|
||||
{
|
||||
merge(&nta_buf[0x20], &ntb_buf[0x20], &lb[0x20], lut[0], width);
|
||||
render_obj(line, lb, lut[1]);
|
||||
}
|
||||
}
|
||||
|
||||
/* Mode 4 feature only (unemulated, no games rely on this) */
|
||||
/*if(!(reg[1] & 0x04) && (reg[0] & 0x20)) memset(&lb[0x20], 0x40, 0x08);*/
|
||||
|
||||
/* borders */
|
||||
if (x_offset)
|
||||
{
|
||||
memset(&lb[0x20 - x_offset], 0x40, x_offset);
|
||||
memset(&lb[0x20 + width], 0x40, x_offset);
|
||||
width += 2 * x_offset;
|
||||
}
|
||||
}
|
||||
|
||||
/* pixel color remapping */
|
||||
remap_buffer(line,width);
|
||||
}
|
||||
|
||||
void remap_buffer(uint32 line, uint32 width)
|
||||
{
|
||||
/* get line offset from framebuffer */
|
||||
line = (line + bitmap.viewport.y) % lines_per_frame;
|
||||
|
||||
/* double resolution mode */
|
||||
if (config.render && interlaced) line = (line * 2) + odd_frame;
|
||||
|
||||
/* NTSC Filter */
|
||||
if (config.ntsc)
|
||||
{
|
||||
if (reg[12]&1) md_ntsc_blit(&md_ntsc, ( MD_NTSC_IN_T const * )pixel_16, tmp_buf+0x20-bitmap.viewport.x, width, line);
|
||||
else sms_ntsc_blit(&sms_ntsc, ( SMS_NTSC_IN_T const * )pixel_16, tmp_buf+0x20-bitmap.viewport.x, width, line);
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef NGC
|
||||
/* directly fill the RGB565 texture */
|
||||
/* one tile is 32 byte = 4x4 pixels */
|
||||
/* tiles are stored continuously in texture memory */
|
||||
width = width >> 2;
|
||||
int offset = ((width << 5) * (line >> 2)) + ((line & 3) * 8);
|
||||
remap_texture(tmp_buf+0x20-bitmap.viewport.x, (uint16 *)(texturemem + offset), width);
|
||||
|
||||
#else
|
||||
void *out =((void *)&bitmap.data[(line * bitmap.pitch)]);
|
||||
switch(bitmap.depth)
|
||||
{
|
||||
case 8:
|
||||
remap_8(tmp_buf+0x20-bitmap.viewport.x, (uint8 *)out, pixel_8, width);
|
||||
break;
|
||||
case 15:
|
||||
remap_16(tmp_buf+0x20-bitmap.viewport.x, (uint16 *)out, pixel_15, width);
|
||||
break;
|
||||
case 16:
|
||||
remap_16(tmp_buf+0x20-bitmap.viewport.x, (uint16 *)out, pixel_16, width);
|
||||
break;
|
||||
case 32:
|
||||
remap_32(tmp_buf+0x20-bitmap.viewport.x, (uint32 *)out, pixel_32, width);
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
/* Update Window Clipping (only called when registers change) */
|
||||
void window_clip(void)
|
||||
{
|
||||
/* Window size and invert flags */
|
||||
int hp = (reg[17] & 0x1f);
|
||||
int hf = (reg[17] >> 7) & 1;
|
||||
|
||||
/* Display size */
|
||||
int sw = bitmap.viewport.w >> 4;
|
||||
|
||||
/* Clear clipping data */
|
||||
memset(&clip, 0, sizeof(clip));
|
||||
|
||||
/* Perform horizontal clipping; the results are applied in reverse
|
||||
if the horizontal inversion flag is set */
|
||||
int a = hf;
|
||||
int w = hf ^ 1;
|
||||
|
||||
if(hp)
|
||||
{
|
||||
if(hp > sw)
|
||||
{
|
||||
/* Plane W takes up entire line */
|
||||
clip[w].right = sw;
|
||||
clip[w].enable = 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Window takes left side, Plane A takes right side */
|
||||
clip[w].right = hp;
|
||||
clip[a].left = hp;
|
||||
clip[a].right = sw;
|
||||
clip[0].enable = clip[1].enable = 1;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Plane A takes up entire line */
|
||||
clip[a].right = sw;
|
||||
clip[a].enable = 1;
|
||||
}
|
||||
}
|
||||
|
||||
/*--------------------------------------------------------------------------*/
|
||||
/* Sprites Parsing function */
|
||||
/*--------------------------------------------------------------------------*/
|
||||
|
||||
void parse_satb(uint32 line)
|
||||
{
|
||||
uint8 sizetab[] = {8, 16, 24, 32};
|
||||
uint32 link = 0;
|
||||
uint32 count, ypos, size, height;
|
||||
|
||||
uint32 limit = (reg[12] & 1) ? 20 : 16;
|
||||
uint32 total = limit << 2;
|
||||
|
||||
uint16 *p = (uint16 *) &vram[satb];
|
||||
uint16 *q = (uint16 *) &sat[0];
|
||||
|
||||
object_index_count = 0;
|
||||
|
||||
for(count = 0; count < total; count += 1)
|
||||
{
|
||||
ypos = (q[link] >> im2_flag) & 0x1FF;
|
||||
size = q[link + 1] >> 8;
|
||||
height = sizetab[size & 3];
|
||||
|
||||
if((line >= ypos) && (line < (ypos + height)))
|
||||
{
|
||||
/* sprite limit (max. 16 or 20 sprites displayed per line) */
|
||||
if(object_index_count == limit)
|
||||
{
|
||||
if(vint_pending == 0) status |= 0x40;
|
||||
return;
|
||||
}
|
||||
|
||||
// using xpos from internal satb stops sprite x
|
||||
// scrolling in bloodlin.bin,
|
||||
// but this seems to go against the test prog
|
||||
object_info[object_index_count].attr = p[link + 2];
|
||||
object_info[object_index_count].xpos = p[link + 3];
|
||||
object_info[object_index_count].ypos = ypos;
|
||||
object_info[object_index_count].size = size;
|
||||
++object_index_count;
|
||||
}
|
||||
|
||||
link = (q[link + 1] & 0x7F) << 2;
|
||||
if(link == 0) break;
|
||||
}
|
||||
}
|
||||
|
||||
/*--------------------------------------------------------------------------*/
|
||||
/* Look-up table functions (handles priority between layers pixels) */
|
||||
/*--------------------------------------------------------------------------*/
|
||||
@ -782,11 +457,10 @@ static void palette_init(void)
|
||||
pixel_32_lut[2][i] = MAKE_PIXEL_32(r|8,g|8,b|8);
|
||||
#endif
|
||||
|
||||
/* RGB 565 format: we extrapolate each 3-bit value into a 5-bit (R,B) or 6-bit (G) value
|
||||
this is needed to correctly cover full color range: [0-31] for R,B or [0-63] for G */
|
||||
pixel_16_lut[0][i] = MAKE_PIXEL_16(rgb565_half[0][r],rgb565_half[1][g],rgb565_half[0][b]);
|
||||
pixel_16_lut[1][i] = MAKE_PIXEL_16(rgb565_norm[0][r],rgb565_norm[1][g],rgb565_norm[0][b]);
|
||||
pixel_16_lut[2][i] = MAKE_PIXEL_16(rgb565_high[0][r],rgb565_high[1][g],rgb565_high[0][b]);
|
||||
pixel_16_lut[0][i] = MAKE_PIXEL_16(r,g,b);
|
||||
pixel_16_lut[1][i] = MAKE_PIXEL_16(r<<1,g<<1,b<<1);
|
||||
|
||||
pixel_16_lut[2][i] = MAKE_PIXEL_16(r|8,g|8,b|8);
|
||||
}
|
||||
}
|
||||
|
||||
@ -1849,3 +1523,298 @@ static void render_obj_im2(uint32 line, uint32 odd, uint8 *buf, uint8 *table)
|
||||
spr_over = 0;
|
||||
}
|
||||
|
||||
/*--------------------------------------------------------------------------*/
|
||||
/* Init, reset, shutdown routines */
|
||||
/*--------------------------------------------------------------------------*/
|
||||
|
||||
void render_init(void)
|
||||
{
|
||||
int bx, ax, i;
|
||||
|
||||
/* Allocate and align pixel look-up tables */
|
||||
if (lut_base == NULL) lut_base = malloc ((LUT_MAX * LUT_SIZE) + LUT_SIZE);
|
||||
lut[0] = (uint8 *) (((uint32) lut_base + LUT_SIZE) & ~(LUT_SIZE - 1));
|
||||
for (i = 1; i < LUT_MAX; i += 1) lut[i] = lut[0] + (i * LUT_SIZE);
|
||||
|
||||
/* Make pixel look-up table data */
|
||||
for (bx = 0; bx < 0x100; bx += 1)
|
||||
for (ax = 0; ax < 0x100; ax += 1)
|
||||
{
|
||||
uint16 index = (bx << 8) | (ax);
|
||||
lut[0][index] = make_lut_bg (bx, ax);
|
||||
lut[1][index] = make_lut_obj (bx, ax);
|
||||
lut[2][index] = make_lut_bg_ste (bx, ax);
|
||||
lut[3][index] = make_lut_obj_ste (bx, ax);
|
||||
lut[4][index] = make_lut_bgobj_ste (bx, ax);
|
||||
}
|
||||
|
||||
/* Make pixel data tables */
|
||||
palette_init();
|
||||
|
||||
/* Set up color update function */
|
||||
#ifndef NGC
|
||||
switch(bitmap.depth)
|
||||
{
|
||||
case 8: color_update = color_update_8; break;
|
||||
case 15: color_update = color_update_15; break;
|
||||
case 16: color_update = color_update_16; break;
|
||||
case 32: color_update = color_update_32; break;
|
||||
}
|
||||
#else
|
||||
color_update = color_update_16;
|
||||
#endif
|
||||
|
||||
/* Make sprite name look-up table */
|
||||
make_name_lut();
|
||||
}
|
||||
|
||||
void render_reset(void)
|
||||
{
|
||||
/* Clear display bitmap */
|
||||
memset(bitmap.data, 0, bitmap.pitch * bitmap.height);
|
||||
|
||||
memset(bg_buf, 0, sizeof(bg_buf));
|
||||
memset(tmp_buf, 0, sizeof(tmp_buf));
|
||||
memset(nta_buf, 0, sizeof(nta_buf));
|
||||
memset(ntb_buf, 0, sizeof(ntb_buf));
|
||||
memset(obj_buf, 0, sizeof(obj_buf));
|
||||
|
||||
#ifndef NGC
|
||||
memset(&pixel_8, 0, sizeof(pixel_8));
|
||||
memset(&pixel_15, 0, sizeof(pixel_15));
|
||||
memset(&pixel_32, 0, sizeof(pixel_32));
|
||||
#endif
|
||||
memset(&pixel_16, 0, sizeof(pixel_16));
|
||||
|
||||
window_clip();
|
||||
}
|
||||
|
||||
|
||||
void render_shutdown(void)
|
||||
{
|
||||
if(lut_base) free(lut_base);
|
||||
}
|
||||
|
||||
|
||||
/*--------------------------------------------------------------------------*/
|
||||
/* Line render function */
|
||||
/*--------------------------------------------------------------------------*/
|
||||
|
||||
void render_line(uint32 line, uint32 overscan)
|
||||
{
|
||||
uint32 width = bitmap.viewport.w;
|
||||
uint32 x_offset = bitmap.viewport.x;
|
||||
|
||||
/* display OFF */
|
||||
if (reg[0] & 0x01) return;
|
||||
|
||||
/* background color (blanked display or vertical borders) */
|
||||
if (!(reg[1] & 0x40) || overscan)
|
||||
{
|
||||
width += 2 * x_offset;
|
||||
memset(&tmp_buf[0x20 - x_offset], 0x40, width);
|
||||
}
|
||||
else
|
||||
{
|
||||
uint8 *lb = tmp_buf;
|
||||
|
||||
/* update pattern generator */
|
||||
if (bg_list_index)
|
||||
{
|
||||
update_bg_pattern_cache(bg_list_index);
|
||||
bg_list_index = 0;
|
||||
}
|
||||
|
||||
/* double-resolution mode */
|
||||
if(im2_flag)
|
||||
{
|
||||
uint32 odd = odd_frame;
|
||||
|
||||
/* render BG layers */
|
||||
render_bg_im2(line, width, odd);
|
||||
|
||||
if (reg[12] & 8)
|
||||
{
|
||||
/* Shadow & Highlight */
|
||||
merge(&nta_buf[0x20], &ntb_buf[0x20], &bg_buf[0x20], lut[2], width);
|
||||
memset(&obj_buf[0x20], 0, width);
|
||||
if (object_index_count) render_obj_im2(line, odd, obj_buf, lut[3]);
|
||||
merge(&obj_buf[0x20], &bg_buf[0x20], &lb[0x20], lut[4], width);
|
||||
}
|
||||
else
|
||||
{
|
||||
merge(&nta_buf[0x20], &ntb_buf[0x20], &lb[0x20], lut[0], width);
|
||||
if (object_index_count) render_obj_im2(line, odd, lb, lut[1]);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* render BG layers */
|
||||
if(reg[11] & 4) render_bg_vs(line, width);
|
||||
else render_bg(line, width);
|
||||
|
||||
if(reg[12] & 8)
|
||||
{
|
||||
/* Shadow & Highlight */
|
||||
merge(&nta_buf[0x20], &ntb_buf[0x20], &bg_buf[0x20], lut[2], width);
|
||||
memset(&obj_buf[0x20], 0, width);
|
||||
render_obj(line, obj_buf, lut[3]);
|
||||
merge(&obj_buf[0x20], &bg_buf[0x20], &lb[0x20], lut[4], width);
|
||||
}
|
||||
else
|
||||
{
|
||||
merge(&nta_buf[0x20], &ntb_buf[0x20], &lb[0x20], lut[0], width);
|
||||
render_obj(line, lb, lut[1]);
|
||||
}
|
||||
}
|
||||
|
||||
/* Mode 4 feature only (unemulated, no games rely on this) */
|
||||
/*if(!(reg[1] & 0x04) && (reg[0] & 0x20)) memset(&lb[0x20], 0x40, 0x08);*/
|
||||
|
||||
/* borders */
|
||||
if (x_offset)
|
||||
{
|
||||
memset(&lb[0x20 - x_offset], 0x40, x_offset);
|
||||
memset(&lb[0x20 + width], 0x40, x_offset);
|
||||
width += 2 * x_offset;
|
||||
}
|
||||
}
|
||||
|
||||
/* pixel color remapping */
|
||||
remap_buffer(line,width);
|
||||
}
|
||||
|
||||
void remap_buffer(uint32 line, uint32 width)
|
||||
{
|
||||
/* get line offset from framebuffer */
|
||||
line = (line + bitmap.viewport.y) % lines_per_frame;
|
||||
|
||||
/* double resolution mode */
|
||||
if (config.render && interlaced) line = (line * 2) + odd_frame;
|
||||
|
||||
/* NTSC Filter */
|
||||
if (config.ntsc)
|
||||
{
|
||||
if (reg[12]&1) md_ntsc_blit(&md_ntsc, ( MD_NTSC_IN_T const * )pixel_16, tmp_buf+0x20-bitmap.viewport.x, width, line);
|
||||
else sms_ntsc_blit(&sms_ntsc, ( SMS_NTSC_IN_T const * )pixel_16, tmp_buf+0x20-bitmap.viewport.x, width, line);
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef NGC
|
||||
/* directly fill the RGB565 texture */
|
||||
/* one tile is 32 byte = 4x4 pixels */
|
||||
/* tiles are stored continuously in texture memory */
|
||||
width = width >> 2;
|
||||
int offset = ((width << 5) * (line >> 2)) + ((line & 3) * 8);
|
||||
remap_texture(tmp_buf+0x20-bitmap.viewport.x, (uint16 *)(texturemem + offset), width);
|
||||
|
||||
#else
|
||||
void *out =((void *)&bitmap.data[(line * bitmap.pitch)]);
|
||||
switch(bitmap.depth)
|
||||
{
|
||||
case 8:
|
||||
remap_8(tmp_buf+0x20-bitmap.viewport.x, (uint8 *)out, pixel_8, width);
|
||||
break;
|
||||
case 15:
|
||||
remap_16(tmp_buf+0x20-bitmap.viewport.x, (uint16 *)out, pixel_15, width);
|
||||
break;
|
||||
case 16:
|
||||
remap_16(tmp_buf+0x20-bitmap.viewport.x, (uint16 *)out, pixel_16, width);
|
||||
break;
|
||||
case 32:
|
||||
remap_32(tmp_buf+0x20-bitmap.viewport.x, (uint32 *)out, pixel_32, width);
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
/* Update Window Clipping (only called when registers change) */
|
||||
void window_clip(void)
|
||||
{
|
||||
/* Window size and invert flags */
|
||||
int hp = (reg[17] & 0x1f);
|
||||
int hf = (reg[17] >> 7) & 1;
|
||||
|
||||
/* Display size */
|
||||
int sw = bitmap.viewport.w >> 4;
|
||||
|
||||
/* Clear clipping data */
|
||||
memset(&clip, 0, sizeof(clip));
|
||||
|
||||
/* Perform horizontal clipping; the results are applied in reverse
|
||||
if the horizontal inversion flag is set */
|
||||
int a = hf;
|
||||
int w = hf ^ 1;
|
||||
|
||||
if(hp)
|
||||
{
|
||||
if(hp > sw)
|
||||
{
|
||||
/* Plane W takes up entire line */
|
||||
clip[w].right = sw;
|
||||
clip[w].enable = 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Window takes left side, Plane A takes right side */
|
||||
clip[w].right = hp;
|
||||
clip[a].left = hp;
|
||||
clip[a].right = sw;
|
||||
clip[0].enable = clip[1].enable = 1;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Plane A takes up entire line */
|
||||
clip[a].right = sw;
|
||||
clip[a].enable = 1;
|
||||
}
|
||||
}
|
||||
|
||||
/*--------------------------------------------------------------------------*/
|
||||
/* Sprites Parsing function */
|
||||
/*--------------------------------------------------------------------------*/
|
||||
|
||||
void parse_satb(uint32 line)
|
||||
{
|
||||
uint8 sizetab[] = {8, 16, 24, 32};
|
||||
uint32 link = 0;
|
||||
uint32 count, ypos, size, height;
|
||||
|
||||
uint32 limit = (reg[12] & 1) ? 20 : 16;
|
||||
uint32 total = limit << 2;
|
||||
|
||||
uint16 *p = (uint16 *) &vram[satb];
|
||||
uint16 *q = (uint16 *) &sat[0];
|
||||
|
||||
object_index_count = 0;
|
||||
|
||||
for(count = 0; count < total; count += 1)
|
||||
{
|
||||
ypos = (q[link] >> im2_flag) & 0x1FF;
|
||||
size = q[link + 1] >> 8;
|
||||
height = sizetab[size & 3];
|
||||
|
||||
if((line >= ypos) && (line < (ypos + height)))
|
||||
{
|
||||
/* sprite limit (max. 16 or 20 sprites displayed per line) */
|
||||
if(object_index_count == limit)
|
||||
{
|
||||
if(vint_pending == 0) status |= 0x40;
|
||||
return;
|
||||
}
|
||||
|
||||
// using xpos from internal satb stops sprite x
|
||||
// scrolling in bloodlin.bin,
|
||||
// but this seems to go against the test prog
|
||||
object_info[object_index_count].attr = p[link + 2];
|
||||
object_info[object_index_count].xpos = p[link + 3];
|
||||
object_info[object_index_count].ypos = ypos;
|
||||
object_info[object_index_count].size = size;
|
||||
++object_index_count;
|
||||
}
|
||||
|
||||
link = (q[link + 1] & 0x7F) << 2;
|
||||
if(link == 0) break;
|
||||
}
|
||||
}
|
||||
|
||||
@ -410,7 +410,6 @@ void vdp_ctrl_w(unsigned int data)
|
||||
*/
|
||||
unsigned int vdp_ctrl_r(void)
|
||||
{
|
||||
|
||||
/* update FIFO flags */
|
||||
fifo_update();
|
||||
if (fifo_write_cnt < 4)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user