mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 15:27:46 -04:00
mcd, accelerate scale/rot rendering code
This commit is contained in:
kub
parent
099f68c22a
commit
b633247f35
1 changed files with 158 additions and 127 deletions
231
pico/cd/gfx.c
231
pico/cd/gfx.c
|
|
@ -52,7 +52,8 @@ typedef struct
|
||||||
uint32 y_step; /* pico: render line step */
|
uint32 y_step; /* pico: render line step */
|
||||||
uint8 lut_prio[4][0x10][0x10]; /* WORD-RAM data writes priority lookup table */
|
uint8 lut_prio[4][0x10][0x10]; /* WORD-RAM data writes priority lookup table */
|
||||||
uint8 lut_pixel[0x200]; /* Graphics operation dot offset lookup table */
|
uint8 lut_pixel[0x200]; /* Graphics operation dot offset lookup table */
|
||||||
uint8 lut_cell[0x100]; /* Graphics operation stamp offset lookup table */
|
uint16 lut_cell2[0x80]; /* Graphics operation stamp offset lookup table */
|
||||||
|
uint16 lut_cell4[0x80]; /* Graphics operation stamp offset lookup table */
|
||||||
} gfx_t;
|
} gfx_t;
|
||||||
|
|
||||||
static gfx_t gfx;
|
static gfx_t gfx;
|
||||||
|
|
@ -66,7 +67,7 @@ static void gfx_schedule(void);
|
||||||
void gfx_init(void)
|
void gfx_init(void)
|
||||||
{
|
{
|
||||||
int i, j;
|
int i, j;
|
||||||
uint8 mask, row, col, temp;
|
uint8 row, col, temp;
|
||||||
|
|
||||||
memset(&gfx, 0, sizeof(gfx));
|
memset(&gfx, 0, sizeof(gfx));
|
||||||
|
|
||||||
|
|
@ -87,24 +88,23 @@ void gfx_init(void)
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Initialize cell lookup table */
|
/* Initialize cell lookup table */
|
||||||
/* table entry = yyxxshrr (8 bits) */
|
/* table entry = yyxxhrr (7 bits) */
|
||||||
/* with: yy = cell row (0-3) */
|
/* with: yy = cell row (0-3) */
|
||||||
/* xx = cell column (0-3) */
|
/* xx = cell column (0-3) */
|
||||||
/* s = stamp size (0=16x16, 1=32x32) */
|
|
||||||
/* hrr = HFLIP & ROTATION bits */
|
/* hrr = HFLIP & ROTATION bits */
|
||||||
for (i=0; i<0x100; i++)
|
for (i=0; i<0x80; i++)
|
||||||
{
|
{
|
||||||
/* one stamp = 2x2 cells (16x16) or 4x4 cells (32x32) */
|
/* one stamp = 2x2 cells (16x16) or 4x4 cells (32x32) */
|
||||||
mask = (i & 8) ? 3 : 1;
|
row = (i >> 5) & 3;
|
||||||
row = (i >> 6) & mask;
|
col = (i >> 3) & 3;
|
||||||
col = (i >> 4) & mask;
|
|
||||||
|
|
||||||
if (i & 4) { col = col ^ mask; } /* HFLIP (always first) */
|
if (i & 4) { col = col ^ 3; } /* HFLIP (always first) */
|
||||||
if (i & 2) { col = col ^ mask; row = row ^ mask; } /* ROLL1 */
|
if (i & 2) { col = col ^ 3; row = row ^ 3; } /* ROLL1 */
|
||||||
if (i & 1) { temp = col; col = row ^ mask; row = temp; } /* ROLL0 */
|
if (i & 1) { temp = col; col = row ^ 3; row = temp; } /* ROLL0 */
|
||||||
|
|
||||||
/* cell offset (0-3 or 0-15) */
|
/* cell offset (0-3 or 0-15) */
|
||||||
gfx.lut_cell[i] = row + col * (mask + 1);
|
gfx.lut_cell2[i] = ((row&1) + (col&1) * 2) << 6;
|
||||||
|
gfx.lut_cell4[i] = ((row&3) + (col&3) * 4) << 6;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Initialize pixel lookup table */
|
/* Initialize pixel lookup table */
|
||||||
|
|
@ -175,48 +175,14 @@ int gfx_context_load(const uint8 *state)
|
||||||
return bufferptr;
|
return bufferptr;
|
||||||
}
|
}
|
||||||
|
|
||||||
static void gfx_render(uint32 bufferIndex, uint32 width)
|
static inline int gfx_pixel(uint32 xpos, uint32 ypos, uint16 *lut_cell)
|
||||||
{
|
{
|
||||||
uint8 pixel_in, pixel_out;
|
|
||||||
uint16 stamp_data;
|
uint16 stamp_data;
|
||||||
uint32 stamp_index;
|
uint32 stamp_index;
|
||||||
uint32 priority;
|
uint8 pixel_out = 0x00;
|
||||||
|
|
||||||
/* pixel map start position for current line (13.3 format converted to 13.11) */
|
|
||||||
uint32 xpos = *gfx.tracePtr++ << 8;
|
|
||||||
uint32 ypos = *gfx.tracePtr++ << 8;
|
|
||||||
|
|
||||||
/* pixel map offset values for current line (5.11 format) */
|
|
||||||
uint32 xoffset = (int16) *gfx.tracePtr++;
|
|
||||||
uint32 yoffset = (int16) *gfx.tracePtr++;
|
|
||||||
|
|
||||||
priority = (Pico_mcd->s68k_regs[2] << 8) | Pico_mcd->s68k_regs[3];
|
|
||||||
priority = (priority >> 3) & 0x03;
|
|
||||||
|
|
||||||
/* process all dots */
|
|
||||||
while (width--)
|
|
||||||
{
|
|
||||||
/* check if stamp map is repeated */
|
|
||||||
if (Pico_mcd->s68k_regs[0x58+1] & 0x01)
|
|
||||||
{
|
|
||||||
/* stamp map range */
|
|
||||||
xpos &= gfx.dotMask;
|
|
||||||
ypos &= gfx.dotMask;
|
|
||||||
}
|
|
||||||
else
|
|
||||||
{
|
|
||||||
/* 24-bit range */
|
|
||||||
xpos &= 0xffffff;
|
|
||||||
ypos &= 0xffffff;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* check if pixel is outside stamp map */
|
/* check if pixel is outside stamp map */
|
||||||
if ((xpos | ypos) & ~gfx.dotMask)
|
if (((xpos | ypos) & ~gfx.dotMask) == 0)
|
||||||
{
|
|
||||||
/* force pixel output to 0 */
|
|
||||||
pixel_out = 0x00;
|
|
||||||
}
|
|
||||||
else
|
|
||||||
{
|
{
|
||||||
/* read stamp map table data */
|
/* read stamp map table data */
|
||||||
stamp_data = gfx.mapPtr[(xpos >> gfx.stampShift) | ((ypos >> gfx.stampShift) << gfx.mapShift)];
|
stamp_data = gfx.mapPtr[(xpos >> gfx.stampShift) | ((ypos >> gfx.stampShift) << gfx.mapShift)];
|
||||||
|
|
@ -235,14 +201,11 @@ static void gfx_render(uint32 bufferIndex, uint32 width)
|
||||||
stamp_data = (stamp_data >> 13) & 7;
|
stamp_data = (stamp_data >> 13) & 7;
|
||||||
|
|
||||||
/* cell offset (0-3 or 0-15) */
|
/* cell offset (0-3 or 0-15) */
|
||||||
/* table entry = yyxxshrr (8 bits) */
|
/* table entry = yyxxhrr (7 bits) */
|
||||||
/* with: yy = cell row (0-3) = (ypos >> (11 + 3)) & 3 */
|
/* with: yy = cell row (0-3) = (ypos >> (11 + 3)) & 3 */
|
||||||
/* xx = cell column (0-3) = (xpos >> (11 + 3)) & 3 */
|
/* xx = cell column (0-3) = (xpos >> (11 + 3)) & 3 */
|
||||||
/* s = stamp size (0=16x16, 1=32x32) */
|
|
||||||
/* hrr = HFLIP & ROTATION bits */
|
/* hrr = HFLIP & ROTATION bits */
|
||||||
stamp_index |= gfx.lut_cell[
|
stamp_index |= lut_cell[stamp_data | ((ypos >> 9) & 0x60) | ((xpos >> 11) & 0x18)];
|
||||||
stamp_data | ((Pico_mcd->s68k_regs[0x58+1] & 0x02) << 2 )
|
|
||||||
| ((ypos >> 8) & 0xc0) | ((xpos >> 10) & 0x30)] << 6;
|
|
||||||
|
|
||||||
/* pixel offset (0-63) */
|
/* pixel offset (0-63) */
|
||||||
/* table entry = yyyxxxhrr (9 bits) */
|
/* table entry = yyyxxxhrr (9 bits) */
|
||||||
|
|
@ -255,59 +218,127 @@ static void gfx_render(uint32 bufferIndex, uint32 width)
|
||||||
pixel_out = READ_BYTE(Pico_mcd->word_ram2M, stamp_index >> 1);
|
pixel_out = READ_BYTE(Pico_mcd->word_ram2M, stamp_index >> 1);
|
||||||
|
|
||||||
/* extract left or rigth pixel */
|
/* extract left or rigth pixel */
|
||||||
if (stamp_index & 1)
|
if (!(stamp_index & 1))
|
||||||
{
|
|
||||||
pixel_out &= 0x0f;
|
|
||||||
}
|
|
||||||
else
|
|
||||||
{
|
{
|
||||||
pixel_out >>= 4;
|
pixel_out >>= 4;
|
||||||
}
|
}
|
||||||
|
pixel_out &= 0x0f;
|
||||||
}
|
}
|
||||||
else
|
}
|
||||||
|
|
||||||
|
return pixel_out;
|
||||||
|
}
|
||||||
|
|
||||||
|
#define RENDER_LOOP(N, UPDP, COND1, COND2) do { \
|
||||||
|
if (bufferIndex & 1) { \
|
||||||
|
bufferIndex &= ~1; \
|
||||||
|
goto right##N; /* no initial left pixel */ \
|
||||||
|
} \
|
||||||
|
/* process all dots */ \
|
||||||
|
while (width--) \
|
||||||
|
{ \
|
||||||
|
/* left pixel */ \
|
||||||
|
xpos &= mask; \
|
||||||
|
ypos &= mask; \
|
||||||
|
\
|
||||||
|
if (COND1) { \
|
||||||
|
pixel_out = gfx_pixel(xpos, ypos, lut_cell); \
|
||||||
|
UPDP; \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
if (COND2) { \
|
||||||
|
/* read out paired pixel data */ \
|
||||||
|
pixel_in = READ_BYTE(Pico_mcd->word_ram2M, bufferIndex >> 1); \
|
||||||
|
\
|
||||||
|
/* priority mode write */ \
|
||||||
|
pixel_in = (lut_prio[(pixel_in & 0xf0) >> 4][pixel_out] << 4) | \
|
||||||
|
(pixel_in & 0x0f); \
|
||||||
|
\
|
||||||
|
/* write data to image buffer */ \
|
||||||
|
WRITE_BYTE(Pico_mcd->word_ram2M, bufferIndex >> 1, pixel_in); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
/* increment pixel position */ \
|
||||||
|
xpos += xoffset; \
|
||||||
|
ypos += yoffset; \
|
||||||
|
\
|
||||||
|
right##N: \
|
||||||
|
if (width-- == 0) break; \
|
||||||
|
\
|
||||||
|
/* right pixel */ \
|
||||||
|
xpos &= mask; \
|
||||||
|
ypos &= mask; \
|
||||||
|
\
|
||||||
|
if (COND1) { \
|
||||||
|
pixel_out = gfx_pixel(xpos, ypos, lut_cell); \
|
||||||
|
UPDP; \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
if (COND2) { \
|
||||||
|
/* read out paired pixel data */ \
|
||||||
|
pixel_in = READ_BYTE(Pico_mcd->word_ram2M, bufferIndex >> 1); \
|
||||||
|
\
|
||||||
|
/* priority mode write */ \
|
||||||
|
pixel_in = (lut_prio[pixel_in & 0x0f][pixel_out]) | \
|
||||||
|
(pixel_in & 0xf0); \
|
||||||
|
\
|
||||||
|
/* write data to image buffer */ \
|
||||||
|
WRITE_BYTE(Pico_mcd->word_ram2M, bufferIndex >> 1, pixel_in); \
|
||||||
|
} \
|
||||||
|
\
|
||||||
|
/* increment pixel position */ \
|
||||||
|
xpos += xoffset; \
|
||||||
|
ypos += yoffset; \
|
||||||
|
\
|
||||||
|
/* next pixel */ \
|
||||||
|
bufferIndex += 2; \
|
||||||
|
/* check current pixel position */ \
|
||||||
|
if ((bufferIndex & 7) == 0) \
|
||||||
|
{ \
|
||||||
|
/* next cell: increment buffer offset by one column (minus 8 pixels) */ \
|
||||||
|
bufferIndex += gfx.bufferOffset-1; \
|
||||||
|
} \
|
||||||
|
} \
|
||||||
|
} while (0)
|
||||||
|
|
||||||
|
static void gfx_render(uint32 bufferIndex, uint32 width)
|
||||||
|
{
|
||||||
|
uint8 pixel_in, pixel_out;
|
||||||
|
uint32 priority;
|
||||||
|
uint8 (*lut_prio)[0x10];
|
||||||
|
uint16 *lut_cell;
|
||||||
|
uint32 mask;
|
||||||
|
|
||||||
|
/* pixel map start position for current line (13.3 format converted to 13.11) */
|
||||||
|
uint32 xpos = *gfx.tracePtr++ << 8;
|
||||||
|
uint32 ypos = *gfx.tracePtr++ << 8;
|
||||||
|
|
||||||
|
/* pixel map offset values for current line (5.11 format) */
|
||||||
|
uint32 xoffset = (int16) *gfx.tracePtr++;
|
||||||
|
uint32 yoffset = (int16) *gfx.tracePtr++;
|
||||||
|
|
||||||
|
priority = (Pico_mcd->s68k_regs[2] << 8) | Pico_mcd->s68k_regs[3];
|
||||||
|
priority = (priority >> 3) & 0x03;
|
||||||
|
lut_prio = gfx.lut_prio[priority];
|
||||||
|
|
||||||
|
lut_cell = (Pico_mcd->s68k_regs[0x58+1] & 0x02) ? gfx.lut_cell4 : gfx.lut_cell2;
|
||||||
|
|
||||||
|
/* check if stamp map is repeated */
|
||||||
|
mask = 0xffffff; /* 24-bit range */
|
||||||
|
if (Pico_mcd->s68k_regs[0x58+1] & 0x01)
|
||||||
{
|
{
|
||||||
/* stamp 0 is not used: force pixel output to 0 */
|
/* stamp map range */
|
||||||
pixel_out = 0x00;
|
mask = gfx.dotMask;
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|
||||||
/* read out paired pixel data */
|
pixel_out = 0;
|
||||||
pixel_in = READ_BYTE(Pico_mcd->word_ram2M, bufferIndex >> 1);
|
if (xoffset+(1U<<10) <= 1U<<11 && yoffset+(1U<<10) <= 1U<<11) {
|
||||||
|
/* upscaling >= 2x, test for duplicate pixels to avoid recalculation */
|
||||||
/* update left or rigth pixel */
|
uint32 oldx, oldy;
|
||||||
if (bufferIndex & 1)
|
oldx = oldy = ~xpos;
|
||||||
{
|
RENDER_LOOP(1, oldx = xpos;oldy = ypos, (oldx^xpos ^ oldy^ypos) >> 11, (!priority) | pixel_out);
|
||||||
/* priority mode write */
|
} else {
|
||||||
pixel_out = gfx.lut_prio[priority][pixel_in & 0x0f][pixel_out];
|
RENDER_LOOP(3, , 1, (!priority) | pixel_out);
|
||||||
|
|
||||||
pixel_out |= (pixel_in & 0xf0);
|
|
||||||
}
|
|
||||||
else
|
|
||||||
{
|
|
||||||
/* priority mode write */
|
|
||||||
pixel_out = gfx.lut_prio[priority][pixel_in >> 4][pixel_out];
|
|
||||||
|
|
||||||
pixel_out = (pixel_out << 4) | (pixel_in & 0x0f);
|
|
||||||
}
|
|
||||||
|
|
||||||
/* write data to image buffer */
|
|
||||||
WRITE_BYTE(Pico_mcd->word_ram2M, bufferIndex >> 1, pixel_out);
|
|
||||||
|
|
||||||
/* check current pixel position */
|
|
||||||
if ((bufferIndex & 7) != 7)
|
|
||||||
{
|
|
||||||
/* next pixel */
|
|
||||||
bufferIndex++;
|
|
||||||
}
|
|
||||||
else
|
|
||||||
{
|
|
||||||
/* next cell: increment image buffer offset by one column (minus 7 pixels) */
|
|
||||||
bufferIndex += gfx.bufferOffset;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* increment pixel position */
|
|
||||||
xpos += xoffset;
|
|
||||||
ypos += yoffset;
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue