ref: 9435ca2b06a5108b9314e700967ad4cb97ca791f
dir: /src/ft2_scopedraw.c/
#include "ft2_scopes.h"
#include "ft2_scopedraw.h"
#include "ft2_video.h"
#include "ft2_palette.h"
/* ----------------------------------------------------------------------- */
/* SCOPE DRAWING MACROS */
/* ----------------------------------------------------------------------- */
#define SCOPE_REGS_NO_LOOP \
const int32_t vol = s->vol; \
const int32_t end = s->end; \
const uint32_t delta = s->drawDelta; \
const uint32_t color = video.palette[PAL_PATTEXT]; \
const uint32_t width = x + w; \
int32_t sample; \
int32_t pos = s->pos; \
int32_t posFrac = 0; \
#define SCOPE_REGS_LOOP \
const int32_t vol = s->vol; \
const int32_t end = s->end; \
const int32_t loopStart = s->loopStart; \
const int32_t loopLength = s->loopLength; \
const uint32_t delta = s->drawDelta; \
const uint32_t color = video.palette[PAL_PATTEXT]; \
const uint32_t width = x + w; \
int32_t sample; \
int32_t pos = s->pos; \
int32_t posFrac = 0; \
#define SCOPE_REGS_PINGPONG \
const int32_t vol = s->vol; \
const int32_t end = s->end; \
const int32_t loopStart = s->loopStart; \
const int32_t loopLength = s->loopLength; \
const uint32_t delta = s->drawDelta; \
const uint32_t color = video.palette[PAL_PATTEXT]; \
const uint32_t width = x + w; \
int32_t sample; \
int32_t pos = s->pos; \
int32_t posFrac = 0; \
int32_t direction = s->direction; \
#define LINED_SCOPE_REGS_NO_LOOP \
const int32_t vol = s->vol; \
const int32_t end = s->end; \
const uint32_t delta = s->drawDelta; \
const uint32_t width = (x + w) - 1; \
int32_t sample; \
int32_t y1, y2; \
int32_t pos = s->pos; \
int32_t posFrac = 0; \
#define LINED_SCOPE_REGS_LOOP \
const int32_t vol = s->vol; \
const int32_t end = s->end; \
const int32_t loopStart = s->loopStart; \
const int32_t loopLength = s->loopLength; \
const uint32_t delta = s->drawDelta; \
const uint32_t width = (x + w) - 1; \
int32_t sample; \
int32_t y1, y2; \
int32_t pos = s->pos; \
int32_t posFrac = 0; \
#define LINED_SCOPE_REGS_PINGPONG \
const int32_t vol = s->vol; \
const int32_t end = s->end; \
const int32_t loopStart = s->loopStart; \
const int32_t loopLength = s->loopLength; \
const uint32_t delta = s->drawDelta; \
const uint32_t width = (x + w) - 1; \
int32_t sample; \
int32_t y1, y2; \
int32_t pos = s->pos; \
int32_t posFrac = 0; \
int32_t direction = s->direction; \
#define SCOPE_GET_SMP8 \
if (s->active) \
{ \
assert(pos >= 0 && pos < end); \
sample = (s->base8[pos] * vol) >> 8; \
} \
else \
{ \
sample = 0; \
} \
#define SCOPE_GET_SMP16 \
if (s->active) \
{ \
assert(pos >= 0 && pos < end); \
sample = (int8_t)((s->base16[pos] * vol) >> 16); \
} \
else \
{ \
sample = 0; \
} \
#define SCOPE_UPDATE_DRAWPOS \
posFrac += delta; \
pos += posFrac >> SCOPE_DRAW_FRAC_BITS; \
posFrac &= SCOPE_DRAW_FRAC_MASK; \
#define SCOPE_UPDATE_DRAWPOS_PINGPONG \
posFrac += delta; \
pos += (int32_t)(posFrac >> SCOPE_DRAW_FRAC_BITS) * direction; \
posFrac &= SCOPE_DRAW_FRAC_MASK; \
#define SCOPE_DRAW_SMP \
video.frameBuffer[((lineY - sample) * SCREEN_W) + x] = color;
#define LINED_SCOPE_PREPARE_SMP8 \
SCOPE_GET_SMP8 \
y1 = lineY - sample; \
SCOPE_UPDATE_DRAWPOS
#define LINED_SCOPE_PREPARE_SMP16 \
SCOPE_GET_SMP16 \
y1 = lineY - sample; \
SCOPE_UPDATE_DRAWPOS
#define LINED_SCOPE_DRAW_SMP \
y2 = lineY - sample; \
scopeLine(x, y1, y2); \
y1 = y2; \
#define SCOPE_HANDLE_POS_NO_LOOP \
if (pos >= end) \
s->active = false; \
#define SCOPE_HANDLE_POS_LOOP \
if (pos >= end) \
{ \
if (loopLength >= 2) \
pos = loopStart + ((pos - end) % loopLength); \
else \
pos = loopStart; \
\
assert(pos >= loopStart && pos < end); \
} \
#define SCOPE_HANDLE_POS_PINGPONG \
if (direction == -1 && pos < loopStart) \
{ \
direction = 1; /* change direction to forwards */ \
\
if (loopLength >= 2) \
pos = loopStart + ((loopStart - pos - 1) % loopLength); \
else \
pos = loopStart; \
\
assert(pos >= loopStart && pos < end); \
} \
else if (pos >= end) \
{ \
direction = -1; /* change direction to backwards */ \
\
if (loopLength >= 2) \
pos = (end - 1) - ((pos - end) % loopLength); \
else \
pos = end - 1; \
\
assert(pos >= loopStart && pos < end); \
} \
assert(pos >= 0); \
static void scopeLine(int32_t x1, int32_t y1, int32_t y2)
{
const int32_t dy = y2 - y1;
const int32_t sy = SGN(dy);
const uint32_t color = video.palette[PAL_PATTEXT];
const int32_t pitch = sy * SCREEN_W;
uint32_t *dst32 = &video.frameBuffer[(y1 * SCREEN_W) + x1];
*dst32 = color; // set first pixel
int32_t ay = ABS(dy);
if (ay <= 1)
{
if (ay != 0)
dst32 += pitch;
*++dst32 = color;
return;
}
int32_t d = 1 - ay;
ay <<= 1;
while (y1 != y2)
{
if (d >= 0)
{
d -= ay;
dst32++;
}
y1 += sy;
d += 2;
dst32 += pitch;
*dst32 = color;
}
}
/* ----------------------------------------------------------------------- */
/* SCOPE DRAWING ROUTINES */
/* ----------------------------------------------------------------------- */
static void scopeDrawNoLoop_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{
SCOPE_REGS_NO_LOOP
for (; x < width; x++)
{
SCOPE_GET_SMP8
SCOPE_DRAW_SMP
SCOPE_UPDATE_DRAWPOS
SCOPE_HANDLE_POS_NO_LOOP
}
}
static void scopeDrawLoop_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{
SCOPE_REGS_LOOP
for (; x < width; x++)
{
SCOPE_GET_SMP8
SCOPE_DRAW_SMP
SCOPE_UPDATE_DRAWPOS
SCOPE_HANDLE_POS_LOOP
}
}
static void scopeDrawPingPong_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{
SCOPE_REGS_PINGPONG
for (; x < width; x++)
{
SCOPE_GET_SMP8
SCOPE_DRAW_SMP
SCOPE_UPDATE_DRAWPOS_PINGPONG
SCOPE_HANDLE_POS_PINGPONG
}
}
static void scopeDrawNoLoop_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{
SCOPE_REGS_NO_LOOP
for (; x < width; x++)
{
SCOPE_GET_SMP16
SCOPE_DRAW_SMP
SCOPE_UPDATE_DRAWPOS
SCOPE_HANDLE_POS_NO_LOOP
}
}
static void scopeDrawLoop_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{
SCOPE_REGS_LOOP
for (; x < width; x++)
{
SCOPE_GET_SMP16
SCOPE_DRAW_SMP
SCOPE_UPDATE_DRAWPOS
SCOPE_HANDLE_POS_LOOP
}
}
static void scopeDrawPingPong_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{
SCOPE_REGS_PINGPONG
for (; x < width; x++)
{
SCOPE_GET_SMP16
SCOPE_DRAW_SMP
SCOPE_UPDATE_DRAWPOS_PINGPONG
SCOPE_HANDLE_POS_PINGPONG
}
}
/* ----------------------------------------------------------------------- */
/* LINED SCOPE DRAWING ROUTINES */
/* ----------------------------------------------------------------------- */
static void linedScopeDrawNoLoop_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{
LINED_SCOPE_REGS_NO_LOOP
LINED_SCOPE_PREPARE_SMP8
SCOPE_HANDLE_POS_NO_LOOP
for (; x < width; x++)
{
SCOPE_GET_SMP8
LINED_SCOPE_DRAW_SMP
SCOPE_UPDATE_DRAWPOS
SCOPE_HANDLE_POS_NO_LOOP
}
}
static void linedScopeDrawLoop_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{
LINED_SCOPE_REGS_LOOP
LINED_SCOPE_PREPARE_SMP8
SCOPE_HANDLE_POS_LOOP
for (; x < width; x++)
{
SCOPE_GET_SMP8
LINED_SCOPE_DRAW_SMP
SCOPE_UPDATE_DRAWPOS
SCOPE_HANDLE_POS_LOOP
}
}
static void linedScopeDrawPingPong_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{
LINED_SCOPE_REGS_PINGPONG
LINED_SCOPE_PREPARE_SMP8
SCOPE_HANDLE_POS_PINGPONG
for (; x < width; x++)
{
SCOPE_GET_SMP8
LINED_SCOPE_DRAW_SMP
SCOPE_UPDATE_DRAWPOS_PINGPONG
SCOPE_HANDLE_POS_PINGPONG
}
}
static void linedScopeDrawNoLoop_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{
LINED_SCOPE_REGS_NO_LOOP
LINED_SCOPE_PREPARE_SMP16
SCOPE_HANDLE_POS_NO_LOOP
for (; x < width; x++)
{
SCOPE_GET_SMP16
LINED_SCOPE_DRAW_SMP
SCOPE_UPDATE_DRAWPOS
SCOPE_HANDLE_POS_NO_LOOP
}
}
static void linedScopeDrawLoop_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{
LINED_SCOPE_REGS_LOOP
LINED_SCOPE_PREPARE_SMP16
SCOPE_HANDLE_POS_LOOP
for (; x < width; x++)
{
SCOPE_GET_SMP16
LINED_SCOPE_DRAW_SMP
SCOPE_UPDATE_DRAWPOS
SCOPE_HANDLE_POS_LOOP
}
}
static void linedScopeDrawPingPong_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{
LINED_SCOPE_REGS_PINGPONG
LINED_SCOPE_PREPARE_SMP16
SCOPE_HANDLE_POS_PINGPONG
for (; x < width; x++)
{
SCOPE_GET_SMP16
LINED_SCOPE_DRAW_SMP
SCOPE_UPDATE_DRAWPOS_PINGPONG
SCOPE_HANDLE_POS_PINGPONG
}
}
// -----------------------------------------------------------------------
const scopeDrawRoutine scopeDrawRoutineTable[12] =
{
(scopeDrawRoutine)scopeDrawNoLoop_8bit,
(scopeDrawRoutine)scopeDrawLoop_8bit,
(scopeDrawRoutine)scopeDrawPingPong_8bit,
(scopeDrawRoutine)scopeDrawNoLoop_16bit,
(scopeDrawRoutine)scopeDrawLoop_16bit,
(scopeDrawRoutine)scopeDrawPingPong_16bit,
(scopeDrawRoutine)linedScopeDrawNoLoop_8bit,
(scopeDrawRoutine)linedScopeDrawLoop_8bit,
(scopeDrawRoutine)linedScopeDrawPingPong_8bit,
(scopeDrawRoutine)linedScopeDrawNoLoop_16bit,
(scopeDrawRoutine)linedScopeDrawLoop_16bit,
(scopeDrawRoutine)linedScopeDrawPingPong_16bit
};