ref: 8af2e42736b61a36a0d54bede93a47a1bab35f5d
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 };