shithub: orca

ref: 2c9c2ed710ed586b58d0f9958fdde32146733aec
dir: /gbuffer.h/

#pragma once
#include "base.h"

ORCA_PURE static inline Glyph gbuffer_peek_relative(Glyph *gbuf, Usz height,
                                                    Usz width, Usz y, Usz x,
                                                    Isz delta_y, Isz delta_x) {
  Isz y0 = (Isz)y + delta_y;
  Isz x0 = (Isz)x + delta_x;
  if (y0 < 0 || x0 < 0 || (Usz)y0 >= height || (Usz)x0 >= width)
    return '.';
  return gbuf[(Usz)y0 * width + (Usz)x0];
}

static inline void gbuffer_poke(Glyph *gbuf, Usz height, Usz width, Usz y,
                                Usz x, Glyph g) {
  assert(y < height && x < width);
  (void)height;
  gbuf[y * width + x] = g;
}

static inline void gbuffer_poke_relative(Glyph *gbuf, Usz height, Usz width,
                                         Usz y, Usz x, Isz delta_y, Isz delta_x,
                                         Glyph g) {
  Isz y0 = (Isz)y + delta_y;
  Isz x0 = (Isz)x + delta_x;
  if (y0 < 0 || x0 < 0 || (Usz)y0 >= height || (Usz)x0 >= width)
    return;
  gbuf[(Usz)y0 * width + (Usz)x0] = g;
}

ORCA_NOINLINE
void gbuffer_copy_subrect(Glyph *src, Glyph *dest, Usz src_grid_h,
                          Usz src_grid_w, Usz dest_grid_h, Usz dest_grid_w,
                          Usz src_y, Usz src_x, Usz dest_y, Usz dest_x,
                          Usz height, Usz width);

ORCA_NOINLINE
void gbuffer_fill_subrect(Glyph *gbuf, Usz grid_h, Usz grid_w, Usz y, Usz x,
                          Usz height, Usz width, Glyph fill_char);

typedef enum {
  Mark_flag_none = 0,
  Mark_flag_input = 1 << 0,
  Mark_flag_output = 1 << 1,
  Mark_flag_haste_input = 1 << 2,
  Mark_flag_lock = 1 << 3,
  Mark_flag_sleep = 1 << 4,
} Mark_flags;

ORCA_OK_IF_UNUSED
static Mark_flags mbuffer_peek(Mark *mbuf, Usz height, Usz width, Usz y,
                               Usz x) {
  (void)height;
  return mbuf[y * width + x];
}

ORCA_OK_IF_UNUSED
static Mark_flags mbuffer_peek_relative(Mark *mbuf, Usz height, Usz width,
                                        Usz y, Usz x, Isz offs_y, Isz offs_x) {
  Isz y0 = (Isz)y + offs_y;
  Isz x0 = (Isz)x + offs_x;
  if (y0 >= (Isz)height || x0 >= (Isz)width || y0 < 0 || x0 < 0)
    return Mark_flag_none;
  return mbuf[(Usz)y0 * width + (Usz)x0];
}

ORCA_OK_IF_UNUSED
static void mbuffer_poke_flags_or(Mark *mbuf, Usz height, Usz width, Usz y,
                                  Usz x, Mark_flags flags) {
  (void)height;
  mbuf[y * width + x] |= (Mark)flags;
}

ORCA_OK_IF_UNUSED
static void mbuffer_poke_relative_flags_or(Mark *mbuf, Usz height, Usz width,
                                           Usz y, Usz x, Isz offs_y, Isz offs_x,
                                           Mark_flags flags) {
  Isz y0 = (Isz)y + offs_y;
  Isz x0 = (Isz)x + offs_x;
  if (y0 >= (Isz)height || x0 >= (Isz)width || y0 < 0 || x0 < 0)
    return;
  mbuf[(Usz)y0 * width + (Usz)x0] |= (Mark)flags;
}

void mbuffer_clear(Mark *mbuf, Usz height, Usz width);