initial commit

src/lua/pxl8.lua

@@ -0,0 +1,192 @@
+local ffi = require("ffi")
+local C = ffi.C
+local gfx = _pxl8_gfx_ctx
+local input = _pxl8_input_ctx
+
+-- pxl8 lua api
+--
+local pxl8 = {}
+
+function pxl8.clr(color)
+    C.pxl8_clr(gfx, color or 0)
+end
+
+function pxl8.pixel(x, y, color)
+    if color then
+        C.pxl8_pixel(gfx, x, y, color)
+    else
+        return C.pxl8_get_pixel(gfx, x, y)
+    end
+end
+
+function pxl8.line(x0, y0, x1, y1, color)
+    C.pxl8_line(gfx, x0, y0, x1, y1, color)
+end
+
+function pxl8.rect(x, y, w, h, color)
+    C.pxl8_rect(gfx, x, y, w, h, color)
+end
+
+function pxl8.rect_fill(x, y, w, h, color)
+    C.pxl8_rect_fill(gfx, x, y, w, h, color)
+end
+
+function pxl8.circle(x, y, r, color)
+    C.pxl8_circle(gfx, x, y, r, color)
+end
+
+function pxl8.circle_fill(x, y, r, color)
+    C.pxl8_circle_fill(gfx, x, y, r, color)
+end
+
+function pxl8.text(str, x, y, color)
+    C.pxl8_text(gfx, str, x or 0, y or 0, color or 15)
+end
+
+function pxl8.sprite(id, x, y, w, h, flip_x, flip_y)
+    C.pxl8_sprite(gfx, id or 0, x or 0, y or 0, w or 16, h or 16, flip_x or false, flip_y or false)
+end
+
+function pxl8.get_screen()
+    return C.pxl8_get_screen(gfx)
+end
+
+function pxl8.load_palette(filepath)
+    return C.pxl8_gfx_load_palette(gfx, filepath)
+end
+
+function pxl8.load_sprite(filepath)
+    local sprite_id = ffi.new("unsigned int[1]")
+    local result = C.pxl8_gfx_load_sprite(gfx, filepath, sprite_id)
+    if result == 0 then
+        return sprite_id[0]
+    else
+        return nil, result
+    end
+end
+
+-- log
+function pxl8.info(msg)
+    C.pxl8_lua_info(msg)
+end
+
+function pxl8.warn(msg)
+    C.pxl8_lua_warn(msg)
+end
+
+function pxl8.error(msg)
+    C.pxl8_lua_error(msg)
+end
+
+function pxl8.debug(msg)
+    C.pxl8_lua_debug(msg)
+end
+
+function pxl8.trace(msg)
+    C.pxl8_lua_trace(msg)
+end
+
+function pxl8.key_down(key)
+    if type(key) == "string" then
+        key = string.byte(key)
+    end
+    return C.pxl8_key_down(input, key)
+end
+
+function pxl8.key_pressed(key)
+    if type(key) == "string" then
+        key = string.byte(key)
+    end
+    return C.pxl8_key_pressed(input, key)
+end
+
+function pxl8.vfx_copper_bars(bars, time)
+    local c_bars = ffi.new("pxl8_copper_bar[?]", #bars)
+    for i, bar in ipairs(bars) do
+        c_bars[i-1].base_y = bar.base_y or 0
+        c_bars[i-1].amplitude = bar.amplitude or 10
+        c_bars[i-1].height = bar.height or 5
+        c_bars[i-1].speed = bar.speed or 1.0
+        c_bars[i-1].phase = bar.phase or 0
+        c_bars[i-1].color = bar.color or 15
+        c_bars[i-1].fade_color = bar.fade_color or bar.color or 15
+    end
+    C.pxl8_vfx_copper_bars(gfx, c_bars, #bars, time)
+end
+
+function pxl8.vfx_plasma(time, scale1, scale2, palette_offset)
+    C.pxl8_vfx_plasma(gfx, time, scale1 or 0.05, scale2 or 0.03, palette_offset or 0)
+end
+
+function pxl8.vfx_rotozoom(angle, zoom, cx, cy)
+    local screen = pxl8.get_screen()
+    C.pxl8_vfx_rotozoom(gfx, angle, zoom, cx or screen.width/2, cy or screen.height/2)
+end
+
+function pxl8.vfx_tunnel(time, speed, twist)
+    C.pxl8_vfx_tunnel(gfx, time, speed or 2.0, twist or 0.5)
+end
+
+function pxl8.particles_new(max_count)
+    local ps = ffi.new("pxl8_particle_system")
+    C.pxl8_vfx_particles_init(ps, max_count or 1000)
+    return ps
+end
+
+function pxl8.particles_destroy(ps)
+    C.pxl8_vfx_particles_destroy(ps)
+end
+
+function pxl8.particles_clear(ps)
+    C.pxl8_vfx_particles_clear(ps)
+end
+
+function pxl8.particles_emit(ps, count)
+    C.pxl8_vfx_particles_emit(ps, count or 1)
+end
+
+function pxl8.particles_update(ps, dt)
+    C.pxl8_vfx_particles_update(ps, dt)
+end
+
+function pxl8.particles_render(ps)
+    C.pxl8_vfx_particles_render(ps, gfx)
+end
+
+function pxl8.vfx_explosion(ps, x, y, color, force)
+    C.pxl8_vfx_explosion(ps, x, y, color or 15, force or 200.0)
+end
+
+function pxl8.vfx_fire(ps, x, y, width, palette_start)
+    C.pxl8_vfx_fire(ps, x, y, width or 50, palette_start or 64)
+end
+
+function pxl8.vfx_rain(ps, width, wind)
+    C.pxl8_vfx_rain(ps, width or pxl8.get_screen().width, wind or 0.0)
+end
+
+function pxl8.vfx_smoke(ps, x, y, color)
+    C.pxl8_vfx_smoke(ps, x, y, color or 8)
+end
+
+function pxl8.vfx_snow(ps, width, wind)
+    C.pxl8_vfx_snow(ps, width or pxl8.get_screen().width, wind or 10.0)
+end
+
+function pxl8.vfx_sparks(ps, x, y, color)
+    C.pxl8_vfx_sparks(ps, x, y, color or 15)
+end
+
+function pxl8.vfx_starfield(ps, speed, spread)
+    C.pxl8_vfx_starfield(ps, speed or 5.0, spread or 500.0)
+end
+
+function pxl8.gfx_color_ramp(start, count, from_color, to_color)
+    C.pxl8_gfx_color_ramp(gfx, start, count, from_color, to_color)
+end
+
+function pxl8.gfx_fade_palette(start, count, amount, target_color)
+    C.pxl8_gfx_fade_palette(gfx, start, count, amount, target_color)
+end
+
+return pxl8