324 lines
9.1 KiB
C
324 lines
9.1 KiB
C
#include <string.h>
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#include "api.h"
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#include "renderer.h"
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#include "rencache.h"
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static int font_get_options(
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lua_State *L,
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ERenFontAntialiasing *antialiasing,
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ERenFontHinting *hinting,
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int *style
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) {
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if (lua_gettop(L) > 2 && lua_istable(L, 3)) {
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lua_getfield(L, 3, "antialiasing");
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if (lua_isstring(L, -1)) {
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const char *antialiasing_str = lua_tostring(L, -1);
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if (antialiasing_str) {
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if (strcmp(antialiasing_str, "none") == 0) {
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*antialiasing = FONT_ANTIALIASING_NONE;
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} else if (strcmp(antialiasing_str, "grayscale") == 0) {
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*antialiasing = FONT_ANTIALIASING_GRAYSCALE;
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} else if (strcmp(antialiasing_str, "subpixel") == 0) {
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*antialiasing = FONT_ANTIALIASING_SUBPIXEL;
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} else {
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return luaL_error(
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L,
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"error in font options, unknown antialiasing option: \"%s\"",
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antialiasing_str
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);
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}
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}
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}
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lua_getfield(L, 3, "hinting");
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if (lua_isstring(L, -1)) {
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const char *hinting_str = lua_tostring(L, -1);
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if (hinting_str) {
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if (strcmp(hinting_str, "slight") == 0) {
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*hinting = FONT_HINTING_SLIGHT;
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} else if (strcmp(hinting_str, "none") == 0) {
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*hinting = FONT_HINTING_NONE;
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} else if (strcmp(hinting_str, "full") == 0) {
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*hinting = FONT_HINTING_FULL;
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} else {
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return luaL_error(
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L,
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"error in font options, unknown hinting option: \"%s\"",
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hinting
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);
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}
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}
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}
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int style_local = 0;
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lua_getfield(L, 3, "italic");
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if (lua_toboolean(L, -1))
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style_local |= FONT_STYLE_ITALIC;
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lua_getfield(L, 3, "bold");
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if (lua_toboolean(L, -1))
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style_local |= FONT_STYLE_BOLD;
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lua_getfield(L, 3, "underline");
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if (lua_toboolean(L, -1))
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style_local |= FONT_STYLE_UNDERLINE;
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lua_getfield(L, 3, "smoothing");
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if (lua_toboolean(L, -1))
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style_local |= FONT_STYLE_SMOOTH;
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lua_getfield(L, 3, "strikethrough");
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if (lua_toboolean(L, -1))
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style_local |= FONT_STYLE_STRIKETHROUGH;
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lua_pop(L, 5);
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if (style_local != 0)
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*style = style_local;
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}
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return 0;
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}
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static int f_font_load(lua_State *L) {
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const char *filename = luaL_checkstring(L, 1);
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float size = luaL_checknumber(L, 2);
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int style = 0;
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ERenFontHinting hinting = FONT_HINTING_SLIGHT;
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ERenFontAntialiasing antialiasing = FONT_ANTIALIASING_SUBPIXEL;
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int ret_code = font_get_options(L, &antialiasing, &hinting, &style);
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if (ret_code > 0)
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return ret_code;
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RenFont** font = lua_newuserdata(L, sizeof(RenFont*));
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*font = ren_font_load(filename, size, antialiasing, hinting, style);
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if (!*font)
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return luaL_error(L, "failed to load font");
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luaL_setmetatable(L, API_TYPE_FONT);
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return 1;
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}
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static bool font_retrieve(lua_State* L, RenFont** fonts, int idx) {
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memset(fonts, 0, sizeof(RenFont*)*FONT_FALLBACK_MAX);
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if (lua_type(L, idx) != LUA_TTABLE) {
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fonts[0] = *(RenFont**)luaL_checkudata(L, idx, API_TYPE_FONT);
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return false;
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}
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int len = luaL_len(L, idx); len = len > FONT_FALLBACK_MAX ? FONT_FALLBACK_MAX : len;
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for (int i = 0; i < len; i++) {
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lua_rawgeti(L, idx, i+1);
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fonts[i] = *(RenFont**) luaL_checkudata(L, -1, API_TYPE_FONT);
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lua_pop(L, 1);
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}
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return true;
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}
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static int f_font_copy(lua_State *L) {
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RenFont* fonts[FONT_FALLBACK_MAX];
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bool table = font_retrieve(L, fonts, 1);
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float size = lua_gettop(L) >= 2 ? luaL_checknumber(L, 2) : ren_font_group_get_height(fonts);
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int style = -1;
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ERenFontHinting hinting = -1;
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ERenFontAntialiasing antialiasing = -1;
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int ret_code = font_get_options(L, &antialiasing, &hinting, &style);
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if (ret_code > 0)
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return ret_code;
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if (table) {
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lua_newtable(L);
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luaL_setmetatable(L, API_TYPE_FONT);
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}
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for (int i = 0; i < FONT_FALLBACK_MAX && fonts[i]; ++i) {
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RenFont** font = lua_newuserdata(L, sizeof(RenFont*));
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*font = ren_font_copy(fonts[i], size, antialiasing, hinting, style);
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if (!*font)
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return luaL_error(L, "failed to copy font");
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luaL_setmetatable(L, API_TYPE_FONT);
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if (table)
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lua_rawseti(L, -2, i+1);
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}
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return 1;
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}
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static int f_font_group(lua_State* L) {
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luaL_checktype(L, 1, LUA_TTABLE);
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luaL_setmetatable(L, API_TYPE_FONT);
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return 1;
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}
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static int f_font_get_path(lua_State *L) {
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RenFont* fonts[FONT_FALLBACK_MAX];
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bool table = font_retrieve(L, fonts, 1);
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if (table) {
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lua_newtable(L);
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}
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for (int i = 0; i < FONT_FALLBACK_MAX && fonts[i]; ++i) {
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const char* path = ren_font_get_path(fonts[i]);
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lua_pushstring(L, path);
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if (table)
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lua_rawseti(L, -2, i+1);
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}
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return 1;
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}
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static int f_font_set_tab_size(lua_State *L) {
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RenFont* fonts[FONT_FALLBACK_MAX]; font_retrieve(L, fonts, 1);
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int n = luaL_checknumber(L, 2);
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ren_font_group_set_tab_size(fonts, n);
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return 0;
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}
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static int f_font_gc(lua_State *L) {
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if (lua_istable(L, 1)) return 0; // do not run if its FontGroup
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RenFont** self = luaL_checkudata(L, 1, API_TYPE_FONT);
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ren_font_free(*self);
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return 0;
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}
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static int f_font_get_width(lua_State *L) {
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RenFont* fonts[FONT_FALLBACK_MAX]; font_retrieve(L, fonts, 1);
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lua_pushnumber(L, ren_font_group_get_width(fonts, luaL_checkstring(L, 2)));
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return 1;
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}
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static int f_font_get_height(lua_State *L) {
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RenFont* fonts[FONT_FALLBACK_MAX]; font_retrieve(L, fonts, 1);
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lua_pushnumber(L, ren_font_group_get_height(fonts));
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return 1;
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}
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static int f_font_get_size(lua_State *L) {
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RenFont* fonts[FONT_FALLBACK_MAX]; font_retrieve(L, fonts, 1);
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lua_pushnumber(L, ren_font_group_get_size(fonts));
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return 1;
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}
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static int f_font_set_size(lua_State *L) {
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RenFont* fonts[FONT_FALLBACK_MAX]; font_retrieve(L, fonts, 1);
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float size = luaL_checknumber(L, 2);
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ren_font_group_set_size(fonts, size);
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return 0;
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}
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static RenColor checkcolor(lua_State *L, int idx, int def) {
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RenColor color;
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if (lua_isnoneornil(L, idx)) {
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return (RenColor) { def, def, def, 255 };
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}
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lua_rawgeti(L, idx, 1);
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lua_rawgeti(L, idx, 2);
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lua_rawgeti(L, idx, 3);
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lua_rawgeti(L, idx, 4);
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color.r = luaL_checknumber(L, -4);
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color.g = luaL_checknumber(L, -3);
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color.b = luaL_checknumber(L, -2);
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color.a = luaL_optnumber(L, -1, 255);
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lua_pop(L, 4);
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return color;
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}
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static int f_show_debug(lua_State *L) {
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luaL_checkany(L, 1);
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rencache_show_debug(lua_toboolean(L, 1));
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return 0;
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}
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static int f_get_size(lua_State *L) {
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int w, h;
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ren_get_size(&w, &h);
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lua_pushnumber(L, w);
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lua_pushnumber(L, h);
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return 2;
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}
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static int f_begin_frame(UNUSED lua_State *L) {
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rencache_begin_frame();
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return 0;
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}
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static int f_end_frame(UNUSED lua_State *L) {
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rencache_end_frame();
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return 0;
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}
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static RenRect rect_to_grid(lua_Number x, lua_Number y, lua_Number w, lua_Number h) {
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int x1 = (int) (x + 0.5), y1 = (int) (y + 0.5);
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int x2 = (int) (x + w + 0.5), y2 = (int) (y + h + 0.5);
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return (RenRect) {x1, y1, x2 - x1, y2 - y1};
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}
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static int f_set_clip_rect(lua_State *L) {
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lua_Number x = luaL_checknumber(L, 1);
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lua_Number y = luaL_checknumber(L, 2);
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lua_Number w = luaL_checknumber(L, 3);
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lua_Number h = luaL_checknumber(L, 4);
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RenRect rect = rect_to_grid(x, y, w, h);
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rencache_set_clip_rect(rect);
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return 0;
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}
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static int f_draw_rect(lua_State *L) {
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lua_Number x = luaL_checknumber(L, 1);
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lua_Number y = luaL_checknumber(L, 2);
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lua_Number w = luaL_checknumber(L, 3);
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lua_Number h = luaL_checknumber(L, 4);
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RenRect rect = rect_to_grid(x, y, w, h);
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RenColor color = checkcolor(L, 5, 255);
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rencache_draw_rect(rect, color);
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return 0;
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}
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static int f_draw_text(lua_State *L) {
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RenFont* fonts[FONT_FALLBACK_MAX];
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font_retrieve(L, fonts, 1);
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const char *text = luaL_checkstring(L, 2);
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float x = luaL_checknumber(L, 3);
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int y = luaL_checknumber(L, 4);
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RenColor color = checkcolor(L, 5, 255);
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x = rencache_draw_text(fonts, text, x, y, color);
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lua_pushnumber(L, x);
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return 1;
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}
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static const luaL_Reg lib[] = {
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{ "show_debug", f_show_debug },
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{ "get_size", f_get_size },
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{ "begin_frame", f_begin_frame },
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{ "end_frame", f_end_frame },
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{ "set_clip_rect", f_set_clip_rect },
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{ "draw_rect", f_draw_rect },
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{ "draw_text", f_draw_text },
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{ NULL, NULL }
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};
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static const luaL_Reg fontLib[] = {
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{ "__gc", f_font_gc },
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{ "load", f_font_load },
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{ "copy", f_font_copy },
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{ "group", f_font_group },
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{ "set_tab_size", f_font_set_tab_size },
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{ "get_width", f_font_get_width },
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{ "get_height", f_font_get_height },
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{ "get_size", f_font_get_size },
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{ "set_size", f_font_set_size },
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{ "get_path", f_font_get_path },
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{ NULL, NULL }
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};
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int luaopen_renderer(lua_State *L) {
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luaL_newlib(L, lib);
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luaL_newmetatable(L, API_TYPE_FONT);
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luaL_setfuncs(L, fontLib, 0);
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lua_pushvalue(L, -1);
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lua_setfield(L, -2, "__index");
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lua_setfield(L, -2, "font");
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return 1;
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}
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