245 lines
8.7 KiB
C
245 lines
8.7 KiB
C
#include "font.h"
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#include "arena.h"
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#include "ttf.h"
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#include "work.h"
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#include "scratch.h"
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#include "asset_cache.h"
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#include "resource.h"
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#include "log.h"
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#include "string.h"
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#include "renderer.h"
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#define LOOKUP_TABLE_SIZE (256)
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GLOBAL u32 g_font_codes[] = {
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0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF
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};
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struct font_task_params {
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struct font_task_params *next_free;
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struct asset *asset;
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f32 point_size;
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u64 path_len;
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char path_cstr[1024];
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};
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struct font_task_params_store {
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struct font_task_params *head_free;
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struct arena arena;
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struct sys_mutex mutex;
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};
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/* ========================== *
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* Global state
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* ========================== */
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GLOBAL struct {
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struct font_task_params_store params;
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} G = ZI, DEBUG_ALIAS(G, L_font);
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/* ========================== *
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* Startup
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* ========================== */
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struct font_startup_receipt font_startup(struct work_startup_receipt *work_sr,
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struct renderer_startup_receipt *renderer_sr,
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struct asset_cache_startup_receipt *asset_cache_sr,
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struct ttf_startup_receipt *ttf_sr,
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struct resource_startup_receipt *resource_sr)
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{
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(UNUSED)work_sr;
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(UNUSED)renderer_sr;
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(UNUSED)asset_cache_sr;
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(UNUSED)ttf_sr;
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(UNUSED)resource_sr;
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G.params.arena = arena_alloc(GIGABYTE(64));
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G.params.mutex = sys_mutex_alloc();
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return (struct font_startup_receipt) { 0 };
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}
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/* ========================== *
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* Load task param store
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* ========================== */
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INTERNAL struct font_task_params *font_task_params_alloc(void)
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{
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struct font_task_params *p = NULL;
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{
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struct sys_lock lock = sys_mutex_lock_e(&G.params.mutex);
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if (G.params.head_free) {
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p = G.params.head_free;
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G.params.head_free = p->next_free;
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} else {
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p = arena_push(&G.params.arena, struct font_task_params);
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}
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sys_mutex_unlock(&lock);
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}
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return p;
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}
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INTERNAL void font_task_params_release(struct font_task_params *p)
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{
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struct sys_lock lock = sys_mutex_lock_e(&G.params.mutex);
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p->next_free = G.params.head_free;
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G.params.head_free = p;
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sys_mutex_unlock(&lock);
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}
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/* ========================== *
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* Load
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* ========================== */
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INTERNAL WORK_TASK_FUNC_DEF(font_load_asset_task, vparams)
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{
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__prof;
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struct temp_arena scratch = scratch_begin_no_conflict();
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struct font_task_params *params = (struct font_task_params *)vparams;
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struct string path = STRING(params->path_len, (u8 *)params->path_cstr);
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f32 point_size = params->point_size;
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struct asset *asset = params->asset;
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logf_info("Loading font \"%F\" (point size %F)", FMT_STR(path), FMT_FLOAT((f64)point_size));
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i64 start_ns = sys_time_ns();
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ASSERT(string_ends_with(path, LIT(".ttf")));
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if (!resource_exists(path)) {
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/* FIME: Load baked font instead of panicking */
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sys_panic(string_format(scratch.arena,
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LIT("Font \"%F\" not found"),
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FMT_STR(path)));
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}
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ASSERT(ARRAY_COUNT(g_font_codes) < LOOKUP_TABLE_SIZE);
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/* Decode */
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struct resource res = resource_open(path);
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struct ttf_decode_result result = ttf_decode(scratch.arena, resource_get_data(&res), point_size, g_font_codes, ARRAY_COUNT(g_font_codes));
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resource_close(&res);
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/* Send texture to GPU */
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struct renderer_texture texture = renderer_texture_alloc(RENDERER_TEXTURE_FORMAT_R8G8B8A8_UNORM, 0, V2I32(result.image_data.width, result.image_data.height), result.image_data.pixels);
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/* Allocate store memory */
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struct font *font = NULL;
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{
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struct asset_cache_store store = asset_cache_store_open();
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font = arena_push(store.arena, struct font);
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font->glyphs = arena_push_array_no_zero(store.arena, struct font_glyph, result.glyphs_count);
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font->lookup = arena_push_array(store.arena, u16, LOOKUP_TABLE_SIZE);
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asset_cache_store_close(&store);
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}
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/* Set font data */
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font->texture = texture;
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font->image_width = result.image_data.width;
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font->image_height = result.image_data.height;
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font->glyphs_count = result.glyphs_count;
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font->point_size = point_size;
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/* FIXME: Load baked font instead of panicking */
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if (font->glyphs_count <= 0) {
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sys_panic(string_format(scratch.arena,
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LIT("Parsed 0 glyphs from font \"%F\"!"),
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FMT_STR(path)));
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}
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/* Copy glyphs from decode result */
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MEMCPY(font->glyphs, result.glyphs, sizeof(*font->glyphs) * result.glyphs_count);
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/* Build lookup table */
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for (u64 i = 0; i < ARRAY_COUNT(g_font_codes); ++i) {
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u32 codepoint = g_font_codes[i];
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font->lookup[codepoint] = result.cache_indices[i];
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}
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font_task_params_release(params);
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f64 elapsed = SECONDS_FROM_NS(sys_time_ns() - start_ns);
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logf_info("Finished loading font \"%F\" (point size %F) in %F seconds", FMT_STR(path), FMT_FLOAT((f64)point_size), FMT_FLOAT(elapsed));
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asset_cache_mark_ready(asset, font);
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scratch_end(scratch);
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}
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/* Returns the asset from the asset cache */
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struct asset *font_load_asset(struct string path, f32 point_size, b32 help)
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{
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__prof;
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struct temp_arena scratch = scratch_begin_no_conflict();
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/* Concatenate point_size to path for key */
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struct string key = string_format(scratch.arena,
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LIT("%F%F_font"),
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FMT_STR(path),
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FMT_FLOAT_P((f64)point_size, 3));
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u64 hash = asset_cache_hash(key);
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b32 is_first_touch;
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struct asset *asset = asset_cache_touch(key, hash, &is_first_touch);
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if (is_first_touch) {
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/* Assemble task params */
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struct font_task_params *params = font_task_params_alloc();
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if (path.len > (sizeof(params->path_cstr) - 1)) {
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sys_panic(string_format(scratch.arena,
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LIT("Font path \"%F\" too long!"),
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FMT_STR(path)));
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}
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cstr_buff_from_string(STRING_FROM_ARRAY(params->path_cstr), path);
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params->path_len = path.len;
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params->asset = asset;
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params->point_size = point_size;
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/* Push task */
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asset_cache_mark_loading(asset);
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struct work_handle wh = ZI;
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if (help) {
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wh = work_push_task_and_help(&font_load_asset_task, params, WORK_PRIORITY_NORMAL);
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} else {
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wh = work_push_task(&font_load_asset_task, params, WORK_PRIORITY_NORMAL);
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}
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asset_cache_set_work(asset, &wh);
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}
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scratch_end(scratch);
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return asset;
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}
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struct font *font_load_async(struct string path, f32 point_size)
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{
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__prof;
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struct asset *asset = font_load_asset(path, point_size, false);
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struct font *f = (struct font *)asset_cache_get_store_data(asset);
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return f;
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}
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struct font *font_load(struct string path, f32 point_size)
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{
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__prof;
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struct asset *asset = font_load_asset(path, point_size, true);
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asset_cache_wait(asset);
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struct font *f = (struct font *)asset_cache_get_store_data(asset);
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return f;
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}
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/* ========================== *
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* Other
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* ========================== */
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struct font_glyph *font_get_glyph(struct font *font, u32 codepoint)
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{
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if (codepoint < LOOKUP_TABLE_SIZE) {
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u16 index = font->lookup[codepoint];
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if (index < font->glyphs_count) {
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return &font->glyphs[index];
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}
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}
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if (codepoint == '?') {
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return &font->glyphs[font->lookup[0]];
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} else {
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return &font->glyphs[font->lookup['?']];
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}
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}
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