mirror of
https://github.com/ctruLua/ctruLua.git
synced 2025-10-27 16:39:29 +00:00
324 lines
7.5 KiB
C
324 lines
7.5 KiB
C
#include "sftd.h"
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#include "texture_atlas.h"
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#include "bin_packing_2d.h"
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#include <wchar.h>
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#include <sf2d.h>
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#include <ft2build.h>
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#include FT_CACHE_H
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#include FT_FREETYPE_H
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#define ATLAS_DEFAULT_W 512
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#define ATLAS_DEFAULT_H 512
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static int sftd_initialized = 0;
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static FT_Library ftlibrary;
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static FTC_Manager ftcmanager;
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typedef enum {
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SFTD_LOAD_FROM_FILE,
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SFTD_LOAD_FROM_MEM
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} sftd_font_load_from;
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struct sftd_font {
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sftd_font_load_from from;
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union {
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char *filename;
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struct {
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const void *font_buffer;
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unsigned int buffer_size;
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};
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};
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FTC_CMapCache cmapcache;
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FTC_ImageCache imagecache;
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texture_atlas *tex_atlas;
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};
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static FT_Error ftc_face_requester(FTC_FaceID face_id, FT_Library library, FT_Pointer request_data, FT_Face *face)
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{
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sftd_font *font = (sftd_font *)face_id;
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FT_Error error = FT_Err_Cannot_Open_Resource;
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if (font->from == SFTD_LOAD_FROM_FILE) {
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error = FT_New_Face(
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library,
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font->filename,
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0,
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face);
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} else if (font->from == SFTD_LOAD_FROM_MEM) {
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error = FT_New_Memory_Face(
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library,
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font->font_buffer,
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font->buffer_size,
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0,
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face);
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}
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return error;
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}
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int sftd_init()
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{
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if (sftd_initialized) return 2;
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FT_Error error = FT_Init_FreeType(&ftlibrary);
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if (error != FT_Err_Ok) {
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return 0;
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}
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error = FTC_Manager_New(
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ftlibrary,
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0, /* use default */
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0, /* use default */
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0, /* use default */
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&ftc_face_requester, /* use our requester */
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NULL, /* user data */
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&ftcmanager);
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if (error != FT_Err_Ok) {
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FT_Done_FreeType(ftlibrary);
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return 0;
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}
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sftd_initialized = 1;
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return 1;
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}
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int sftd_fini()
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{
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if (!sftd_initialized) return 2;
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FT_Error error = FT_Done_FreeType(ftlibrary);
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if (error != FT_Err_Ok) {
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return 0;
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}
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FTC_Manager_Done(ftcmanager);
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sftd_initialized = 0;
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return 1;
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}
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sftd_font *sftd_load_font_file(const char *filename)
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{
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sftd_font *font = malloc(sizeof(*font));
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size_t len = strlen(filename);
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font->filename = malloc(len + 1);
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strcpy(font->filename, filename);
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font->filename[len] = '\0';
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FTC_CMapCache_New(ftcmanager, &font->cmapcache);
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FTC_ImageCache_New(ftcmanager, &font->imagecache);
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font->from = SFTD_LOAD_FROM_FILE;
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font->tex_atlas = texture_atlas_create(ATLAS_DEFAULT_W, ATLAS_DEFAULT_H,
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TEXFMT_RGBA8, SF2D_PLACE_RAM);
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return font;
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}
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sftd_font *sftd_load_font_mem(const void *buffer, unsigned int size)
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{
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sftd_font *font = malloc(sizeof(*font));
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font->font_buffer = buffer;
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font->buffer_size = size;
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FTC_CMapCache_New(ftcmanager, &font->cmapcache);
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FTC_ImageCache_New(ftcmanager, &font->imagecache);
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font->from = SFTD_LOAD_FROM_MEM;
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font->tex_atlas = texture_atlas_create(ATLAS_DEFAULT_W, ATLAS_DEFAULT_H,
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TEXFMT_RGBA8, SF2D_PLACE_RAM);
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return font;
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}
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void sftd_free_font(sftd_font *font)
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{
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if (font) {
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FTC_FaceID face_id = (FTC_FaceID)font;
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FTC_Manager_RemoveFaceID(ftcmanager, face_id);
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if (font->from == SFTD_LOAD_FROM_FILE) {
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free(font->filename);
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}
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texture_atlas_free(font->tex_atlas);
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free(font);
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}
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}
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static int atlas_add_glyph(texture_atlas *atlas, unsigned int glyph_index, const FT_BitmapGlyph bitmap_glyph)
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{
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const FT_Bitmap *bitmap = &bitmap_glyph->bitmap;
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unsigned int *buffer = malloc(bitmap->width * bitmap->rows * 4);
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unsigned int w = bitmap->width;
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unsigned int h = bitmap->rows;
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int j, k;
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for (j = 0; j < h; j++) {
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for (k = 0; k < w; k++) {
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if (bitmap->pixel_mode == FT_PIXEL_MODE_MONO) {
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buffer[j*w + k] =
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(bitmap->buffer[j*bitmap->pitch + k/8] & (1 << (7 - k%8)))
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? 0xFF : 0;
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} else {
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buffer[j*w + k] = 0x00FFFFFF | (bitmap->buffer[j*bitmap->pitch + k] << 24);
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}
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}
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}
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int ret = texture_atlas_insert(atlas, glyph_index, buffer,
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bitmap->width, bitmap->rows,
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bitmap_glyph->left, bitmap_glyph->top,
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bitmap_glyph->root.advance.x, bitmap_glyph->root.advance.y);
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free(buffer);
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return ret;
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}
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void sftd_draw_text(sftd_font *font, int x, int y, unsigned int color, unsigned int size, const char *text)
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{
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FTC_FaceID face_id = (FTC_FaceID)font;
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FT_Face face;
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FTC_Manager_LookupFace(ftcmanager, face_id, &face);
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FT_Int charmap_index;
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charmap_index = FT_Get_Charmap_Index(face->charmap);
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FT_Glyph glyph;
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FT_Bool use_kerning = FT_HAS_KERNING(face);
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FT_UInt glyph_index, previous = 0;
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int pen_x = x;
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int pen_y = y + size;
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FTC_ScalerRec scaler;
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scaler.face_id = face_id;
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scaler.width = size;
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scaler.height = size;
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scaler.pixel = 1;
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FT_ULong flags = FT_LOAD_RENDER | FT_LOAD_TARGET_NORMAL;
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while (*text) {
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glyph_index = FTC_CMapCache_Lookup(font->cmapcache, (FTC_FaceID)font, charmap_index, *text);
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if (use_kerning && previous && glyph_index) {
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FT_Vector delta;
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FT_Get_Kerning(face, previous, glyph_index, FT_KERNING_DEFAULT, &delta);
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pen_x += delta.x >> 6;
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}
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if (!texture_atlas_exists(font->tex_atlas, glyph_index)) {
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FTC_ImageCache_LookupScaler(font->imagecache, &scaler, flags, glyph_index, &glyph, NULL);
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if (!atlas_add_glyph(font->tex_atlas, glyph_index, (FT_BitmapGlyph)glyph)) {
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continue;
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}
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}
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bp2d_rectangle rect;
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int bitmap_left, bitmap_top;
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int advance_x, advance_y;
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texture_atlas_get(font->tex_atlas, glyph_index,
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&rect, &bitmap_left, &bitmap_top,
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&advance_x, &advance_y);
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sf2d_draw_texture_part_blend(font->tex_atlas->tex,
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pen_x + bitmap_left,
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pen_y - bitmap_top,
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rect.x, rect.y, rect.w, rect.h,
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color);
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pen_x += advance_x >> 16;
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pen_y += advance_y >> 16;
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previous = glyph_index;
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text++;
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}
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}
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void sftd_draw_textf(sftd_font *font, int x, int y, unsigned int color, unsigned int size, const char *text, ...)
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{
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char buffer[256];
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va_list args;
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va_start(args, text);
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vsnprintf(buffer, 256, text, args);
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sftd_draw_text(font, x, y, color, size, buffer);
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va_end(args);
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}
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void sftd_draw_wtext(sftd_font *font, int x, int y, unsigned int color, unsigned int size, const wchar_t *text)
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{
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FTC_FaceID face_id = (FTC_FaceID)font;
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FT_Face face;
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FTC_Manager_LookupFace(ftcmanager, face_id, &face);
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FT_Int charmap_index;
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charmap_index = FT_Get_Charmap_Index(face->charmap);
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FT_Glyph glyph;
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FT_Bool use_kerning = FT_HAS_KERNING(face);
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FT_UInt glyph_index, previous = 0;
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int pen_x = x;
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int pen_y = y + size;
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FTC_ScalerRec scaler;
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scaler.face_id = face_id;
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scaler.width = size;
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scaler.height = size;
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scaler.pixel = 1;
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FT_ULong flags = FT_LOAD_RENDER | FT_LOAD_TARGET_NORMAL;
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while (*text) {
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glyph_index = FTC_CMapCache_Lookup(font->cmapcache, (FTC_FaceID)font, charmap_index, *text);
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if (use_kerning && previous && glyph_index) {
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FT_Vector delta;
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FT_Get_Kerning(face, previous, glyph_index, FT_KERNING_DEFAULT, &delta);
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pen_x += delta.x >> 6;
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}
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if (!texture_atlas_exists(font->tex_atlas, glyph_index)) {
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FTC_ImageCache_LookupScaler(font->imagecache, &scaler, flags, glyph_index, &glyph, NULL);
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if (!atlas_add_glyph(font->tex_atlas, glyph_index, (FT_BitmapGlyph)glyph)) {
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continue;
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}
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}
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bp2d_rectangle rect;
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int bitmap_left, bitmap_top;
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int advance_x, advance_y;
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texture_atlas_get(font->tex_atlas, glyph_index,
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&rect, &bitmap_left, &bitmap_top,
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&advance_x, &advance_y);
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sf2d_draw_texture_part_blend(font->tex_atlas->tex,
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pen_x + bitmap_left,
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pen_y - bitmap_top,
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rect.x, rect.y, rect.w, rect.h,
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color);
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pen_x += advance_x >> 16;
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pen_y += advance_y >> 16;
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previous = glyph_index;
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text++;
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}
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}
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void sftd_draw_wtextf(sftd_font *font, int x, int y, unsigned int color, unsigned int size, const wchar_t *text, ...)
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{
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wchar_t buffer[256];
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va_list args;
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va_start(args, text);
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vswprintf(buffer, 256, text, args);
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sftd_draw_wtext(font, x, y, color, size, buffer);
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va_end(args);
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}
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