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Diffstat (limited to 'src/konfont.h')
| -rw-r--r-- | src/konfont.h | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/src/konfont.h b/src/konfont.h deleted file mode 100644 index 822e1f3..0000000 --- a/src/konfont.h +++ /dev/null @@ -1,197 +0,0 @@ -/* SPDX-License-Identifier: MIT */ -/* - * konfont.h - * - * Copyright (c) 2026 KonAki - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -#ifndef KONFONT_H -#define KONFONT_H - -#include <stdint.h> -#include <stdbool.h> -#include <stddef.h> -#include <stdlib.h> - -#include "konsofren.h" - -#define KON_FONT_FIRST_CHAR 32 -#define KON_FONT_NUM_CHARS 95 - -typedef struct kon_font kon_font_t; - -/*** font declarations ***/ - -kon_font_t *kon_loadFont(const uint8_t *ttf_data, size_t size, float pixelHeight); -void kon_freeFont(kon_font_t *font); - -kon_image *kon_fontGetAtlas(kon_font_t *font); - -/*** text draw declarations ***/ - -void kon_drawText(kon_framebuffer_t *fb, kon_font_t *font, int x, int y, const char *text, uint32_t color); -void kon_measureText(kon_font_t *font, const char *text, int *outWidth, int *outHeight); - -/*** implementatoin ***/ - -#ifdef KONFONT_IMPLEMENTATION - -#include "stb_truetype.h" - -struct kon_font { - stbtt_bakedchar chardata[KON_FONT_NUM_CHARS]; - uint8_t *atlasPixels; - int atlasSize; - float pixelHeight; -}; - -/*** private helpers ***/ - -static bool kon_fontBakeAtlas(kon_font_t *font, const uint8_t *ttf_data, float pixelHeight) { - int sizes[] = {256, 512, 1024, 2048}; - - for (int i = 0; i < 4; i++) { - int atlasSize = sizes[i]; - - uint8_t *bitmap = malloc((size_t)atlasSize * (size_t)atlasSize); - if (!bitmap) return false; - - int result = stbtt_BakeFontBitmap(ttf_data, 0, pixelHeight, bitmap, atlasSize, atlasSize, KON_FONT_FIRST_CHAR, KON_FONT_NUM_CHARS, font->chardata); - - if (result > 0) { - font->atlasPixels = bitmap; - font->atlasSize = atlasSize; - return true; - } - - free(bitmap); - } - - return false; -} - -/*** font implementation ***/ - -kon_font_t *kon_loadFont(const uint8_t *ttf_data, size_t size, float pixelHeight) { - (void)size; - - if (!ttf_data || pixelHeight <= 0.0f) return NULL; - - kon_font_t *font = malloc(sizeof(kon_font_t)); - if (!font) return NULL; - - font->atlasPixels = NULL; - font->pixelHeight = pixelHeight; - - if (!kon_fontBakeAtlas(font, ttf_data, pixelHeight)) { - free(font); - return NULL; - } - - return font; -} - -void kon_freeFont(kon_font_t *font) { - if (!font) return; - - free(font->atlasPixels); - free(font); -} - -kon_image *kon_fontGetAtlas(kon_font_t *font) { - if (!font) return NULL; - - int n = font->atlasSize * font->atlasSize; - uint8_t *rgba = malloc((size_t)n * 4); - if (!rgba) return NULL; - - for (int i = 0; i < n; i++) { - uint8_t a = font->atlasPixels[i]; - rgba[i * 4 + 0] = 255; - rgba[i * 4 + 1] = 255; - rgba[i * 4 + 2] = 255; - rgba[i * 4 + 3] = a; - } - - kon_image *img = kon_loadImage(rgba, font->atlasSize, font->atlasSize, konFormatRGBA8); - free(rgba); - return img; -} - -/*** text draw implementation ***/ - -void kon_drawText(kon_framebuffer_t *fb, kon_font_t *font, int x, int y, const char *text, uint32_t color) { - if (!fb || !font || !text) return; - - uint32_t baseColor = color & 0x00FFFFFF; - - float cursorX = (float)x; - float cursorY = (float)y; - - for (const char *p = text; *p; p++) { - unsigned char c = (unsigned char)*p; - - if (c < KON_FONT_FIRST_CHAR || c >= KON_FONT_FIRST_CHAR + KON_FONT_NUM_CHARS) continue; - - stbtt_aligned_quad q; - stbtt_GetBakedQuad(font->chardata, font->atlasSize, font->atlasSize, c - KON_FONT_FIRST_CHAR, &cursorX, &cursorY, &q, 0); - - int src_x0 = (int)(q.s0 * font->atlasSize); - int src_y0 = (int)(q.t0 * font->atlasSize); - int glyphW = (int)(q.x1 - q.x0); - int glyphH = (int)(q.y1 - q.y0); - - for (int gy = 0; gy < glyphH; gy++) { - for (int gx = 0; gx < glyphW; gx++) { - uint8_t alpha = font->atlasPixels[(src_y0 + gy) * font->atlasSize + (src_x0 + gx)]; - if (alpha == 0) continue; - - kon_putPixel(fb, (int)q.x0 + gx, (int)q.y0 + gy, ((uint32_t)alpha << 24) | baseColor); - } - } - } -} - -void kon_measureText(kon_font_t *font, const char *text, int *outWidth, int *outHeight) { - if (!font || !text) return; - - float cursorX = 0.0f; - float cursorY = 0.0f; - float maxX = 0.0f; - - for (const char *p = text; *p; p++) { - unsigned char c = (unsigned char)*p; - - if (c < KON_FONT_FIRST_CHAR || c >= KON_FONT_FIRST_CHAR + KON_FONT_NUM_CHARS) continue; - - stbtt_aligned_quad q; - stbtt_GetBakedQuad(font->chardata, font->atlasSize, font->atlasSize, c - KON_FONT_FIRST_CHAR, &cursorX, &cursorY, &q, 0); - - if (cursorX > maxX) maxX = cursorX; - } - - if (outWidth) *outWidth = (int)maxX; - if (outHeight) *outHeight = (int)font->pixelHeight; -} - -#endif /* KONFONT_IMPLEMENTATION */ - -#endif /* KONFONT_H */ |