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rtext.c
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/**********************************************************************************************
*
* rtext - Basic functions to load fonts and draw text
*
* CONFIGURATION:
* #define SUPPORT_MODULE_RTEXT
* rtext module is included in the build
*
* #define SUPPORT_DEFAULT_FONT
* Load default raylib font on initialization to be used by DrawText() and MeasureText().
* If no default font loaded, DrawTextEx() and MeasureTextEx() are required.
*
* #define SUPPORT_FILEFORMAT_FNT
* #define SUPPORT_FILEFORMAT_TTF
* #define SUPPORT_FILEFORMAT_BDF
* Selected desired fileformats to be supported for loading. Some of those formats are
* supported by default, to remove support, just comment unrequired #define in this module
*
* #define SUPPORT_FONT_ATLAS_WHITE_REC
* On font atlas image generation [GenImageFontAtlas()], add a 3x3 pixels white rectangle
* at the bottom-right corner of the atlas. It can be useful to for shapes drawing, to allow
* drawing text and shapes with a single draw call [SetShapesTexture()].
*
* #define TEXTSPLIT_MAX_TEXT_BUFFER_LENGTH
* TextSplit() function static buffer max size
*
* #define MAX_TEXTSPLIT_COUNT
* TextSplit() function static substrings pointers array (pointing to static buffer)
*
* DEPENDENCIES:
* stb_truetype - Load TTF file and rasterize characters data
* stb_rect_pack - Rectangles packing algorithms, required for font atlas generation
*
*
* LICENSE: zlib/libpng
*
* Copyright (c) 2013-2024 Ramon Santamaria (@raysan5)
*
* This software is provided "as-is", without any express or implied warranty. In no event
* will the authors be held liable for any damages arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose, including commercial
* applications, and to alter it and redistribute it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not claim that you
* wrote the original software. If you use this software in a product, an acknowledgment
* in the product documentation would be appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be misrepresented
* as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*
**********************************************************************************************/
#include "raylib.h" // Declares module functions
// Check if config flags have been externally provided on compilation line
#if !defined(EXTERNAL_CONFIG_FLAGS)
#include "config.h" // Defines module configuration flags
#endif
#if defined(SUPPORT_MODULE_RTEXT)
#include "utils.h" // Required for: LoadFile*()
#include "rlgl.h" // OpenGL abstraction layer to OpenGL 1.1, 2.1, 3.3+ or ES2 -> Only DrawTextPro()
#include <stdlib.h> // Required for: malloc(), free()
#include <stdio.h> // Required for: vsprintf()
#include <string.h> // Required for: strcmp(), strstr(), strcpy(), strncpy() [Used in TextReplace()], sscanf() [Used in LoadBMFont()]
#include <stdarg.h> // Required for: va_list, va_start(), vsprintf(), va_end() [Used in TextFormat()]
#include <ctype.h> // Required for: toupper(), tolower() [Used in TextToUpper(), TextToLower()]
#if defined(SUPPORT_FILEFORMAT_TTF) || defined(SUPPORT_FILEFORMAT_BDF)
#if defined(__GNUC__) // GCC and Clang
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-function"
#endif
#define STB_RECT_PACK_IMPLEMENTATION
#include "external/stb_rect_pack.h" // Required for: ttf/bdf font rectangles packaging
#include <math.h> // Required for: ttf/bdf font rectangles packaging
#if defined(__GNUC__) // GCC and Clang
#pragma GCC diagnostic pop
#endif
#endif
#if defined(SUPPORT_FILEFORMAT_TTF)
#if defined(__GNUC__) // GCC and Clang
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-function"
#endif
#define STBTT_STATIC
#define STB_TRUETYPE_IMPLEMENTATION
#include "external/stb_truetype.h" // Required for: ttf font data reading
#if defined(__GNUC__) // GCC and Clang
#pragma GCC diagnostic pop
#endif
#endif
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
#ifndef MAX_TEXT_BUFFER_LENGTH
#define MAX_TEXT_BUFFER_LENGTH 1024 // Size of internal static buffers used on some functions:
// TextFormat(), TextSubtext(), TextToUpper(), TextToLower(), TextToPascal(), TextSplit()
#endif
#ifndef MAX_TEXT_UNICODE_CHARS
#define MAX_TEXT_UNICODE_CHARS 512 // Maximum number of unicode codepoints: GetCodepoints()
#endif
#ifndef MAX_TEXTSPLIT_COUNT
#define MAX_TEXTSPLIT_COUNT 128 // Maximum number of substrings to split: TextSplit()
#endif
//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
// ...
//----------------------------------------------------------------------------------
// Global variables
//----------------------------------------------------------------------------------
#if defined(SUPPORT_DEFAULT_FONT)
// Default font provided by raylib
// NOTE: Default font is loaded on InitWindow() and disposed on CloseWindow() [module: core]
static Font defaultFont = { 0 };
#endif
//----------------------------------------------------------------------------------
// Other Modules Functions Declaration (required by text)
//----------------------------------------------------------------------------------
//...
//----------------------------------------------------------------------------------
// Module specific Functions Declaration
//----------------------------------------------------------------------------------
#if defined(SUPPORT_FILEFORMAT_FNT)
static Font LoadBMFont(const char *fileName); // Load a BMFont file (AngelCode font file)
#endif
#if defined(SUPPORT_FILEFORMAT_BDF)
static GlyphInfo *LoadFontDataBDF(const unsigned char *fileData, int dataSize, int *codepoints, int codepointCount, int *outFontSize);
#endif
static int textLineSpacing = 15; // Text vertical line spacing in pixels
#if defined(SUPPORT_DEFAULT_FONT)
extern void LoadFontDefault(void);
extern void UnloadFontDefault(void);
#endif
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
#if defined(SUPPORT_DEFAULT_FONT)
// Load raylib default font
extern void LoadFontDefault(void)
{
#define BIT_CHECK(a,b) ((a) & (1u << (b)))
// NOTE: Using UTF-8 encoding table for Unicode U+0000..U+00FF Basic Latin + Latin-1 Supplement
// Ref: http://www.utf8-chartable.de/unicode-utf8-table.pl
defaultFont.glyphCount = 224; // Number of chars included in our default font
defaultFont.glyphPadding = 0; // Characters padding
// Default font is directly defined here (data generated from a sprite font image)
// This way, we reconstruct Font without creating large global variables
// This data is automatically allocated to Stack and automatically deallocated at the end of this function
unsigned int defaultFontData[512] = {
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00200020, 0x0001b000, 0x00000000, 0x00000000, 0x8ef92520, 0x00020a00, 0x7dbe8000, 0x1f7df45f,
0x4a2bf2a0, 0x0852091e, 0x41224000, 0x10041450, 0x2e292020, 0x08220812, 0x41222000, 0x10041450, 0x10f92020, 0x3efa084c, 0x7d22103c, 0x107df7de,
0xe8a12020, 0x08220832, 0x05220800, 0x10450410, 0xa4a3f000, 0x08520832, 0x05220400, 0x10450410, 0xe2f92020, 0x0002085e, 0x7d3e0281, 0x107df41f,
0x00200000, 0x8001b000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0xc0000fbe, 0xfbf7e00f, 0x5fbf7e7d, 0x0050bee8, 0x440808a2, 0x0a142fe8, 0x50810285, 0x0050a048,
0x49e428a2, 0x0a142828, 0x40810284, 0x0048a048, 0x10020fbe, 0x09f7ebaf, 0xd89f3e84, 0x0047a04f, 0x09e48822, 0x0a142aa1, 0x50810284, 0x0048a048,
0x04082822, 0x0a142fa0, 0x50810285, 0x0050a248, 0x00008fbe, 0xfbf42021, 0x5f817e7d, 0x07d09ce8, 0x00008000, 0x00000fe0, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x000c0180,
0xdfbf4282, 0x0bfbf7ef, 0x42850505, 0x004804bf, 0x50a142c6, 0x08401428, 0x42852505, 0x00a808a0, 0x50a146aa, 0x08401428, 0x42852505, 0x00081090,
0x5fa14a92, 0x0843f7e8, 0x7e792505, 0x00082088, 0x40a15282, 0x08420128, 0x40852489, 0x00084084, 0x40a16282, 0x0842022a, 0x40852451, 0x00088082,
0xc0bf4282, 0xf843f42f, 0x7e85fc21, 0x3e0900bf, 0x00000000, 0x00000004, 0x00000000, 0x000c0180, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x04000402, 0x41482000, 0x00000000, 0x00000800,
0x04000404, 0x4100203c, 0x00000000, 0x00000800, 0xf7df7df0, 0x514bef85, 0xbefbefbe, 0x04513bef, 0x14414500, 0x494a2885, 0xa28a28aa, 0x04510820,
0xf44145f0, 0x474a289d, 0xa28a28aa, 0x04510be0, 0x14414510, 0x494a2884, 0xa28a28aa, 0x02910a00, 0xf7df7df0, 0xd14a2f85, 0xbefbe8aa, 0x011f7be0,
0x00000000, 0x00400804, 0x20080000, 0x00000000, 0x00000000, 0x00600f84, 0x20080000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
0xac000000, 0x00000f01, 0x00000000, 0x00000000, 0x24000000, 0x00000f01, 0x00000000, 0x06000000, 0x24000000, 0x00000f01, 0x00000000, 0x09108000,
0x24fa28a2, 0x00000f01, 0x00000000, 0x013e0000, 0x2242252a, 0x00000f52, 0x00000000, 0x038a8000, 0x2422222a, 0x00000f29, 0x00000000, 0x010a8000,
0x2412252a, 0x00000f01, 0x00000000, 0x010a8000, 0x24fbe8be, 0x00000f01, 0x00000000, 0x0ebe8000, 0xac020000, 0x00000f01, 0x00000000, 0x00048000,
0x0003e000, 0x00000f00, 0x00000000, 0x00008000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000038, 0x8443b80e, 0x00203a03,
0x02bea080, 0xf0000020, 0xc452208a, 0x04202b02, 0xf8029122, 0x07f0003b, 0xe44b388e, 0x02203a02, 0x081e8a1c, 0x0411e92a, 0xf4420be0, 0x01248202,
0xe8140414, 0x05d104ba, 0xe7c3b880, 0x00893a0a, 0x283c0e1c, 0x04500902, 0xc4400080, 0x00448002, 0xe8208422, 0x04500002, 0x80400000, 0x05200002,
0x083e8e00, 0x04100002, 0x804003e0, 0x07000042, 0xf8008400, 0x07f00003, 0x80400000, 0x04000022, 0x00000000, 0x00000000, 0x80400000, 0x04000002,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00800702, 0x1848a0c2, 0x84010000, 0x02920921, 0x01042642, 0x00005121, 0x42023f7f, 0x00291002,
0xefc01422, 0x7efdfbf7, 0xefdfa109, 0x03bbbbf7, 0x28440f12, 0x42850a14, 0x20408109, 0x01111010, 0x28440408, 0x42850a14, 0x2040817f, 0x01111010,
0xefc78204, 0x7efdfbf7, 0xe7cf8109, 0x011111f3, 0x2850a932, 0x42850a14, 0x2040a109, 0x01111010, 0x2850b840, 0x42850a14, 0xefdfbf79, 0x03bbbbf7,
0x001fa020, 0x00000000, 0x00001000, 0x00000000, 0x00002070, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x08022800, 0x00012283, 0x02430802, 0x01010001, 0x8404147c, 0x20000144, 0x80048404, 0x00823f08, 0xdfbf4284, 0x7e03f7ef, 0x142850a1, 0x0000210a,
0x50a14684, 0x528a1428, 0x142850a1, 0x03efa17a, 0x50a14a9e, 0x52521428, 0x142850a1, 0x02081f4a, 0x50a15284, 0x4a221428, 0xf42850a1, 0x03efa14b,
0x50a16284, 0x4a521428, 0x042850a1, 0x0228a17a, 0xdfbf427c, 0x7e8bf7ef, 0xf7efdfbf, 0x03efbd0b, 0x00000000, 0x04000000, 0x00000000, 0x00000008,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00200508, 0x00840400, 0x11458122, 0x00014210,
0x00514294, 0x51420800, 0x20a22a94, 0x0050a508, 0x00200000, 0x00000000, 0x00050000, 0x08000000, 0xfefbefbe, 0xfbefbefb, 0xfbeb9114, 0x00fbefbe,
0x20820820, 0x8a28a20a, 0x8a289114, 0x3e8a28a2, 0xfefbefbe, 0xfbefbe0b, 0x8a289114, 0x008a28a2, 0x228a28a2, 0x08208208, 0x8a289114, 0x088a28a2,
0xfefbefbe, 0xfbefbefb, 0xfa2f9114, 0x00fbefbe, 0x00000000, 0x00000040, 0x00000000, 0x00000000, 0x00000000, 0x00000020, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00210100, 0x00000004, 0x00000000, 0x00000000, 0x14508200, 0x00001402, 0x00000000, 0x00000000,
0x00000010, 0x00000020, 0x00000000, 0x00000000, 0xa28a28be, 0x00002228, 0x00000000, 0x00000000, 0xa28a28aa, 0x000022e8, 0x00000000, 0x00000000,
0xa28a28aa, 0x000022a8, 0x00000000, 0x00000000, 0xa28a28aa, 0x000022e8, 0x00000000, 0x00000000, 0xbefbefbe, 0x00003e2f, 0x00000000, 0x00000000,
0x00000004, 0x00002028, 0x00000000, 0x00000000, 0x80000000, 0x00003e0f, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 };
int charsHeight = 10;
int charsDivisor = 1; // Every char is separated from the consecutive by a 1 pixel divisor, horizontally and vertically
int charsWidth[224] = { 3, 1, 4, 6, 5, 7, 6, 2, 3, 3, 5, 5, 2, 4, 1, 7, 5, 2, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 3, 4, 3, 6,
7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 5, 6, 5, 7, 6, 6, 6, 6, 6, 6, 7, 6, 7, 7, 6, 6, 6, 2, 7, 2, 3, 5,
2, 5, 5, 5, 5, 5, 4, 5, 5, 1, 2, 5, 2, 5, 5, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 5, 3, 1, 3, 4, 4,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 5, 5, 5, 7, 1, 5, 3, 7, 3, 5, 4, 1, 7, 4, 3, 5, 3, 3, 2, 5, 6, 1, 2, 2, 3, 5, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 7, 6, 6, 6, 6, 6, 6, 5, 6, 6, 6, 6, 6, 6, 4, 6,
5, 5, 5, 5, 5, 5, 9, 5, 5, 5, 5, 5, 2, 2, 3, 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 5 };
// Re-construct image from defaultFontData and generate OpenGL texture
//----------------------------------------------------------------------
Image imFont = {
.data = RL_CALLOC(128*128, 2), // 2 bytes per pixel (gray + alpha)
.width = 128,
.height = 128,
.mipmaps = 1,
.format = PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA
};
// Fill image.data with defaultFontData (convert from bit to pixel!)
for (int i = 0, counter = 0; i < imFont.width*imFont.height; i += 32)
{
for (int j = 31; j >= 0; j--)
{
if (BIT_CHECK(defaultFontData[counter], j))
{
// NOTE: We are unreferencing data as short, so,
// we must consider data as little-endian order (alpha + gray)
((unsigned short *)imFont.data)[i + j] = 0xffff;
}
else ((unsigned short *)imFont.data)[i + j] = 0x00ff;
}
counter++;
}
defaultFont.texture = LoadTextureFromImage(imFont);
// Reconstruct charSet using charsWidth[], charsHeight, charsDivisor, glyphCount
//------------------------------------------------------------------------------
// Allocate space for our characters info data
// NOTE: This memory must be freed at end! --> Done by CloseWindow()
defaultFont.glyphs = (GlyphInfo *)RL_MALLOC(defaultFont.glyphCount*sizeof(GlyphInfo));
defaultFont.recs = (Rectangle *)RL_MALLOC(defaultFont.glyphCount*sizeof(Rectangle));
int currentLine = 0;
int currentPosX = charsDivisor;
int testPosX = charsDivisor;
for (int i = 0; i < defaultFont.glyphCount; i++)
{
defaultFont.glyphs[i].value = 32 + i; // First char is 32
defaultFont.recs[i].x = (float)currentPosX;
defaultFont.recs[i].y = (float)(charsDivisor + currentLine*(charsHeight + charsDivisor));
defaultFont.recs[i].width = (float)charsWidth[i];
defaultFont.recs[i].height = (float)charsHeight;
testPosX += (int)(defaultFont.recs[i].width + (float)charsDivisor);
if (testPosX >= defaultFont.texture.width)
{
currentLine++;
currentPosX = 2*charsDivisor + charsWidth[i];
testPosX = currentPosX;
defaultFont.recs[i].x = (float)charsDivisor;
defaultFont.recs[i].y = (float)(charsDivisor + currentLine*(charsHeight + charsDivisor));
}
else currentPosX = testPosX;
// NOTE: On default font character offsets and xAdvance are not required
defaultFont.glyphs[i].offsetX = 0;
defaultFont.glyphs[i].offsetY = 0;
defaultFont.glyphs[i].advanceX = 0;
// Fill character image data from fontClear data
defaultFont.glyphs[i].image = ImageFromImage(imFont, defaultFont.recs[i]);
}
UnloadImage(imFont);
defaultFont.baseSize = (int)defaultFont.recs[0].height;
TRACELOG(LOG_INFO, "FONT: Default font loaded successfully (%i glyphs)", defaultFont.glyphCount);
}
// Unload raylib default font
extern void UnloadFontDefault(void)
{
for (int i = 0; i < defaultFont.glyphCount; i++) UnloadImage(defaultFont.glyphs[i].image);
UnloadTexture(defaultFont.texture);
RL_FREE(defaultFont.glyphs);
RL_FREE(defaultFont.recs);
}
#endif // SUPPORT_DEFAULT_FONT
// Get the default font, useful to be used with extended parameters
Font GetFontDefault()
{
#if defined(SUPPORT_DEFAULT_FONT)
return defaultFont;
#else
Font font = { 0 };
return font;
#endif
}
// Load Font from file into GPU memory (VRAM)
Font LoadFont(const char *fileName)
{
// Default values for ttf font generation
#ifndef FONT_TTF_DEFAULT_SIZE
#define FONT_TTF_DEFAULT_SIZE 32 // TTF font generation default char size (char-height)
#endif
#ifndef FONT_TTF_DEFAULT_NUMCHARS
#define FONT_TTF_DEFAULT_NUMCHARS 95 // TTF font generation default charset: 95 glyphs (ASCII 32..126)
#endif
#ifndef FONT_TTF_DEFAULT_FIRST_CHAR
#define FONT_TTF_DEFAULT_FIRST_CHAR 32 // TTF font generation default first char for image sprite font (32-Space)
#endif
#ifndef FONT_TTF_DEFAULT_CHARS_PADDING
#define FONT_TTF_DEFAULT_CHARS_PADDING 4 // TTF font generation default chars padding
#endif
Font font = { 0 };
#if defined(SUPPORT_FILEFORMAT_TTF)
if (IsFileExtension(fileName, ".ttf") || IsFileExtension(fileName, ".otf")) font = LoadFontEx(fileName, FONT_TTF_DEFAULT_SIZE, NULL, FONT_TTF_DEFAULT_NUMCHARS);
else
#endif
#if defined(SUPPORT_FILEFORMAT_FNT)
if (IsFileExtension(fileName, ".fnt")) font = LoadBMFont(fileName);
else
#endif
#if defined(SUPPORT_FILEFORMAT_BDF)
if (IsFileExtension(fileName, ".bdf")) font = LoadFontEx(fileName, FONT_TTF_DEFAULT_SIZE, NULL, FONT_TTF_DEFAULT_NUMCHARS);
else
#endif
{
Image image = LoadImage(fileName);
if (image.data != NULL) font = LoadFontFromImage(image, MAGENTA, FONT_TTF_DEFAULT_FIRST_CHAR);
UnloadImage(image);
}
if (font.texture.id == 0)
{
TRACELOG(LOG_WARNING, "FONT: [%s] Failed to load font texture -> Using default font", fileName);
font = GetFontDefault();
}
else
{
SetTextureFilter(font.texture, TEXTURE_FILTER_POINT); // By default, we set point filter (the best performance)
TRACELOG(LOG_INFO, "FONT: Data loaded successfully (%i pixel size | %i glyphs)", FONT_TTF_DEFAULT_SIZE, FONT_TTF_DEFAULT_NUMCHARS);
}
return font;
}
// Load Font from TTF or BDF font file with generation parameters
// NOTE: You can pass an array with desired characters, those characters should be available in the font
// if array is NULL, default char set is selected 32..126
Font LoadFontEx(const char *fileName, int fontSize, int *codepoints, int codepointCount)
{
Font font = { 0 };
// Loading file to memory
int dataSize = 0;
unsigned char *fileData = LoadFileData(fileName, &dataSize);
if (fileData != NULL)
{
// Loading font from memory data
font = LoadFontFromMemory(GetFileExtension(fileName), fileData, dataSize, fontSize, codepoints, codepointCount);
UnloadFileData(fileData);
}
else font = GetFontDefault();
return font;
}
// Load an Image font file (XNA style)
Font LoadFontFromImage(Image image, Color key, int firstChar)
{
#ifndef MAX_GLYPHS_FROM_IMAGE
#define MAX_GLYPHS_FROM_IMAGE 256 // Maximum number of glyphs supported on image scan
#endif
#define COLOR_EQUAL(col1, col2) ((col1.r == col2.r) && (col1.g == col2.g) && (col1.b == col2.b) && (col1.a == col2.a))
Font font = GetFontDefault();
int charSpacing = 0;
int lineSpacing = 0;
int x = 0;
int y = 0;
// We allocate a temporal arrays for chars data measures,
// once we get the actual number of chars, we copy data to a sized arrays
int tempCharValues[MAX_GLYPHS_FROM_IMAGE] = { 0 };
Rectangle tempCharRecs[MAX_GLYPHS_FROM_IMAGE] = { 0 };
Color *pixels = LoadImageColors(image);
// Parse image data to get charSpacing and lineSpacing
for (y = 0; y < image.height; y++)
{
for (x = 0; x < image.width; x++)
{
if (!COLOR_EQUAL(pixels[y*image.width + x], key)) break;
}
if (!COLOR_EQUAL(pixels[y*image.width + x], key)) break;
}
if ((x == 0) || (y == 0)) return font;
charSpacing = x;
lineSpacing = y;
int charHeight = 0;
int j = 0;
while (!COLOR_EQUAL(pixels[(lineSpacing + j)*image.width + charSpacing], key)) j++;
charHeight = j;
// Check array values to get characters: value, x, y, w, h
int index = 0;
int lineToRead = 0;
int xPosToRead = charSpacing;
// Parse image data to get rectangle sizes
while ((lineSpacing + lineToRead*(charHeight + lineSpacing)) < image.height)
{
while ((xPosToRead < image.width) &&
!COLOR_EQUAL((pixels[(lineSpacing + (charHeight+lineSpacing)*lineToRead)*image.width + xPosToRead]), key))
{
tempCharValues[index] = firstChar + index;
tempCharRecs[index].x = (float)xPosToRead;
tempCharRecs[index].y = (float)(lineSpacing + lineToRead*(charHeight + lineSpacing));
tempCharRecs[index].height = (float)charHeight;
int charWidth = 0;
while (!COLOR_EQUAL(pixels[(lineSpacing + (charHeight+lineSpacing)*lineToRead)*image.width + xPosToRead + charWidth], key)) charWidth++;
tempCharRecs[index].width = (float)charWidth;
index++;
xPosToRead += (charWidth + charSpacing);
}
lineToRead++;
xPosToRead = charSpacing;
}
// NOTE: We need to remove key color borders from image to avoid weird
// artifacts on texture scaling when using TEXTURE_FILTER_BILINEAR or TEXTURE_FILTER_TRILINEAR
for (int i = 0; i < image.height*image.width; i++) if (COLOR_EQUAL(pixels[i], key)) pixels[i] = BLANK;
// Create a new image with the processed color data (key color replaced by BLANK)
Image fontClear = {
.data = pixels,
.width = image.width,
.height = image.height,
.mipmaps = 1,
.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8
};
// Set font with all data parsed from image
font.texture = LoadTextureFromImage(fontClear); // Convert processed image to OpenGL texture
font.glyphCount = index;
font.glyphPadding = 0;
// We got tempCharValues and tempCharsRecs populated with chars data
// Now we move temp data to sized charValues and charRecs arrays
font.glyphs = (GlyphInfo *)RL_MALLOC(font.glyphCount*sizeof(GlyphInfo));
font.recs = (Rectangle *)RL_MALLOC(font.glyphCount*sizeof(Rectangle));
for (int i = 0; i < font.glyphCount; i++)
{
font.glyphs[i].value = tempCharValues[i];
// Get character rectangle in the font atlas texture
font.recs[i] = tempCharRecs[i];
// NOTE: On image based fonts (XNA style), character offsets and xAdvance are not required (set to 0)
font.glyphs[i].offsetX = 0;
font.glyphs[i].offsetY = 0;
font.glyphs[i].advanceX = 0;
// Fill character image data from fontClear data
font.glyphs[i].image = ImageFromImage(fontClear, tempCharRecs[i]);
}
UnloadImage(fontClear); // Unload processed image once converted to texture
font.baseSize = (int)font.recs[0].height;
return font;
}
// Load font from memory buffer, fileType refers to extension: i.e. ".ttf"
Font LoadFontFromMemory(const char *fileType, const unsigned char *fileData, int dataSize, int fontSize, int *codepoints, int codepointCount)
{
Font font = { 0 };
char fileExtLower[16] = { 0 };
strncpy(fileExtLower, TextToLower(fileType), 16 - 1);
font.baseSize = fontSize;
font.glyphCount = (codepointCount > 0)? codepointCount : 95;
font.glyphPadding = 0;
#if defined(SUPPORT_FILEFORMAT_TTF)
if (TextIsEqual(fileExtLower, ".ttf") ||
TextIsEqual(fileExtLower, ".otf"))
{
font.glyphs = LoadFontData(fileData, dataSize, font.baseSize, codepoints, font.glyphCount, FONT_DEFAULT);
}
else
#endif
#if defined(SUPPORT_FILEFORMAT_BDF)
if (TextIsEqual(fileExtLower, ".bdf"))
{
font.glyphs = LoadFontDataBDF(fileData, dataSize, codepoints, font.glyphCount, &font.baseSize);
}
else
#endif
{
font.glyphs = NULL;
}
#if defined(SUPPORT_FILEFORMAT_TTF) || defined(SUPPORT_FILEFORMAT_BDF)
if (font.glyphs != NULL)
{
font.glyphPadding = FONT_TTF_DEFAULT_CHARS_PADDING;
Image atlas = GenImageFontAtlas(font.glyphs, &font.recs, font.glyphCount, font.baseSize, font.glyphPadding, 0);
font.texture = LoadTextureFromImage(atlas);
// Update glyphs[i].image to use alpha, required to be used on ImageDrawText()
for (int i = 0; i < font.glyphCount; i++)
{
UnloadImage(font.glyphs[i].image);
font.glyphs[i].image = ImageFromImage(atlas, font.recs[i]);
}
UnloadImage(atlas);
TRACELOG(LOG_INFO, "FONT: Data loaded successfully (%i pixel size | %i glyphs)", font.baseSize, font.glyphCount);
}
else font = GetFontDefault();
#else
font = GetFontDefault();
#endif
return font;
}
// Check if a font is ready
bool IsFontReady(Font font)
{
return ((font.texture.id > 0) && // Validate OpenGL id fot font texture atlas
(font.baseSize > 0) && // Validate font size
(font.glyphCount > 0) && // Validate font contains some glyph
(font.recs != NULL) && // Validate font recs defining glyphs on texture atlas
(font.glyphs != NULL)); // Validate glyph data is loaded
// NOTE: Further validations could be done to verify if recs count and glyphs count
// match glyphCount and to verify that data contained is valid (glyphs values, metrics...)
}
// Load font data for further use
// NOTE: Requires TTF font memory data and can generate SDF data
GlyphInfo *LoadFontData(const unsigned char *fileData, int dataSize, int fontSize, int *codepoints, int codepointCount, int type)
{
// NOTE: Using some SDF generation default values,
// trades off precision with ability to handle *smaller* sizes
#ifndef FONT_SDF_CHAR_PADDING
#define FONT_SDF_CHAR_PADDING 4 // SDF font generation char padding
#endif
#ifndef FONT_SDF_ON_EDGE_VALUE
#define FONT_SDF_ON_EDGE_VALUE 128 // SDF font generation on edge value
#endif
#ifndef FONT_SDF_PIXEL_DIST_SCALE
#define FONT_SDF_PIXEL_DIST_SCALE 64.0f // SDF font generation pixel distance scale
#endif
#ifndef FONT_BITMAP_ALPHA_THRESHOLD
#define FONT_BITMAP_ALPHA_THRESHOLD 80 // Bitmap (B&W) font generation alpha threshold
#endif
GlyphInfo *chars = NULL;
#if defined(SUPPORT_FILEFORMAT_TTF)
// Load font data (including pixel data) from TTF memory file
// NOTE: Loaded information should be enough to generate font image atlas, using any packaging method
if (fileData != NULL)
{
bool genFontChars = false;
stbtt_fontinfo fontInfo = { 0 };
if (stbtt_InitFont(&fontInfo, (unsigned char *)fileData, 0)) // Initialize font for data reading
{
// Calculate font scale factor
float scaleFactor = stbtt_ScaleForPixelHeight(&fontInfo, (float)fontSize);
// Calculate font basic metrics
// NOTE: ascent is equivalent to font baseline
int ascent, descent, lineGap;
stbtt_GetFontVMetrics(&fontInfo, &ascent, &descent, &lineGap);
// In case no chars count provided, default to 95
codepointCount = (codepointCount > 0)? codepointCount : 95;
// Fill fontChars in case not provided externally
// NOTE: By default we fill glyphCount consecutively, starting at 32 (Space)
if (codepoints == NULL)
{
codepoints = (int *)RL_MALLOC(codepointCount*sizeof(int));
for (int i = 0; i < codepointCount; i++) codepoints[i] = i + 32;
genFontChars = true;
}
chars = (GlyphInfo *)RL_CALLOC(codepointCount, sizeof(GlyphInfo));
// NOTE: Using simple packaging, one char after another
for (int i = 0; i < codepointCount; i++)
{
int chw = 0, chh = 0; // Character width and height (on generation)
int ch = codepoints[i]; // Character value to get info for
chars[i].value = ch;
// Render a unicode codepoint to a bitmap
// stbtt_GetCodepointBitmap() -- allocates and returns a bitmap
// stbtt_GetCodepointBitmapBox() -- how big the bitmap must be
// stbtt_MakeCodepointBitmap() -- renders into bitmap you provide
// Check if a glyph is available in the font
// WARNING: if (index == 0), glyph not found, it could fallback to default .notdef glyph (if defined in font)
int index = stbtt_FindGlyphIndex(&fontInfo, ch);
if (index > 0)
{
switch (type)
{
case FONT_DEFAULT:
case FONT_BITMAP: chars[i].image.data = stbtt_GetCodepointBitmap(&fontInfo, scaleFactor, scaleFactor, ch, &chw, &chh, &chars[i].offsetX, &chars[i].offsetY); break;
case FONT_SDF: if (ch != 32) chars[i].image.data = stbtt_GetCodepointSDF(&fontInfo, scaleFactor, ch, FONT_SDF_CHAR_PADDING, FONT_SDF_ON_EDGE_VALUE, FONT_SDF_PIXEL_DIST_SCALE, &chw, &chh, &chars[i].offsetX, &chars[i].offsetY); break;
default: break;
}
if (chars[i].image.data != NULL) // Glyph data has been found in the font
{
stbtt_GetCodepointHMetrics(&fontInfo, ch, &chars[i].advanceX, NULL);
chars[i].advanceX = (int)((float)chars[i].advanceX*scaleFactor);
// Load characters images
chars[i].image.width = chw;
chars[i].image.height = chh;
chars[i].image.mipmaps = 1;
chars[i].image.format = PIXELFORMAT_UNCOMPRESSED_GRAYSCALE;
chars[i].offsetY += (int)((float)ascent*scaleFactor);
}
// NOTE: We create an empty image for space character,
// it could be further required for atlas packing
if (ch == 32)
{
stbtt_GetCodepointHMetrics(&fontInfo, ch, &chars[i].advanceX, NULL);
chars[i].advanceX = (int)((float)chars[i].advanceX*scaleFactor);
Image imSpace = {
.data = RL_CALLOC(chars[i].advanceX*fontSize, 2),
.width = chars[i].advanceX,
.height = fontSize,
.mipmaps = 1,
.format = PIXELFORMAT_UNCOMPRESSED_GRAYSCALE
};
chars[i].image = imSpace;
}
if (type == FONT_BITMAP)
{
// Aliased bitmap (black & white) font generation, avoiding anti-aliasing
// NOTE: For optimum results, bitmap font should be generated at base pixel size
for (int p = 0; p < chw*chh; p++)
{
if (((unsigned char *)chars[i].image.data)[p] < FONT_BITMAP_ALPHA_THRESHOLD) ((unsigned char *)chars[i].image.data)[p] = 0;
else ((unsigned char *)chars[i].image.data)[p] = 255;
}
}
}
else
{
// TODO: Use some fallback glyph for codepoints not found in the font
}
}
}
else TRACELOG(LOG_WARNING, "FONT: Failed to process TTF font data");
if (genFontChars) RL_FREE(codepoints);
}
#endif
return chars;
}
// Generate image font atlas using chars info
// NOTE: Packing method: 0-Default, 1-Skyline
#if defined(SUPPORT_FILEFORMAT_TTF) || defined(SUPPORT_FILEFORMAT_BDF)
Image GenImageFontAtlas(const GlyphInfo *glyphs, Rectangle **glyphRecs, int glyphCount, int fontSize, int padding, int packMethod)
{
Image atlas = { 0 };
if (glyphs == NULL)
{
TRACELOG(LOG_WARNING, "FONT: Provided chars info not valid, returning empty image atlas");
return atlas;
}
*glyphRecs = NULL;
// In case no chars count provided we suppose default of 95
glyphCount = (glyphCount > 0)? glyphCount : 95;
// NOTE: Rectangles memory is loaded here!
Rectangle *recs = (Rectangle *)RL_MALLOC(glyphCount*sizeof(Rectangle));
// Calculate image size based on total glyph width and glyph row count
int totalWidth = 0;
int maxGlyphWidth = 0;
for (int i = 0; i < glyphCount; i++)
{
if (glyphs[i].image.width > maxGlyphWidth) maxGlyphWidth = glyphs[i].image.width;
totalWidth += glyphs[i].image.width + 2*padding;
}
//#define SUPPORT_FONT_ATLAS_SIZE_CONSERVATIVE
#if defined(SUPPORT_FONT_ATLAS_SIZE_CONSERVATIVE)
int rowCount = 0;
int imageSize = 64; // Define minimum starting value to avoid unnecessary calculation steps for very small images
// NOTE: maxGlyphWidth is maximum possible space left at the end of row
while (totalWidth > (imageSize - maxGlyphWidth)*rowCount)
{
imageSize *= 2; // Double the size of image (to keep POT)
rowCount = imageSize/(fontSize + 2*padding); // Calculate new row count for the new image size
}
atlas.width = imageSize; // Atlas bitmap width
atlas.height = imageSize; // Atlas bitmap height
#else
int paddedFontSize = fontSize + 2*padding;
// No need for a so-conservative atlas generation
float totalArea = totalWidth*paddedFontSize*1.2f;
float imageMinSize = sqrtf(totalArea);
int imageSize = (int)powf(2, ceilf(logf(imageMinSize)/logf(2)));
if (totalArea < ((imageSize*imageSize)/2))
{
atlas.width = imageSize; // Atlas bitmap width
atlas.height = imageSize/2; // Atlas bitmap height
}
else
{
atlas.width = imageSize; // Atlas bitmap width
atlas.height = imageSize; // Atlas bitmap height
}
#endif
atlas.data = (unsigned char *)RL_CALLOC(1, atlas.width*atlas.height); // Create a bitmap to store characters (8 bpp)
atlas.format = PIXELFORMAT_UNCOMPRESSED_GRAYSCALE;
atlas.mipmaps = 1;
// DEBUG: We can see padding in the generated image setting a gray background...
//for (int i = 0; i < atlas.width*atlas.height; i++) ((unsigned char *)atlas.data)[i] = 100;
if (packMethod == 0) // Use basic packing algorithm
{
int offsetX = padding;
int offsetY = padding;
// NOTE: Using simple packaging, one char after another
for (int i = 0; i < glyphCount; i++)
{
// Check remaining space for glyph
if (offsetX >= (atlas.width - glyphs[i].image.width - 2*padding))
{
offsetX = padding;
// NOTE: Be careful on offsetY for SDF fonts, by default SDF
// use an internal padding of 4 pixels, it means char rectangle
// height is bigger than fontSize, it could be up to (fontSize + 8)
offsetY += (fontSize + 2*padding);
if (offsetY > (atlas.height - fontSize - padding))
{
for(int j = i + 1; j < glyphCount; j++)
{
TRACELOG(LOG_WARNING, "FONT: Failed to package character (%i)", j);
// Make sure remaining recs contain valid data
recs[j].x = 0;
recs[j].y = 0;
recs[j].width = 0;
recs[j].height = 0;
}
break;
}
}
// Copy pixel data from glyph image to atlas
for (int y = 0; y < glyphs[i].image.height; y++)
{
for (int x = 0; x < glyphs[i].image.width; x++)
{
((unsigned char *)atlas.data)[(offsetY + y)*atlas.width + (offsetX + x)] = ((unsigned char *)glyphs[i].image.data)[y*glyphs[i].image.width + x];
}
}
// Fill chars rectangles in atlas info
recs[i].x = (float)offsetX;
recs[i].y = (float)offsetY;
recs[i].width = (float)glyphs[i].image.width;
recs[i].height = (float)glyphs[i].image.height;
// Move atlas position X for next character drawing
offsetX += (glyphs[i].image.width + 2*padding);
}
}
else if (packMethod == 1) // Use Skyline rect packing algorithm (stb_pack_rect)
{
stbrp_context *context = (stbrp_context *)RL_MALLOC(sizeof(*context));
stbrp_node *nodes = (stbrp_node *)RL_MALLOC(glyphCount*sizeof(*nodes));
stbrp_init_target(context, atlas.width, atlas.height, nodes, glyphCount);
stbrp_rect *rects = (stbrp_rect *)RL_MALLOC(glyphCount*sizeof(stbrp_rect));
// Fill rectangles for packaging
for (int i = 0; i < glyphCount; i++)
{
rects[i].id = i;
rects[i].w = glyphs[i].image.width + 2*padding;
rects[i].h = glyphs[i].image.height + 2*padding;
}
// Package rectangles into atlas
stbrp_pack_rects(context, rects, glyphCount);
for (int i = 0; i < glyphCount; i++)
{
// It returns char rectangles in atlas
recs[i].x = rects[i].x + (float)padding;
recs[i].y = rects[i].y + (float)padding;
recs[i].width = (float)glyphs[i].image.width;
recs[i].height = (float)glyphs[i].image.height;
if (rects[i].was_packed)
{
// Copy pixel data from fc.data to atlas
for (int y = 0; y < glyphs[i].image.height; y++)
{
for (int x = 0; x < glyphs[i].image.width; x++)
{
((unsigned char *)atlas.data)[(rects[i].y + padding + y)*atlas.width + (rects[i].x + padding + x)] = ((unsigned char *)glyphs[i].image.data)[y*glyphs[i].image.width + x];
}
}
}
else TRACELOG(LOG_WARNING, "FONT: Failed to package character (%i)", i);
}
RL_FREE(rects);
RL_FREE(nodes);
RL_FREE(context);
}
#if defined(SUPPORT_FONT_ATLAS_WHITE_REC)
// Add a 3x3 white rectangle at the bottom-right corner of the generated atlas,
// useful to use as the white texture to draw shapes with raylib, using this rectangle
// shapes and text can be backed into a single draw call: SetShapesTexture()
for (int i = 0, k = atlas.width*atlas.height - 1; i < 3; i++)
{
((unsigned char *)atlas.data)[k - 0] = 255;
((unsigned char *)atlas.data)[k - 1] = 255;
((unsigned char *)atlas.data)[k - 2] = 255;
k -= atlas.width;
}
#endif
// Convert image data from GRAYSCALE to GRAY_ALPHA
unsigned char *dataGrayAlpha = (unsigned char *)RL_MALLOC(atlas.width*atlas.height*sizeof(unsigned char)*2); // Two channels
for (int i = 0, k = 0; i < atlas.width*atlas.height; i++, k += 2)
{
dataGrayAlpha[k] = 255;
dataGrayAlpha[k + 1] = ((unsigned char *)atlas.data)[i];
}
RL_FREE(atlas.data);
atlas.data = dataGrayAlpha;
atlas.format = PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA;
*glyphRecs = recs;
return atlas;
}
#endif
// Unload font glyphs info data (RAM)
void UnloadFontData(GlyphInfo *glyphs, int glyphCount)
{
if (glyphs != NULL)
{
for (int i = 0; i < glyphCount; i++) UnloadImage(glyphs[i].image);
RL_FREE(glyphs);
}
}
// Unload Font from GPU memory (VRAM)
void UnloadFont(Font font)
{
// NOTE: Make sure font is not default font (fallback)
if (font.texture.id != GetFontDefault().texture.id)
{
UnloadFontData(font.glyphs, font.glyphCount);
UnloadTexture(font.texture);
RL_FREE(font.recs);
TRACELOGD("FONT: Unloaded font data from RAM and VRAM");
}
}
// Export font as code file, returns true on success
bool ExportFontAsCode(Font font, const char *fileName)
{
bool success = false;
#ifndef TEXT_BYTES_PER_LINE
#define TEXT_BYTES_PER_LINE 20
#endif
#define MAX_FONT_DATA_SIZE 1024*1024 // 1 MB
// Get file name from path
char fileNamePascal[256] = { 0 };
strncpy(fileNamePascal, TextToPascal(GetFileNameWithoutExt(fileName)), 256 - 1);
// NOTE: Text data buffer size is estimated considering image data size in bytes
// and requiring 6 char bytes for every byte: "0x00, "
char *txtData = (char *)RL_CALLOC(MAX_FONT_DATA_SIZE, sizeof(char));
int byteCount = 0;
byteCount += sprintf(txtData + byteCount, "////////////////////////////////////////////////////////////////////////////////////////\n");
byteCount += sprintf(txtData + byteCount, "// //\n");
byteCount += sprintf(txtData + byteCount, "// FontAsCode exporter v1.0 - Font data exported as an array of bytes //\n");
byteCount += sprintf(txtData + byteCount, "// //\n");
byteCount += sprintf(txtData + byteCount, "// more info and bugs-report: github.com/raysan5/raylib //\n");
byteCount += sprintf(txtData + byteCount, "// feedback and support: ray[at]raylib.com //\n");
byteCount += sprintf(txtData + byteCount, "// //\n");
byteCount += sprintf(txtData + byteCount, "// Copyright (c) 2018-2024 Ramon Santamaria (@raysan5) //\n");
byteCount += sprintf(txtData + byteCount, "// //\n");
byteCount += sprintf(txtData + byteCount, "// ---------------------------------------------------------------------------------- //\n");
byteCount += sprintf(txtData + byteCount, "// //\n");
byteCount += sprintf(txtData + byteCount, "// TODO: Fill the information and license of the exported font here: //\n");
byteCount += sprintf(txtData + byteCount, "// //\n");
byteCount += sprintf(txtData + byteCount, "// Font name: .... //\n");
byteCount += sprintf(txtData + byteCount, "// Font creator: .... //\n");
byteCount += sprintf(txtData + byteCount, "// Font LICENSE: .... //\n");
byteCount += sprintf(txtData + byteCount, "// //\n");
byteCount += sprintf(txtData + byteCount, "////////////////////////////////////////////////////////////////////////////////////////\n\n");
// Support font export and initialization