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raylib/src/rtext.c
Rob Loach d8af76f67c Fix to use TRACELOG() instead of TraceLog() for internal modules (#2881) 
There were a few raylib modules that continued to use TraceLog() instead of the TRACELOG() macro. This change ensures that all the internal raylib modules use the TRACELOG() pattern consistently.
2023-01-22 11:10:38 +01:00

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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_FILEFORMAT_FNT
* #define SUPPORT_FILEFORMAT_TTF
* 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_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 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) 2013-2023 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> // Requried for: toupper(), tolower() [Used in TextToUpper(), TextToLower()]
#if defined(SUPPORT_FILEFORMAT_TTF)
#define STB_RECT_PACK_IMPLEMENTATION
#include "external/stb_rect_pack.h" // Required for: ttf font rectangles packaging
#define STBTT_STATIC
#define STB_TRUETYPE_IMPLEMENTATION
#include "external/stb_truetype.h" // Required for: ttf font data reading
#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_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
{
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 (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 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 *fontChars, int glyphCount)
{
Font font = { 0 };
// Loading file to memory
unsigned int fileSize = 0;
unsigned char *fileData = LoadFileData(fileName, &fileSize);
if (fileData != NULL)
{
// Loading font from memory data
font = LoadFontFromMemory(GetFileExtension(fileName), fileData, fileSize, fontSize, fontChars, glyphCount);
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 *fontChars, int glyphCount)
{
Font font = { 0 };
char fileExtLower[16] = { 0 };
strcpy(fileExtLower, TextToLower(fileType));
#if defined(SUPPORT_FILEFORMAT_TTF)
if (TextIsEqual(fileExtLower, ".ttf") ||
TextIsEqual(fileExtLower, ".otf"))
{
font.baseSize = fontSize;
font.glyphCount = (glyphCount > 0)? glyphCount : 95;
font.glyphPadding = 0;
font.glyphs = LoadFontData(fileData, dataSize, font.baseSize, fontChars, font.glyphCount, FONT_DEFAULT);
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;
}
// 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 *fontChars, int glyphCount, 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
glyphCount = (glyphCount > 0)? glyphCount : 95;
// Fill fontChars in case not provided externally
// NOTE: By default we fill glyphCount consecutevely, starting at 32 (Space)
if (fontChars == NULL)
{
fontChars = (int *)RL_MALLOC(glyphCount*sizeof(int));
for (int i = 0; i < glyphCount; i++) fontChars[i] = i + 32;
genFontChars = true;
}
chars = (GlyphInfo *)RL_MALLOC(glyphCount*sizeof(GlyphInfo));
// NOTE: Using simple packaging, one char after another
for (int i = 0; i < glyphCount; i++)
{
int chw = 0, chh = 0; // Character width and height (on generation)
int ch = fontChars[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
if (type != FONT_SDF) chars[i].image.data = stbtt_GetCodepointBitmap(&fontInfo, scaleFactor, scaleFactor, ch, &chw, &chh, &chars[i].offsetX, &chars[i].offsetY);
else 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);
else chars[i].image.data = NULL;
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)
{
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;
}
}
// Get bounding box for character (may be offset to account for chars that dip above or below the line)
/*
int chX1, chY1, chX2, chY2;
stbtt_GetCodepointBitmapBox(&fontInfo, ch, scaleFactor, scaleFactor, &chX1, &chY1, &chX2, &chY2);
TRACELOGD("FONT: Character box measures: %i, %i, %i, %i", chX1, chY1, chX2 - chX1, chY2 - chY1);
TRACELOGD("FONT: Character offsetY: %i", (int)((float)ascent*scaleFactor) + chY1);
*/
}
}
else TRACELOG(LOG_WARNING, "FONT: Failed to process TTF font data");
if (genFontChars) RL_FREE(fontChars);
}
#endif
return chars;
}
// Generate image font atlas using chars info
// NOTE: Packing method: 0-Default, 1-Skyline
#if defined(SUPPORT_FILEFORMAT_TTF)
Image GenImageFontAtlas(const GlyphInfo *chars, Rectangle **charRecs, int glyphCount, int fontSize, int padding, int packMethod)
{
Image atlas = { 0 };
if (chars == NULL)
{
TRACELOG(LOG_WARNING, "FONT: Provided chars info not valid, returning empty image atlas");
return atlas;
}
*charRecs = 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 required pixel area
// NOTE 1: Image is forced to be squared and POT... very conservative!
// NOTE 2: SDF font characters already contain an internal padding,
// so image size would result bigger than default font type
float requiredArea = 0;
for (int i = 0; i < glyphCount; i++) requiredArea += ((chars[i].image.width + 2*padding)*(fontSize + 2*padding));
float guessSize = sqrtf(requiredArea)*1.4f;
int imageSize = (int)powf(2, ceilf(logf((float)guessSize)/logf(2))); // Calculate next POT
atlas.width = imageSize; // Atlas bitmap width
atlas.height = imageSize; // Atlas bitmap height
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++)
{
// Copy pixel data from fc.data to atlas
for (int y = 0; y < chars[i].image.height; y++)
{
for (int x = 0; x < chars[i].image.width; x++)
{
((unsigned char *)atlas.data)[(offsetY + y)*atlas.width + (offsetX + x)] = ((unsigned char *)chars[i].image.data)[y*chars[i].image.width + x];
}
}
// Fill chars rectangles in atlas info
recs[i].x = (float)offsetX;
recs[i].y = (float)offsetY;
recs[i].width = (float)chars[i].image.width;
recs[i].height = (float)chars[i].image.height;
// Move atlas position X for next character drawing
offsetX += (chars[i].image.width + 2*padding);
if (offsetX >= (atlas.width - chars[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;
}
}
}
}
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 = chars[i].image.width + 2*padding;
rects[i].h = chars[i].image.height + 2*padding;
}
// Package rectangles into atlas
stbrp_pack_rects(context, rects, glyphCount);
for (int i = 0; i < glyphCount; i++)
{
// It return char rectangles in atlas
recs[i].x = rects[i].x + (float)padding;
recs[i].y = rects[i].y + (float)padding;
recs[i].width = (float)chars[i].image.width;
recs[i].height = (float)chars[i].image.height;
if (rects[i].was_packed)
{
// Copy pixel data from fc.data to atlas
for (int y = 0; y < chars[i].image.height; y++)
{
for (int x = 0; x < chars[i].image.width; x++)
{
((unsigned char *)atlas.data)[(rects[i].y + padding + y)*atlas.width + (rects[i].x + padding + x)] = ((unsigned char *)chars[i].image.data)[y*chars[i].image.width + x];
}
}
}
else TRACELOG(LOG_WARNING, "FONT: Failed to package character (%i)", i);
}
RL_FREE(rects);
RL_FREE(nodes);
RL_FREE(context);
}
// 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;
*charRecs = 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 };
strcpy(fileNamePascal, TextToPascal(GetFileNameWithoutExt(fileName)));
// 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) 2018-2023 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
// NOTE: This mechanism is highly coupled to raylib
Image image = LoadImageFromTexture(font.texture);
if (image.format != PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA) TRACELOG(LOG_WARNING, "Font export as code: Font image format is not GRAY+ALPHA!");
int imageDataSize = GetPixelDataSize(image.width, image.height, image.format);
// Image data is usually GRAYSCALE + ALPHA and can be reduced to GRAYSCALE
//ImageFormat(&image, PIXELFORMAT_UNCOMPRESSED_GRAYSCALE);
#define SUPPORT_COMPRESSED_FONT_ATLAS
#if defined(SUPPORT_COMPRESSED_FONT_ATLAS)
// WARNING: Data is compressed using raylib CompressData() DEFLATE,
// it requires to be decompressed with raylib DecompressData(), that requires
// compiling raylib with SUPPORT_COMPRESSION_API config flag enabled
// Compress font image data
int compDataSize = 0;
unsigned char *compData = CompressData((const unsigned char *)image.data, imageDataSize, &compDataSize);
// Save font image data (compressed)
byteCount += sprintf(txtData + byteCount, "#define COMPRESSED_DATA_SIZE_FONT_%s %i\n\n", TextToUpper(fileNamePascal), compDataSize);
byteCount += sprintf(txtData + byteCount, "// Font image pixels data compressed (DEFLATE)\n");
byteCount += sprintf(txtData + byteCount, "// NOTE: Original pixel data simplified to GRAYSCALE\n");
byteCount += sprintf(txtData + byteCount, "static unsigned char fontData_%s[COMPRESSED_DATA_SIZE_FONT_%s] = { ", fileNamePascal, TextToUpper(fileNamePascal));
for (int i = 0; i < compDataSize - 1; i++) byteCount += sprintf(txtData + byteCount, ((i%TEXT_BYTES_PER_LINE == 0)? "0x%02x,\n " : "0x%02x, "), compData[i]);
byteCount += sprintf(txtData + byteCount, "0x%02x };\n\n", compData[compDataSize - 1]);
MemFree(compData);
#else
// Save font image data (uncompressed)
byteCount += sprintf(txtData + byteCount, "// Font image pixels data\n");
byteCount += sprintf(txtData + byteCount, "// NOTE: 2 bytes per pixel, GRAY + ALPHA channels\n");
byteCount += sprintf(txtData + byteCount, "static unsigned char fontImageData_%s[%i] = { ", fileNamePascal, imageDataSize);
for (int i = 0; i < imageDataSize - 1; i++) byteCount += sprintf(txtData + byteCount, ((i%TEXT_BYTES_PER_LINE == 0)? "0x%02x,\n " : "0x%02x, "), ((unsigned char *)imFont.data)[i]);
byteCount += sprintf(txtData + byteCount, "0x%02x };\n\n", ((unsigned char *)imFont.data)[imageDataSize - 1]);
#endif
// Save font recs data
byteCount += sprintf(txtData + byteCount, "// Font characters rectangles data\n");
byteCount += sprintf(txtData + byteCount, "static const Rectangle fontRecs_%s[%i] = {\n", fileNamePascal, font.glyphCount);
for (int i = 0; i < font.glyphCount; i++)
{
byteCount += sprintf(txtData + byteCount, " { %1.0f, %1.0f, %1.0f , %1.0f },\n", font.recs[i].x, font.recs[i].y, font.recs[i].width, font.recs[i].height);
}
byteCount += sprintf(txtData + byteCount, "};\n\n");
// Save font glyphs data
// NOTE: Glyphs image data not saved (grayscale pixels),
// it could be generated from image and recs
byteCount += sprintf(txtData + byteCount, "// Font glyphs info data\n");
byteCount += sprintf(txtData + byteCount, "// NOTE: No glyphs.image data provided\n");
byteCount += sprintf(txtData + byteCount, "static const GlyphInfo fontGlyphs_%s[%i] = {\n", fileNamePascal, font.glyphCount);
for (int i = 0; i < font.glyphCount; i++)
{
byteCount += sprintf(txtData + byteCount, " { %i, %i, %i, %i, { 0 }},\n", font.glyphs[i].value, font.glyphs[i].offsetX, font.glyphs[i].offsetY, font.glyphs[i].advanceX);
}
byteCount += sprintf(txtData + byteCount, "};\n\n");
// Custom font loading function
byteCount += sprintf(txtData + byteCount, "// Font loading function: %s\n", fileNamePascal);
byteCount += sprintf(txtData + byteCount, "static Font LoadFont_%s(void)\n{\n", fileNamePascal);
byteCount += sprintf(txtData + byteCount, " Font font = { 0 };\n\n");
byteCount += sprintf(txtData + byteCount, " font.baseSize = %i;\n", font.baseSize);
byteCount += sprintf(txtData + byteCount, " font.glyphCount = %i;\n", font.glyphCount);
byteCount += sprintf(txtData + byteCount, " font.glyphPadding = %i;\n\n", font.glyphPadding);
byteCount += sprintf(txtData + byteCount, " // Custom font loading\n");
#if defined(SUPPORT_COMPRESSED_FONT_ATLAS)
byteCount += sprintf(txtData + byteCount, " // NOTE: Compressed font image data (DEFLATE), it requires DecompressData() function\n");
byteCount += sprintf(txtData + byteCount, " int fontDataSize_%s = 0;\n", fileNamePascal);
byteCount += sprintf(txtData + byteCount, " unsigned char *data = DecompressData(fontData_%s, COMPRESSED_DATA_SIZE_FONT_%s, &fontDataSize_%s);\n", fileNamePascal, TextToUpper(fileNamePascal), fileNamePascal);
byteCount += sprintf(txtData + byteCount, " Image imFont = { data, %i, %i, 1, %i };\n\n", image.width, image.height, image.format);
#else
byteCount += sprintf(txtData + byteCount, " Image imFont = { fontImageData_%s, %i, %i, 1, %i };\n\n", styleName, image.width, image.height, image.format);
#endif
byteCount += sprintf(txtData + byteCount, " // Load texture from image\n");
byteCount += sprintf(txtData + byteCount, " font.texture = LoadTextureFromImage(imFont);\n");
#if defined(SUPPORT_COMPRESSED_FONT_ATLAS)
byteCount += sprintf(txtData + byteCount, " UnloadImage(imFont); // Uncompressed data can be unloaded from memory\n\n");
#endif
// We have two possible mechanisms to assign font.recs and font.glyphs data,
// that data is already available as global arrays, we two options to assign that data:
// - 1. Data copy. This option consumes more memory and Font MUST be unloaded by user, requiring additional code.
// - 2. Data assignment. This option consumes less memory and Font MUST NOT be unloaded by user because data is on protected DATA segment
//#define SUPPORT_FONT_DATA_COPY
#if defined(SUPPORT_FONT_DATA_COPY)
byteCount += sprintf(txtData + byteCount, " // Copy glyph recs data from global fontRecs\n");
byteCount += sprintf(txtData + byteCount, " // NOTE: Required to avoid issues if trying to free font\n");
byteCount += sprintf(txtData + byteCount, " font.recs = (Rectangle *)malloc(font.glyphCount*sizeof(Rectangle));\n");
byteCount += sprintf(txtData + byteCount, " memcpy(font.recs, fontRecs_%s, font.glyphCount*sizeof(Rectangle));\n\n", fileNamePascal);
byteCount += sprintf(txtData + byteCount, " // Copy font glyph info data from global fontChars\n");
byteCount += sprintf(txtData + byteCount, " // NOTE: Required to avoid issues if trying to free font\n");
byteCount += sprintf(txtData + byteCount, " font.glyphs = (GlyphInfo *)malloc(font.glyphCount*sizeof(GlyphInfo));\n");
byteCount += sprintf(txtData + byteCount, " memcpy(font.glyphs, fontGlyphs_%s, font.glyphCount*sizeof(GlyphInfo));\n\n", fileNamePascal);
#else
byteCount += sprintf(txtData + byteCount, " // Assign glyph recs and info data directly\n");
byteCount += sprintf(txtData + byteCount, " // WARNING: This font data must not be unloaded\n");
byteCount += sprintf(txtData + byteCount, " font.recs = fontRecs_%s;\n", fileNamePascal);
byteCount += sprintf(txtData + byteCount, " font.glyphs = fontGlyphs_%s;\n\n", fileNamePascal);
#endif
byteCount += sprintf(txtData + byteCount, " return font;\n");
byteCount += sprintf(txtData + byteCount, "}\n");
UnloadImage(image);
// NOTE: Text data size exported is determined by '\0' (NULL) character
success = SaveFileText(fileName, txtData);
RL_FREE(txtData);
if (success != 0) TRACELOG(LOG_INFO, "FILEIO: [%s] Font as code exported successfully", fileName);
else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to export font as code", fileName);
return success;
}
// Draw current FPS
// NOTE: Uses default font
void DrawFPS(int posX, int posY)
{
Color color = LIME; // Good FPS
int fps = GetFPS();
if ((fps < 30) && (fps >= 15)) color = ORANGE; // Warning FPS
else if (fps < 15) color = RED; // Low FPS
DrawText(TextFormat("%2i FPS", GetFPS()), posX, posY, 20, color);
}
// Draw text (using default font)
// NOTE: fontSize work like in any drawing program but if fontSize is lower than font-base-size, then font-base-size is used
// NOTE: chars spacing is proportional to fontSize
void DrawText(const char *text, int posX, int posY, int fontSize, Color color)
{
// Check if default font has been loaded
if (GetFontDefault().texture.id != 0)
{
Vector2 position = { (float)posX, (float)posY };
int defaultFontSize = 10; // Default Font chars height in pixel
if (fontSize < defaultFontSize) fontSize = defaultFontSize;
int spacing = fontSize/defaultFontSize;
DrawTextEx(GetFontDefault(), text, position, (float)fontSize, (float)spacing, color);
}
}
// Draw text using Font
// NOTE: chars spacing is NOT proportional to fontSize
void DrawTextEx(Font font, const char *text, Vector2 position, float fontSize, float spacing, Color tint)
{
if (font.texture.id == 0) font = GetFontDefault(); // Security check in case of not valid font
int size = TextLength(text); // Total size in bytes of the text, scanned by codepoints in loop
int textOffsetY = 0; // Offset between lines (on line break '\n')
float textOffsetX = 0.0f; // Offset X to next character to draw
float scaleFactor = fontSize/font.baseSize; // Character quad scaling factor
for (int i = 0; i < size;)
{
// Get next codepoint from byte string and glyph index in font
int codepointByteCount = 0;
int codepoint = GetCodepointNext(&text[i], &codepointByteCount);
int index = GetGlyphIndex(font, codepoint);
// NOTE: Normally we exit the decoding sequence as soon as a bad byte is found (and return 0x3f)
// but we need to draw all of the bad bytes using the '?' symbol moving one byte
if (codepoint == 0x3f) codepointByteCount = 1;
if (codepoint == '\n')
{
// NOTE: Fixed line spacing of 1.5 line-height
// TODO: Support custom line spacing defined by user
textOffsetY += (int)((font.baseSize + font.baseSize/2.0f)*scaleFactor);
textOffsetX = 0.0f;
}
else
{
if ((codepoint != ' ') && (codepoint != '\t'))
{
DrawTextCodepoint(font, codepoint, (Vector2){ position.x + textOffsetX, position.y + textOffsetY }, fontSize, tint);
}
if (font.glyphs[index].advanceX == 0) textOffsetX += ((float)font.recs[index].width*scaleFactor + spacing);
else textOffsetX += ((float)font.glyphs[index].advanceX*scaleFactor + spacing);
}
i += codepointByteCount; // Move text bytes counter to next codepoint
}
}
// Draw text using Font and pro parameters (rotation)
void DrawTextPro(Font font, const char *text, Vector2 position, Vector2 origin, float rotation, float fontSize, float spacing, Color tint)
{
rlPushMatrix();
rlTranslatef(position.x, position.y, 0.0f);
rlRotatef(rotation, 0.0f, 0.0f, 1.0f);
rlTranslatef(-origin.x, -origin.y, 0.0f);
DrawTextEx(font, text, (Vector2){ 0.0f, 0.0f }, fontSize, spacing, tint);
rlPopMatrix();
}
// Draw one character (codepoint)
void DrawTextCodepoint(Font font, int codepoint, Vector2 position, float fontSize, Color tint)
{
// Character index position in sprite font
// NOTE: In case a codepoint is not available in the font, index returned points to '?'
int index = GetGlyphIndex(font, codepoint);
float scaleFactor = fontSize/font.baseSize; // Character quad scaling factor
// Character destination rectangle on screen
// NOTE: We consider glyphPadding on drawing
Rectangle dstRec = { position.x + font.glyphs[index].offsetX*scaleFactor - (float)font.glyphPadding*scaleFactor,
position.y + font.glyphs[index].offsetY*scaleFactor - (float)font.glyphPadding*scaleFactor,
(font.recs[index].width + 2.0f*font.glyphPadding)*scaleFactor,
(font.recs[index].height + 2.0f*font.glyphPadding)*scaleFactor };
// Character source rectangle from font texture atlas
// NOTE: We consider chars padding when drawing, it could be required for outline/glow shader effects
Rectangle srcRec = { font.recs[index].x - (float)font.glyphPadding, font.recs[index].y - (float)font.glyphPadding,
font.recs[index].width + 2.0f*font.glyphPadding, font.recs[index].height + 2.0f*font.glyphPadding };
// Draw the character texture on the screen
DrawTexturePro(font.texture, srcRec, dstRec, (Vector2){ 0, 0 }, 0.0f, tint);
}
// Draw multiple character (codepoints)
void DrawTextCodepoints(Font font, const int *codepoints, int count, Vector2 position, float fontSize, float spacing, Color tint)
{
int textOffsetY = 0; // Offset between lines (on line break '\n')
float textOffsetX = 0.0f; // Offset X to next character to draw
float scaleFactor = fontSize/font.baseSize; // Character quad scaling factor
for (int i = 0; i < count; i++)
{
int index = GetGlyphIndex(font, codepoints[i]);
if (codepoints[i] == '\n')
{
// NOTE: Fixed line spacing of 1.5 line-height
// TODO: Support custom line spacing defined by user
textOffsetY += (int)((font.baseSize + font.baseSize/2.0f)*scaleFactor);
textOffsetX = 0.0f;
}
else
{
if ((codepoints[i] != ' ') && (codepoints[i] != '\t'))
{
DrawTextCodepoint(font, codepoints[i], (Vector2){ position.x + textOffsetX, position.y + textOffsetY }, fontSize, tint);
}
if (font.glyphs[index].advanceX == 0) textOffsetX += ((float)font.recs[index].width*scaleFactor + spacing);
else textOffsetX += ((float)font.glyphs[index].advanceX*scaleFactor + spacing);
}
}
}
// Measure string width for default font
int MeasureText(const char *text, int fontSize)
{
Vector2 textSize = { 0.0f, 0.0f };
// Check if default font has been loaded
if (GetFontDefault().texture.id != 0)
{
int defaultFontSize = 10; // Default Font chars height in pixel
if (fontSize < defaultFontSize) fontSize = defaultFontSize;
int spacing = fontSize/defaultFontSize;
textSize = MeasureTextEx(GetFontDefault(), text, (float)fontSize, (float)spacing);
}
return (int)textSize.x;
}
// Measure string size for Font
Vector2 MeasureTextEx(Font font, const char *text, float fontSize, float spacing)
{
Vector2 textSize = { 0 };
if ((font.texture.id == 0) || (text == NULL)) return textSize;
int size = TextLength(text); // Get size in bytes of text
int tempByteCounter = 0; // Used to count longer text line num chars
int byteCounter = 0;
float textWidth = 0.0f;
float tempTextWidth = 0.0f; // Used to count longer text line width
float textHeight = (float)font.baseSize;
float scaleFactor = fontSize/(float)font.baseSize;
int letter = 0; // Current character
int index = 0; // Index position in sprite font
for (int i = 0; i < size; i++)
{
byteCounter++;
int next = 0;
letter = GetCodepointNext(&text[i], &next);
index = GetGlyphIndex(font, letter);
// NOTE: normally we exit the decoding sequence as soon as a bad byte is found (and return 0x3f)
// but we need to draw all of the bad bytes using the '?' symbol so to not skip any we set next = 1
if (letter == 0x3f) next = 1;
i += next - 1;
if (letter != '\n')
{
if (font.glyphs[index].advanceX != 0) textWidth += font.glyphs[index].advanceX;
else textWidth += (font.recs[index].width + font.glyphs[index].offsetX);
}
else
{
if (tempTextWidth < textWidth) tempTextWidth = textWidth;
byteCounter = 0;
textWidth = 0;
textHeight += ((float)font.baseSize*1.5f); // NOTE: Fixed line spacing of 1.5 lines
}
if (tempByteCounter < byteCounter) tempByteCounter = byteCounter;
}
if (tempTextWidth < textWidth) tempTextWidth = textWidth;
textSize.x = tempTextWidth*scaleFactor + (float)((tempByteCounter - 1)*spacing); // Adds chars spacing to measure
textSize.y = textHeight*scaleFactor;
return textSize;
}
// Get index position for a unicode character on font
// NOTE: If codepoint is not found in the font it fallbacks to '?'
int GetGlyphIndex(Font font, int codepoint)
{
#ifndef GLYPH_NOTFOUND_CHAR_FALLBACK
#define GLYPH_NOTFOUND_CHAR_FALLBACK 63 // Character used if requested codepoint is not found: '?'
#endif
// Support charsets with any characters order
#define SUPPORT_UNORDERED_CHARSET
#if defined(SUPPORT_UNORDERED_CHARSET)
int index = GLYPH_NOTFOUND_CHAR_FALLBACK;
for (int i = 0; i < font.glyphCount; i++)
{
if (font.glyphs[i].value == codepoint)
{
index = i;
break;
}
}
return index;
#else
return (codepoint - 32);
#endif
}
// Get glyph font info data for a codepoint (unicode character)
// NOTE: If codepoint is not found in the font it fallbacks to '?'
GlyphInfo GetGlyphInfo(Font font, int codepoint)
{
GlyphInfo info = { 0 };
info = font.glyphs[GetGlyphIndex(font, codepoint)];
return info;
}
// Get glyph rectangle in font atlas for a codepoint (unicode character)
// NOTE: If codepoint is not found in the font it fallbacks to '?'
Rectangle GetGlyphAtlasRec(Font font, int codepoint)
{
Rectangle rec = { 0 };
rec = font.recs[GetGlyphIndex(font, codepoint)];
return rec;
}
//----------------------------------------------------------------------------------
// Text strings management functions
//----------------------------------------------------------------------------------
// Get text length in bytes, check for \0 character
unsigned int TextLength(const char *text)
{
unsigned int length = 0; //strlen(text)
if (text != NULL)
{
while (*text++) length++;
}
return length;
}
// Formatting of text with variables to 'embed'
// WARNING: String returned will expire after this function is called MAX_TEXTFORMAT_BUFFERS times
const char *TextFormat(const char *text, ...)
{
#ifndef MAX_TEXTFORMAT_BUFFERS
#define MAX_TEXTFORMAT_BUFFERS 4 // Maximum number of static buffers for text formatting
#endif
// We create an array of buffers so strings don't expire until MAX_TEXTFORMAT_BUFFERS invocations
static char buffers[MAX_TEXTFORMAT_BUFFERS][MAX_TEXT_BUFFER_LENGTH] = { 0 };
static int index = 0;
char *currentBuffer = buffers[index];
memset(currentBuffer, 0, MAX_TEXT_BUFFER_LENGTH); // Clear buffer before using
va_list args;
va_start(args, text);
vsnprintf(currentBuffer, MAX_TEXT_BUFFER_LENGTH, text, args);
va_end(args);
index += 1; // Move to next buffer for next function call
if (index >= MAX_TEXTFORMAT_BUFFERS) index = 0;
return currentBuffer;
}
// Get integer value from text
// NOTE: This function replaces atoi() [stdlib.h]
int TextToInteger(const char *text)
{
int value = 0;
int sign = 1;
if ((text[0] == '+') || (text[0] == '-'))
{
if (text[0] == '-') sign = -1;
text++;
}
for (int i = 0; ((text[i] >= '0') && (text[i] <= '9')); ++i) value = value*10 + (int)(text[i] - '0');
return value*sign;
}
#if defined(SUPPORT_TEXT_MANIPULATION)
// Copy one string to another, returns bytes copied
int TextCopy(char *dst, const char *src)
{
int bytes = 0;
if (dst != NULL)
{
while (*src != '\0')
{
*dst = *src;
dst++;
src++;
bytes++;
}
*dst = '\0';
}
return bytes;
}
// Check if two text string are equal
// REQUIRES: strcmp()
bool TextIsEqual(const char *text1, const char *text2)
{
bool result = false;
if ((text1 != NULL) && (text2 != NULL))
{
if (strcmp(text1, text2) == 0) result = true;
}
return result;
}
// Get a piece of a text string
const char *TextSubtext(const char *text, int position, int length)
{
static char buffer[MAX_TEXT_BUFFER_LENGTH] = { 0 };
memset(buffer, 0, MAX_TEXT_BUFFER_LENGTH);
int textLength = TextLength(text);
if (position >= textLength)
{
position = textLength - 1;
length = 0;
}
if (length >= textLength) length = textLength;
for (int c = 0 ; c < length ; c++)
{
*(buffer + c) = *(text + position);
text++;
}
*(buffer + length) = '\0';
return buffer;
}
// Replace text string
// REQUIRES: strlen(), strstr(), strncpy(), strcpy()
// WARNING: Allocated memory must be manually freed
char *TextReplace(char *text, const char *replace, const char *by)
{
// Sanity checks and initialization
if (!text || !replace || !by) return NULL;
char *result = NULL;
char *insertPoint = NULL; // Next insert point
char *temp = NULL; // Temp pointer
int replaceLen = 0; // Replace string length of (the string to remove)
int byLen = 0; // Replacement length (the string to replace replace by)
int lastReplacePos = 0; // Distance between replace and end of last replace
int count = 0; // Number of replacements
replaceLen = TextLength(replace);
if (replaceLen == 0) return NULL; // Empty replace causes infinite loop during count
byLen = TextLength(by);
// Count the number of replacements needed
insertPoint = text;
for (count = 0; (temp = strstr(insertPoint, replace)); count++) insertPoint = temp + replaceLen;
// Allocate returning string and point temp to it
temp = result = (char *)RL_MALLOC(TextLength(text) + (byLen - replaceLen)*count + 1);
if (!result) return NULL; // Memory could not be allocated
// First time through the loop, all the variable are set correctly from here on,
// - 'temp' points to the end of the result string
// - 'insertPoint' points to the next occurrence of replace in text
// - 'text' points to the remainder of text after "end of replace"
while (count--)
{
insertPoint = strstr(text, replace);
lastReplacePos = (int)(insertPoint - text);
temp = strncpy(temp, text, lastReplacePos) + lastReplacePos;
temp = strcpy(temp, by) + byLen;
text += lastReplacePos + replaceLen; // Move to next "end of replace"
}
// Copy remaind text part after replacement to result (pointed by moving temp)
strcpy(temp, text);
return result;
}
// Insert text in a specific position, moves all text forward
// WARNING: Allocated memory must be manually freed
char *TextInsert(const char *text, const char *insert, int position)
{
int textLen = TextLength(text);
int insertLen = TextLength(insert);
char *result = (char *)RL_MALLOC(textLen + insertLen + 1);
for (int i = 0; i < position; i++) result[i] = text[i];
for (int i = position; i < insertLen + position; i++) result[i] = insert[i];
for (int i = (insertLen + position); i < (textLen + insertLen); i++) result[i] = text[i];
result[textLen + insertLen] = '\0'; // Make sure text string is valid!
return result;
}
// Join text strings with delimiter
// REQUIRES: memset(), memcpy()
const char *TextJoin(const char **textList, int count, const char *delimiter)
{
static char buffer[MAX_TEXT_BUFFER_LENGTH] = { 0 };
memset(buffer, 0, MAX_TEXT_BUFFER_LENGTH);
char *textPtr = buffer;
int totalLength = 0;
int delimiterLen = TextLength(delimiter);
for (int i = 0; i < count; i++)
{
int textLength = TextLength(textList[i]);
// Make sure joined text could fit inside MAX_TEXT_BUFFER_LENGTH
if ((totalLength + textLength) < MAX_TEXT_BUFFER_LENGTH)
{
memcpy(textPtr, textList[i], textLength);
totalLength += textLength;
textPtr += textLength;
if ((delimiterLen > 0) && (i < (count - 1)))
{
memcpy(textPtr, delimiter, delimiterLen);
totalLength += delimiterLen;
textPtr += delimiterLen;
}
}
}
return buffer;
}
// Split string into multiple strings
// REQUIRES: memset()
const char **TextSplit(const char *text, char delimiter, int *count)
{
// NOTE: Current implementation returns a copy of the provided string with '\0' (string end delimiter)
// inserted between strings defined by "delimiter" parameter. No memory is dynamically allocated,
// all used memory is static... it has some limitations:
// 1. Maximum number of possible split strings is set by MAX_TEXTSPLIT_COUNT
// 2. Maximum size of text to split is MAX_TEXT_BUFFER_LENGTH
static const char *result[MAX_TEXTSPLIT_COUNT] = { NULL };
static char buffer[MAX_TEXT_BUFFER_LENGTH] = { 0 };
memset(buffer, 0, MAX_TEXT_BUFFER_LENGTH);
result[0] = buffer;
int counter = 0;
if (text != NULL)
{
counter = 1;
// Count how many substrings we have on text and point to every one
for (int i = 0; i < MAX_TEXT_BUFFER_LENGTH; i++)
{
buffer[i] = text[i];
if (buffer[i] == '\0') break;
else if (buffer[i] == delimiter)
{
buffer[i] = '\0'; // Set an end of string at this point
result[counter] = buffer + i + 1;
counter++;
if (counter == MAX_TEXTSPLIT_COUNT) break;
}
}
}
*count = counter;
return result;
}
// Append text at specific position and move cursor!
// REQUIRES: strcpy()
void TextAppend(char *text, const char *append, int *position)
{
strcpy(text + *position, append);
*position += TextLength(append);
}
// Find first text occurrence within a string
// REQUIRES: strstr()
int TextFindIndex(const char *text, const char *find)
{
int position = -1;
char *ptr = strstr(text, find);
if (ptr != NULL) position = (int)(ptr - text);
return position;
}
// Get upper case version of provided string
// REQUIRES: toupper()
const char *TextToUpper(const char *text)
{
static char buffer[MAX_TEXT_BUFFER_LENGTH] = { 0 };
memset(buffer, 0, MAX_TEXT_BUFFER_LENGTH);
for (int i = 0; i < MAX_TEXT_BUFFER_LENGTH; i++)
{
if (text[i] != '\0')
{
buffer[i] = (char)toupper(text[i]);
//if ((text[i] >= 'a') && (text[i] <= 'z')) buffer[i] = text[i] - 32;
// TODO: Support UTF-8 diacritics to upper-case
//if ((text[i] >= 'à') && (text[i] <= 'ý')) buffer[i] = text[i] - 32;
}
else { buffer[i] = '\0'; break; }
}
return buffer;
}
// Get lower case version of provided string
// REQUIRES: tolower()
const char *TextToLower(const char *text)
{
static char buffer[MAX_TEXT_BUFFER_LENGTH] = { 0 };
memset(buffer, 0, MAX_TEXT_BUFFER_LENGTH);
for (int i = 0; i < MAX_TEXT_BUFFER_LENGTH; i++)
{
if (text[i] != '\0')
{
buffer[i] = (char)tolower(text[i]);
//if ((text[i] >= 'A') && (text[i] <= 'Z')) buffer[i] = text[i] + 32;
}
else { buffer[i] = '\0'; break; }
}
return buffer;
}
// Get Pascal case notation version of provided string
// REQUIRES: toupper()
const char *TextToPascal(const char *text)
{
static char buffer[MAX_TEXT_BUFFER_LENGTH] = { 0 };
memset(buffer, 0, MAX_TEXT_BUFFER_LENGTH);
buffer[0] = (char)toupper(text[0]);
for (int i = 1, j = 1; i < MAX_TEXT_BUFFER_LENGTH; i++, j++)
{
if (text[j] != '\0')
{
if (text[j] != '_') buffer[i] = text[j];
else
{
j++;
buffer[i] = (char)toupper(text[j]);
}
}
else { buffer[i] = '\0'; break; }
}
return buffer;
}
// Encode text codepoint into UTF-8 text
// REQUIRES: memcpy()
// WARNING: Allocated memory must be manually freed
char *LoadUTF8(const int *codepoints, int length)
{
// We allocate enough memory fo fit all possible codepoints
// NOTE: 5 bytes for every codepoint should be enough
char *text = (char *)RL_CALLOC(length*5, 1);
const char *utf8 = NULL;
int size = 0;
for (int i = 0, bytes = 0; i < length; i++)
{
utf8 = CodepointToUTF8(codepoints[i], &bytes);
memcpy(text + size, utf8, bytes);
size += bytes;
}
// Resize memory to text length + string NULL terminator
void *ptr = RL_REALLOC(text, size + 1);
if (ptr != NULL) text = (char *)ptr;
return text;
}
// Unload UTF-8 text encoded from codepoints array
void UnloadUTF8(char *text)
{
RL_FREE(text);
}
// Load all codepoints from a UTF-8 text string, codepoints count returned by parameter
int *LoadCodepoints(const char *text, int *count)
{
int textLength = TextLength(text);
int codepointSize = 0;
int codepointCount = 0;
// Allocate a big enough buffer to store as many codepoints as text bytes
int *codepoints = (int *)RL_CALLOC(textLength, sizeof(int));
for (int i = 0; i < textLength; codepointCount++)
{
codepoints[codepointCount] = GetCodepointNext(text + i, &codepointSize);
i += codepointSize;
}
// Re-allocate buffer to the actual number of codepoints loaded
int *temp = (int *)RL_REALLOC(codepoints, codepointCount*sizeof(int));
if (temp != NULL) codepoints = temp;
*count = codepointCount;
return codepoints;
}
// Unload codepoints data from memory
void UnloadCodepoints(int *codepoints)
{
RL_FREE(codepoints);
}
// Get total number of characters(codepoints) in a UTF-8 encoded text, until '\0' is found
// NOTE: If an invalid UTF-8 sequence is encountered a '?'(0x3f) codepoint is counted instead
int GetCodepointCount(const char *text)
{
unsigned int length = 0;
char *ptr = (char *)&text[0];
while (*ptr != '\0')
{
int next = 0;
int letter = GetCodepointNext(ptr, &next);
if (letter == 0x3f) ptr += 1;
else ptr += next;
length++;
}
return length;
}
// Encode codepoint into utf8 text (char array length returned as parameter)
// NOTE: It uses a static array to store UTF-8 bytes
const char *CodepointToUTF8(int codepoint, int *utf8Size)
{
static char utf8[6] = { 0 };
int size = 0; // Byte size of codepoint
if (codepoint <= 0x7f)
{
utf8[0] = (char)codepoint;
size = 1;
}
else if (codepoint <= 0x7ff)
{
utf8[0] = (char)(((codepoint >> 6) & 0x1f) | 0xc0);
utf8[1] = (char)((codepoint & 0x3f) | 0x80);
size = 2;
}
else if (codepoint <= 0xffff)
{
utf8[0] = (char)(((codepoint >> 12) & 0x0f) | 0xe0);
utf8[1] = (char)(((codepoint >> 6) & 0x3f) | 0x80);
utf8[2] = (char)((codepoint & 0x3f) | 0x80);
size = 3;
}
else if (codepoint <= 0x10ffff)
{
utf8[0] = (char)(((codepoint >> 18) & 0x07) | 0xf0);
utf8[1] = (char)(((codepoint >> 12) & 0x3f) | 0x80);
utf8[2] = (char)(((codepoint >> 6) & 0x3f) | 0x80);
utf8[3] = (char)((codepoint & 0x3f) | 0x80);
size = 4;
}
*utf8Size = size;
return utf8;
}
#endif // SUPPORT_TEXT_MANIPULATION
// Get next codepoint in a UTF-8 encoded text, scanning until '\0' is found
// When a invalid UTF-8 byte is encountered we exit as soon as possible and a '?'(0x3f) codepoint is returned
// Total number of bytes processed are returned as a parameter
// NOTE: The standard says U+FFFD should be returned in case of errors
// but that character is not supported by the default font in raylib
int GetCodepoint(const char *text, int *codepointSize)
{
/*
UTF-8 specs from https://www.ietf.org/rfc/rfc3629.txt
Char. number range | UTF-8 octet sequence
(hexadecimal) | (binary)
--------------------+---------------------------------------------
0000 0000-0000 007F | 0xxxxxxx
0000 0080-0000 07FF | 110xxxxx 10xxxxxx
0000 0800-0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx
0001 0000-0010 FFFF | 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
*/
// NOTE: on decode errors we return as soon as possible
int codepoint = 0x3f; // Codepoint (defaults to '?')
int octet = (unsigned char)(text[0]); // The first UTF8 octet
*codepointSize = 1;
if (octet <= 0x7f)
{
// Only one octet (ASCII range x00-7F)
codepoint = text[0];
}
else if ((octet & 0xe0) == 0xc0)
{
// Two octets
// [0]xC2-DF [1]UTF8-tail(x80-BF)
unsigned char octet1 = text[1];
if ((octet1 == '\0') || ((octet1 >> 6) != 2)) { *codepointSize = 2; return codepoint; } // Unexpected sequence
if ((octet >= 0xc2) && (octet <= 0xdf))
{
codepoint = ((octet & 0x1f) << 6) | (octet1 & 0x3f);
*codepointSize = 2;
}
}
else if ((octet & 0xf0) == 0xe0)
{
// Three octets
unsigned char octet1 = text[1];
unsigned char octet2 = '\0';
if ((octet1 == '\0') || ((octet1 >> 6) != 2)) { *codepointSize = 2; return codepoint; } // Unexpected sequence
octet2 = text[2];
if ((octet2 == '\0') || ((octet2 >> 6) != 2)) { *codepointSize = 3; return codepoint; } // Unexpected sequence
// [0]xE0 [1]xA0-BF [2]UTF8-tail(x80-BF)
// [0]xE1-EC [1]UTF8-tail [2]UTF8-tail(x80-BF)
// [0]xED [1]x80-9F [2]UTF8-tail(x80-BF)
// [0]xEE-EF [1]UTF8-tail [2]UTF8-tail(x80-BF)
if (((octet == 0xe0) && !((octet1 >= 0xa0) && (octet1 <= 0xbf))) ||
((octet == 0xed) && !((octet1 >= 0x80) && (octet1 <= 0x9f)))) { *codepointSize = 2; return codepoint; }
if ((octet >= 0xe0) && (octet <= 0xef))
{
codepoint = ((octet & 0xf) << 12) | ((octet1 & 0x3f) << 6) | (octet2 & 0x3f);
*codepointSize = 3;
}
}
else if ((octet & 0xf8) == 0xf0)
{
// Four octets
if (octet > 0xf4) return codepoint;
unsigned char octet1 = text[1];
unsigned char octet2 = '\0';
unsigned char octet3 = '\0';
if ((octet1 == '\0') || ((octet1 >> 6) != 2)) { *codepointSize = 2; return codepoint; } // Unexpected sequence
octet2 = text[2];
if ((octet2 == '\0') || ((octet2 >> 6) != 2)) { *codepointSize = 3; return codepoint; } // Unexpected sequence
octet3 = text[3];
if ((octet3 == '\0') || ((octet3 >> 6) != 2)) { *codepointSize = 4; return codepoint; } // Unexpected sequence
// [0]xF0 [1]x90-BF [2]UTF8-tail [3]UTF8-tail
// [0]xF1-F3 [1]UTF8-tail [2]UTF8-tail [3]UTF8-tail
// [0]xF4 [1]x80-8F [2]UTF8-tail [3]UTF8-tail
if (((octet == 0xf0) && !((octet1 >= 0x90) && (octet1 <= 0xbf))) ||
((octet == 0xf4) && !((octet1 >= 0x80) && (octet1 <= 0x8f)))) { *codepointSize = 2; return codepoint; } // Unexpected sequence
if (octet >= 0xf0)
{
codepoint = ((octet & 0x7) << 18) | ((octet1 & 0x3f) << 12) | ((octet2 & 0x3f) << 6) | (octet3 & 0x3f);
*codepointSize = 4;
}
}
if (codepoint > 0x10ffff) codepoint = 0x3f; // Codepoints after U+10ffff are invalid
return codepoint;
}
// Get next codepoint in a byte sequence and bytes processed
int GetCodepointNext(const char *text, int *codepointSize)
{
const char *ptr = text;
int codepoint = 0x3f; // Codepoint (defaults to '?')
*codepointSize = 0;
// Get current codepoint and bytes processed
if (0xf0 == (0xf8 & ptr[0]))
{
// 4 byte UTF-8 codepoint
codepoint = ((0x07 & ptr[0]) << 18) | ((0x3f & ptr[1]) << 12) | ((0x3f & ptr[2]) << 6) | (0x3f & ptr[3]);
*codepointSize = 4;
}
else if (0xe0 == (0xf0 & ptr[0]))
{
// 3 byte UTF-8 codepoint */
codepoint = ((0x0f & ptr[0]) << 12) | ((0x3f & ptr[1]) << 6) | (0x3f & ptr[2]);
*codepointSize = 3;
}
else if (0xc0 == (0xe0 & ptr[0]))
{
// 2 byte UTF-8 codepoint
codepoint = ((0x1f & ptr[0]) << 6) | (0x3f & ptr[1]);
*codepointSize = 2;
}
else
{
// 1 byte UTF-8 codepoint
codepoint = ptr[0];
*codepointSize = 1;
}
return codepoint;
}
// Get previous codepoint in a byte sequence and bytes processed
int GetCodepointPrevious(const char *text, int *codepointSize)
{
const char *ptr = text;
int codepoint = 0x3f; // Codepoint (defaults to '?')
int cpSize = 0;
*codepointSize = 0;
// Move to previous codepoint
do ptr--;
while (((0x80 & ptr[0]) != 0) && ((0xc0 & ptr[0]) == 0x80));
codepoint = GetCodepointNext(ptr, &cpSize);
if (codepoint != 0) *codepointSize = cpSize;
return codepoint;
}
//----------------------------------------------------------------------------------
// Module specific Functions Definition
//----------------------------------------------------------------------------------
#if defined(SUPPORT_FILEFORMAT_FNT)
// Read a line from memory
// REQUIRES: memcpy()
// NOTE: Returns the number of bytes read
static int GetLine(const char *origin, char *buffer, int maxLength)
{
int count = 0;
for (; count < maxLength; count++) if (origin[count] == '\n') break;
memcpy(buffer, origin, count);
return count;
}
// Load a BMFont file (AngelCode font file)
// REQUIRES: strstr(), sscanf(), strrchr(), memcpy()
static Font LoadBMFont(const char *fileName)
{
#define MAX_BUFFER_SIZE 256
Font font = { 0 };
char buffer[MAX_BUFFER_SIZE] = { 0 };
char *searchPoint = NULL;
int fontSize = 0;
int glyphCount = 0;
int imWidth = 0;
int imHeight = 0;
char imFileName[129] = { 0 };
int base = 0; // Useless data
char *fileText = LoadFileText(fileName);
if (fileText == NULL) return font;
char *fileTextPtr = fileText;
// NOTE: We skip first line, it contains no useful information
int lineBytes = GetLine(fileTextPtr, buffer, MAX_BUFFER_SIZE);
fileTextPtr += (lineBytes + 1);
// Read line data
lineBytes = GetLine(fileTextPtr, buffer, MAX_BUFFER_SIZE);
searchPoint = strstr(buffer, "lineHeight");
sscanf(searchPoint, "lineHeight=%i base=%i scaleW=%i scaleH=%i", &fontSize, &base, &imWidth, &imHeight);
fileTextPtr += (lineBytes + 1);
TRACELOGD("FONT: [%s] Loaded font info:", fileName);
TRACELOGD(" > Base size: %i", fontSize);
TRACELOGD(" > Texture scale: %ix%i", imWidth, imHeight);
lineBytes = GetLine(fileTextPtr, buffer, MAX_BUFFER_SIZE);
searchPoint = strstr(buffer, "file");
sscanf(searchPoint, "file=\"%128[^\"]\"", imFileName);
fileTextPtr += (lineBytes + 1);
TRACELOGD(" > Texture filename: %s", imFileName);
lineBytes = GetLine(fileTextPtr, buffer, MAX_BUFFER_SIZE);
searchPoint = strstr(buffer, "count");
sscanf(searchPoint, "count=%i", &glyphCount);
fileTextPtr += (lineBytes + 1);
TRACELOGD(" > Chars count: %i", glyphCount);
// Compose correct path using route of .fnt file (fileName) and imFileName
char *imPath = NULL;
char *lastSlash = NULL;
lastSlash = strrchr(fileName, '/');
if (lastSlash == NULL) lastSlash = strrchr(fileName, '\\');
if (lastSlash != NULL)
{
// NOTE: We need some extra space to avoid memory corruption on next allocations!
imPath = (char *)RL_CALLOC(TextLength(fileName) - TextLength(lastSlash) + TextLength(imFileName) + 4, 1);
memcpy(imPath, fileName, TextLength(fileName) - TextLength(lastSlash) + 1);
memcpy(imPath + TextLength(fileName) - TextLength(lastSlash) + 1, imFileName, TextLength(imFileName));
}
else imPath = imFileName;
TRACELOGD(" > Image loading path: %s", imPath);
Image imFont = LoadImage(imPath);
if (imFont.format == PIXELFORMAT_UNCOMPRESSED_GRAYSCALE)
{
// Convert image to GRAYSCALE + ALPHA, using the mask as the alpha channel
Image imFontAlpha = {
.data = RL_CALLOC(imFont.width*imFont.height, 2),
.width = imFont.width,
.height = imFont.height,
.mipmaps = 1,
.format = PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA
};
for (int p = 0, i = 0; p < (imFont.width*imFont.height*2); p += 2, i++)
{
((unsigned char *)(imFontAlpha.data))[p] = 0xff;
((unsigned char *)(imFontAlpha.data))[p + 1] = ((unsigned char *)imFont.data)[i];
}
UnloadImage(imFont);
imFont = imFontAlpha;
}
font.texture = LoadTextureFromImage(imFont);
if (lastSlash != NULL) RL_FREE(imPath);
// Fill font characters info data
font.baseSize = fontSize;
font.glyphCount = glyphCount;
font.glyphPadding = 0;
font.glyphs = (GlyphInfo *)RL_MALLOC(glyphCount*sizeof(GlyphInfo));
font.recs = (Rectangle *)RL_MALLOC(glyphCount*sizeof(Rectangle));
int charId, charX, charY, charWidth, charHeight, charOffsetX, charOffsetY, charAdvanceX;
for (int i = 0; i < glyphCount; i++)
{
lineBytes = GetLine(fileTextPtr, buffer, MAX_BUFFER_SIZE);
sscanf(buffer, "char id=%i x=%i y=%i width=%i height=%i xoffset=%i yoffset=%i xadvance=%i",
&charId, &charX, &charY, &charWidth, &charHeight, &charOffsetX, &charOffsetY, &charAdvanceX);
fileTextPtr += (lineBytes + 1);
// Get character rectangle in the font atlas texture
font.recs[i] = (Rectangle){ (float)charX, (float)charY, (float)charWidth, (float)charHeight };
// Save data properly in sprite font
font.glyphs[i].value = charId;
font.glyphs[i].offsetX = charOffsetX;
font.glyphs[i].offsetY = charOffsetY;
font.glyphs[i].advanceX = charAdvanceX;
// Fill character image data from imFont data
font.glyphs[i].image = ImageFromImage(imFont, font.recs[i]);
}
UnloadImage(imFont);
UnloadFileText(fileText);
if (font.texture.id == 0)
{
UnloadFont(font);
font = GetFontDefault();
TRACELOG(LOG_WARNING, "FONT: [%s] Failed to load texture, reverted to default font", fileName);
}
else TRACELOG(LOG_INFO, "FONT: [%s] Font loaded successfully (%i glyphs)", fileName, font.glyphCount);
return font;
}
#endif
#endif // SUPPORT_MODULE_RTEXT
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