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raylib/src/text.c
raysan5 4492a70a4b Support UTF8 basic characters on ImageTextEx() 
Supported UTF8 range equivalent to [128..255] (80h..FFh)
Exposed and renamed text function GetGlyphIndex()
Renamed spriteFont parameter name to simply font
Small security check on transmission mission ending screen
2018-02-18 18:07:57 +01:00

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/**********************************************************************************************
*
* raylib.text - Basic functions to load SpriteFonts and draw Text
*
* CONFIGURATION:
*
* #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
*
* DEPENDENCIES:
* stb_truetype - Load TTF file and rasterize characters data
*
*
* LICENSE: zlib/libpng
*
* Copyright (c) 2014-2018 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.
*
**********************************************************************************************/
// Default supported features
//-------------------------------------
#define SUPPORT_DEFAULT_FONT
#define SUPPORT_FILEFORMAT_FNT
#define SUPPORT_FILEFORMAT_TTF
//-------------------------------------
#include "raylib.h"
#include <stdlib.h> // Required for: malloc(), free()
#include <string.h> // Required for: strlen()
#include <stdarg.h> // Required for: va_list, va_start(), vfprintf(), va_end()
#include <stdio.h> // Required for: FILE, fopen(), fclose(), fscanf(), feof(), rewind(), fgets()
#include "utils.h" // Required for: fopen() Android mapping
#if defined(SUPPORT_FILEFORMAT_TTF)
// Following libs are used on LoadTTF()
#define STBTT_STATIC // Define stb_truetype functions static to this module
#define STB_TRUETYPE_IMPLEMENTATION
#include "external/stb_truetype.h" // Required for: stbtt_BakeFontBitmap()
#endif
// Rectangle packing functions (not used at the moment)
//#define STB_RECT_PACK_IMPLEMENTATION
//#include "stb_rect_pack.h"
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
#define MAX_FORMATTEXT_LENGTH 256
#define MAX_SUBTEXT_LENGTH 256
//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
// ...
//----------------------------------------------------------------------------------
// Global variables
//----------------------------------------------------------------------------------
#if defined(SUPPORT_DEFAULT_FONT)
static SpriteFont defaultFont; // Default font provided by raylib
// NOTE: defaultFont is loaded on InitWindow and disposed on CloseWindow [module: core]
#endif
//----------------------------------------------------------------------------------
// Other Modules Functions Declaration (required by text)
//----------------------------------------------------------------------------------
//...
//----------------------------------------------------------------------------------
// Module specific Functions Declaration
//----------------------------------------------------------------------------------
static SpriteFont LoadImageFont(Image image, Color key, int firstChar); // Load a Image font file (XNA style)
#if defined(SUPPORT_FILEFORMAT_FNT)
static SpriteFont LoadBMFont(const char *fileName); // Load a BMFont file (AngelCode font file)
#endif
#if defined(SUPPORT_FILEFORMAT_TTF)
static SpriteFont LoadTTF(const char *fileName, int fontSize, int charsCount, int *fontChars); // Load spritefont from TTF data
#endif
#if defined(SUPPORT_DEFAULT_FONT)
extern void LoadDefaultFont(void);
extern void UnloadDefaultFont(void);
#endif
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
#if defined(SUPPORT_DEFAULT_FONT)
// Load raylib default font
extern void LoadDefaultFont(void)
{
#define BIT_CHECK(a,b) ((a) & (1 << (b)))
// NOTE: Using UTF8 encoding table for Unicode U+0000..U+00FF Basic Latin + Latin-1 Supplement
// http://www.utf8-chartable.de/unicode-utf8-table.pl
defaultFont.charsCount = 224; // Number of chars included in our default font
// Default font is directly defined here (data generated from a sprite font image)
// This way, we reconstruct SpriteFont without creating large global variables
// This data is automatically allocated to Stack and automatically deallocated at the end of this function
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
//----------------------------------------------------------------------
int imWidth = 128;
int imHeight = 128;
Color *imagePixels = (Color *)malloc(imWidth*imHeight*sizeof(Color));
for (int i = 0; i < imWidth*imHeight; i++) imagePixels[i] = BLANK; // Initialize array
int counter = 0; // Font data elements counter
// Fill imgData with defaultFontData (convert from bit to pixel!)
for (int i = 0; i < imWidth*imHeight; i += 32)
{
for (int j = 31; j >= 0; j--)
{
if (BIT_CHECK(defaultFontData[counter], j)) imagePixels[i+j] = WHITE;
}
counter++;
if (counter > 512) counter = 0; // Security check...
}
//FILE *myimage = fopen("default_font.raw", "wb");
//fwrite(image.pixels, 1, 128*128*4, myimage);
//fclose(myimage);
Image image = LoadImageEx(imagePixels, imWidth, imHeight);
ImageFormat(&image, UNCOMPRESSED_GRAY_ALPHA);
free(imagePixels);
defaultFont.texture = LoadTextureFromImage(image);
UnloadImage(image);
// Reconstruct charSet using charsWidth[], charsHeight, charsDivisor, charsCount
//------------------------------------------------------------------------------
// Allocate space for our characters info data
// NOTE: This memory should be freed at end! --> CloseWindow()
defaultFont.chars = (CharInfo *)malloc(defaultFont.charsCount*sizeof(CharInfo));
int currentLine = 0;
int currentPosX = charsDivisor;
int testPosX = charsDivisor;
for (int i = 0; i < defaultFont.charsCount; i++)
{
defaultFont.chars[i].value = 32 + i; // First char is 32
defaultFont.chars[i].rec.x = currentPosX;
defaultFont.chars[i].rec.y = charsDivisor + currentLine*(charsHeight + charsDivisor);
defaultFont.chars[i].rec.width = charsWidth[i];
defaultFont.chars[i].rec.height = charsHeight;
testPosX += (defaultFont.chars[i].rec.width + charsDivisor);
if (testPosX >= defaultFont.texture.width)
{
currentLine++;
currentPosX = 2*charsDivisor + charsWidth[i];
testPosX = currentPosX;
defaultFont.chars[i].rec.x = charsDivisor;
defaultFont.chars[i].rec.y = charsDivisor + currentLine*(charsHeight + charsDivisor);
}
else currentPosX = testPosX;
// NOTE: On default font character offsets and xAdvance are not required
defaultFont.chars[i].offsetX = 0;
defaultFont.chars[i].offsetY = 0;
defaultFont.chars[i].advanceX = 0;
}
defaultFont.baseSize = defaultFont.chars[0].rec.height;
TraceLog(LOG_INFO, "[TEX ID %i] Default font loaded successfully", defaultFont.texture.id);
}
// Unload raylib default font
extern void UnloadDefaultFont(void)
{
UnloadTexture(defaultFont.texture);
free(defaultFont.chars);
}
#endif // SUPPORT_DEFAULT_FONT
// Get the default font, useful to be used with extended parameters
SpriteFont GetDefaultFont()
{
#if defined(SUPPORT_DEFAULT_FONT)
return defaultFont;
#else
SpriteFont font = { 0 };
return font;
#endif
}
// Load SpriteFont from file into GPU memory (VRAM)
SpriteFont LoadSpriteFont(const char *fileName)
{
// Default hardcoded values for ttf file loading
#define DEFAULT_TTF_FONTSIZE 32 // Font first character (32 - space)
#define DEFAULT_TTF_NUMCHARS 95 // ASCII 32..126 is 95 glyphs
#define DEFAULT_FIRST_CHAR 32 // Expected first char for image spritefont
SpriteFont spriteFont = { 0 };
#if defined(SUPPORT_FILEFORMAT_TTF)
if (IsFileExtension(fileName, ".ttf")) spriteFont = LoadSpriteFontEx(fileName, DEFAULT_TTF_FONTSIZE, 0, NULL);
else
#endif
#if defined(SUPPORT_FILEFORMAT_FNT)
if (IsFileExtension(fileName, ".fnt")) spriteFont = LoadBMFont(fileName);
else
#endif
{
Image image = LoadImage(fileName);
if (image.data != NULL) spriteFont = LoadImageFont(image, MAGENTA, DEFAULT_FIRST_CHAR);
UnloadImage(image);
}
if (spriteFont.texture.id == 0)
{
TraceLog(LOG_WARNING, "[%s] SpriteFont could not be loaded, using default font", fileName);
spriteFont = GetDefaultFont();
}
else SetTextureFilter(spriteFont.texture, FILTER_POINT); // By default we set point filter (best performance)
return spriteFont;
}
// Load SpriteFont 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
SpriteFont LoadSpriteFontEx(const char *fileName, int fontSize, int charsCount, int *fontChars)
{
SpriteFont spriteFont = { 0 };
int totalChars = 95; // Default charset [32..126]
#if defined(SUPPORT_FILEFORMAT_TTF)
if (IsFileExtension(fileName, ".ttf"))
{
if (charsCount != 0) totalChars = charsCount;
if (fontChars == NULL)
{
fontChars = (int *)malloc(totalChars*sizeof(int));
for (int i = 0; i < totalChars; i++) fontChars[i] = i + 32; // Default first character: SPACE[32]
}
spriteFont = LoadTTF(fileName, fontSize, totalChars, fontChars);
}
#endif
if (spriteFont.texture.id == 0)
{
TraceLog(LOG_WARNING, "[%s] SpriteFont could not be generated, using default font", fileName);
spriteFont = GetDefaultFont();
}
return spriteFont;
}
// Unload SpriteFont from GPU memory (VRAM)
void UnloadSpriteFont(SpriteFont font)
{
// NOTE: Make sure spriteFont is not default font (fallback)
if (font.texture.id != GetDefaultFont().texture.id)
{
UnloadTexture(font.texture);
free(font.chars);
TraceLog(LOG_DEBUG, "Unloaded sprite font data");
}
}
// 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 (GetDefaultFont().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(GetDefaultFont(), text, position, (float)fontSize, spacing, color);
}
}
// Draw text using SpriteFont
// NOTE: chars spacing is NOT proportional to fontSize
void DrawTextEx(SpriteFont font, const char *text, Vector2 position, float fontSize, int spacing, Color tint)
{
int length = strlen(text);
int textOffsetX = 0; // Offset between characters
int textOffsetY = 0; // Required for line break!
float scaleFactor;
unsigned char letter; // Current character
int index; // Index position in sprite font
scaleFactor = fontSize/font.baseSize;
// NOTE: Some ugly hacks are made to support Latin-1 Extended characters directly
// written in C code files (codified by default as UTF-8)
for (int i = 0; i < length; i++)
{
if ((unsigned char)text[i] == '\n')
{
// NOTE: Fixed line spacing of 1.5 lines
textOffsetY += (int)((font.baseSize + font.baseSize/2)*scaleFactor);
textOffsetX = 0;
}
else
{
if ((unsigned char)text[i] == 0xc2) // UTF-8 encoding identification HACK!
{
// Support UTF-8 encoded values from [0xc2 0x80] -> [0xc2 0xbf](¿)
letter = (unsigned char)text[i + 1];
index = GetGlyphIndex(font, (int)letter);
i++;
}
else if ((unsigned char)text[i] == 0xc3) // UTF-8 encoding identification HACK!
{
// Support UTF-8 encoded values from [0xc3 0x80](À) -> [0xc3 0xbf](ÿ)
letter = (unsigned char)text[i + 1];
index = GetGlyphIndex(font, (int)letter + 64);
i++;
}
else index = GetGlyphIndex(font, (unsigned char)text[i]);
if ((unsigned char)text[i] != ' ')
{
DrawTexturePro(font.texture, font.chars[index].rec,
(Rectangle){ position.x + textOffsetX + font.chars[index].offsetX*scaleFactor,
position.y + textOffsetY + font.chars[index].offsetY*scaleFactor,
font.chars[index].rec.width*scaleFactor,
font.chars[index].rec.height*scaleFactor }, (Vector2){ 0, 0 }, 0.0f, tint);
}
if (font.chars[index].advanceX == 0) textOffsetX += (int)(font.chars[index].rec.width*scaleFactor + spacing);
else textOffsetX += (int)(font.chars[index].advanceX*scaleFactor + spacing);
}
}
}
// Formatting of text with variables to 'embed'
const char *FormatText(const char *text, ...)
{
static char buffer[MAX_FORMATTEXT_LENGTH];
va_list args;
va_start(args, text);
vsprintf(buffer, text, args);
va_end(args);
return buffer;
}
// Get a piece of a text string
const char *SubText(const char *text, int position, int length)
{
static char buffer[MAX_SUBTEXT_LENGTH];
int textLength = strlen(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;
}
// Measure string width for default font
int MeasureText(const char *text, int fontSize)
{
Vector2 vec = { 0.0f, 0.0f };
// Check if default font has been loaded
if (GetDefaultFont().texture.id != 0)
{
int defaultFontSize = 10; // Default Font chars height in pixel
if (fontSize < defaultFontSize) fontSize = defaultFontSize;
int spacing = fontSize/defaultFontSize;
vec = MeasureTextEx(GetDefaultFont(), text, (float)fontSize, spacing);
}
return (int)vec.x;
}
// Measure string size for SpriteFont
Vector2 MeasureTextEx(SpriteFont font, const char *text, float fontSize, int spacing)
{
int len = strlen(text);
int tempLen = 0; // Used to count longer text line num chars
int lenCounter = 0;
float textWidth = 0;
float tempTextWidth = 0; // Used to count longer text line width
float textHeight = (float)font.baseSize;
float scaleFactor = fontSize/(float)font.baseSize;
for (int i = 0; i < len; i++)
{
lenCounter++;
if (text[i] != '\n')
{
int index = GetGlyphIndex(font, (int)text[i]);
if (font.chars[index].advanceX != 0) textWidth += font.chars[index].advanceX;
else textWidth += (font.chars[index].rec.width + font.chars[index].offsetX);
}
else
{
if (tempTextWidth < textWidth) tempTextWidth = textWidth;
lenCounter = 0;
textWidth = 0;
textHeight += ((float)font.baseSize*1.5f); // NOTE: Fixed line spacing of 1.5 lines
}
if (tempLen < lenCounter) tempLen = lenCounter;
}
if (tempTextWidth < textWidth) tempTextWidth = textWidth;
Vector2 vec;
vec.x = tempTextWidth*scaleFactor + (float)((tempLen - 1)*spacing); // Adds chars spacing to measure
vec.y = textHeight*scaleFactor;
return vec;
}
// Returns index position for a unicode character on spritefont
int GetGlyphIndex(SpriteFont font, int character)
{
#define UNORDERED_CHARSET
#if defined(UNORDERED_CHARSET)
int index = 0;
for (int i = 0; i < font.charsCount; i++)
{
if (font.chars[i].value == character)
{
index = i;
break;
}
}
return index;
#else
return (character - 32);
#endif
}
// Shows current FPS on top-left corner
// NOTE: Uses default font
void DrawFPS(int posX, int posY)
{
// NOTE: We are rendering fps every second for better viewing on high framerates
static int fps = 0;
static int counter = 0;
static int refreshRate = 20;
if (counter < refreshRate) counter++;
else
{
fps = GetFPS();
refreshRate = fps;
counter = 0;
}
// NOTE: We have rounding errors every frame, so it oscillates a lot
DrawText(FormatText("%2i FPS", fps), posX, posY, 20, LIME);
}
//----------------------------------------------------------------------------------
// Module specific Functions Definition
//----------------------------------------------------------------------------------
// Load an Image font file (XNA style)
static SpriteFont LoadImageFont(Image image, Color key, int firstChar)
{
#define COLOR_EQUAL(col1, col2) ((col1.r == col2.r)&&(col1.g == col2.g)&&(col1.b == col2.b)&&(col1.a == col2.a))
int charSpacing = 0;
int lineSpacing = 0;
int x = 0;
int y = 0;
// Default number of characters supported
#define MAX_FONTCHARS 256
// 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_FONTCHARS];
Rectangle tempCharRecs[MAX_FONTCHARS];
Color *pixels = GetImageData(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;
}
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 = xPosToRead;
tempCharRecs[index].y = lineSpacing + lineToRead*(charHeight + lineSpacing);
tempCharRecs[index].height = charHeight;
int charWidth = 0;
while (!COLOR_EQUAL(pixels[(lineSpacing + (charHeight+lineSpacing)*lineToRead)*image.width + xPosToRead + charWidth], key)) charWidth++;
tempCharRecs[index].width = charWidth;
index++;
xPosToRead += (charWidth + charSpacing);
}
lineToRead++;
xPosToRead = charSpacing;
}
TraceLog(LOG_DEBUG, "SpriteFont data parsed correctly from image");
// NOTE: We need to remove key color borders from image to avoid weird
// artifacts on texture scaling when using FILTER_BILINEAR or 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 = LoadImageEx(pixels, image.width, image.height);
free(pixels); // Free pixels array memory
// Create spritefont with all data parsed from image
SpriteFont spriteFont = { 0 };
spriteFont.texture = LoadTextureFromImage(fontClear); // Convert processed image to OpenGL texture
spriteFont.charsCount = index;
UnloadImage(fontClear); // Unload processed image once converted to texture
// We got tempCharValues and tempCharsRecs populated with chars data
// Now we move temp data to sized charValues and charRecs arrays
spriteFont.chars = (CharInfo *)malloc(spriteFont.charsCount*sizeof(CharInfo));
for (int i = 0; i < spriteFont.charsCount; i++)
{
spriteFont.chars[i].value = tempCharValues[i];
spriteFont.chars[i].rec = tempCharRecs[i];
// NOTE: On image based fonts (XNA style), character offsets and xAdvance are not required (set to 0)
spriteFont.chars[i].offsetX = 0;
spriteFont.chars[i].offsetY = 0;
spriteFont.chars[i].advanceX = 0;
}
spriteFont.baseSize = spriteFont.chars[0].rec.height;
TraceLog(LOG_INFO, "Image file loaded correctly as SpriteFont");
return spriteFont;
}
#if defined(SUPPORT_FILEFORMAT_FNT)
// Load a BMFont file (AngelCode font file)
static SpriteFont LoadBMFont(const char *fileName)
{
#define MAX_BUFFER_SIZE 256
SpriteFont font = { 0 };
font.texture.id = 0;
char buffer[MAX_BUFFER_SIZE];
char *searchPoint = NULL;
int fontSize = 0;
int texWidth, texHeight;
char texFileName[128];
int charsCount = 0;
int base; // Useless data
FILE *fntFile;
fntFile = fopen(fileName, "rt");
if (fntFile == NULL)
{
TraceLog(LOG_WARNING, "[%s] FNT file could not be opened", fileName);
return font;
}
// NOTE: We skip first line, it contains no useful information
fgets(buffer, MAX_BUFFER_SIZE, fntFile);
//searchPoint = strstr(buffer, "size");
//sscanf(searchPoint, "size=%i", &fontSize);
fgets(buffer, MAX_BUFFER_SIZE, fntFile);
searchPoint = strstr(buffer, "lineHeight");
sscanf(searchPoint, "lineHeight=%i base=%i scaleW=%i scaleH=%i", &fontSize, &base, &texWidth, &texHeight);
TraceLog(LOG_DEBUG, "[%s] Font size: %i", fileName, fontSize);
TraceLog(LOG_DEBUG, "[%s] Font texture scale: %ix%i", fileName, texWidth, texHeight);
fgets(buffer, MAX_BUFFER_SIZE, fntFile);
searchPoint = strstr(buffer, "file");
sscanf(searchPoint, "file=\"%128[^\"]\"", texFileName);
TraceLog(LOG_DEBUG, "[%s] Font texture filename: %s", fileName, texFileName);
fgets(buffer, MAX_BUFFER_SIZE, fntFile);
searchPoint = strstr(buffer, "count");
sscanf(searchPoint, "count=%i", &charsCount);
TraceLog(LOG_DEBUG, "[%s] Font num chars: %i", fileName, charsCount);
// Compose correct path using route of .fnt file (fileName) and texFileName
char *texPath = NULL;
char *lastSlash = NULL;
lastSlash = strrchr(fileName, '/');
// NOTE: We need some extra space to avoid memory corruption on next allocations!
texPath = malloc(strlen(fileName) - strlen(lastSlash) + strlen(texFileName) + 4);
// NOTE: strcat() and strncat() required a '\0' terminated string to work!
*texPath = '\0';
strncat(texPath, fileName, strlen(fileName) - strlen(lastSlash) + 1);
strncat(texPath, texFileName, strlen(texFileName));
TraceLog(LOG_DEBUG, "[%s] Font texture loading path: %s", fileName, texPath);
Image imFont = LoadImage(texPath);
if (imFont.format == UNCOMPRESSED_GRAYSCALE)
{
Image imCopy = ImageCopy(imFont);
for (int i = 0; i < imCopy.width*imCopy.height; i++) ((unsigned char *)imCopy.data)[i] = 0xff; // WHITE pixel
ImageAlphaMask(&imCopy, imFont);
font.texture = LoadTextureFromImage(imCopy);
UnloadImage(imCopy);
}
else font.texture = LoadTextureFromImage(imFont);
font.baseSize = fontSize;
font.charsCount = charsCount;
font.chars = (CharInfo *)malloc(charsCount*sizeof(CharInfo));
UnloadImage(imFont);
free(texPath);
int charId, charX, charY, charWidth, charHeight, charOffsetX, charOffsetY, charAdvanceX;
for (int i = 0; i < charsCount; i++)
{
fgets(buffer, MAX_BUFFER_SIZE, fntFile);
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);
// Save data properly in sprite font
font.chars[i].value = charId;
font.chars[i].rec = (Rectangle){ charX, charY, charWidth, charHeight };
font.chars[i].offsetX = charOffsetX;
font.chars[i].offsetY = charOffsetY;
font.chars[i].advanceX = charAdvanceX;
}
fclose(fntFile);
if (font.texture.id == 0)
{
UnloadSpriteFont(font);
font = GetDefaultFont();
}
else TraceLog(LOG_INFO, "[%s] SpriteFont loaded successfully", fileName);
return font;
}
#endif
#if defined(SUPPORT_FILEFORMAT_TTF)
// Generate a sprite font from TTF file data (font size required)
// TODO: Review texture packing method and generation (use oversampling)
static SpriteFont LoadTTF(const char *fileName, int fontSize, int charsCount, int *fontChars)
{
#define MAX_TTF_SIZE 16 // Maximum ttf file size in MB
// NOTE: Font texture size is predicted (being as much conservative as possible)
// Predictive method consist of supposing same number of chars by line-column (sqrtf)
// and a maximum character width of 3/4 of fontSize... it worked ok with all my tests...
// Calculate next power-of-two value
float guessSize = ceilf((float)fontSize*3/4)*ceilf(sqrtf((float)charsCount));
int textureSize = (int)powf(2, ceilf(logf((float)guessSize)/logf(2))); // Calculate next POT
TraceLog(LOG_INFO, "TTF spritefont loading: Predicted texture size: %ix%i", textureSize, textureSize);
unsigned char *ttfBuffer = (unsigned char *)malloc(MAX_TTF_SIZE*1024*1024);
unsigned char *dataBitmap = (unsigned char *)malloc(textureSize*textureSize*sizeof(unsigned char)); // One channel bitmap returned!
stbtt_bakedchar *charData = (stbtt_bakedchar *)malloc(sizeof(stbtt_bakedchar)*charsCount);
SpriteFont font = { 0 };
FILE *ttfFile = fopen(fileName, "rb");
if (ttfFile == NULL)
{
TraceLog(LOG_WARNING, "[%s] TTF file could not be opened", fileName);
return font;
}
// NOTE: We try reading up to 16 MB of elements of 1 byte
fread(ttfBuffer, 1, MAX_TTF_SIZE*1024*1024, ttfFile);
// Find font baseline (vertical origin of the font)
// NOTE: This value is required because y-offset depends on it!
stbtt_fontinfo fontInfo;
int ascent, baseline;
float scale;
stbtt_InitFont(&fontInfo, ttfBuffer, 0);
scale = stbtt_ScaleForPixelHeight(&fontInfo, fontSize);
stbtt_GetFontVMetrics(&fontInfo, &ascent, 0, 0);
baseline = (int)(ascent*scale);
if (fontChars[0] != 32) TraceLog(LOG_WARNING, "TTF spritefont loading: first character is not SPACE(32) character");
// NOTE: Using stb_truetype crappy packing method, no guarantee the font fits the image...
// TODO: Replace this function by a proper packing method and support random chars order,
// we already receive a list (fontChars) with the ordered expected characters
int result = stbtt_BakeFontBitmap(ttfBuffer, 0, fontSize, dataBitmap, textureSize, textureSize, fontChars[0], charsCount, charData);
//if (result > 0) TraceLog(LOG_INFO, "TTF spritefont loading: first unused row of generated bitmap: %i", result);
if (result < 0) TraceLog(LOG_WARNING, "TTF spritefont loading: Not all the characters fit in the font");
free(ttfBuffer);
// Convert image data from grayscale to to UNCOMPRESSED_GRAY_ALPHA
unsigned char *dataGrayAlpha = (unsigned char *)malloc(textureSize*textureSize*sizeof(unsigned char)*2); // Two channels
for (int i = 0, k = 0; i < textureSize*textureSize; i++, k += 2)
{
dataGrayAlpha[k] = 255;
dataGrayAlpha[k + 1] = dataBitmap[i];
}
free(dataBitmap);
// Sprite font generation from TTF extracted data
Image image;
image.width = textureSize;
image.height = textureSize;
image.mipmaps = 1;
image.format = UNCOMPRESSED_GRAY_ALPHA;
image.data = dataGrayAlpha;
font.texture = LoadTextureFromImage(image);
//SavePNG("generated_ttf_image.png", (unsigned char *)image.data, image.width, image.height, 2);
UnloadImage(image); // Unloads dataGrayAlpha
font.baseSize = fontSize;
font.charsCount = charsCount;
font.chars = (CharInfo *)malloc(font.charsCount*sizeof(CharInfo));
for (int i = 0; i < font.charsCount; i++)
{
font.chars[i].value = fontChars[i];
font.chars[i].rec.x = (int)charData[i].x0;
font.chars[i].rec.y = (int)charData[i].y0;
font.chars[i].rec.width = (int)charData[i].x1 - (int)charData[i].x0;
font.chars[i].rec.height = (int)charData[i].y1 - (int)charData[i].y0;
font.chars[i].offsetX = charData[i].xoff;
font.chars[i].offsetY = baseline + charData[i].yoff;
font.chars[i].advanceX = (int)charData[i].xadvance;
}
free(charData);
return font;
}
#endif
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