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raylib/src/text.c

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/**********************************************************************************************
*
* raylib.text
*
* Basic functions to load SpriteFonts and draw Text
*
* Copyright (c) 2014 Ramon Santamaria (Ray San - raysan@raysanweb.com)
*
* 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"
#include <stdlib.h> // Declares malloc() and free() for memory management
#include <string.h> // String management functions (just strlen() is used)
#include <stdarg.h> // Used for functions with variable number of parameters (FormatText())
#include <stdio.h> // Standard input / output lib
#include "utils.h" // Required for function GetExtension()
// Following libs are used on LoadTTF()
#define STB_TRUETYPE_IMPLEMENTATION
#define STB_RECT_PACK_IMPLEMENTATION
#include "stb_rect_pack.h"
#include "stb_truetype.h"
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
#define FONT_FIRST_CHAR 32
#define MAX_FONTCHARS 128
#define MAX_FORMATTEXT_LENGTH 64
#define BIT_CHECK(a,b) ((a) & (1<<(b)))
//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
// ...
//----------------------------------------------------------------------------------
// Global variables
//----------------------------------------------------------------------------------
static SpriteFont defaultFont; // Default font provided by raylib
// NOTE: defaultFont is loaded on InitWindow and disposed on CloseWindow [module: core]
//----------------------------------------------------------------------------------
// Other Modules Functions Declaration (required by text)
//----------------------------------------------------------------------------------
//...
//----------------------------------------------------------------------------------
// Module specific Functions Declaration
//----------------------------------------------------------------------------------
static bool PixelIsMagenta(Color p); // Check if a pixel is magenta
static int ParseImageData(Color *imgDataPixel, int imgWidth, int imgHeight, Character **charSet); // Parse image pixel data to obtain character set measures
static SpriteFont LoadRBMF(const char *fileName); // Load a rBMF font file (raylib BitMap Font)
static SpriteFont LoadTTF(const char *fileName, int fontSize); // Generate a sprite font image from TTF data (font size required)
extern void LoadDefaultFont(void);
extern void UnloadDefaultFont(void);
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
extern void LoadDefaultFont(void)
{
// 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.numChars = 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, 0x00000901, 0x00000000, 0x06000000, 0x24000000, 0x00000901, 0x00000000, 0x09108000,
0x24fa28a2, 0x00000901, 0x00000000, 0x013e0000, 0x2242252a, 0x00000952, 0x00000000, 0x038a8000, 0x2422222a, 0x00000929, 0x00000000, 0x010a8000,
0x2412252a, 0x00000901, 0x00000000, 0x010a8000, 0x24fbe8be, 0x00000901, 0x00000000, 0x0ebe8000, 0xac020000, 0x00000f01, 0x00000000, 0x00048000,
0x0003e000, 0x00000000, 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 = LoadImageFromData(imagePixels, imWidth, imHeight, UNCOMPRESSED_GRAY_ALPHA);
free(imagePixels);
defaultFont.texture = LoadTextureFromImage(image, false); // Convert loaded image to OpenGL texture
UnloadImage(image);
// Reconstruct charSet using charsWidth[], charsHeight, charsDivisor, numChars
//------------------------------------------------------------------------------
defaultFont.charSet = (Character *)malloc(defaultFont.numChars * sizeof(Character)); // Allocate space for our character data
// This memory should be freed at end! --> Done on CloseWindow()
int currentLine = 0;
int currentPosX = charsDivisor;
int testPosX = charsDivisor;
for (int i = 0; i < defaultFont.numChars; i++)
{
defaultFont.charSet[i].value = FONT_FIRST_CHAR + i; // First char is 32
defaultFont.charSet[i].x = currentPosX;
defaultFont.charSet[i].y = charsDivisor + currentLine * (charsHeight + charsDivisor);
defaultFont.charSet[i].w = charsWidth[i];
defaultFont.charSet[i].h = charsHeight;
testPosX += (defaultFont.charSet[i].w + charsDivisor);
if (testPosX >= defaultFont.texture.width)
{
currentLine++;
currentPosX = 2 * charsDivisor + charsWidth[i];
testPosX = currentPosX;
defaultFont.charSet[i].x = charsDivisor;
defaultFont.charSet[i].y = charsDivisor + currentLine * (charsHeight + charsDivisor);
}
else currentPosX = testPosX;
}
TraceLog(INFO, "[TEX ID %i] Default font loaded successfully", defaultFont.texture.id);
}
extern void UnloadDefaultFont(void)
{
UnloadTexture(defaultFont.texture);
free(defaultFont.charSet);
}
// Get the default font, useful to be used with extended parameters
SpriteFont GetDefaultFont()
{
return defaultFont;
}
// Load a SpriteFont image into GPU memory
SpriteFont LoadSpriteFont(const char *fileName)
{
SpriteFont spriteFont;
// Check file extension
if (strcmp(GetExtension(fileName),"rbmf") == 0) spriteFont = LoadRBMF(fileName);
else if (strcmp(GetExtension(fileName),"ttf") == 0) spriteFont = LoadTTF(fileName, 20);
else
{
Image image = LoadImage(fileName);
// At this point we have a data array...
Color *imagePixels = GetPixelData(image);
#if defined(PLATFORM_RPI) || defined(PLATFORM_WEB)
ConvertToPOT(&image, MAGENTA);
#endif
// Process bitmap Font pixel data to get measures (Character array)
// spriteFont.charSet data is filled inside the function and memory is allocated!
int numChars = ParseImageData(imagePixels, image.width, image.height, &spriteFont.charSet);
TraceLog(INFO, "[%s] SpriteFont data parsed correctly", fileName);
TraceLog(INFO, "[%s] SpriteFont num chars detected: %i", fileName, numChars);
spriteFont.numChars = numChars;
spriteFont.texture = LoadTextureFromImage(image, false); // Convert loaded image to OpenGL texture
free(imagePixels);
UnloadImage(image);
}
return spriteFont;
}
// Unload SpriteFont from GPU memory
void UnloadSpriteFont(SpriteFont spriteFont)
{
UnloadTexture(spriteFont.texture);
free(spriteFont.charSet);
}
// 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)
{
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(defaultFont, text, position, fontSize, spacing, color);
}
// Draw text using SpriteFont
// NOTE: If font size is lower than base size, base size is used
// NOTE: chars spacing is NOT proportional to fontSize
void DrawTextEx(SpriteFont spriteFont, const char *text, Vector2 position, int fontSize, int spacing, Color tint)
{
int length = strlen(text);
int offsetX = 0;
float scaleFactor;
unsigned char letter;
Character c;
//if (fontSize <= spriteFont.charSet[0].h) scaleFactor = 1.0f;
//else scaleFactor = (float)fontSize / spriteFont.charSet[0].h;
scaleFactor = (float)fontSize/spriteFont.charSet[0].h;
for(int i = 0; i < length; i++)
{
if ((unsigned char)text[i] == 0xc2)
{
letter = (unsigned char)text[i + 1];
c = spriteFont.charSet[letter - FONT_FIRST_CHAR];
i++;
}
else if ((unsigned char)text[i] == 0xc3)
{
letter = (unsigned char)text[i + 1];
c = spriteFont.charSet[letter - FONT_FIRST_CHAR + 64];
i++;
}
else c = spriteFont.charSet[(int)text[i] - FONT_FIRST_CHAR];
DrawTexturePro(spriteFont.texture, (Rectangle){ c.x, c.y, c.w, c.h }, (Rectangle){ position.x + offsetX, position.y, c.w*scaleFactor, c.h*scaleFactor} , (Vector2){ 0, 0 }, 0.0f, tint);
offsetX += (c.w*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;
}
// Measure string width for default font
int MeasureText(const char *text, int fontSize)
{
Vector2 vec;
int defaultFontSize = 10; // Default Font chars height in pixel
if (fontSize < defaultFontSize) fontSize = defaultFontSize;
int spacing = fontSize / defaultFontSize;
vec = MeasureTextEx(defaultFont, text, fontSize, spacing);
return (int)vec.x;
}
// Measure string size for SpriteFont
Vector2 MeasureTextEx(SpriteFont spriteFont, const char *text, int fontSize, int spacing)
{
int len = strlen(text);
int textWidth = 0;
float scaleFactor;
for (int i = 0; i < len; i++)
{
textWidth += spriteFont.charSet[(int)text[i] - FONT_FIRST_CHAR].w;
}
if (fontSize <= spriteFont.charSet[0].h) scaleFactor = 1.0f;
else scaleFactor = (float)fontSize / spriteFont.charSet[0].h;
Vector2 vec;
vec.x = (float)textWidth * scaleFactor + (len - 1) * spacing; // Adds chars spacing to measure
vec.y = (float)spriteFont.charSet[0].h * scaleFactor;
return vec;
}
// Returns the base size for a SpriteFont (chars height)
int GetFontBaseSize(SpriteFont spriteFont)
{
return spriteFont.charSet[0].h;
}
// Shows current FPS on top-left corner
// NOTE: Uses default font
void DrawFPS(int posX, int posY)
{
char buffer[20];
// NOTE: We are rendering fps every second for better viewing on high framerates
// TODO: Not working properly on ANDROID and RPI
static float fps = 0.0f;
static int counter = 0;
static int refreshRate = 20;
if (counter < refreshRate)
{
counter++;
}
else
{
fps = GetFPS();
refreshRate = fps;
counter = 0;
}
sprintf(buffer, "%2.0f FPS", fps);
DrawText(buffer, posX, posY, 20, LIME);
}
//----------------------------------------------------------------------------------
// Module specific Functions Definition
//----------------------------------------------------------------------------------
// Check if a pixel is magenta
static bool PixelIsMagenta(Color p)
{
return ((p.r == 255) && (p.g == 0) && (p.b == 255) && (p.a == 255));
}
// Parse image pixel data to obtain character set measures
static int ParseImageData(Color *imgDataPixel, int imgWidth, int imgHeight, Character **charSet)
{
int charSpacing = 0;
int lineSpacing = 0;
int x = 0;
int y = 0;
Character tempCharSet[MAX_FONTCHARS]; // We allocate a temporal array for charData, once we get the actual charNumber we copy data to a sized array.
for(y = 0; y < imgHeight; y++)
{
for(x = 0; x < imgWidth; x++)
{
if (!PixelIsMagenta(imgDataPixel[y*imgWidth + x])) break;
}
if (!PixelIsMagenta(imgDataPixel[y*imgWidth + x])) break;
}
charSpacing = x;
lineSpacing = y;
int charHeight = 0;
int j = 0;
while(!PixelIsMagenta(imgDataPixel[(lineSpacing + j)*imgWidth + charSpacing])) j++;
charHeight = j;
// Check array values to get characters: value, x, y, w, h
int index = 0;
int lineToRead = 0;
int xPosToRead = charSpacing;
while((lineSpacing + lineToRead * (charHeight + lineSpacing)) < imgHeight)
{
while((xPosToRead < imgWidth) &&
!PixelIsMagenta((imgDataPixel[(lineSpacing + (charHeight+lineSpacing)*lineToRead)*imgWidth + xPosToRead])))
{
tempCharSet[index].value = FONT_FIRST_CHAR + index;
tempCharSet[index].x = xPosToRead;
tempCharSet[index].y = lineSpacing + lineToRead * (charHeight + lineSpacing);
tempCharSet[index].h = charHeight;
int charWidth = 0;
while(!PixelIsMagenta(imgDataPixel[(lineSpacing + (charHeight+lineSpacing)*lineToRead)*imgWidth + xPosToRead + charWidth])) charWidth++;
tempCharSet[index].w = charWidth;
index++;
xPosToRead += (charWidth + charSpacing);
}
lineToRead++;
xPosToRead = charSpacing;
}
// We got tempCharSet populated with char data and the number of chars (index)
// Now we move temp data to real charSet (passed as parameter to the function)
(*charSet) = (Character *)malloc(index * sizeof(Character)); // BE CAREFUL! This memory should be freed!
for (int i = 0; i < index; i++) (*charSet)[i] = tempCharSet[i];
return index;
}
// Load a rBMF font file (raylib BitMap Font)
static SpriteFont LoadRBMF(const char *fileName)
{
// rBMF Info Header (16 bytes)
typedef struct {
char id[4]; // rBMF file identifier
char version; // rBMF file version
// 4 MSB --> main version
// 4 LSB --> subversion
char firstChar; // First character in the font
// NOTE: Depending on charDataType, it could be useless
short imgWidth; // Image width - always POT (power-of-two)
short imgHeight; // Image height - always POT (power-of-two)
short numChars; // Number of characters contained
short charHeight; // Characters height - the same for all characters
char compType; // Compression type:
// 4 MSB --> image data compression
// 4 LSB --> chars data compression
char charsDataType; // Char data type provided
} rbmfInfoHeader;
SpriteFont spriteFont;
rbmfInfoHeader rbmfHeader;
unsigned int *rbmfFileData = NULL;
unsigned char *rbmfCharWidthData = NULL;
int charsDivisor = 1; // Every char is separated from the consecutive by a 1 pixel divisor, horizontally and vertically
FILE *rbmfFile = fopen(fileName, "rb"); // Define a pointer to bitmap file and open it in read-binary mode
if (rbmfFile == NULL)
{
TraceLog(WARNING, "[%s] rBMF font file could not be opened", fileName);
}
else
{
fread(&rbmfHeader, sizeof(rbmfInfoHeader), 1, rbmfFile);
TraceLog(INFO, "[%s] Loading rBMF file, size: %ix%i, numChars: %i, charHeight: %i", fileName, rbmfHeader.imgWidth, rbmfHeader.imgHeight, rbmfHeader.numChars, rbmfHeader.charHeight);
spriteFont.numChars = (int)rbmfHeader.numChars;
int numPixelBits = rbmfHeader.imgWidth * rbmfHeader.imgHeight / 32;
rbmfFileData = (unsigned int *)malloc(numPixelBits * sizeof(unsigned int));
for(int i = 0; i < numPixelBits; i++) fread(&rbmfFileData[i], sizeof(unsigned int), 1, rbmfFile);
rbmfCharWidthData = (unsigned char *)malloc(spriteFont.numChars * sizeof(unsigned char));
for(int i = 0; i < spriteFont.numChars; i++) fread(&rbmfCharWidthData[i], sizeof(unsigned char), 1, rbmfFile);
// Re-construct image from rbmfFileData
//-----------------------------------------
Color *imagePixels = (Color *)malloc(rbmfHeader.imgWidth*rbmfHeader.imgHeight*sizeof(Color));
for (int i = 0; i < rbmfHeader.imgWidth*rbmfHeader.imgHeight; i++) imagePixels[i] = BLANK; // Initialize array
int counter = 0; // Font data elements counter
// Fill image data (convert from bit to pixel!)
for (int i = 0; i < rbmfHeader.imgWidth*rbmfHeader.imgHeight; i += 32)
{
for (int j = 31; j >= 0; j--)
{
if (BIT_CHECK(rbmfFileData[counter], j)) imagePixels[i+j] = WHITE;
}
counter++;
}
Image image = LoadImageFromData(imagePixels, rbmfHeader.imgWidth, rbmfHeader.imgHeight, UNCOMPRESSED_GRAY_ALPHA);
free(imagePixels);
TraceLog(INFO, "[%s] Image reconstructed correctly, now converting it to texture", fileName);
spriteFont.texture = LoadTextureFromImage(image, false);
UnloadImage(image); // Unload image data
//TraceLog(INFO, "[%s] Starting charSet reconstruction", fileName);
// Reconstruct charSet using rbmfCharWidthData, rbmfHeader.charHeight, charsDivisor, rbmfHeader.numChars
spriteFont.charSet = (Character *)malloc(spriteFont.numChars * sizeof(Character)); // Allocate space for our character data
int currentLine = 0;
int currentPosX = charsDivisor;
int testPosX = charsDivisor;
for (int i = 0; i < spriteFont.numChars; i++)
{
spriteFont.charSet[i].value = (int)rbmfHeader.firstChar + i;
spriteFont.charSet[i].x = currentPosX;
spriteFont.charSet[i].y = charsDivisor + currentLine * ((int)rbmfHeader.charHeight + charsDivisor);
spriteFont.charSet[i].w = (int)rbmfCharWidthData[i];
spriteFont.charSet[i].h = (int)rbmfHeader.charHeight;
testPosX += (spriteFont.charSet[i].w + charsDivisor);
if (testPosX > spriteFont.texture.width)
{
currentLine++;
currentPosX = 2 * charsDivisor + (int)rbmfCharWidthData[i];
testPosX = currentPosX;
spriteFont.charSet[i].x = charsDivisor;
spriteFont.charSet[i].y = charsDivisor + currentLine * (rbmfHeader.charHeight + charsDivisor);
}
else currentPosX = testPosX;
}
TraceLog(INFO, "[%s] rBMF file loaded correctly as SpriteFont", fileName);
}
fclose(rbmfFile);
free(rbmfFileData); // Now we can free loaded data from RAM memory
free(rbmfCharWidthData);
return spriteFont;
}
// Generate a sprite font from TTF data (font size required)
static SpriteFont LoadTTF(const char *fileName, int fontSize)
{
SpriteFont font;
Image image;
image.width = 512;
image.height = 512;
//image.pixels = (Color *)malloc(image.width*image.height*sizeof(Color));
unsigned char *ttfBuffer = (unsigned char *)malloc(1 << 25);
// TODO: Load TTF and generate bitmap font and chars data -> REVIEW!
stbtt_packedchar chardata[128]; // Num characters: 128 (?) -> REVIEW!
unsigned char *tempBitmap = (unsigned char *)malloc(image.width*image.height*sizeof(unsigned char)); // One channel bitmap returned!
// REFERENCE
/*
typedef struct
{
unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap
float xoff,yoff,xadvance;
float xoff2,yoff2;
} stbtt_packedchar;
*/
stbtt_pack_context pc;
FILE *ttfFile = fopen(fileName, "rb");
fread(ttfBuffer, 1, 1<<25, ttfFile);
stbtt_PackBegin(&pc, tempBitmap, image.width, image.height, 0, 1, NULL);
//stbtt_PackSetOversampling(&pc, 1, 1);
//stbtt_PackFontRange(&pc, ttfBuffer, 0, fontSize, 32, 95, chardata[0]+32);
stbtt_PackSetOversampling(&pc, 2, 2); // Better results
stbtt_PackFontRange(&pc, ttfBuffer, 0, fontSize, 32, 95, chardata + 32);
//stbtt_PackSetOversampling(&pc, 3, 1);
//stbtt_PackFontRange(&pc, ttfBuffer, 0, fontSize, 32, 95, chardata[2]+32);
stbtt_PackEnd(&pc);
free(ttfBuffer);
// Now we have image data in tempBitmap and chardata filled...
/*
for (int i = 0; i < 512*512; i++)
{
image.pixels[i].r = tempBitmap[i];
image.pixels[i].g = tempBitmap[i];
image.pixels[i].b = tempBitmap[i];
image.pixels[i].a = 255;
}
*/
free(tempBitmap);
// REFERENCE EXAMPLE
/*
//To draw, provide *text, posX, posY
//stbtt_aligned_quad letter;
//stbtt_GetPackedQuad(chardata[0], BITMAP_W, BITMAP_H, *text++, &posX, &posY, &letter, font ? 0 : integer_align);
void print(float x, float y, int fontNum, char *text)
{
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, font_tex);
glBegin(GL_QUADS);
while (*text) {
stbtt_aligned_quad q;
stbtt_GetPackedQuad(chardata[fontNum], BITMAP_W, BITMAP_H, *text++, &x, &y, &q, fontNum ? 0 : integer_align);
drawBoxTC(q.x0,q.y0,q.x1,q.y1, q.s0,q.t0,q.s1,q.t1);
}
glEnd();
}
print(100,160, 0, "This is a test");
*/
font.numChars = 95;
font.charSet = (Character *)malloc(font.numChars*sizeof(Character));
font.texture = LoadTextureFromImage(image, false);
//stbtt_aligned_quad letter;
//int x = 0, y = 0;
for (int i = 0; i < font.numChars; i++)
{
font.charSet[i].value = i + 32;
//stbtt_GetPackedQuad(chardata[0], 512, 512, i, &x, &y, &letter, 0);
font.charSet[i].x = chardata[i + 32].x0;
font.charSet[i].y = chardata[i + 32].y0;
font.charSet[i].w = chardata[i + 32].x1 - chardata[i + 32].x0;
font.charSet[i].h = chardata[i + 32].y1 - chardata[i + 32].y0;
}
UnloadImage(image);
return font;
}
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