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/*******************************************************************************************
*
* raylib [text] example - TTF loading and usage
*
* This example has been created using raylib 1.3.0 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
* Copyright (c) 2015 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#include "raylib.h"
#if defined(PLATFORM_WEB)
#include <emscripten/emscripten.h>
#endif
#if defined(PLATFORM_DESKTOP)
#define GLSL_VERSION 330
#else // PLATFORM_RPI, PLATFORM_ANDROID, PLATFORM_WEB
#define GLSL_VERSION 100
#endif
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
const char msg[50] = "Signed Distance Fields";
// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
Font fontDefault = { 0 };
Font fontSDF = { 0 };
Shader shader = { 0 };
Vector2 fontPosition = { 0.0f };
Vector2 textSize = { 0.0f };
float fontSize = 16.0f;
int currentFont = 0; // 0 - fontDefault, 1 - fontSDF
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void); // Update and Draw one frame
//----------------------------------------------------------------------------------
// Program Main Entry Point
//----------------------------------------------------------------------------------
int main(void)
{
// Initialization
//--------------------------------------------------------------------------------------
InitWindow(screenWidth, screenHeight, "raylib [text] example - SDF fonts");
// NOTE: Textures/Fonts MUST be loaded after Window initialization (OpenGL context is required)
// Default font generation from TTF font
fontDefault.baseSize = 16;
fontDefault.charsCount = 95;
// Parameters > font size: 16, no chars array provided (0), chars count: 95 (autogenerate chars array)
fontDefault.chars = LoadFontData("resources/AnonymousPro-Bold.ttf", 16, 0, 95, FONT_DEFAULT);
// Parameters > chars count: 95, font size: 16, chars padding in image: 4 px, pack method: 0 (default)
Image atlas = GenImageFontAtlas(fontDefault.chars, &fontDefault.recs, 95, 16, 4, 0);
fontDefault.texture = LoadTextureFromImage(atlas);
UnloadImage(atlas);
// SDF font generation from TTF font
fontSDF.baseSize = 16;
fontSDF.charsCount = 95;
// Parameters > font size: 16, no chars array provided (0), chars count: 0 (defaults to 95)
fontSDF.chars = LoadFontData("resources/AnonymousPro-Bold.ttf", 16, 0, 0, FONT_SDF);
// Parameters > chars count: 95, font size: 16, chars padding in image: 0 px, pack method: 1 (Skyline algorythm)
atlas = GenImageFontAtlas(fontSDF.chars, &fontSDF.recs, 95, 16, 0, 1);
fontSDF.texture = LoadTextureFromImage(atlas);
UnloadImage(atlas);
// Load SDF required shader (we use default vertex shader)
shader = LoadShader(0, FormatText("resources/shaders/glsl%i/sdf.fs", GLSL_VERSION));
SetTextureFilter(fontSDF.texture, FILTER_BILINEAR); // Required for SDF font
fontPosition = (Vector2){ 40, screenHeight/2 - 50 };
#if defined(PLATFORM_WEB)
emscripten_set_main_loop(UpdateDrawFrame, 0, 1);
#else
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
UpdateDrawFrame();
}
#endif
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadFont(fontDefault); // Default font unloading
UnloadFont(fontSDF); // SDF font unloading
UnloadShader(shader); // Unload SDF shader
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void)
{
// Update
//----------------------------------------------------------------------------------
fontSize += GetMouseWheelMove()*8.0f;
if (fontSize < 6) fontSize = 6;
if (IsKeyDown(KEY_SPACE)) currentFont = 1;
else currentFont = 0;
if (currentFont == 0) textSize = MeasureTextEx(fontDefault, msg, fontSize, 0);
else textSize = MeasureTextEx(fontSDF, msg, fontSize, 0);
fontPosition.x = GetScreenWidth()/2 - textSize.x/2;
fontPosition.y = GetScreenHeight()/2 - textSize.y/2 + 80;
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
if (currentFont == 1)
{
// NOTE: SDF fonts require a custom SDf shader to compute fragment color
BeginShaderMode(shader); // Activate SDF font shader
DrawTextEx(fontSDF, msg, fontPosition, fontSize, 0, BLACK);
EndShaderMode(); // Activate our default shader for next drawings
DrawTexture(fontSDF.texture, 10, 10, BLACK);
}
else
{
DrawTextEx(fontDefault, msg, fontPosition, fontSize, 0, BLACK);
DrawTexture(fontDefault.texture, 10, 10, BLACK);
}
if (currentFont == 1) DrawText("SDF!", 320, 20, 80, RED);
else DrawText("default font", 315, 40, 30, GRAY);
DrawText("FONT SIZE: 16.0", GetScreenWidth() - 240, 20, 20, DARKGRAY);
DrawText(FormatText("RENDER SIZE: %02.02f", fontSize), GetScreenWidth() - 240, 50, 20, DARKGRAY);
DrawText("Use MOUSE WHEEL to SCALE TEXT!", GetScreenWidth() - 240, 90, 10, DARKGRAY);
DrawText("HOLD SPACE to USE SDF FONT VERSION!", 340, GetScreenHeight() - 30, 20, MAROON);
EndDrawing();
//----------------------------------------------------------------------------------
}
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