1/*******************************************************************************************
2*
3* raylib [text] example - TTF loading and usage
4*
5* This example has been created using raylib 1.3.0 (www.raylib.com)
6* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
7*
8* Copyright (c) 2015 Ramon Santamaria (@raysan5)
9*
10********************************************************************************************/
11
12#include "raylib.h"
13
14#if defined(PLATFORM_DESKTOP)
15 #define GLSL_VERSION 330
16#else // PLATFORM_RPI, PLATFORM_ANDROID, PLATFORM_WEB
17 #define GLSL_VERSION 100
18#endif
19
20#include <stdlib.h>
21
22int main(void)
23{
24 // Initialization
25 //--------------------------------------------------------------------------------------
26 const int screenWidth = 800;
27 const int screenHeight = 450;
28
29 InitWindow(screenWidth, screenHeight, "raylib [text] example - SDF fonts");
30
31 // NOTE: Textures/Fonts MUST be loaded after Window initialization (OpenGL context is required)
32
33 const char msg[50] = "Signed Distance Fields";
34
35 // Default font generation from TTF font
36 Font fontDefault = { 0 };
37 fontDefault.baseSize = 16;
38 fontDefault.charsCount = 95;
39 // Parameters > font size: 16, no chars array provided (0), chars count: 95 (autogenerate chars array)
40 fontDefault.chars = LoadFontData("resources/AnonymousPro-Bold.ttf", 16, 0, 95, FONT_DEFAULT);
41 // Parameters > chars count: 95, font size: 16, chars padding in image: 4 px, pack method: 0 (default)
42 Image atlas = GenImageFontAtlas(fontDefault.chars, &fontDefault.recs, 95, 16, 4, 0);
43 fontDefault.texture = LoadTextureFromImage(atlas);
44 UnloadImage(atlas);
45
46 // SDF font generation from TTF font
47 Font fontSDF = { 0 };
48 fontSDF.baseSize = 16;
49 fontSDF.charsCount = 95;
50 // Parameters > font size: 16, no chars array provided (0), chars count: 0 (defaults to 95)
51 fontSDF.chars = LoadFontData("resources/AnonymousPro-Bold.ttf", 16, 0, 0, FONT_SDF);
52 // Parameters > chars count: 95, font size: 16, chars padding in image: 0 px, pack method: 1 (Skyline algorythm)
53 atlas = GenImageFontAtlas(fontSDF.chars, &fontSDF.recs, 95, 16, 0, 1);
54 fontSDF.texture = LoadTextureFromImage(atlas);
55 UnloadImage(atlas);
56
57 // Load SDF required shader (we use default vertex shader)
58 Shader shader = LoadShader(0, FormatText("resources/shaders/glsl%i/sdf.fs", GLSL_VERSION));
59 SetTextureFilter(fontSDF.texture, FILTER_BILINEAR); // Required for SDF font
60
61 Vector2 fontPosition = { 40, screenHeight/2 - 50 };
62 Vector2 textSize = { 0.0f, 0.0f };
63 float fontSize = 16.0f;
64 int currentFont = 0; // 0 - fontDefault, 1 - fontSDF
65
66 SetTargetFPS(60); // Set our game to run at 60 frames-per-second
67 //--------------------------------------------------------------------------------------
68
69 // Main game loop
70 while (!WindowShouldClose()) // Detect window close button or ESC key
71 {
72 // Update
73 //----------------------------------------------------------------------------------
74 fontSize += GetMouseWheelMove()*8.0f;
75
76 if (fontSize < 6) fontSize = 6;
77
78 if (IsKeyDown(KEY_SPACE)) currentFont = 1;
79 else currentFont = 0;
80
81 if (currentFont == 0) textSize = MeasureTextEx(fontDefault, msg, fontSize, 0);
82 else textSize = MeasureTextEx(fontSDF, msg, fontSize, 0);
83
84 fontPosition.x = GetScreenWidth()/2 - textSize.x/2;
85 fontPosition.y = GetScreenHeight()/2 - textSize.y/2 + 80;
86 //----------------------------------------------------------------------------------
87
88 // Draw
89 //----------------------------------------------------------------------------------
90 BeginDrawing();
91
92 ClearBackground(RAYWHITE);
93
94 if (currentFont == 1)
95 {
96 // NOTE: SDF fonts require a custom SDf shader to compute fragment color
97 BeginShaderMode(shader); // Activate SDF font shader
98 DrawTextEx(fontSDF, msg, fontPosition, fontSize, 0, BLACK);
99 EndShaderMode(); // Activate our default shader for next drawings
100
101 DrawTexture(fontSDF.texture, 10, 10, BLACK);
102 }
103 else
104 {
105 DrawTextEx(fontDefault, msg, fontPosition, fontSize, 0, BLACK);
106 DrawTexture(fontDefault.texture, 10, 10, BLACK);
107 }
108
109 if (currentFont == 1) DrawText("SDF!", 320, 20, 80, RED);
110 else DrawText("default font", 315, 40, 30, GRAY);
111
112 DrawText("FONT SIZE: 16.0", GetScreenWidth() - 240, 20, 20, DARKGRAY);
113 DrawText(FormatText("RENDER SIZE: %02.02f", fontSize), GetScreenWidth() - 240, 50, 20, DARKGRAY);
114 DrawText("Use MOUSE WHEEL to SCALE TEXT!", GetScreenWidth() - 240, 90, 10, DARKGRAY);
115
116 DrawText("HOLD SPACE to USE SDF FONT VERSION!", 340, GetScreenHeight() - 30, 20, MAROON);
117
118 EndDrawing();
119 //----------------------------------------------------------------------------------
120 }
121
122 // De-Initialization
123 //--------------------------------------------------------------------------------------
124 UnloadFont(fontDefault); // Default font unloading
125 UnloadFont(fontSDF); // SDF font unloading
126
127 UnloadShader(shader); // Unload SDF shader
128
129 CloseWindow(); // Close window and OpenGL context
130 //--------------------------------------------------------------------------------------
131
132 return 0;
133}