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Diffstat (limited to 'deps/raylib/examples/text/text_font_sdf.c')
| -rw-r--r-- | deps/raylib/examples/text/text_font_sdf.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/deps/raylib/examples/text/text_font_sdf.c b/deps/raylib/examples/text/text_font_sdf.c new file mode 100644 index 0000000..9524574 --- /dev/null +++ b/deps/raylib/examples/text/text_font_sdf.c @@ -0,0 +1,146 @@ +/******************************************************************************************* +* +* raylib [text] example - Font SDF loading +* +* Example originally created with raylib 1.3, last time updated with raylib 4.0 +* +* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified, +* BSD-like license that allows static linking with closed source software +* +* Copyright (c) 2015-2024 Ramon Santamaria (@raysan5) +* +********************************************************************************************/ + +#include "raylib.h" + +#if defined(PLATFORM_DESKTOP) + #define GLSL_VERSION 330 +#else // PLATFORM_ANDROID, PLATFORM_WEB + #define GLSL_VERSION 100 +#endif + +#include <stdlib.h> + +//------------------------------------------------------------------------------------ +// Program main entry point +//------------------------------------------------------------------------------------ +int main(void) +{ + // Initialization + //-------------------------------------------------------------------------------------- + const int screenWidth = 800; + const int screenHeight = 450; + + InitWindow(screenWidth, screenHeight, "raylib [text] example - SDF fonts"); + + // NOTE: Textures/Fonts MUST be loaded after Window initialization (OpenGL context is required) + + const char msg[50] = "Signed Distance Fields"; + + // Loading file to memory + int fileSize = 0; + unsigned char *fileData = LoadFileData("resources/anonymous_pro_bold.ttf", &fileSize); + + // Default font generation from TTF font + Font fontDefault = { 0 }; + fontDefault.baseSize = 16; + fontDefault.glyphCount = 95; + + // Loading font data from memory data + // Parameters > font size: 16, no glyphs array provided (0), glyphs count: 95 (autogenerate chars array) + fontDefault.glyphs = LoadFontData(fileData, fileSize, 16, 0, 95, FONT_DEFAULT); + // Parameters > glyphs count: 95, font size: 16, glyphs padding in image: 4 px, pack method: 0 (default) + Image atlas = GenImageFontAtlas(fontDefault.glyphs, &fontDefault.recs, 95, 16, 4, 0); + fontDefault.texture = LoadTextureFromImage(atlas); + UnloadImage(atlas); + + // SDF font generation from TTF font + Font fontSDF = { 0 }; + fontSDF.baseSize = 16; + fontSDF.glyphCount = 95; + // Parameters > font size: 16, no glyphs array provided (0), glyphs count: 0 (defaults to 95) + fontSDF.glyphs = LoadFontData(fileData, fileSize, 16, 0, 0, FONT_SDF); + // Parameters > glyphs count: 95, font size: 16, glyphs padding in image: 0 px, pack method: 1 (Skyline algorythm) + atlas = GenImageFontAtlas(fontSDF.glyphs, &fontSDF.recs, 95, 16, 0, 1); + fontSDF.texture = LoadTextureFromImage(atlas); + UnloadImage(atlas); + + UnloadFileData(fileData); // Free memory from loaded file + + // Load SDF required shader (we use default vertex shader) + Shader shader = LoadShader(0, TextFormat("resources/shaders/glsl%i/sdf.fs", GLSL_VERSION)); + SetTextureFilter(fontSDF.texture, TEXTURE_FILTER_BILINEAR); // Required for SDF font + + Vector2 fontPosition = { 40, screenHeight/2.0f - 50 }; + Vector2 textSize = { 0.0f, 0.0f }; + float fontSize = 16.0f; + int currentFont = 0; // 0 - fontDefault, 1 - fontSDF + + SetTargetFPS(60); // Set our game to run at 60 frames-per-second + //-------------------------------------------------------------------------------------- + + // Main game loop + while (!WindowShouldClose()) // Detect window close button or ESC key + { + // 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(TextFormat("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(); + //---------------------------------------------------------------------------------- + } + + // 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; +}
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