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Diffstat (limited to 'deps/raylib/examples/text/text_codepoints_loading.c')
| -rw-r--r-- | deps/raylib/examples/text/text_codepoints_loading.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/deps/raylib/examples/text/text_codepoints_loading.c b/deps/raylib/examples/text/text_codepoints_loading.c new file mode 100644 index 0000000..95a81df --- /dev/null +++ b/deps/raylib/examples/text/text_codepoints_loading.c @@ -0,0 +1,156 @@ +/******************************************************************************************* +* +* raylib [text] example - Codepoints loading +* +* Example originally created with raylib 4.2, last time updated with raylib 2.5 +* +* 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) 2022-2024 Ramon Santamaria (@raysan5) +* +********************************************************************************************/ + +#include "raylib.h" + +#include <stdlib.h> // Required for: calloc(), realloc(), free() +#include <string.h> // Required for: memcpy() + +// Text to be displayed, must be UTF-8 (save this code file as UTF-8) +// NOTE: It can contain all the required text for the game, +// this text will be scanned to get all the required codepoints +static char *text = "いろはにほへと ちりぬるを\nわかよたれそ つねならむ\nうゐのおくやま けふこえて\nあさきゆめみし ゑひもせす"; + +// Remove codepoint duplicates if requested +static int *CodepointRemoveDuplicates(int *codepoints, int codepointCount, int *codepointResultCount); + +//------------------------------------------------------------------------------------ +// Program main entry point +//------------------------------------------------------------------------------------ +int main(void) +{ + // Initialization + //-------------------------------------------------------------------------------------- + const int screenWidth = 800; + const int screenHeight = 450; + + InitWindow(screenWidth, screenHeight, "raylib [text] example - codepoints loading"); + + // Get codepoints from text + int codepointCount = 0; + int *codepoints = LoadCodepoints(text, &codepointCount); + + // Removed duplicate codepoints to generate smaller font atlas + int codepointsNoDupsCount = 0; + int *codepointsNoDups = CodepointRemoveDuplicates(codepoints, codepointCount, &codepointsNoDupsCount); + UnloadCodepoints(codepoints); + + // Load font containing all the provided codepoint glyphs + // A texture font atlas is automatically generated + Font font = LoadFontEx("resources/DotGothic16-Regular.ttf", 36, codepointsNoDups, codepointsNoDupsCount); + + // Set bilinear scale filter for better font scaling + SetTextureFilter(font.texture, TEXTURE_FILTER_BILINEAR); + + SetTextLineSpacing(20); // Set line spacing for multiline text (when line breaks are included '\n') + + // Free codepoints, atlas has already been generated + free(codepointsNoDups); + + bool showFontAtlas = false; + + int codepointSize = 0; + char *ptr = text; + + 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 + //---------------------------------------------------------------------------------- + if (IsKeyPressed(KEY_SPACE)) showFontAtlas = !showFontAtlas; + + // Testing code: getting next and previous codepoints on provided text + if (IsKeyPressed(KEY_RIGHT)) + { + // Get next codepoint in string and move pointer + GetCodepointNext(ptr, &codepointSize); + ptr += codepointSize; + } + else if (IsKeyPressed(KEY_LEFT)) + { + // Get previous codepoint in string and move pointer + GetCodepointPrevious(ptr, &codepointSize); + ptr -= codepointSize; + } + //---------------------------------------------------------------------------------- + + // Draw + //---------------------------------------------------------------------------------- + BeginDrawing(); + + ClearBackground(RAYWHITE); + + DrawRectangle(0, 0, GetScreenWidth(), 70, BLACK); + DrawText(TextFormat("Total codepoints contained in provided text: %i", codepointCount), 10, 10, 20, GREEN); + DrawText(TextFormat("Total codepoints required for font atlas (duplicates excluded): %i", codepointsNoDupsCount), 10, 40, 20, GREEN); + + if (showFontAtlas) + { + // Draw generated font texture atlas containing provided codepoints + DrawTexture(font.texture, 150, 100, BLACK); + DrawRectangleLines(150, 100, font.texture.width, font.texture.height, BLACK); + } + else + { + // Draw provided text with laoded font, containing all required codepoint glyphs + DrawTextEx(font, text, (Vector2) { 160, 110 }, 48, 5, BLACK); + } + + DrawText("Press SPACE to toggle font atlas view!", 10, GetScreenHeight() - 30, 20, GRAY); + + EndDrawing(); + //---------------------------------------------------------------------------------- + } + + // De-Initialization + //-------------------------------------------------------------------------------------- + UnloadFont(font); // Unload font + + CloseWindow(); // Close window and OpenGL context + //-------------------------------------------------------------------------------------- + + return 0; +} + +// Remove codepoint duplicates if requested +// WARNING: This process could be a bit slow if there text to process is very long +static int *CodepointRemoveDuplicates(int *codepoints, int codepointCount, int *codepointsResultCount) +{ + int codepointsNoDupsCount = codepointCount; + int *codepointsNoDups = (int *)calloc(codepointCount, sizeof(int)); + memcpy(codepointsNoDups, codepoints, codepointCount*sizeof(int)); + + // Remove duplicates + for (int i = 0; i < codepointsNoDupsCount; i++) + { + for (int j = i + 1; j < codepointsNoDupsCount; j++) + { + if (codepointsNoDups[i] == codepointsNoDups[j]) + { + for (int k = j; k < codepointsNoDupsCount; k++) codepointsNoDups[k] = codepointsNoDups[k + 1]; + + codepointsNoDupsCount--; + j--; + } + } + } + + // NOTE: The size of codepointsNoDups is the same as original array but + // only required positions are filled (codepointsNoDupsCount) + + *codepointsResultCount = codepointsNoDupsCount; + return codepointsNoDups; +}
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