118 lines
4.8 KiB
Lua
118 lines
4.8 KiB
Lua
-------------------------------------------------------------------------------------------
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--
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-- raylib [text] example - TTF loading and usage
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--
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-- This example has been created using raylib 1.6 (www.raylib.com)
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-- raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
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--
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-- Copyright (c) 2014-2016 Ramon Santamaria (@raysan5)
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--
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-------------------------------------------------------------------------------------------
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-- Initialization
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-------------------------------------------------------------------------------------------
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local screenWidth = 800;
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local screenHeight = 450;
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InitWindow(screenWidth, screenHeight, "raylib [text] example - ttf loading")
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local msg = "TTF SpriteFont"
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-- NOTE: Textures/Fonts MUST be loaded after Window initialization (OpenGL context is required)
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-- TTF SpriteFont loading with custom generation parameters
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local font = LoadSpriteFontTTF("resources/fonts/KAISG.ttf", 96, 0, 0)
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-- Generate mipmap levels to use trilinear filtering
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-- NOTE: On 2D drawing it won't be noticeable, it looks like FILTER_BILINEAR
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--font.texture = GenTextureMipmaps(font.texture) -- ISSUE: attempt to index a SpriteFont value (local 'font')
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local fontSize = font.size
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local fontPosition = Vector2(40, screenHeight/2 + 50)
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local textSize
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SetTextureFilter(font.texture, TextureFilter.POINT)
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local currentFontFilter = 0 -- Default: FILTER_POINT
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local count = 0
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local droppedFiles
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SetTargetFPS(60)
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-------------------------------------------------------------------------------------------
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-- Main game loop
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while not WindowShouldClose() do -- Detect window close button or ESC key
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-- Update
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---------------------------------------------------------------------------------------
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fontSize = fontSize + GetMouseWheelMove()*4.0
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-- Choose font texture filter method
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if (IsKeyPressed(KEY.ONE)) then
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SetTextureFilter(font.texture, TextureFilter.POINT)
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currentFontFilter = 0
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elseif (IsKeyPressed(KEY.TWO)) then
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SetTextureFilter(font.texture, TextureFilter.BILINEAR)
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currentFontFilter = 1
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elseif (IsKeyPressed(KEY.THREE)) then
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-- NOTE: Trilinear filter won't be noticed on 2D drawing
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SetTextureFilter(font.texture, TextureFilter.TRILINEAR)
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currentFontFilter = 2
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end
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textSize = MeasureTextEx(font, msg, fontSize, 0)
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if (IsKeyDown(KEY.LEFT)) then fontPosition.x = fontPosition.x - 10
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elseif (IsKeyDown(KEY.RIGHT)) then fontPosition.x = fontPosition.x + 10
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end
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-- Load a dropped TTF file dynamically (at current fontSize)
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if (IsFileDropped()) then
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droppedFiles = GetDroppedFiles()
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count = #droppedFiles
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if (count == 1) then -- Only support one ttf file dropped
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UnloadSpriteFont(font)
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font = LoadSpriteFontTTF(droppedFiles[1], fontSize, 0, 0)
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ClearDroppedFiles()
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end
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end
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---------------------------------------------------------------------------------------
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-- Draw
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---------------------------------------------------------------------------------------
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BeginDrawing()
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ClearBackground(RAYWHITE)
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DrawText("Use mouse wheel to change font size", 20, 20, 10, GRAY)
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DrawText("Use KEY_RIGHT and KEY_LEFT to move text", 20, 40, 10, GRAY)
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DrawText("Use 1, 2, 3 to change texture filter", 20, 60, 10, GRAY)
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DrawText("Drop a new TTF font for dynamic loading", 20, 80, 10, DARKGRAY)
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DrawTextEx(font, msg, fontPosition, fontSize, 0, BLACK)
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-- TODO: It seems texSize measurement is not accurate due to chars offsets...
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--DrawRectangleLines(fontPosition.x, fontPosition.y, textSize.x, textSize.y, RED)
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DrawRectangle(0, screenHeight - 80, screenWidth, 80, LIGHTGRAY)
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DrawText(string.format("Font size: %02.02f", fontSize), 20, screenHeight - 50, 10, DARKGRAY)
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DrawText(string.format("Text size: [%02.02f, %02.02f]", textSize.x, textSize.y), 20, screenHeight - 30, 10, DARKGRAY)
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DrawText("CURRENT TEXTURE FILTER:", 250, 400, 20, GRAY)
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if (currentFontFilter == 0) then DrawText("POINT", 570, 400, 20, BLACK)
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elseif (currentFontFilter == 1) then DrawText("BILINEAR", 570, 400, 20, BLACK)
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elseif (currentFontFilter == 2) then DrawText("TRILINEAR", 570, 400, 20, BLACK)
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end
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EndDrawing()
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---------------------------------------------------------------------------------------
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end
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-- De-Initialization
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-------------------------------------------------------------------------------------------
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UnloadSpriteFont(font) -- SpriteFont unloading
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ClearDroppedFiles() -- Clear internal buffers
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CloseWindow() -- Close window and OpenGL context
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