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