Reviewed some lua examples and added new ones

1 files changed, 118 insertions, 0 deletions

diff --git a/examples/text_ttf_loading.lua b/examples/text_ttf_loading.lua
new file mode 100644
index 00000000..26443212
--- /dev/null
+++ b/examples/text_ttf_loading.lua
@@ -0,0 +1,118 @@
+-------------------------------------------------------------------------------------------
+--
+--  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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