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70 lines
3.4 KiB
70 lines
3.4 KiB
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--
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-- raylib [textures] example - Image loading and drawing on it
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--
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-- NOTE: Images are loaded in CPU memory (RAM) textures are loaded in GPU memory (VRAM)
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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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-- Initialization
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local screenWidth = 800
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local screenHeight = 450
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InitWindow(screenWidth, screenHeight, "raylib [textures] example - image drawing")
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-- NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
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local cat = LoadImage("resources/cat.png") -- Load image in CPU memory (RAM)
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cat = ImageCrop(cat, Rectangle(100, 10, 280, 380)) -- Crop an image piece
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cat = ImageFlipHorizontal(cat) -- Flip cropped image horizontally
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cat = ImageResize(cat, 150, 200) -- Resize flipped-cropped image
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local parrots = LoadImage("resources/parrots.png") -- Load image in CPU memory (RAM)
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-- Draw one image over the other with a scaling of 1.5f
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parrots = ImageDraw(parrots, cat, Rectangle(0, 0, cat.width, cat.height), Rectangle(30, 40, cat.width*1.5, cat.height*1.5))
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parrots = ImageCrop(parrots, Rectangle(0, 50, parrots.width, parrots.height - 100)) -- Crop resulting image
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UnloadImage(cat) -- Unload image from RAM
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local texture = LoadTextureFromImage(parrots) -- Image converted to texture, uploaded to GPU memory (VRAM)
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UnloadImage(parrots) -- Once image has been converted to texture and uploaded to VRAM, it can be unloaded from RAM
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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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-- TODO: Update your variables here
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-- Draw
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BeginDrawing()
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ClearBackground(RAYWHITE)
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DrawTexture(texture, screenWidth/2 - texture.width/2, screenHeight/2 - texture.height/2 - 40, WHITE)
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DrawRectangleLines(screenWidth/2 - texture.width/2, screenHeight/2 - texture.height/2 - 40, texture.width, texture.height, DARKGRAY)
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DrawText("We are drawing only one texture from various images composed!", 240, 350, 10, DARKGRAY)
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DrawText("Source images have been cropped, scaled, flipped and copied one over the other.", 190, 370, 10, DARKGRAY)
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EndDrawing()
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---------------------------------------------------------------------------------------
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end
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-- De-Initialization
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UnloadTexture(texture) -- Texture unloading
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CloseWindow() -- Close window and OpenGL context
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