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134 lines
5.6 KiB
Lua
134 lines
5.6 KiB
Lua
-------------------------------------------------------------------------------------------
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--
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-- raylib [textures] example - Image processing
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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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-------------------------------------------------------------------------------------------
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--#include <stdlib.h> -- Required for: free()
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NUM_PROCESSES = 8
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-- enum ImageProcess
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local COLOR_NONE = 1
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local COLOR_GRAYSCALE = 2
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local COLOR_TINT = 3
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local COLOR_INVERT = 4
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local COLOR_CONTRAST = 5
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local COLOR_BRIGHTNESS = 6
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local FLIP_VERTICAL = 7
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local FLIP_HORIZONTAL = 8
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local processText = {
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"NO PROCESSING",
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"COLOR GRAYSCALE",
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"COLOR TINT",
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"COLOR INVERT",
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"COLOR CONTRAST",
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"COLOR BRIGHTNESS",
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"FLIP VERTICAL",
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"FLIP HORIZONTAL"
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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 [textures] example - image processing")
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-- NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
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local image = LoadImage("resources/parrots.png") -- Loaded in CPU memory (RAM)
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image = ImageFormat(image, TextureFormat.UNCOMPRESSED_R8G8B8A8) -- Format image to RGBA 32bit (required for texture update)
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local texture = LoadTextureFromImage(image) -- Image converted to texture, GPU memory (VRAM)
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local currentProcess = COLOR_NONE
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local textureReload = false
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local selectRecs = {}
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for i = 1, NUM_PROCESSES do selectRecs[i] = Rectangle(40, 50 + 32*i, 150, 30) end
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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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if (IsKeyPressed(KEY.DOWN)) then
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currentProcess = currentProcess + 1
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if (currentProcess > NUM_PROCESSES) then currentProcess = 1 end
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textureReload = true
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elseif (IsKeyPressed(KEY.UP)) then
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currentProcess = currentProcess - 1
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if (currentProcess < 1) then currentProcess = NUM_PROCESSES end
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textureReload = true
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end
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if (textureReload) then
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UnloadImage(image) -- Unload current image data
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image = LoadImage("resources/parrots.png") -- Re-load image data
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-- NOTE: Image processing is a costly CPU process to be done every frame,
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-- If image processing is required in a frame-basis, it should be done
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-- with a texture and by shaders
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if (currentProcess == COLOR_GRAYSCALE) then image = ImageColorGrayscale(image)
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elseif (currentProcess == COLOR_TINT) then image = ImageColorTint(image, GREEN)
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elseif (currentProcess == COLOR_INVERT) then image = ImageColorInvert(image)
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elseif (currentProcess == COLOR_CONTRAST) then image = ImageColorContrast(image, -40)
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elseif (currentProcess == COLOR_BRIGHTNESS) then image = ImageColorBrightness(image, -80)
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elseif (currentProcess == FLIP_VERTICAL) then image = ImageFlipVertical(image)
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elseif (currentProcess == FLIP_HORIZONTAL) then image = ImageFlipHorizontal(image)
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end
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local pixels = {}
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pixels = GetImageData(image) -- Get pixel data from image (RGBA 32bit)
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texture = UpdateTexture(texture, pixels) -- Update texture with new image data
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textureReload = false
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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("IMAGE PROCESSING:", 40, 30, 10, DARKGRAY)
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-- Draw rectangles
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for i = 1, NUM_PROCESSES do
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if (i == currentProcess) then
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DrawRectangleRec(selectRecs[i], SKYBLUE)
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DrawRectangleLines(selectRecs[i].x, selectRecs[i].y, selectRecs[i].width, selectRecs[i].height, BLUE)
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DrawText(processText[i], selectRecs[i].x + selectRecs[i].width/2 - MeasureText(processText[i], 10)//2, selectRecs[i].y + 11, 10, DARKBLUE)
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else
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DrawRectangleRec(selectRecs[i], LIGHTGRAY)
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DrawRectangleLines(selectRecs[i].x, selectRecs[i].y, selectRecs[i].width, selectRecs[i].height, GRAY)
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DrawText(processText[i], selectRecs[i].x + selectRecs[i].width/2 - MeasureText(processText[i], 10)//2, selectRecs[i].y + 11, 10, DARKGRAY)
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end
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end
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DrawTexture(texture, screenWidth - texture.width - 60, screenHeight/2 - texture.height/2, WHITE)
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DrawRectangleLines(screenWidth - texture.width - 60, screenHeight/2 - texture.height/2, texture.width, texture.height, BLACK)
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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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UnloadTexture(texture) -- Unload texture from VRAM
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UnloadImage(image) -- Unload image from RAM
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CloseWindow() -- Close window and OpenGL context
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------------------------------------------------------------------------------------------- |