Add some tests for Image()

scripts/image.lua

@@ -0,0 +1,53 @@
+-- Copyright (C) 2018  David Capello
+--
+-- This file is released under the terms of the MIT license.
+-- Read LICENSE.txt for more information.
+
+local a = Image(32, 64)
+assert(a.width == 32)
+assert(a.height == 64)
+assert(a.colorMode == ColorMode.RGB) -- RGB by default
+
+local b = Image(32, 64, ColorMode.INDEXED)
+assert(b.width == 32)
+assert(b.height == 64)
+assert(b.colorMode == ColorMode.INDEXED)
+
+-- Get/put RGBA pixels
+local pc = app.pixelColor
+for y=0,a.height-1 do
+   for x=0,a.width-1 do
+      a:putPixel(x, y, pc.rgba(x, y, x+y, x-y))
+   end
+end
+
+-- Clone
+local c = a:clone()
+assert(c.width == 32)
+assert(c.height == 64)
+assert(c.colorMode == ColorMode.RGB)
+
+-- Get RGB pixels
+for y=0,c.height-1 do
+   for x=0,c.width-1 do
+      assert(c:getPixel(x, y) == pc.rgba(x, y, x+y, x-y))
+   end
+end
+
+-- Patch
+local pc = app.pixelColor
+local spr = Sprite(256, 256)
+local image = app.site.image
+local copy = image:clone()
+assert(image:getPixel(0, 0) == 0)
+for y=0,copy.height-1 do
+   for x=0,copy.width-1 do
+      copy:putPixel(x, y, pc.rgba(255-x, 255-y, 0, 255))
+   end
+end
+image:putImage(copy)
+assert(image:getPixel(0, 0) == pc.rgba(255, 255, 0, 255))
+assert(image:getPixel(255, 255) == pc.rgba(0, 0, 0, 255))
+app.undo()
+assert(image:getPixel(0, 0) == pc.rgba(0, 0, 0, 0))
+assert(image:getPixel(255, 255) == pc.rgba(0, 0, 0, 0))