Update gdgifexporter (#299)

addons/README.md

@@ -3,7 +3,7 @@
 ## gdgifexporter
 
 - Upstream: https://github.com/jegor377/godot-gdgifexporter
-- Version: git (9cdc448922717f069dd12e0377c1d9fc09d30f9f, 2020)
+- Version: git (201123154acfb9a1e00149fa708b4f13645d88dc, 2020)
 - License: MIT
 
 Files extracted from source:

addons/gdgifexporter/converter.gd

@@ -1,7 +1,20 @@
 extends Node
 
 
-func setup(image: Image, colors: Array) -> PoolByteArray:
+var _shader: Shader
+
+
+func get_indexed_datas(image: Image, colors: Array) -> PoolByteArray:
+	_shader = preload("./lookup_color.shader")
+	return _convert(image, colors)
+
+
+func get_similar_indexed_datas(image: Image, colors: Array) -> PoolByteArray:
+	_shader = preload("./lookup_similar.shader")
+	return _convert(image, colors)
+
+
+func _convert(image: Image, colors: Array) -> PoolByteArray:
 	var vp = VisualServer.viewport_create()
 	var canvas = VisualServer.canvas_create()
 	VisualServer.viewport_attach_canvas(vp, canvas)
@@ -18,13 +31,13 @@ func setup(image: Image, colors: Array) -> PoolByteArray:
 	texture.create_from_image(image)
 	VisualServer.canvas_item_add_texture_rect(ci_rid, Rect2(Vector2(0, 0), image.get_size()), texture)
 
-	var shader = preload("./lookup_similar.shader")
 	var mat_rid = VisualServer.material_create()
-	VisualServer.material_set_shader(mat_rid, shader.get_rid())
+	VisualServer.material_set_shader(mat_rid, _shader.get_rid())
 	var lut = Image.new()
 	lut.create(256, 1, false, Image.FORMAT_RGB8)
+	lut.fill(Color8(colors[0][0], colors[0][1], colors[0][2]))
 	lut.lock()
-	for i in 256:
+	for i in colors.size():
 		lut.set_pixel(i, 0, Color8(colors[i][0], colors[i][1], colors[i][2]))
 	var lut_tex = ImageTexture.new()
 	lut_tex.create_from_image(lut)
@@ -35,5 +48,11 @@ func setup(image: Image, colors: Array) -> PoolByteArray:
 	VisualServer.viewport_set_vflip(vp, true)
 	VisualServer.force_draw(false)
 	image = VisualServer.texture_get_data(VisualServer.viewport_get_texture(vp))
+
+	VisualServer.free_rid(vp)
+	VisualServer.free_rid(canvas)
+	VisualServer.free_rid(ci_rid)
+	VisualServer.free_rid(mat_rid)
+
 	image.convert(Image.FORMAT_R8)
 	return image.get_data()

addons/gdgifexporter/gif-lzw/lsbbitpacker.gd

@@ -3,28 +3,21 @@ extends Node
 
 class LSB_LZWBitPacker:
 	var bit_index: int = 0
-	var byte: int = 0
+	var stream: int = 0
 
 	var chunks: PoolByteArray = PoolByteArray([])
 
-	func get_bit(value: int, index: int) -> int:
-		return (value >> index) & 1
-
-	func set_bit(value: int, index: int) -> int:
-		return value | (1 << index)
-
 	func put_byte():
-		chunks.append(byte)
-		bit_index = 0
-		byte = 0
+		chunks.append(stream & 0xff)
+		bit_index -= 8
+		stream >>= 8
 
 	func write_bits(value: int, bits_count: int) -> void:
-		for i in range(bits_count):
-			if self.get_bit(value, i) == 1:
-				byte = self.set_bit(byte, bit_index)
-
-			bit_index += 1
-			if bit_index == 8:
+		value &= (1 << bits_count) - 1
+		value <<= bit_index
+		stream |= value
+		bit_index += bits_count
+		while bit_index >= 8:
 			self.put_byte()
 
 	func pack() -> PoolByteArray:
@@ -34,5 +27,5 @@ class LSB_LZWBitPacker:
 
 	func reset() -> void:
 		bit_index = 0
-		byte = 0
+		stream = 0
 		chunks = PoolByteArray([])

addons/gdgifexporter/lookup_color.shader

@@ -0,0 +1,19 @@
+shader_type canvas_item;
+render_mode unshaded;
+
+uniform sampler2D lut;
+
+void fragment() {
+	vec4 color = texture(TEXTURE, UV);
+	float index = 0.0;
+	if (color.a > 0.0) {
+		for (int i = 0; i < 256; i++) {
+			vec4 c = texture(lut, vec2((float(i) + 0.5) / 256.0, 0.5));
+			if (c.rgb == color.rgb) {
+				index = float(i) / 255.0;
+				break;
+			}
+		}
+	}
+	COLOR = vec4(vec3(index), 1.0);
+}

addons/gdgifexporter/quantization/median_cut.gd

@@ -144,5 +144,5 @@ func quantize_and_convert_to_codes(image: Image) -> Array:
 	if transparency:
 		color_array.push_front([0, 0, 0])
 
-	var data: PoolByteArray = converter.setup(image, color_array)
+	var data: PoolByteArray = converter.get_similar_indexed_datas(image, color_array)
 	return [data, color_array, transparency]