added blend modes

ui_scenes/selectedSprite/opacity_blend.gdshader

@@ -0,0 +1,122 @@
+shader_type canvas_item;
+
+uniform float opacity : hint_range(0.0, 1.0) = 1.0;
+uniform int blend_mode : hint_range(0, 11) = 0;
+
+// Blend mode constants:
+// 0: Normal
+// 1: Multiply
+// 2: Screen
+// 3: Overlay
+// 4: Soft Light
+// 5: Hard Light
+// 6: Color Dodge
+// 7: Color Burn
+// 8: Darken
+// 9: Lighten
+// 10: Add (Linear Dodge)
+// 11: Subtract
+
+vec3 multiply_blend(vec3 base, vec3 overlay) {
+	return base * overlay;
+}
+
+vec3 screen_blend(vec3 base, vec3 overlay) {
+	return 1.0 - (1.0 - base) * (1.0 - overlay);
+}
+
+vec3 overlay_blend(vec3 base, vec3 overlay) {
+	vec3 result;
+	result.r = base.r < 0.5 ? 2.0 * base.r * overlay.r : 1.0 - 2.0 * (1.0 - base.r) * (1.0 - overlay.r);
+	result.g = base.g < 0.5 ? 2.0 * base.g * overlay.g : 1.0 - 2.0 * (1.0 - base.g) * (1.0 - overlay.g);
+	result.b = base.b < 0.5 ? 2.0 * base.b * overlay.b : 1.0 - 2.0 * (1.0 - base.b) * (1.0 - overlay.b);
+	return result;
+}
+
+vec3 soft_light_blend(vec3 base, vec3 overlay) {
+	vec3 result;
+	result.r = overlay.r < 0.5 ? 2.0 * base.r * overlay.r + base.r * base.r * (1.0 - 2.0 * overlay.r) : 
+		sqrt(base.r) * (2.0 * overlay.r - 1.0) + 2.0 * base.r * (1.0 - overlay.r);
+	result.g = overlay.g < 0.5 ? 2.0 * base.g * overlay.g + base.g * base.g * (1.0 - 2.0 * overlay.g) : 
+		sqrt(base.g) * (2.0 * overlay.g - 1.0) + 2.0 * base.g * (1.0 - overlay.g);
+	result.b = overlay.b < 0.5 ? 2.0 * base.b * overlay.b + base.b * base.b * (1.0 - 2.0 * overlay.b) : 
+		sqrt(base.b) * (2.0 * overlay.b - 1.0) + 2.0 * base.b * (1.0 - overlay.b);
+	return result;
+}
+
+vec3 hard_light_blend(vec3 base, vec3 overlay) {
+	vec3 result;
+	result.r = overlay.r < 0.5 ? 2.0 * base.r * overlay.r : 1.0 - 2.0 * (1.0 - base.r) * (1.0 - overlay.r);
+	result.g = overlay.g < 0.5 ? 2.0 * base.g * overlay.g : 1.0 - 2.0 * (1.0 - base.g) * (1.0 - overlay.g);
+	result.b = overlay.b < 0.5 ? 2.0 * base.b * overlay.b : 1.0 - 2.0 * (1.0 - base.b) * (1.0 - overlay.b);
+	return result;
+}
+
+vec3 color_dodge_blend(vec3 base, vec3 overlay) {
+	vec3 result;
+	result.r = overlay.r >= 1.0 ? 1.0 : min(1.0, base.r / (1.0 - overlay.r));
+	result.g = overlay.g >= 1.0 ? 1.0 : min(1.0, base.g / (1.0 - overlay.g));
+	result.b = overlay.b >= 1.0 ? 1.0 : min(1.0, base.b / (1.0 - overlay.b));
+	return result;
+}
+
+vec3 color_burn_blend(vec3 base, vec3 overlay) {
+	vec3 result;
+	result.r = overlay.r <= 0.0 ? 0.0 : max(0.0, 1.0 - (1.0 - base.r) / overlay.r);
+	result.g = overlay.g <= 0.0 ? 0.0 : max(0.0, 1.0 - (1.0 - base.g) / overlay.g);
+	result.b = overlay.b <= 0.0 ? 0.0 : max(0.0, 1.0 - (1.0 - base.b) / overlay.b);
+	return result;
+}
+
+vec3 darken_blend(vec3 base, vec3 overlay) {
+	return min(base, overlay);
+}
+
+vec3 lighten_blend(vec3 base, vec3 overlay) {
+	return max(base, overlay);
+}
+
+vec3 add_blend(vec3 base, vec3 overlay) {
+	return min(vec3(1.0), base + overlay);
+}
+
+vec3 subtract_blend(vec3 base, vec3 overlay) {
+	return max(vec3(0.0), base - overlay);
+}
+
+void fragment() {
+	vec4 tex_color = texture(TEXTURE, UV);
+	
+	// Apply blend mode (only to RGB, preserve alpha channel behavior)
+	vec3 final_color;
+	
+	if (blend_mode == 0) { // Normal
+		final_color = tex_color.rgb;
+	} else if (blend_mode == 1) { // Multiply
+		final_color = multiply_blend(vec3(1.0), tex_color.rgb);
+	} else if (blend_mode == 2) { // Screen
+		final_color = screen_blend(vec3(0.0), tex_color.rgb);
+	} else if (blend_mode == 3) { // Overlay
+		final_color = overlay_blend(vec3(0.5), tex_color.rgb);
+	} else if (blend_mode == 4) { // Soft Light
+		final_color = soft_light_blend(vec3(0.5), tex_color.rgb);
+	} else if (blend_mode == 5) { // Hard Light
+		final_color = hard_light_blend(vec3(0.5), tex_color.rgb);
+	} else if (blend_mode == 6) { // Color Dodge
+		final_color = color_dodge_blend(vec3(0.0), tex_color.rgb);
+	} else if (blend_mode == 7) { // Color Burn
+		final_color = color_burn_blend(vec3(1.0), tex_color.rgb);
+	} else if (blend_mode == 8) { // Darken
+		final_color = darken_blend(vec3(1.0), tex_color.rgb);
+	} else if (blend_mode == 9) { // Lighten
+		final_color = lighten_blend(vec3(0.0), tex_color.rgb);
+	} else if (blend_mode == 10) { // Add (Linear Dodge)
+		final_color = add_blend(vec3(0.0), tex_color.rgb);
+	} else if (blend_mode == 11) { // Subtract
+		final_color = subtract_blend(vec3(1.0), tex_color.rgb);
+	} else {
+		final_color = tex_color.rgb;
+	}
+	
+	COLOR = vec4(final_color, tex_color.a * opacity);
+}

ui_scenes/selectedSprite/opacity_blend.gdshader.uid

@@ -0,0 +1 @@
+uid://dy03x5g364v80

ui_scenes/selectedSprite/spriteObject.gd

@@ -28,7 +28,7 @@ var imageSize = Vector2.ZERO
 @onready var wob = $WobbleOrigin
 
 @onready var outlineScene = preload("res://ui_scenes/selectedSprite/outline.tscn")
-@onready var opacityShader = preload("res://ui_scenes/selectedSprite/opacity.gdshader")
+@onready var opacityBlendShader = preload("res://ui_scenes/selectedSprite/opacity_blend.gdshader")
 
 var opacityMaterial = null
 
@@ -90,6 +90,7 @@ var time = 0.0  # Time accumulator for physics calculations
 #Opacity
 var spriteOpacity = 1.0
 var affectChildrenOpacity = false
+var blendMode = 0  # Default to Normal blend mode
 
 #Vis toggle
 var toggle = "null"
@@ -517,14 +518,21 @@ func updateShaderOpacity():
 	var editorAlpha = sprite.modulate.a
 	var finalOpacity = totalOpacity * editorAlpha
 	
-	# Always apply the opacity shader to ensure it's loaded
+	# Always apply the opacity blend shader to ensure it's loaded
 	if opacityMaterial == null:
 		opacityMaterial = ShaderMaterial.new()
-		opacityMaterial.shader = opacityShader
+		opacityMaterial.shader = opacityBlendShader
 	
 	opacityMaterial.set_shader_parameter("opacity", finalOpacity)
+	opacityMaterial.set_shader_parameter("blend_mode", blendMode)
 	sprite.material = opacityMaterial
 
+## Update the blend mode and refresh the shader
+func updateBlendMode(newBlendMode: int):
+	if BlendModeManager.is_valid_blend_mode(newBlendMode):
+		blendMode = newBlendMode
+		updateShaderOpacity()  # Refresh shader with new blend mode
+
 func updateChildrenOpacityRecursively():
 	var linkedSprites = getAllLinkedSprites()
 	for child in linkedSprites: