rendering fixes

scenes/main_render.gdshader

@@ -1,25 +1,25 @@
 shader_type canvas_item;
 
+uniform vec2 target_tex_size = vec2(1280,720);
+
 uniform float color_steps:hint_range(1.0, 255.0, 1.0);
-uniform float color_min:hint_range(0.0, 1.0, 0.01) = 0;
-uniform float color_max:hint_range(0.0, 1.0, 0.01) = 1;
 uniform sampler2D color_curve;
 
+
 void vertex() {
 	// Called for every vertex the material is visible on.
 }
 
 void fragment() {
-	vec2 texSize = vec2(textureSize(TEXTURE,0)); // For performance reasons, this function should be avoided as it always performs a full texture read. When possible, you should pass the texture size as a uniform instead.
-	texSize = texSize / 4.;
-	ivec2 intUv = ivec2(texSize * UV);
-	vec2 flooredUv = vec2(intUv) / texSize;
+	//vec2 texSize = vec2(textureSize(TEXTURE,0)); // For performance reasons, this function should be avoided as it always performs a full texture read. When possible, you should pass the texture size as a uniform instead.
+	//texSize = texSize / 4.;
+	ivec2 intUv = ivec2(target_tex_size * UV);
+	vec2 flooredUv = vec2(intUv) / target_tex_size;
 	vec3 fullColor = texture(TEXTURE,flooredUv).rgb;
-	//vec3 strechedColor = (fullColor - color_min) / color_max;
 	vec3 strechedColor = vec3(
 		texture(color_curve,vec2(fullColor.r,0)).r,
-		texture(color_curve,vec2(fullColor.g,0)).r,
-		texture(color_curve,vec2(fullColor.b,0)).r);
+		texture(color_curve,vec2(fullColor.g,0)).g,
+		texture(color_curve,vec2(fullColor.b,0)).b);
 	vec3 scaledColor = strechedColor * color_steps;
 	vec3 roundColor = round(scaledColor);
 	vec3 backScaledColor = roundColor / color_steps;