Legacy GM afterimage blend mode [SOLVED]

[kaito]

i want to get whatever color is under my sprite
then add 24 to red component, 64 to green and 160 to blue
this is how it would look like

how can i do this?

EDIT: i guess since RGBA needs to be from 0.0 to 1.0 then 24/255 to R, 64/255 to G, 160/255 to B

 

[YellowAfterlife]

You could do without a shader entirely - use draw_set_blend_mode / gpu_set_blendmode with bm_add for additive blend, d3d_set_fog / gpu_set_fog with (true, <color>, 0, 0) to replace the sprite pixels with said color, then draw the sprite, then revert blend mode to bm_normal and fog to disabled.

 

[kaito]

@YellowAfterlife ty it works

draw_set_blend_mode(bm_add) d3d_set_fog(1,make_colour_rgb(24,64,160),0,0)
draw_sprite_ext(s_x,img,x,y,flip,1,0,-1,1)
draw_set_blend_mode(bm_normal) d3d_set_fog(0,0,0,0)