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46 lines
1.8 KiB
GDScript
46 lines
1.8 KiB
GDScript
class_name ShaderImageEffect extends Reference
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# Helper class to generate image effects using shaders
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signal done
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func generate_image(_img : Image,_shaderpath: String, _params : Dictionary , size : Vector2 = Global.current_project.size):
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var shader = load(_shaderpath)
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_img.unlock()
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var viewport_texture := Image.new()
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var vp = VisualServer.viewport_create()
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var canvas = VisualServer.canvas_create()
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VisualServer.viewport_attach_canvas(vp, canvas)
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VisualServer.viewport_set_size(vp, size.x, size.y)
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VisualServer.viewport_set_disable_3d(vp, true)
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VisualServer.viewport_set_usage(vp, VisualServer.VIEWPORT_USAGE_2D)
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VisualServer.viewport_set_hdr(vp, true)
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VisualServer.viewport_set_active(vp, true)
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VisualServer.viewport_set_transparent_background(vp, true)
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var ci_rid = VisualServer.canvas_item_create()
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VisualServer.viewport_set_canvas_transform(vp, canvas, Transform())
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VisualServer.canvas_item_set_parent(ci_rid, canvas)
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var texture = ImageTexture.new()
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texture.create_from_image(_img)
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VisualServer.canvas_item_add_texture_rect(ci_rid, Rect2(Vector2(0, 0), size), texture)
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var mat_rid = VisualServer.material_create()
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VisualServer.material_set_shader(mat_rid, shader.get_rid())
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VisualServer.canvas_item_set_material(ci_rid, mat_rid)
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for key in _params:
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VisualServer.material_set_param(mat_rid, key, _params[key])
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VisualServer.viewport_set_update_mode(vp, VisualServer.VIEWPORT_UPDATE_ONCE)
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VisualServer.viewport_set_vflip(vp, true)
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VisualServer.force_draw(false)
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viewport_texture = VisualServer.texture_get_data(VisualServer.viewport_get_texture(vp))
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VisualServer.free_rid(vp)
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VisualServer.free_rid(canvas)
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VisualServer.free_rid(ci_rid)
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VisualServer.free_rid(mat_rid)
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viewport_texture.convert(Image.FORMAT_RGBA8)
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#Global.canvas.handle_undo("Draw")
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_img.copy_from(viewport_texture)
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#Global.canvas.handle_redo("Draw")
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_img.lock()
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emit_signal("done")
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