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https://github.com/Orama-Interactive/Pixelorama.git
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a8c41312f8
It's not working perfectly yet so it's possible it may get unexposed in the stable version if many issues are found, especially if it causes regressions to selection moving & resizing. Needs testing.
70 lines
2.6 KiB
GDScript
70 lines
2.6 KiB
GDScript
class_name ShaderImageEffect
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extends RefCounted
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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(
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img: Image, shader: Shader, params: Dictionary, size: Vector2i, respect_indexed := true
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) -> void:
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# duplicate shader before modifying code to avoid affecting original resource
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var resized_width := false
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var resized_height := false
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if size.x == 1:
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size.x = 2
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img.crop(2, img.get_height())
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resized_width = true
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if size.y == 1:
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size.y = 2
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img.crop(img.get_width(), 2)
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resized_height = true
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shader = shader.duplicate()
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shader.code = shader.code.replace("unshaded", "unshaded, blend_premul_alpha")
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var vp := RenderingServer.viewport_create()
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var canvas := RenderingServer.canvas_create()
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RenderingServer.viewport_attach_canvas(vp, canvas)
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RenderingServer.viewport_set_size(vp, size.x, size.y)
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RenderingServer.viewport_set_disable_3d(vp, true)
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RenderingServer.viewport_set_active(vp, true)
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RenderingServer.viewport_set_transparent_background(vp, true)
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RenderingServer.viewport_set_default_canvas_item_texture_filter(
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vp, RenderingServer.CANVAS_ITEM_TEXTURE_FILTER_NEAREST
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)
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var ci_rid := RenderingServer.canvas_item_create()
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RenderingServer.viewport_set_canvas_transform(vp, canvas, Transform3D())
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RenderingServer.canvas_item_set_parent(ci_rid, canvas)
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var texture := RenderingServer.texture_2d_create(img)
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RenderingServer.canvas_item_add_texture_rect(ci_rid, Rect2(Vector2.ZERO, size), texture)
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var mat_rid := RenderingServer.material_create()
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RenderingServer.material_set_shader(mat_rid, shader.get_rid())
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RenderingServer.canvas_item_set_material(ci_rid, mat_rid)
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for key in params:
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var param = params[key]
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if param is Texture2D or param is Texture2DArray:
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RenderingServer.material_set_param(mat_rid, key, [param])
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else:
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RenderingServer.material_set_param(mat_rid, key, param)
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RenderingServer.viewport_set_update_mode(vp, RenderingServer.VIEWPORT_UPDATE_ONCE)
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RenderingServer.force_draw(false)
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var viewport_texture := RenderingServer.texture_2d_get(RenderingServer.viewport_get_texture(vp))
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RenderingServer.free_rid(vp)
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RenderingServer.free_rid(canvas)
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RenderingServer.free_rid(ci_rid)
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RenderingServer.free_rid(mat_rid)
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RenderingServer.free_rid(texture)
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if not is_instance_valid(viewport_texture): # Very rare bug
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done.emit()
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return
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viewport_texture.convert(img.get_format())
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img.copy_from(viewport_texture)
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if resized_width:
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img.crop(img.get_width() - 1, img.get_height())
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if resized_height:
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img.crop(img.get_width(), img.get_height() - 1)
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if img is ImageExtended and respect_indexed:
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img.convert_rgb_to_indexed()
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done.emit()
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