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January 27, 2026 06:43
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DragonRuby Game Toolkit - custom blend modes -> ring progress bar
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| BLENDOPERATION_ADD = 0x1 | |
| BLENDOPERATION_SUBTRACT = 0x2 | |
| BLENDOPERATION_REV_SUBTRACT = 0x3 | |
| BLENDOPERATION_MINIMUM = 0x4 | |
| BLENDOPERATION_MAXIMUM = 0x5 | |
| BLENDFACTOR_ZERO = 0x1 | |
| BLENDFACTOR_ONE = 0x2 | |
| BLENDFACTOR_SRC_COLOR = 0x3 | |
| BLENDFACTOR_ONE_MINUS_SRC_COLOR = 0x4 | |
| BLENDFACTOR_SRC_ALPHA = 0x5 | |
| BLENDFACTOR_ONE_MINUS_SRC_ALPHA = 0x6 | |
| BLENDFACTOR_DST_COLOR = 0x7 | |
| BLENDFACTOR_ONE_MINUS_DST_COLOR = 0x8 | |
| BLENDFACTOR_DST_ALPHA = 0x9 | |
| BLENDFACTOR_ONE_MINUS_DST_ALPHA = 0xA | |
| # color_out = color_src * src_color_factor [color_operation] color_dst * dst_color_factor | |
| # alpha_out = alpha_src * src_alpha_factor [alpha_operation] alpha_dst * dst_alpha_factor | |
| def compose_blendmode(src_color_factor, dst_color_factor, color_operation, src_alpha_factor, dst_alpha_factor, alpha_operation) | |
| (color_operation << 0) | | |
| (src_color_factor << 4) | | |
| (dst_color_factor << 8) | | |
| (alpha_operation << 16) | | |
| (src_alpha_factor << 20) | | |
| (dst_alpha_factor << 24) | |
| end | |
| HOLE_PUNCH_BLENDMODE = compose_blendmode(BLENDFACTOR_ZERO, | |
| BLENDFACTOR_ONE_MINUS_SRC_ALPHA, | |
| BLENDOPERATION_ADD, | |
| BLENDFACTOR_ZERO, | |
| BLENDFACTOR_ONE_MINUS_SRC_ALPHA, | |
| BLENDOPERATION_ADD) | |
| def boot args | |
| args.state = {} | |
| end | |
| def tick args | |
| args.outputs.background_color = [30, 30, 30] | |
| args.outputs[:ring].set w: 512, h: 512, background_color: [0, 0, 0, 0] | |
| args.outputs[:ring].primitives << { x: 256, y: 256, w: 512, h: 512, path: "sprites/solid-circle.png", anchor_x: 0.5, anchor_y: 0.5, r: 0, g: 128, b: 128 } | |
| args.outputs[:ring].primitives << { x: 256, | |
| y: 256, | |
| w: 506, | |
| h: 506, | |
| path: "sprites/solid-circle.png", | |
| anchor_x: 0.5, | |
| anchor_y: 0.5, | |
| blendmode: HOLE_PUNCH_BLENDMODE } | |
| args.state.angle ||= 0 | |
| args.state.quadrent_1 ||= { | |
| x: 512, | |
| y: 256, | |
| w: 256, | |
| h: 256, | |
| anchor_x: 1.0, | |
| anchor_y: 0.0, | |
| } | |
| if args.state.angle <= 90 | |
| args.state.quadrent_1.w = (256 - 256 * args.state.angle.vector_y).clamp(128, 256) | |
| args.state.quadrent_1.h = (256 * args.state.angle.vector_x) | |
| end | |
| args.state.quadrent_2 = { | |
| x: 256, | |
| y: 0, | |
| w: 256, | |
| h: 256, | |
| r: 80, g: 0, b: 0 | |
| } | |
| if args.state.angle > 90 && args.state.angle <= 180 | |
| args.state.quadrent_2.w = (256 * (args.state.angle - 90).vector_x) | |
| args.state.quadrent_2.h = (256 - 256 * (args.state.angle - 90).vector_y).clamp(128, 256) | |
| end | |
| args.state.quadrent_3 = { | |
| x: 0, | |
| y: 256, | |
| w: 256, | |
| h: 256, | |
| r: 0, g: 80, b: 0, | |
| anchor_y: 1.0, | |
| } | |
| if args.state.angle > 180 && args.state.angle <= 270 | |
| args.state.quadrent_3.w = (256 - 256 * (args.state.angle - 180).vector_y).clamp(128, 256) | |
| args.state.quadrent_3.h = (256 * (args.state.angle - 180).vector_x) | |
| end | |
| args.state.quadrent_4 = { | |
| x: 256, | |
| y: 512, | |
| w: 256, | |
| h: 256, | |
| r: 0, g: 0, b: 80, | |
| anchor_y: 1.0, | |
| anchor_x: 1.0, | |
| } | |
| if args.state.angle > 270 && args.state.angle <= 360 | |
| args.state.quadrent_4.w = (256 * (args.state.angle - 270).vector_x) | |
| args.state.quadrent_4.h = (256 - 256 * (args.state.angle - 270).vector_y).clamp(128, 256) | |
| end | |
| args.state.angle += 0.5 | |
| if args.state.angle <= 90 | |
| args.outputs[:ring].primitives << { **args.state.quadrent_1, | |
| path: :solid, | |
| blendmode: HOLE_PUNCH_BLENDMODE } | |
| end | |
| if args.state.angle <= 180 | |
| args.outputs[:ring].primitives << { **args.state.quadrent_2, | |
| path: :solid, | |
| blendmode: HOLE_PUNCH_BLENDMODE } | |
| end | |
| if args.state.angle <= 270 | |
| args.outputs[:ring].primitives << { **args.state.quadrent_3, | |
| path: :solid, | |
| blendmode: HOLE_PUNCH_BLENDMODE } | |
| end | |
| if args.state.angle <= 360 | |
| args.outputs[:ring].primitives << { **args.state.quadrent_4, | |
| path: :solid, | |
| blendmode: HOLE_PUNCH_BLENDMODE } | |
| end | |
| args.outputs<< { x: 640, y: 360, w: 512, h: 512, path: :ring, anchor_x: 0.5, anchor_y: 0.5 } | |
| end | |
| GTK.reset |
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