{ "format_version": 1, "sksl": { "entrypoint": "stretch_effect_fragment_main", "shader": "// This SkSL shader is autogenerated by spirv-cross.\n\nfloat4 flutter_FragCoord;\n\nuniform vec2 u_size;\nuniform float u_max_stretch_intensity;\nuniform float u_overscroll_x;\nuniform float u_overscroll_y;\nuniform float u_interpolation_strength;\nuniform shader u_texture;\nuniform half2 u_texture_size;\n\nvec4 frag_color;\n\nvec2 FLT_flutter_local_FlutterFragCoord()\n{\n return flutter_FragCoord.xy;\n}\n\nfloat FLT_flutter_local_ease_in(float t, float d)\n{\n return t * d;\n}\n\nfloat FLT_flutter_local_compute_overscroll_start(float in_pos, float overscroll, float u_stretch_affected_dist, float u_inverse_stretch_affected_dist, float distance_stretched, float interpolation_strength)\n{\n float offset_pos = u_stretch_affected_dist - in_pos;\n float param = offset_pos;\n float param_1 = u_inverse_stretch_affected_dist;\n float pos_based_variation = mix(1.0, FLT_flutter_local_ease_in(param, param_1), interpolation_strength);\n float stretch_intensity = overscroll * pos_based_variation;\n return distance_stretched - (offset_pos / (1.0 + stretch_intensity));\n}\n\nfloat FLT_flutter_local_compute_overscroll_end(float in_pos, float overscroll, float reverse_stretch_dist, float u_stretch_affected_dist, float u_inverse_stretch_affected_dist, float distance_stretched, float interpolation_strength, float viewport_dimension)\n{\n float offset_pos = in_pos - reverse_stretch_dist;\n float param = offset_pos;\n float param_1 = u_inverse_stretch_affected_dist;\n float pos_based_variation = mix(1.0, FLT_flutter_local_ease_in(param, param_1), interpolation_strength);\n float stretch_intensity = (-overscroll) * pos_based_variation;\n return viewport_dimension - (distance_stretched - (offset_pos / (1.0 + stretch_intensity)));\n}\n\nfloat FLT_flutter_local_compute_streched_effect(float in_pos, float overscroll, float u_stretch_affected_dist, float u_inverse_stretch_affected_dist, float distance_stretched, float distance_diff, float interpolation_strength, float viewport_dimension)\n{\n if (overscroll > 0.0)\n {\n if (in_pos <= u_stretch_affected_dist)\n {\n float param = in_pos;\n float param_1 = overscroll;\n float param_2 = u_stretch_affected_dist;\n float param_3 = u_inverse_stretch_affected_dist;\n float param_4 = distance_stretched;\n float param_5 = interpolation_strength;\n return FLT_flutter_local_compute_overscroll_start(param, param_1, param_2, param_3, param_4, param_5);\n }\n else\n {\n return distance_diff + in_pos;\n }\n }\n else\n {\n if (overscroll < 0.0)\n {\n float stretch_affected_dist_calc = viewport_dimension - u_stretch_affected_dist;\n if (in_pos >= stretch_affected_dist_calc)\n {\n float param_6 = in_pos;\n float param_7 = overscroll;\n float param_8 = stretch_affected_dist_calc;\n float param_9 = u_stretch_affected_dist;\n float param_10 = u_inverse_stretch_affected_dist;\n float param_11 = distance_stretched;\n float param_12 = interpolation_strength;\n float param_13 = viewport_dimension;\n return FLT_flutter_local_compute_overscroll_end(param_6, param_7, param_8, param_9, param_10, param_11, param_12, param_13);\n }\n else\n {\n return (-distance_diff) + in_pos;\n }\n }\n else\n {\n return in_pos;\n }\n }\n}\n\nvoid FLT_main()\n{\n vec2 uv = FLT_flutter_local_FlutterFragCoord() / u_size;\n float in_u_norm = uv.x;\n float in_v_norm = uv.y;\n bool isVertical = u_overscroll_y != 0.0;\n float overscroll_1 = isVertical ? u_overscroll_y : u_overscroll_x;\n float norm_distance_stretched = 1.0 / (1.0 + abs(overscroll_1));\n float norm_dist_diff = norm_distance_stretched - 1.0;\n float _223;\n if (isVertical)\n {\n _223 = in_u_norm;\n }\n else\n {\n float param_14 = in_u_norm;\n float param_15 = overscroll_1;\n float param_16 = 1.0;\n float param_17 = 1.0;\n float param_18 = norm_distance_stretched;\n float param_19 = norm_dist_diff;\n float param_20 = u_interpolation_strength;\n float param_21 = 1.0;\n _223 = FLT_flutter_local_compute_streched_effect(param_14, param_15, param_16, param_17, param_18, param_19, param_20, param_21);\n }\n float out_u_norm = _223;\n float _246;\n if (isVertical)\n {\n float param_22 = in_v_norm;\n float param_23 = overscroll_1;\n float param_24 = 1.0;\n float param_25 = 1.0;\n float param_26 = norm_distance_stretched;\n float param_27 = norm_dist_diff;\n float param_28 = u_interpolation_strength;\n float param_29 = 1.0;\n _246 = FLT_flutter_local_compute_streched_effect(param_22, param_23, param_24, param_25, param_26, param_27, param_28, param_29);\n }\n else\n {\n _246 = in_v_norm;\n }\n float out_v_norm = _246;\n uv.x = out_u_norm;\n uv.y = out_v_norm;\n frag_color = u_texture.eval(u_texture_size * ( uv));\n}\n\nhalf4 main(float2 iFragCoord)\n{\n flutter_FragCoord = float4(iFragCoord, 0, 0);\n FLT_main();\n return frag_color;\n}\n", "stage": 1, "uniforms": [ { "array_elements": 0, "bit_width": 32, "columns": 1, "location": 0, "name": "u_size", "rows": 2, "type": 10 }, { "array_elements": 0, "bit_width": 0, "columns": 1, "location": 1, "name": "u_texture", "rows": 1, "type": 12 }, { "array_elements": 0, "bit_width": 32, "columns": 1, "location": 2, "name": "u_max_stretch_intensity", "rows": 1, "type": 10 }, { "array_elements": 0, "bit_width": 32, "columns": 1, "location": 3, "name": "u_overscroll_x", "rows": 1, "type": 10 }, { "array_elements": 0, "bit_width": 32, "columns": 1, "location": 4, "name": "u_overscroll_y", "rows": 1, "type": 10 }, { "array_elements": 0, "bit_width": 32, "columns": 1, "location": 5, "name": "u_interpolation_strength", "rows": 1, "type": 10 } ] } }