Differential D16083 Diff 56430 source/blender/gpu/shaders/sculpt_paint/sculpt_paint_image_comp.glsl

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source/blender/gpu/shaders/sculpt_paint/sculpt_paint_image_comp.glsl

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				#pragma BLENDER_REQUIRE(sculpt_paint_image_lib.glsl)

				bool SCULPT_brush_test(PaintBrushTestData test_data,
				PaintStepData step_data,
				vec3 co,
				out float dist)
				{
				#if defined(BRUSH_TEST_SPHERE)
				return SCULPT_brush_test_sphere(test_data, step_data, co, dist);
				#elif defined(BRUSH_TEST_CIRCLE)
				return SCULPT_brush_test_circle(test_data, step_data, co, dist);
				#else
				dist = 0.0;
				return true;
				#endif
				}

				void main()
				{
				PackedPixelRow row = pixel_row_buf[gl_GlobalInvocationID.x + pixel_row_offset];
				TrianglePaintInput triangle = paint_input[PIXEL_ROW_PRIM_INDEX(row)];
				ivec2 image_coord = PIXEL_ROW_START_IMAGE_COORD(row);

				uint row_len = PIXEL_ROW_LEN(row);

				vec3 co1 = vec3(vert_coord_buf[triangle.vert_indices.x]);
				vec3 co2 = vec3(vert_coord_buf[triangle.vert_indices.y]);
				vec3 co3 = vec3(vert_coord_buf[triangle.vert_indices.z]);

				vec3 pos;
				vec3 delta;
				SCULPT_get_row_pos_and_delta(co1, co2, co3, triangle, row, pos, delta);

				for (int x = 0; x < row_len; x++) {
				/* TODO: Do clipping test. */
				vec4 color;
				bool color_read = false;

				for (int step_index = paint_step_range[0]; step_index < paint_step_range[1]; step_index++) {
				PaintStepData step_data = paint_step_buf[step_index];

				float distance;
				bool test_result = SCULPT_brush_test(paint_brush_buf.test, step_data, pos, distance);
				if (test_result) {
				if (!color_read) {
				color = imageLoad(out_img, image_coord);
				color_read = true;
				}
				// TODO: blend with color...
				float factor = SCULPT_hardness_factor(distance, step_data.hardness, step_data.radius);
				float curve_factor = SCULPT_curve_strength(factor, paint_brush_buf.falloff_shape);
				vec4 final_paint_color = SCULPT_blend_color(
				color, paint_brush_buf.color * curve_factor * step_data.strength);
				final_paint_color *= paint_brush_buf.alpha;
				color = SCULPT_blend_color(color, final_paint_color);
				}
				}
				if (color_read) {
				imageStore(out_img, image_coord, color);
				}
				image_coord.x += 1;
				pos += delta;
				}
				}
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