From 940b4d1848e8c70ab7642901a68594e8016caffc Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 18:51:28 +0200 Subject: Adding upstream version 1:7.0.4. Signed-off-by: Daniel Baumann --- vcl/opengl/shaders/lineVertexShader.glsl | 37 ++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 vcl/opengl/shaders/lineVertexShader.glsl (limited to 'vcl/opengl/shaders/lineVertexShader.glsl') diff --git a/vcl/opengl/shaders/lineVertexShader.glsl b/vcl/opengl/shaders/lineVertexShader.glsl new file mode 100644 index 000000000..e26be78d0 --- /dev/null +++ b/vcl/opengl/shaders/lineVertexShader.glsl @@ -0,0 +1,37 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ + +attribute vec2 position; +attribute vec4 extrusion_vectors; + +varying float fade_factor; // fade factor for anti-aliasing + +uniform float line_width; +uniform float feather; // width where we fade the line + +uniform mat4 mvp; + +void main() +{ + vec2 extrusion_vector = extrusion_vectors.xy; + // miter factor to additionally lengthen the distance of vertex (needed for miter) + // if 1.0 - miter_factor has no effect + float miter_factor = 1.0f / abs(extrusion_vectors.z); + // fade factor is always -1.0 or 1.0 -> we transport that info together with length + fade_factor = sign(extrusion_vectors.z); + + float rendered_thickness = (line_width + feather * 2.0) * miter_factor; + + // lengthen the vertex in direction of the extrusion vector by line width. + vec4 position = vec4(position + (extrusion_vector * (rendered_thickness / 2.0) ), 0.0, 1.0); + + gl_Position = mvp * position; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ -- cgit v1.2.3