jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
3 * Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
4 * Copyright (c) 2022, Jelle Raaijmakers <jelle@gmta.nl>
5 * Copyright (c) 2022, Ryan Bethke <ryanbethke11@gmail.com>
6 *
7 * SPDX-License-Identifier: BSD-2-Clause
8 */
9
10#include <LibGL/GLContext.h>
11
12namespace GL {
13
14void GLContext::gl_clip_plane(GLenum plane, GLdouble const* equation)
15{
16 APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(gl_clip_plane, plane, equation);
17
18 RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
19 RETURN_WITH_ERROR_IF((plane < GL_CLIP_PLANE0) || (plane > GL_CLIP_PLANE5), GL_INVALID_ENUM);
20
21 auto plane_idx = static_cast<size_t>(plane) - GL_CLIP_PLANE0;
22
23 auto eqn = FloatVector4(equation[0], equation[1], equation[2], equation[3]);
24 m_clip_plane_attributes.eye_clip_plane[plane_idx] = model_view_matrix() * eqn;
25 m_clip_planes_dirty = true;
26}
27
28void GLContext::gl_get_clip_plane(GLenum plane, GLdouble* equation)
29{
30 RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
31 RETURN_WITH_ERROR_IF((plane < GL_CLIP_PLANE0) || (plane > GL_CLIP_PLANE5), GL_INVALID_ENUM);
32
33 auto plane_idx = static_cast<size_t>(plane) - GL_CLIP_PLANE0;
34 equation[0] = static_cast<GLdouble>(m_clip_plane_attributes.eye_clip_plane[plane_idx][0]);
35 equation[1] = static_cast<GLdouble>(m_clip_plane_attributes.eye_clip_plane[plane_idx][1]);
36 equation[2] = static_cast<GLdouble>(m_clip_plane_attributes.eye_clip_plane[plane_idx][2]);
37 equation[3] = static_cast<GLdouble>(m_clip_plane_attributes.eye_clip_plane[plane_idx][3]);
38}
39
40void GLContext::sync_clip_planes()
41{
42 if (!m_clip_planes_dirty)
43 return;
44 m_clip_planes_dirty = false;
45
46 // TODO: Replace magic number 6 with device-dependent constant
47 Vector<FloatVector4, 6> user_clip_planes;
48 for (size_t plane_idx = 0; plane_idx < 6; ++plane_idx) {
49 if ((m_clip_plane_attributes.enabled & (1 << plane_idx)) != 0u) {
50 user_clip_planes.append(m_clip_plane_attributes.eye_clip_plane[plane_idx]);
51 }
52 }
53 m_rasterizer->set_clip_planes(user_clip_planes);
54}
55
56}