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https://github.com/RGBCube/serenity
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0836912a6d
This commit implements glClipPlane and its supporting calls, backed by new support for user-defined clip planes in the software GPU clipper. This fixes some visual bugs seen in the Quake III port, in which mirrors would only reflect correctly from close distances.
57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
/*
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* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
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* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
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* Copyright (c) 2022, Jelle Raaijmakers <jelle@gmta.nl>
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* Copyright (c) 2022, Ryan Bethke <ryanbethke11@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Debug.h>
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#include <LibGL/GLContext.h>
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namespace GL {
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void GLContext::gl_clip_plane(GLenum plane, GLdouble const* equation)
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{
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APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(gl_clip_plane, plane, equation);
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RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
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RETURN_WITH_ERROR_IF((plane < GL_CLIP_PLANE0) || (plane > GL_CLIP_PLANE5), GL_INVALID_ENUM);
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auto plane_idx = static_cast<size_t>(plane) - GL_CLIP_PLANE0;
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auto eqn = FloatVector4(equation[0], equation[1], equation[2], equation[3]);
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m_clip_plane_attributes.eye_clip_plane[plane_idx] = m_model_view_matrix * eqn;
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m_clip_planes_dirty = true;
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}
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void GLContext::gl_get_clip_plane(GLenum plane, GLdouble* equation)
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{
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RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
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RETURN_WITH_ERROR_IF((plane < GL_CLIP_PLANE0) || (plane > GL_CLIP_PLANE5), GL_INVALID_ENUM);
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auto plane_idx = static_cast<size_t>(plane) - GL_CLIP_PLANE0;
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equation[0] = static_cast<GLdouble>(m_clip_plane_attributes.eye_clip_plane[plane_idx][0]);
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equation[1] = static_cast<GLdouble>(m_clip_plane_attributes.eye_clip_plane[plane_idx][1]);
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equation[2] = static_cast<GLdouble>(m_clip_plane_attributes.eye_clip_plane[plane_idx][2]);
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equation[3] = static_cast<GLdouble>(m_clip_plane_attributes.eye_clip_plane[plane_idx][3]);
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}
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void GLContext::sync_clip_planes()
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{
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if (!m_clip_planes_dirty)
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return;
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m_clip_planes_dirty = false;
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// TODO: Replace magic number 6 with device-dependent constant
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Vector<FloatVector4, 6> user_clip_planes;
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for (size_t plane_idx = 0; plane_idx < 6; ++plane_idx) {
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if ((m_clip_plane_attributes.enabled & (1 << plane_idx)) != 0u) {
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user_clip_planes.append(m_clip_plane_attributes.eye_clip_plane[plane_idx]);
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}
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}
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m_rasterizer->set_clip_planes(user_clip_planes);
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}
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}
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