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/*
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
* Copyright (c) 2022, Jelle Raaijmakers <jelle@gmta.nl>
* Copyright (c) 2022, Ryan Bethke <ryanbethke11@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGL/GLContext.h>
namespace GL {
void GLContext::gl_clip_plane(GLenum plane, GLdouble const* equation)
{
APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(gl_clip_plane, plane, equation);
RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
RETURN_WITH_ERROR_IF((plane < GL_CLIP_PLANE0) || (plane > GL_CLIP_PLANE5), GL_INVALID_ENUM);
auto plane_idx = static_cast<size_t>(plane) - GL_CLIP_PLANE0;
auto eqn = FloatVector4(equation[0], equation[1], equation[2], equation[3]);
m_clip_plane_attributes.eye_clip_plane[plane_idx] = model_view_matrix() * eqn;
m_clip_planes_dirty = true;
}
void GLContext::gl_get_clip_plane(GLenum plane, GLdouble* equation)
{
RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
RETURN_WITH_ERROR_IF((plane < GL_CLIP_PLANE0) || (plane > GL_CLIP_PLANE5), GL_INVALID_ENUM);
auto plane_idx = static_cast<size_t>(plane) - GL_CLIP_PLANE0;
equation[0] = static_cast<GLdouble>(m_clip_plane_attributes.eye_clip_plane[plane_idx][0]);
equation[1] = static_cast<GLdouble>(m_clip_plane_attributes.eye_clip_plane[plane_idx][1]);
equation[2] = static_cast<GLdouble>(m_clip_plane_attributes.eye_clip_plane[plane_idx][2]);
equation[3] = static_cast<GLdouble>(m_clip_plane_attributes.eye_clip_plane[plane_idx][3]);
}
void GLContext::sync_clip_planes()
{
if (!m_clip_planes_dirty)
return;
m_clip_planes_dirty = false;
// TODO: Replace magic number 6 with device-dependent constant
Vector<FloatVector4, 6> user_clip_planes;
for (size_t plane_idx = 0; plane_idx < 6; ++plane_idx) {
if ((m_clip_plane_attributes.enabled & (1 << plane_idx)) != 0u) {
user_clip_planes.append(m_clip_plane_attributes.eye_clip_plane[plane_idx]);
}
}
m_rasterizer->set_clip_planes(user_clip_planes);
}
}
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