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/*
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
* Copyright (c) 2022, Jelle Raaijmakers <jelle@gmta.nl>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/RefPtr.h>
#include <AK/Vector.h>
#include <LibGL/Tex/Texture2D.h>
#include <LibGfx/Matrix4x4.h>
namespace GL {
class TextureUnit {
public:
TextureUnit() = default;
RefPtr<Texture2D> texture_2d_target_texture() const { return m_texture_2d_target_texture; }
void set_texture_2d_target_texture(RefPtr<Texture2D> const& texture) { m_texture_2d_target_texture = texture; }
void set_alpha_combinator(GLenum combinator) { m_alpha_combinator = combinator; }
GLenum alpha_combinator() const { return m_alpha_combinator; }
void set_alpha_operand(size_t index, GLenum operand) { m_alpha_operand[index] = operand; }
GLenum alpha_operand(size_t index) const { return m_alpha_operand[index]; }
void set_alpha_scale(float scale) { m_alpha_scale = scale; }
float alpha_scale() const { return m_alpha_scale; }
void set_alpha_source(size_t index, GLenum source) { m_alpha_source[index] = source; }
GLenum alpha_source(size_t index) const { return m_alpha_source[index]; }
void set_color(FloatVector4 color) { m_color = color; }
FloatVector4 color() const { return m_color; }
void set_env_mode(GLenum mode) { m_env_mode = mode; }
GLenum env_mode() const { return m_env_mode; }
void set_level_of_detail_bias(float bias) { m_level_of_detail_bias = bias; }
float level_of_detail_bias() const { return m_level_of_detail_bias; }
void set_rgb_combinator(GLenum combinator) { m_rgb_combinator = combinator; }
GLenum rgb_combinator() const { return m_rgb_combinator; }
void set_rgb_operand(size_t index, GLenum operand) { m_rgb_operand[index] = operand; }
GLenum rgb_operand(size_t index) const { return m_rgb_operand[index]; }
void set_rgb_scale(float scale) { m_rgb_scale = scale; }
float rgb_scale() const { return m_rgb_scale; }
void set_rgb_source(size_t index, GLenum source) { m_rgb_source[index] = source; }
GLenum rgb_source(size_t index) const { return m_rgb_source[index]; }
bool texture_1d_enabled() const { return m_texture_1d_enabled; };
void set_texture_1d_enabled(bool texture_1d_enabled) { m_texture_1d_enabled = texture_1d_enabled; }
bool texture_2d_enabled() const { return m_texture_2d_enabled; };
void set_texture_2d_enabled(bool texture_2d_enabled) { m_texture_2d_enabled = texture_2d_enabled; }
bool texture_3d_enabled() const { return m_texture_3d_enabled; };
void set_texture_3d_enabled(bool texture_3d_enabled) { m_texture_3d_enabled = texture_3d_enabled; }
bool texture_cube_map_enabled() const { return m_texture_cube_map_enabled; };
void set_texture_cube_map_enabled(bool texture_cube_map_enabled) { m_texture_cube_map_enabled = texture_cube_map_enabled; }
FloatMatrix4x4& texture_matrix() { return m_texture_matrix_stack.last(); }
Vector<FloatMatrix4x4>& texture_matrix_stack() { return m_texture_matrix_stack; }
private:
GLenum m_alpha_combinator { GL_MODULATE };
Array<GLenum, 3> m_alpha_operand { GL_SRC_ALPHA, GL_SRC_ALPHA, GL_SRC_ALPHA };
float m_alpha_scale { 1.f };
Array<GLenum, 3> m_alpha_source { GL_TEXTURE, GL_PREVIOUS, GL_CONSTANT };
FloatVector4 m_color { 0.f, 0.f, 0.f, 0.f };
GLenum m_env_mode { GL_MODULATE };
float m_level_of_detail_bias { 0.f };
GLenum m_rgb_combinator { GL_MODULATE };
Array<GLenum, 3> m_rgb_operand { GL_SRC_COLOR, GL_SRC_COLOR, GL_SRC_ALPHA };
float m_rgb_scale { 1.f };
Array<GLenum, 3> m_rgb_source { GL_TEXTURE, GL_PREVIOUS, GL_CONSTANT };
// Bound textures
RefPtr<Texture2D> m_texture_2d_target_texture {};
// Texturing state per unit, in increasing priority:
bool m_texture_1d_enabled { false };
bool m_texture_2d_enabled { false };
bool m_texture_3d_enabled { false };
bool m_texture_cube_map_enabled { false };
// Matrix stack for this unit
Vector<FloatMatrix4x4> m_texture_matrix_stack { FloatMatrix4x4::identity() };
};
}
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