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// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <glad/glad.h>
class OpenGLState {
public:
struct {
bool enabled; // GL_CULL_FACE
GLenum mode; // GL_CULL_FACE_MODE
GLenum front_face; // GL_FRONT_FACE
} cull;
struct {
bool test_enabled; // GL_DEPTH_TEST
GLenum test_func; // GL_DEPTH_FUNC
GLboolean write_mask; // GL_DEPTH_WRITEMASK
} depth;
struct {
GLboolean red_enabled;
GLboolean green_enabled;
GLboolean blue_enabled;
GLboolean alpha_enabled;
} color_mask; // GL_COLOR_WRITEMASK
struct {
bool test_enabled; // GL_STENCIL_TEST
GLenum test_func; // GL_STENCIL_FUNC
GLint test_ref; // GL_STENCIL_REF
GLuint test_mask; // GL_STENCIL_VALUE_MASK
GLuint write_mask; // GL_STENCIL_WRITEMASK
GLenum action_stencil_fail; // GL_STENCIL_FAIL
GLenum action_depth_fail; // GL_STENCIL_PASS_DEPTH_FAIL
GLenum action_depth_pass; // GL_STENCIL_PASS_DEPTH_PASS
} stencil;
struct {
bool enabled; // GL_BLEND
GLenum rgb_equation; // GL_BLEND_EQUATION_RGB
GLenum a_equation; // GL_BLEND_EQUATION_ALPHA
GLenum src_rgb_func; // GL_BLEND_SRC_RGB
GLenum dst_rgb_func; // GL_BLEND_DST_RGB
GLenum src_a_func; // GL_BLEND_SRC_ALPHA
GLenum dst_a_func; // GL_BLEND_DST_ALPHA
struct {
GLclampf red;
GLclampf green;
GLclampf blue;
GLclampf alpha;
} color; // GL_BLEND_COLOR
} blend;
GLenum logic_op; // GL_LOGIC_OP_MODE
// 3 texture units - one for each that is used in PICA fragment shader emulation
struct {
GLuint texture_2d; // GL_TEXTURE_BINDING_2D
GLuint sampler; // GL_SAMPLER_BINDING
} texture_units[3];
struct {
GLuint texture_1d; // GL_TEXTURE_BINDING_1D
} lighting_luts[6];
struct {
GLuint texture_1d; // GL_TEXTURE_BINDING_1D
} fog_lut;
struct {
GLuint read_framebuffer; // GL_READ_FRAMEBUFFER_BINDING
GLuint draw_framebuffer; // GL_DRAW_FRAMEBUFFER_BINDING
GLuint vertex_array; // GL_VERTEX_ARRAY_BINDING
GLuint vertex_buffer; // GL_ARRAY_BUFFER_BINDING
GLuint uniform_buffer; // GL_UNIFORM_BUFFER_BINDING
GLuint shader_program; // GL_CURRENT_PROGRAM
} draw;
OpenGLState();
/// Get the currently active OpenGL state
static const OpenGLState& GetCurState() {
return cur_state;
}
/// Apply this state as the current OpenGL state
void Apply() const;
/// Check the status of the current OpenGL read or draw framebuffer configuration
static GLenum CheckFBStatus(GLenum target);
/// Resets and unbinds any references to the given resource in the current OpenGL state
static void ResetTexture(GLuint handle);
static void ResetSampler(GLuint handle);
static void ResetProgram(GLuint handle);
static void ResetBuffer(GLuint handle);
static void ResetVertexArray(GLuint handle);
static void ResetFramebuffer(GLuint handle);
private:
static OpenGLState cur_state;
};
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