/*
 * This file is part of mpv.
 *
 * mpv is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * mpv is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef MPLAYER_GL_COMMON_H
#define MPLAYER_GL_COMMON_H

#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#if 0
#include "config.h"
#include "common/msg.h"
#include "misc/bstr.h"

#include "video/out/vo.h"
#include "video/csputils.h"
#include "video/mp_image.h"
#endif

#if HAVE_GL_COCOA
#define GL_DO_NOT_WARN_IF_MULTI_GL_VERSION_HEADERS_INCLUDED 1
#include <OpenGL/gl.h>
#include <OpenGL/gl3.h>
#include <OpenGL/glext.h>
#elif HAVE_IOS_GL
#include <OpenGLES/ES2/glext.h>
#include <OpenGLES/ES3/glext.h>
#elif HAVE_ANDROID_GL
#include <GLES3/gl3.h>
#else
#include <GL/gl.h>
#include <GL/glext.h>
#endif

#define MP_GET_GL_WORKAROUNDS
#include "header_fixes.h"

struct GL;
typedef struct GL GL;

enum
{
    MPGL_CAP_ROW_LENGTH = (1 << 4),     // GL_[UN]PACK_ROW_LENGTH
    MPGL_CAP_FB = (1 << 5),
    MPGL_CAP_VAO = (1 << 6),
    MPGL_CAP_TEX_RG = (1 << 10),        // GL_ARB_texture_rg / GL 3.x
    MPGL_CAP_VDPAU = (1 << 11),         // GL_NV_vdpau_interop
    MPGL_CAP_APPLE_RGB_422 = (1 << 12), // GL_APPLE_rgb_422
    MPGL_CAP_1D_TEX = (1 << 14),
    MPGL_CAP_3D_TEX = (1 << 15),
    MPGL_CAP_DEBUG = (1 << 16),
    MPGL_CAP_DXINTEROP = (1 << 17),     // WGL_NV_DX_interop
    MPGL_CAP_EXT16 = (1 << 18),         // GL_EXT_texture_norm16
    MPGL_CAP_ARB_FLOAT = (1 << 19),     // GL_ARB_texture_float
    MPGL_CAP_EXT_CR_HFLOAT = (1 << 20), // GL_EXT_color_buffer_half_float

    MPGL_CAP_SW = (1 << 30),            // indirect or sw renderer
};

// E.g. 310 means 3.1
// Code doesn't have to use the macros; they are for convenience only.
#define MPGL_VER(major, minor) (((major) * 100) + (minor) * 10)
#define MPGL_VER_GET_MAJOR(ver) ((unsigned)(ver) / 100)
#define MPGL_VER_GET_MINOR(ver) ((unsigned)(ver) % 100 / 10)

#define MPGL_VER_P(ver) MPGL_VER_GET_MAJOR(ver), MPGL_VER_GET_MINOR(ver)

void mpgl_load_functions(GL * gl, void *(*getProcAddress)(const GLubyte *), const char *ext2, struct mp_log *log);
void mpgl_load_functions2(GL * gl, void *(*get_fn)(void *ctx, const char *n), void *fn_ctx, const char *ext2,
    struct mp_log *log);

typedef void (GLAPIENTRY * MP_GLDEBUGPROC) (GLenum, GLenum, GLuint, GLenum, GLsizei, const GLchar *, const void *);

//function pointers loaded from the OpenGL library
struct GL
{
    int version;                        // MPGL_VER() mangled (e.g. 210 for 2.1)
    int es;                             // es version (e.g. 300), 0 for desktop GL
    int glsl_version;                   // e.g. 130 for GLSL 1.30
    char *extensions;                   // Equivalent to GL_EXTENSIONS
    int mpgl_caps;                      // Bitfield of MPGL_CAP_* constants
    bool debug_context;                 // use of e.g. GLX_CONTEXT_DEBUG_BIT_ARB
    GLuint main_fb;                     // framebuffer to render to (normally 0)

    void (GLAPIENTRY * Viewport) (GLint, GLint, GLsizei, GLsizei);
    void (GLAPIENTRY * Clear) (GLbitfield);
    void (GLAPIENTRY * GenTextures) (GLsizei, GLuint *);
    void (GLAPIENTRY * DeleteTextures) (GLsizei, const GLuint *);
    void (GLAPIENTRY * ClearColor) (GLclampf, GLclampf, GLclampf, GLclampf);
    void (GLAPIENTRY * Enable) (GLenum);
    void (GLAPIENTRY * Disable) (GLenum);
    const GLubyte *(GLAPIENTRY * GetString) (GLenum);
    void (GLAPIENTRY * BlendFuncSeparate) (GLenum, GLenum, GLenum, GLenum);
    void (GLAPIENTRY * Flush) (void);
    void (GLAPIENTRY * Finish) (void);
    void (GLAPIENTRY * PixelStorei) (GLenum, GLint);
    void (GLAPIENTRY * TexImage1D) (GLenum, GLint, GLint, GLsizei, GLint, GLenum, GLenum, const GLvoid *);
    void (GLAPIENTRY * TexImage2D) (GLenum, GLint, GLint, GLsizei, GLsizei, GLint, GLenum, GLenum, const GLvoid *);
    void (GLAPIENTRY * TexSubImage2D) (GLenum, GLint, GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, const GLvoid *);
    void (GLAPIENTRY * TexParameteri) (GLenum, GLenum, GLint);
    void (GLAPIENTRY * GetIntegerv) (GLenum, GLint *);
    void (GLAPIENTRY * ReadPixels) (GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, GLvoid *);
    void (GLAPIENTRY * ReadBuffer) (GLenum);
    void (GLAPIENTRY * DrawArrays) (GLenum, GLint, GLsizei);
     GLenum(GLAPIENTRY * GetError) (void);
    void (GLAPIENTRY * GetTexLevelParameteriv) (GLenum, GLint, GLenum, GLint *);
    void (GLAPIENTRY * Scissor) (GLint, GLint, GLsizei, GLsizei);

    void (GLAPIENTRY * GenBuffers) (GLsizei, GLuint *);
    void (GLAPIENTRY * DeleteBuffers) (GLsizei, const GLuint *);
    void (GLAPIENTRY * BindBuffer) (GLenum, GLuint);
    void (GLAPIENTRY * BindBufferBase) (GLenum, GLuint, GLuint);
    GLvoid *(GLAPIENTRY * MapBufferRange) (GLenum, GLintptr, GLsizeiptr, GLbitfield);
     GLboolean(GLAPIENTRY * UnmapBuffer) (GLenum);
    void (GLAPIENTRY * BufferData) (GLenum, intptr_t, const GLvoid *, GLenum);
    void (GLAPIENTRY * ActiveTexture) (GLenum);
    void (GLAPIENTRY * BindTexture) (GLenum, GLuint);
    int (GLAPIENTRY * SwapInterval) (int);
    void (GLAPIENTRY * TexImage3D) (GLenum, GLint, GLenum, GLsizei, GLsizei, GLsizei, GLint, GLenum, GLenum,
        const GLvoid *);

    void (GLAPIENTRY * GenVertexArrays) (GLsizei, GLuint *);
    void (GLAPIENTRY * BindVertexArray) (GLuint);
     GLint(GLAPIENTRY * GetAttribLocation) (GLuint, const GLchar *);
    void (GLAPIENTRY * EnableVertexAttribArray) (GLuint);
    void (GLAPIENTRY * DisableVertexAttribArray) (GLuint);
    void (GLAPIENTRY * VertexAttribPointer) (GLuint, GLint, GLenum, GLboolean, GLsizei, const GLvoid *);
    void (GLAPIENTRY * DeleteVertexArrays) (GLsizei, const GLuint *);
    void (GLAPIENTRY * UseProgram) (GLuint);
     GLint(GLAPIENTRY * GetUniformLocation) (GLuint, const GLchar *);
    void (GLAPIENTRY * CompileShader) (GLuint);
     GLuint(GLAPIENTRY * CreateProgram) (void);
     GLuint(GLAPIENTRY * CreateShader) (GLenum);
    void (GLAPIENTRY * ShaderSource) (GLuint, GLsizei, const GLchar **, const GLint *);
    void (GLAPIENTRY * LinkProgram) (GLuint);
    void (GLAPIENTRY * AttachShader) (GLuint, GLuint);
    void (GLAPIENTRY * DeleteShader) (GLuint);
    void (GLAPIENTRY * DeleteProgram) (GLuint);
    void (GLAPIENTRY * GetShaderInfoLog) (GLuint, GLsizei, GLsizei *, GLchar *);
    void (GLAPIENTRY * GetShaderiv) (GLuint, GLenum, GLint *);
    void (GLAPIENTRY * GetProgramInfoLog) (GLuint, GLsizei, GLsizei *, GLchar *);
    void (GLAPIENTRY * GetProgramiv) (GLenum, GLenum, GLint *);
    const GLubyte *(GLAPIENTRY * GetStringi) (GLenum, GLuint);
    void (GLAPIENTRY * BindAttribLocation) (GLuint, GLuint, const GLchar *);
    void (GLAPIENTRY * BindFramebuffer) (GLenum, GLuint);
    void (GLAPIENTRY * GenFramebuffers) (GLsizei, GLuint *);
    void (GLAPIENTRY * DeleteFramebuffers) (GLsizei, const GLuint *);
     GLenum(GLAPIENTRY * CheckFramebufferStatus) (GLenum);
    void (GLAPIENTRY * FramebufferTexture2D) (GLenum, GLenum, GLenum, GLuint, GLint);
    void (GLAPIENTRY * BlitFramebuffer) (GLint, GLint, GLint, GLint, GLint, GLint, GLint, GLint, GLbitfield, GLenum);
    void (GLAPIENTRY * GetFramebufferAttachmentParameteriv) (GLenum, GLenum, GLenum, GLint *);

    void (GLAPIENTRY * Uniform1f) (GLint, GLfloat);
    void (GLAPIENTRY * Uniform2f) (GLint, GLfloat, GLfloat);
    void (GLAPIENTRY * Uniform3f) (GLint, GLfloat, GLfloat, GLfloat);
    void (GLAPIENTRY * Uniform4f) (GLint, GLfloat, GLfloat, GLfloat, GLfloat);
    void (GLAPIENTRY * Uniform1i) (GLint, GLint);
    void (GLAPIENTRY * UniformMatrix2fv) (GLint, GLsizei, GLboolean, const GLfloat *);
    void (GLAPIENTRY * UniformMatrix3fv) (GLint, GLsizei, GLboolean, const GLfloat *);

    void (GLAPIENTRY * InvalidateFramebuffer) (GLenum, GLsizei, const GLenum *);

     GLsync(GLAPIENTRY * FenceSync) (GLenum, GLbitfield);
     GLenum(GLAPIENTRY * ClientWaitSync) (GLsync, GLbitfield, GLuint64);
    void (GLAPIENTRY * DeleteSync) (GLsync sync);

    void (GLAPIENTRY * GenQueries) (GLsizei, GLuint *);
    void (GLAPIENTRY * DeleteQueries) (GLsizei, const GLuint *);
    void (GLAPIENTRY * BeginQuery) (GLenum, GLuint);
    void (GLAPIENTRY * EndQuery) (GLenum);
    void (GLAPIENTRY * QueryCounter) (GLuint, GLenum);
     GLboolean(GLAPIENTRY * IsQuery) (GLuint);
    void (GLAPIENTRY * GetQueryObjectiv) (GLuint, GLenum, GLint *);
    void (GLAPIENTRY * GetQueryObjecti64v) (GLuint, GLenum, GLint64 *);
    void (GLAPIENTRY * GetQueryObjectuiv) (GLuint, GLenum, GLuint *);
    void (GLAPIENTRY * GetQueryObjectui64v) (GLuint, GLenum, GLuint64 *);

    void (GLAPIENTRY * VDPAUInitNV) (const GLvoid *, const GLvoid *);
    void (GLAPIENTRY * VDPAUFiniNV) (void);
     GLvdpauSurfaceNV(GLAPIENTRY * VDPAURegisterOutputSurfaceNV)
     (GLvoid *, GLenum, GLsizei, const GLuint *);
     GLvdpauSurfaceNV(GLAPIENTRY * VDPAURegisterVideoSurfaceNV)
     (GLvoid *, GLenum, GLsizei, const GLuint *);
    void (GLAPIENTRY * VDPAUUnregisterSurfaceNV) (GLvdpauSurfaceNV);
    void (GLAPIENTRY * VDPAUSurfaceAccessNV) (GLvdpauSurfaceNV, GLenum);
    void (GLAPIENTRY * VDPAUMapSurfacesNV) (GLsizei, const GLvdpauSurfaceNV *);
    void (GLAPIENTRY * VDPAUUnmapSurfacesNV) (GLsizei, const GLvdpauSurfaceNV *);

#if HAVE_GL_WIN32
    // The HANDLE type might not be present on non-Win32
     BOOL(GLAPIENTRY * DXSetResourceShareHandleNV) (void *dxObject, HANDLE shareHandle);
     HANDLE(GLAPIENTRY * DXOpenDeviceNV) (void *dxDevice);
     BOOL(GLAPIENTRY * DXCloseDeviceNV) (HANDLE hDevice);
     HANDLE(GLAPIENTRY * DXRegisterObjectNV) (HANDLE hDevice, void *dxObject, GLuint name, GLenum type, GLenum access);
     BOOL(GLAPIENTRY * DXUnregisterObjectNV) (HANDLE hDevice, HANDLE hObject);
     BOOL(GLAPIENTRY * DXLockObjectsNV) (HANDLE hDevice, GLint count, HANDLE * hObjects);
     BOOL(GLAPIENTRY * DXUnlockObjectsNV) (HANDLE hDevice, GLint count, HANDLE * hObjects);
#endif

     GLint(GLAPIENTRY * GetVideoSync) (GLuint *);
     GLint(GLAPIENTRY * WaitVideoSync) (GLint, GLint, unsigned int *);

    void (GLAPIENTRY * GetTranslatedShaderSourceANGLE) (GLuint, GLsizei, GLsizei *, GLchar * source);

    void (GLAPIENTRY * DebugMessageCallback) (MP_GLDEBUGPROC callback, const void *userParam);

    void *(GLAPIENTRY * MPGetNativeDisplay) (const char *name);
};

#endif /* MPLAYER_GL_COMMON_H */