#pragma once

#include <cstddef>

// Pointers to OpenGL ES 2.0 functions. They must be
// initialized by the platform at linking time.

#ifndef NDEBUG
#define MBGL_CHECK_ERROR(cmd) ([&]() { struct __MBGL_CHECK_ERROR { ~__MBGL_CHECK_ERROR() noexcept(false) { mbgl::platform::glCheckError(#cmd, __FILE__, __LINE__); } } __MBGL_CHECK_ERROR; return cmd; }())
#else
#define MBGL_CHECK_ERROR(cmd) (cmd)
#endif

namespace mbgl {
namespace platform {

using GLbitfield = unsigned int;
using GLboolean = unsigned char;
using GLchar = char;
using GLdouble = double;
using GLenum = unsigned int;
using GLfloat = float;
using GLint = int;
using GLsizei = int;
using GLubyte = unsigned char;
using GLuint = unsigned int;
using GLvoid = void;

#if defined(_WIN32)
using GLintptr = long long;
using GLsizeiptr = long long;
#else
using GLintptr = long;
using GLsizeiptr = long;
#endif

/// Pointer to glActiveTexture OpenGL function.
extern void (* const glActiveTexture)(GLenum);
/// Pointer to glAttachShader OpenGL function.
extern void (* const glAttachShader)(GLuint, GLuint);
/// Pointer to glBindAttribLocation OpenGL function.
extern void (* const glBindAttribLocation)(GLuint, GLuint, const GLchar *);
/// Pointer to glBindBuffer OpenGL function.
extern void (* const glBindBuffer)(GLenum, GLuint);
/// Pointer to glBindFramebuffer OpenGL function.
extern void (* const glBindFramebuffer)(GLenum, GLuint);
/// Pointer to glBindRenderbuffer OpenGL function.
extern void (* const glBindRenderbuffer)(GLenum, GLuint);
/// Pointer to glBindTexture OpenGL function.
extern void (* const glBindTexture)(GLenum, GLuint);
/// Pointer to glBlendColor OpenGL function.
extern void (* const glBlendColor)(GLfloat, GLfloat, GLfloat, GLfloat);
/// Pointer to glBlendEquation OpenGL function.
extern void (* const glBlendEquation)(GLenum);
/// Pointer to glBlendEquationSeparate OpenGL function.
extern void (* const glBlendEquationSeparate)(GLenum, GLenum);
/// Pointer to glBlendFunc OpenGL function.
extern void (* const glBlendFunc)(GLenum, GLenum);
/// Pointer to glBlendFuncSeparate OpenGL function.
extern void (* const glBlendFuncSeparate)(GLenum, GLenum, GLenum, GLenum);
/// Pointer to glBufferData OpenGL function.
extern void (* const glBufferData)(GLenum, GLsizeiptr, const void *, GLenum);
/// Pointer to glBufferSubData OpenGL function.
extern void (* const glBufferSubData)(GLenum, GLintptr, GLsizeiptr, const void *);
/// Pointer to glCheckFramebufferStatus OpenGL function.
extern GLenum (* const glCheckFramebufferStatus)(GLenum);
/// Pointer to glClear OpenGL function.
extern void (* const glClear)(GLbitfield);
/// Pointer to glClearColor OpenGL function.
extern void (* const glClearColor)(GLfloat, GLfloat, GLfloat, GLfloat);
/// Pointer to glClearDepthf OpenGL function.
extern void (* const glClearDepthf)(GLfloat);
/// Pointer to glClearStencil OpenGL function.
extern void (* const glClearStencil)(GLint);
/// Pointer to glColorMask OpenGL function.
extern void (* const glColorMask)(GLboolean, GLboolean, GLboolean, GLboolean);
/// Pointer to glCompileShader OpenGL function.
extern void (* const glCompileShader)(GLuint);
/// Pointer to glCompressedTexImage2D OpenGL function.
extern void (* const glCompressedTexImage2D)(GLenum, GLint, GLenum, GLsizei, GLsizei, GLint, GLsizei, const void *);
/// Pointer to glCompressedTexSubImage2D OpenGL function.
extern void (* const glCompressedTexSubImage2D)(GLenum, GLint, GLint, GLint, GLsizei, GLsizei, GLenum, GLsizei, const void *);
/// Pointer to glCopyTexImage2D OpenGL function.
extern void (* const glCopyTexImage2D)(GLenum, GLint, GLenum, GLint, GLint, GLsizei, GLsizei, GLint);
/// Pointer to glCopyTexSubImage2D OpenGL function.
extern void (* const glCopyTexSubImage2D)(GLenum, GLint, GLint, GLint, GLint, GLint, GLsizei, GLsizei);
/// Pointer to glCreateProgram OpenGL function.
extern GLuint (* const glCreateProgram)();
/// Pointer to glCreateShader OpenGL function.
extern GLuint (* const glCreateShader)(GLenum);
/// Pointer to glCullFace OpenGL function.
extern void (* const glCullFace)(GLenum);
/// Pointer to glDeleteBuffers OpenGL function.
extern void (* const glDeleteBuffers)(GLsizei, const GLuint *);
/// Pointer to glDeleteFramebuffers OpenGL function.
extern void (* const glDeleteFramebuffers)(GLsizei, const GLuint *);
/// Pointer to glDeleteProgram OpenGL function.
extern void (* const glDeleteProgram)(GLuint);
/// Pointer to glDeleteRenderbuffers OpenGL function.
extern void (* const glDeleteRenderbuffers)(GLsizei, const GLuint *);
/// Pointer to glDeleteShader OpenGL function.
extern void (* const glDeleteShader)(GLuint);
/// Pointer to glDeleteTextures OpenGL function.
extern void (* const glDeleteTextures)(GLsizei, const GLuint *);
/// Pointer to glDepthFunc OpenGL function.
extern void (* const glDepthFunc)(GLenum);
/// Pointer to glDepthMask OpenGL function.
extern void (* const glDepthMask)(GLboolean);
/// Pointer to glDepthRangef OpenGL function.
extern void (* const glDepthRangef)(GLfloat, GLfloat);
/// Pointer to glDetachShader OpenGL function.
extern void (* const glDetachShader)(GLuint, GLuint);
/// Pointer to glDisable OpenGL function.
extern void (* const glDisable)(GLenum);
/// Pointer to glDisableVertexAttribArray OpenGL function.
extern void (* const glDisableVertexAttribArray)(GLuint);
/// Pointer to glDrawArrays OpenGL function.
extern void (* const glDrawArrays)(GLenum, GLint, GLsizei);
/// Pointer to glDrawElements OpenGL function.
extern void (* const glDrawElements)(GLenum, GLsizei, GLenum, const void *);
/// Pointer to glEnable OpenGL function.
extern void (* const glEnable)(GLenum);
/// Pointer to glEnableVertexAttribArray OpenGL function.
extern void (* const glEnableVertexAttribArray)(GLuint);
/// Pointer to glFinish OpenGL function.
extern void (* const glFinish)();
/// Pointer to glFlush OpenGL function.
extern void (* const glFlush)();
/// Pointer to glFramebufferRenderbuffer OpenGL function.
extern void (* const glFramebufferRenderbuffer)(GLenum, GLenum, GLenum, GLuint);
/// Pointer to glFramebufferTexture2D OpenGL function.
extern void (* const glFramebufferTexture2D)(GLenum, GLenum, GLenum, GLuint, GLint);
/// Pointer to glFrontFace OpenGL function.
extern void (* const glFrontFace)(GLenum);
/// Pointer to glGenBuffers OpenGL function.
extern void (* const glGenBuffers)(GLsizei, GLuint *);
/// Pointer to glGenerateMipmap OpenGL function.
extern void (* const glGenerateMipmap)(GLenum);
/// Pointer to glGenFramebuffers OpenGL function.
extern void (* const glGenFramebuffers)(GLsizei, GLuint *);
/// Pointer to glGenRenderbuffers OpenGL function.
extern void (* const glGenRenderbuffers)(GLsizei, GLuint *);
/// Pointer to glGenTextures OpenGL function.
extern void (* const glGenTextures)(GLsizei, GLuint *);
/// Pointer to glGetActiveAttrib OpenGL function.
extern void (* const glGetActiveAttrib)(GLuint, GLuint, GLsizei, GLsizei *, GLint *, GLenum *, GLchar *);
/// Pointer to glGetActiveUniform OpenGL function.
extern void (* const glGetActiveUniform)(GLuint, GLuint, GLsizei, GLsizei *, GLint *, GLenum *, GLchar *);
/// Pointer to glGetAttachedShaders OpenGL function.
extern void (* const glGetAttachedShaders)(GLuint, GLsizei, GLsizei *, GLuint *);
/// Pointer to glGetAttribLocation OpenGL function.
extern GLint (* const glGetAttribLocation)(GLuint, const GLchar *);
/// Pointer to glGetBooleanv OpenGL function.
extern void (* const glGetBooleanv)(GLenum, GLboolean *);
/// Pointer to glGetBufferParameteriv OpenGL function.
extern void (* const glGetBufferParameteriv)(GLenum, GLenum, GLint *);
/// Pointer to glGetError OpenGL function.
extern GLenum (* const glGetError)();
/// Pointer to glGetFloatv OpenGL function.
extern void (* const glGetFloatv)(GLenum, GLfloat *);
/// Pointer to glGetFramebufferAttachmentParameteriv OpenGL function.
extern void (* const glGetFramebufferAttachmentParameteriv)(GLenum, GLenum, GLenum, GLint *);
/// Pointer to glGetIntegerv OpenGL function.
extern void (* const glGetIntegerv)(GLenum, GLint *);
/// Pointer to glGetProgramInfoLog OpenGL function.
extern void (* const glGetProgramInfoLog)(GLuint, GLsizei, GLsizei *, GLchar *);
/// Pointer to glGetProgramiv OpenGL function.
extern void (* const glGetProgramiv)(GLuint, GLenum, GLint *);
/// Pointer to glGetRenderbufferParameteriv OpenGL function.
extern void (* const glGetRenderbufferParameteriv)(GLenum, GLenum, GLint *);
/// Pointer to glGetShaderInfoLog OpenGL function.
extern void (* const glGetShaderInfoLog)(GLuint, GLsizei, GLsizei *, GLchar *);
/// Pointer to glGetShaderiv OpenGL function.
extern void (* const glGetShaderiv)(GLuint, GLenum, GLint *);
/// Pointer to glGetShaderSource OpenGL function.
extern void (* const glGetShaderSource)(GLuint, GLsizei, GLsizei *, GLchar *);
/// Pointer to glGetString OpenGL function.
extern const GLubyte *(*glGetString)(GLenum);
/// Pointer to glGetTexParameterfv OpenGL function.
extern void (* const glGetTexParameterfv)(GLenum, GLenum, GLfloat *);
/// Pointer to glGetTexParameteriv OpenGL function.
extern void (* const glGetTexParameteriv)(GLenum, GLenum, GLint *);
/// Pointer to glGetUniformfv OpenGL function.
extern void (* const glGetUniformfv)(GLuint, GLint, GLfloat *);
/// Pointer to glGetUniformiv OpenGL function.
extern void (* const glGetUniformiv)(GLuint, GLint, GLint *);
/// Pointer to glGetUniformLocation OpenGL function.
extern GLint (* const glGetUniformLocation)(GLuint, const GLchar *);
/// Pointer to glGetVertexAttribfv OpenGL function.
extern void (* const glGetVertexAttribfv)(GLuint, GLenum, GLfloat *);
/// Pointer to glGetVertexAttribiv OpenGL function.
extern void (* const glGetVertexAttribiv)(GLuint, GLenum, GLint *);
/// Pointer to glGetVertexAttribPointerv OpenGL function.
extern void (* const glGetVertexAttribPointerv)(GLuint, GLenum, void **);
/// Pointer to glHint OpenGL function.
extern void (* const glHint)(GLenum, GLenum);
/// Pointer to glIsBuffer OpenGL function.
extern GLboolean (* const glIsBuffer)(GLuint);
/// Pointer to glIsEnabled OpenGL function.
extern GLboolean (* const glIsEnabled)(GLenum);
/// Pointer to glIsFramebuffer OpenGL function.
extern GLboolean (* const glIsFramebuffer)(GLuint);
/// Pointer to glIsProgram OpenGL function.
extern GLboolean (* const glIsProgram)(GLuint);
/// Pointer to glIsRenderbuffer OpenGL function.
extern GLboolean (* const glIsRenderbuffer)(GLuint);
/// Pointer to glIsShader OpenGL function.
extern GLboolean (* const glIsShader)(GLuint);
/// Pointer to glIsTexture OpenGL function.
extern GLboolean (* const glIsTexture)(GLuint);
/// Pointer to glLineWidth OpenGL function.
extern void (* const glLineWidth)(GLfloat);
/// Pointer to glLinkProgram OpenGL function.
extern void (* const glLinkProgram)(GLuint);
/// Pointer to glPixelStorei OpenGL function.
extern void (* const glPixelStorei)(GLenum, GLint);
/// Pointer to glPolygonOffset OpenGL function.
extern void (* const glPolygonOffset)(GLfloat, GLfloat);
/// Pointer to glReadPixels OpenGL function.
extern void (* const glReadPixels)(GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, void *);
/// Pointer to glRenderbufferStorage OpenGL function.
extern void (* const glRenderbufferStorage)(GLenum, GLenum, GLsizei, GLsizei);
/// Pointer to glSampleCoverage OpenGL function.
extern void (* const glSampleCoverage)(GLfloat, GLboolean);
/// Pointer to glScissor OpenGL function.
extern void (* const glScissor)(GLint, GLint, GLsizei, GLsizei);
/// Pointer to glShaderSource OpenGL function.
extern void (* const glShaderSource)(GLuint, GLsizei, const GLchar * const*, const GLint *);
/// Pointer to glStencilFunc OpenGL function.
extern void (* const glStencilFunc)(GLenum, GLint, GLuint);
/// Pointer to glStencilFuncSeparate OpenGL function.
extern void (* const glStencilFuncSeparate)(GLenum, GLenum, GLint, GLuint);
/// Pointer to glStencilMask OpenGL function.
extern void (* const glStencilMask)(GLuint);
/// Pointer to glStencilMaskSeparate OpenGL function.
extern void (* const glStencilMaskSeparate)(GLenum, GLuint);
/// Pointer to glStencilOp OpenGL function.
extern void (* const glStencilOp)(GLenum, GLenum, GLenum);
/// Pointer to glStencilOpSeparate OpenGL function.
extern void (* const glStencilOpSeparate)(GLenum, GLenum, GLenum, GLenum);
/// Pointer to glTexImage2D OpenGL function.
extern void (* const glTexImage2D)(GLenum, GLint, GLint, GLsizei, GLsizei, GLint, GLenum, GLenum, const void *);
/// Pointer to glTexParameterf OpenGL function.
extern void (* const glTexParameterf)(GLenum, GLenum, GLfloat);
/// Pointer to glTexParameterfv OpenGL function.
extern void (* const glTexParameterfv)(GLenum, GLenum, const GLfloat *);
/// Pointer to glTexParameteri OpenGL function.
extern void (* const glTexParameteri)(GLenum, GLenum, GLint);
/// Pointer to glTexParameteriv OpenGL function.
extern void (* const glTexParameteriv)(GLenum, GLenum, const GLint *);
/// Pointer to glTexSubImage2D OpenGL function.
extern void (* const glTexSubImage2D)(GLenum, GLint, GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, const void *);
/// Pointer to glUniform1f OpenGL function.
extern void (* const glUniform1f)(GLint, GLfloat);
/// Pointer to glUniform1fv OpenGL function.
extern void (* const glUniform1fv)(GLint, GLsizei, const GLfloat *);
/// Pointer to glUniform1i OpenGL function.
extern void (* const glUniform1i)(GLint, GLint);
/// Pointer to glUniform1iv OpenGL function.
extern void (* const glUniform1iv)(GLint, GLsizei, const GLint *);
/// Pointer to glUniform2f OpenGL function.
extern void (* const glUniform2f)(GLint, GLfloat, GLfloat);
/// Pointer to glUniform2fv OpenGL function.
extern void (* const glUniform2fv)(GLint, GLsizei, const GLfloat *);
/// Pointer to glUniform2i OpenGL function.
extern void (* const glUniform2i)(GLint, GLint, GLint);
/// Pointer to glUniform2iv OpenGL function.
extern void (* const glUniform2iv)(GLint, GLsizei, const GLint *);
/// Pointer to glUniform3f OpenGL function.
extern void (* const glUniform3f)(GLint, GLfloat, GLfloat, GLfloat);
/// Pointer to glUniform3fv OpenGL function.
extern void (* const glUniform3fv)(GLint, GLsizei, const GLfloat *);
/// Pointer to glUniform3i OpenGL function.
extern void (* const glUniform3i)(GLint, GLint, GLint, GLint);
/// Pointer to glUniform3iv OpenGL function.
extern void (* const glUniform3iv)(GLint, GLsizei, const GLint *);
/// Pointer to glUniform4f OpenGL function.
extern void (* const glUniform4f)(GLint, GLfloat, GLfloat, GLfloat, GLfloat);
/// Pointer to glUniform4fv OpenGL function.
extern void (* const glUniform4fv)(GLint, GLsizei, const GLfloat *);
/// Pointer to glUniform4i OpenGL function.
extern void (* const glUniform4i)(GLint, GLint, GLint, GLint, GLint);
/// Pointer to glUniform4iv OpenGL function.
extern void (* const glUniform4iv)(GLint, GLsizei, const GLint *);
/// Pointer to glUniformMatrix2fv OpenGL function.
extern void (* const glUniformMatrix2fv)(GLint, GLsizei, GLboolean, const GLfloat *);
/// Pointer to glUniformMatrix3fv OpenGL function.
extern void (* const glUniformMatrix3fv)(GLint, GLsizei, GLboolean, const GLfloat *);
/// Pointer to glUniformMatrix4fv OpenGL function.
extern void (* const glUniformMatrix4fv)(GLint, GLsizei, GLboolean, const GLfloat *);
/// Pointer to glUseProgram OpenGL function.
extern void (* const glUseProgram)(GLuint);
/// Pointer to glValidateProgram OpenGL function.
extern void (* const glValidateProgram)(GLuint);
/// Pointer to glVertexAttrib1f OpenGL function.
extern void (* const glVertexAttrib1f)(GLuint, GLfloat);
/// Pointer to glVertexAttrib1fv OpenGL function.
extern void (* const glVertexAttrib1fv)(GLuint, const GLfloat *);
/// Pointer to glVertexAttrib2f OpenGL function.
extern void (* const glVertexAttrib2f)(GLuint, GLfloat, GLfloat);
/// Pointer to glVertexAttrib2fv OpenGL function.
extern void (* const glVertexAttrib2fv)(GLuint, const GLfloat *);
/// Pointer to glVertexAttrib3f OpenGL function.
extern void (* const glVertexAttrib3f)(GLuint, GLfloat, GLfloat, GLfloat);
/// Pointer to glVertexAttrib3fv OpenGL function.
extern void (* const glVertexAttrib3fv)(GLuint, const GLfloat *);
/// Pointer to glVertexAttrib4f OpenGL function.
extern void (* const glVertexAttrib4f)(GLuint, GLfloat, GLfloat, GLfloat, GLfloat);
/// Pointer to glVertexAttrib4fv OpenGL function.
extern void (* const glVertexAttrib4fv)(GLuint, const GLfloat *);
/// Pointer to glVertexAttribPointer OpenGL function.
extern void (* const glVertexAttribPointer)(GLuint, GLint, GLenum, GLboolean, GLsizei, const void *);
/// Pointer to glViewport OpenGL function.
extern void (* const glViewport)(GLint, GLint, GLsizei, GLsizei);

#ifndef MBGL_USE_GLES2
/// Pointer to glDrawPixels OpenGL function.
extern void (* const glDrawPixels)(GLsizei, GLsizei, GLenum, GLenum, const GLvoid *);
/// Pointer to glGetDoublev OpenGL function.
extern void (* const glGetDoublev)(GLenum, GLdouble *);
/// Pointer to glPixelTransferf OpenGL function.
extern void (* const glPixelTransferf)(GLenum, GLfloat);
/// Pointer to glPixelZoom OpenGL function.
extern void (* const glPixelZoom)(GLfloat, GLfloat);
/// Pointer to glPointSize OpenGL function.
extern void (* const glPointSize)(GLfloat);
/// Pointer to glRasterPos4d OpenGL function.
extern void (* const glRasterPos4d)(GLdouble, GLdouble, GLdouble, GLdouble);
#endif

#ifndef NDEBUG
/// Check for GL errors and print on the console.
void glCheckError(const char *cmd, const char *file, int line);
#endif

}  // namespace platform
} // namespace mbgl