Split mgl into separate files.

5 files changed, 232 insertions, 164 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ab5114529..8e5fd17af 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -847,6 +847,8 @@ SET(SRCS
     resources/map/objectslayer.h
     render/mgl.cpp
     render/mgl.h
+    render/mgldefines.h
+    render/mgltypes.h
     render/mobileopenglgraphics.cpp
     render/mobileopenglgraphics.h
     input/mouseinput.h
diff --git a/src/Makefile.am b/src/Makefile.am
index 6ed8775ec..32fb4ef13 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -965,6 +965,8 @@ manaplus_SOURCES += gui/widgets/avatarlistbox.cpp \
 	      resources/map/objectslayer.h \
 	      render/mgl.cpp \
 	      render/mgl.h \
+	      render/mgldefines.h \
+	      render/mgltypes.h \
 	      render/mobileopenglgraphics.cpp \
 	      render/mobileopenglgraphics.h \
 	      input/mouseinput.h \
diff --git a/src/render/mgl.h b/src/render/mgl.h
index d4dd33bcc..2213458bb 100644
--- a/src/render/mgl.h
+++ b/src/render/mgl.h
@@ -24,168 +24,11 @@
 #include "main.h"
 #ifdef USE_OPENGL
 
-#ifdef ANDROID
-#include <GLES/gl.h>
-#include <GLES/glext.h>
-#define APIENTRY GL_APIENTRY
-#else
-#ifndef USE_SDL2
-#define GL_GLEXT_PROTOTYPES 1
-#endif
-#include <SDL_opengl.h>
-#include <GL/glext.h>
-#endif
-
-#define GL_NUM_EXTENSIONS                 0x821D
-#define GL_DEPTH_ATTACHMENT               0x8D00
-#define GL_COLOR_ATTACHMENT0              0x8CE0
-#define GL_FRAMEBUFFER                    0x8D40
-#define GL_RENDERBUFFER                   0x8D41
-
-#ifndef GL_COMPRESSED_RGBA_ARB
-#define GL_COMPRESSED_RGBA_ARB            0x84EE
-#define GL_COMPRESSED_RGBA_S3TC_DXT5_EXT  0x83F3
-#define GL_COMPRESSED_RGBA_FXT1_3DFX      0x86B1
-#endif
-#ifndef GL_MAX_ELEMENTS_VERTICES
-#define GL_MAX_ELEMENTS_VERTICES          0x80E8
-#define GL_MAX_ELEMENTS_INDICES           0x80E9
-#endif
-
-#ifndef GL_DEBUG_OUTPUT
-#define GL_DEBUG_OUTPUT_SYNCHRONOUS       0x8242
-#define GL_DEBUG_OUTPUT                   0x92E0
-#define GL_DEBUG_SOURCE_API               0x8246
-#define GL_DEBUG_SOURCE_WINDOW_SYSTEM     0x8247
-#define GL_DEBUG_SOURCE_SHADER_COMPILER   0x8248
-#define GL_DEBUG_SOURCE_THIRD_PARTY       0x8249
-#define GL_DEBUG_SOURCE_APPLICATION       0x824A
-#define GL_DEBUG_SOURCE_OTHER             0x824B
-#define GL_DEBUG_TYPE_ERROR               0x824C
-#define GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR 0x824D
-#define GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR  0x824E
-#define GL_DEBUG_TYPE_PORTABILITY         0x824F
-#define GL_DEBUG_TYPE_PERFORMANCE         0x8250
-#define GL_DEBUG_TYPE_OTHER               0x8251
-#define GL_DEBUG_TYPE_MARKER              0x8268
-#define GL_DEBUG_SEVERITY_NOTIFICATION    0x826B
-#define GL_DEBUG_SEVERITY_HIGH            0x9146
-#define GL_DEBUG_SEVERITY_MEDIUM          0x9147
-#define GL_DEBUG_SEVERITY_LOW             0x9148
-#endif
-
-#ifndef GL_EXT_debug_label
-#define GL_PROGRAM_PIPELINE_OBJECT_EXT    0x8A4F
-#define GL_PROGRAM_OBJECT_EXT             0x8B40
-#define GL_SHADER_OBJECT_EXT              0x8B48
-#define GL_BUFFER_OBJECT_EXT              0x9151
-#define GL_QUERY_OBJECT_EXT               0x9153
-#define GL_VERTEX_ARRAY_OBJECT_EXT        0x9154
-#endif
-
-#ifndef GL_ARRAY_BUFFER
-#define GL_ARRAY_BUFFER                   0x8892
-#define GL_ELEMENT_ARRAY_BUFFER           0x8893
-#endif
-
-#ifndef GL_STREAM_DRAW
-#define GL_STREAM_DRAW                    0x88E0
-#define GL_STATIC_DRAW                    0x88E4
-#define GL_DYNAMIC_DRAW                   0x88E8
-#endif
+#include "render/mgldefines.h"
+#include "render/mgltypes.h"
 
 #define defNameE(name) extern name##_t m##name
 
-typedef void (APIENTRY *glGenRenderbuffers_t)(GLsizei, GLuint *);
-typedef void (APIENTRY *glBindRenderbuffer_t)(GLenum target,
-    GLuint renderbuffer);
-typedef void (APIENTRY *glRenderbufferStorage_t)(GLenum target,
-    GLenum internalformat, GLsizei width, GLsizei height);
-typedef void (APIENTRY *glGenFramebuffers_t)(GLsizei n, GLuint *framebuffers);
-typedef void (APIENTRY *glBindFramebuffer_t)(GLenum target,
-    GLuint framebuffer);
-typedef void (APIENTRY *glFramebufferTexture2D_t)(GLenum target,
-    GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-typedef void (APIENTRY *glFramebufferRenderbuffer_t)(GLenum target,
-    GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
-typedef void (APIENTRY *glDeleteFramebuffers_t) (GLsizei, const GLuint *);
-typedef void (APIENTRY *glDeleteRenderbuffers_t) (GLsizei, const GLuint *);
-typedef const GLubyte *(APIENTRY *glGetStringi_t) (GLenum, GLuint);
-typedef void (APIENTRY *glGenSamplers_t) (GLsizei count, GLuint *samplers);
-typedef void (APIENTRY *glDeleteSamplers_t)
-    (GLsizei count, const GLuint * samplers);
-typedef void (APIENTRY *glBindSampler_t) (GLuint unit, GLuint sampler);
-typedef void (APIENTRY *glSamplerParameteri_t)
-    (GLuint sampler, GLenum pname, GLint param);
-typedef void (APIENTRY *glDebugMessageControl_t) (GLenum source, GLenum type,
-    GLenum severity, GLsizei count, const GLuint* ids, GLboolean enabled);
-typedef void (APIENTRY *glFrameTerminator_t) (void);
-typedef void (APIENTRY *glLabelObject_t) (GLenum type, GLuint object,
-    GLsizei length, const GLchar *label);
-typedef void (APIENTRY *glGetObjectLabel_t) (GLenum type, GLuint object,
-    GLsizei bufSize, GLsizei *length, GLchar *label);
-typedef void (APIENTRY *glInsertEventMarker_t)
-    (GLsizei length, const char *marker);
-typedef void (APIENTRY *glPushGroupMarker_t)
-    (GLsizei length, const char *marker);
-typedef void (APIENTRY *glPopGroupMarker_t) (void);
-typedef void (APIENTRY *glGenVertexArrays_t) (GLsizei n, GLuint *arrays);
-typedef void (APIENTRY *glBindVertexArray_t) (GLuint array);
-typedef void (APIENTRY *glDeleteVertexArrays_t) (GLsizei n, GLuint *arrays);
-typedef void (APIENTRY *glVertexAttribPointer_t) (GLuint index, GLint size,
-    GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
-typedef void (APIENTRY *glEnableVertexAttribArray_t) (GLuint index);
-typedef void (APIENTRY *glDisableVertexAttribArray_t) (GLuint index);
-typedef void (APIENTRY *glGenBuffers_t) (GLsizei n, GLuint *buffers);
-typedef void (APIENTRY *glDeleteBuffers_t) (GLsizei n, GLuint *buffers);
-typedef void (APIENTRY *glBindBuffer_t) (GLenum target, GLuint buffer);
-typedef void (APIENTRY *glBufferData_t) (GLenum target, GLsizeiptr size,
-    const GLvoid *data, GLenum usage);
-typedef void (APIENTRY *glCreateShader_t) (GLenum shaderType);
-typedef void (APIENTRY *glDeleteShader_t) (GLenum shader);
-typedef void (APIENTRY *glGetShaderiv_t) (GLuint shader,
-    GLenum pname, GLint *params);
-typedef void (APIENTRY *glGetShaderInfoLog_t) (GLuint shader,
-    GLsizei maxLength, GLsizei *length, GLchar *infoLog);
-typedef void (APIENTRY *glGetShaderSource_t) (GLuint shader,
-    GLsizei bufSize, GLsizei *length, GLchar *source);
-typedef void (APIENTRY *glShaderSource_t) (GLuint shader,
-    GLsizei count, const GLchar **string, const GLint *length);
-typedef void (APIENTRY *glCompileShader_t) (GLuint shader);
-typedef void (APIENTRY *glLinkProgram_t) (GLuint program);
-typedef void (APIENTRY *glDeleteProgram_t) (GLuint program);
-typedef GLuint (APIENTRY *glCreateProgram_t) (void);
-typedef void (APIENTRY *glAttachShader_t) (GLuint program, GLuint shader);
-typedef void (APIENTRY *glDetachShader_t) (GLuint program, GLuint shader);
-typedef void (APIENTRY *glGetAttachedShaders_t) (GLuint program,
-    GLsizei maxCount, GLsizei *count, GLuint *shaders);
-typedef void (APIENTRY *glGetUniformLocation_t) (GLuint program,
-    const GLchar *name);
-typedef void (APIENTRY *glGetActiveUniform_t) (GLuint program, GLuint index,
-    GLsizei bufSize, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
-typedef void (APIENTRY *glGetProgramiv_t) (GLuint program,
-    GLenum pname, GLint *params);
-typedef GLint (APIENTRY *glBindFragDataLocation_t) (GLuint program,
-    GLuint colorNumber, const char *name);
-typedef void (APIENTRY *glUseProgram_t) (GLuint program);
-typedef void (APIENTRY *glValidateProgram_t) (GLuint program);
-typedef GLint (APIENTRY *glGetAttribLocation_t) (GLuint program,
-    const GLchar *name);
-typedef void (APIENTRY *glUniform1f_t) (GLint location, GLfloat v0);
-typedef void (APIENTRY *glUniform2f_t) (GLint location,
-    GLfloat v0, GLfloat v1);
-typedef void (APIENTRY *glUniform3f_t) (GLint location,
-    GLfloat v0, GLfloat v1, GLfloat v2);
-typedef void (APIENTRY *glUniform4f_t) (GLint location,
-    GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
-
-// callback
-typedef void (APIENTRY *GLDEBUGPROC_t) (GLenum source, GLenum type, GLuint id,
-    GLenum severity, GLsizei length, const GLchar *message, GLvoid *userParam);
-
-typedef void (APIENTRY *glDebugMessageCallback_t) (GLDEBUGPROC_t callback,
-    const void *userParam);
-
 defNameE(glGenRenderbuffers);
 defNameE(glBindRenderbuffer);
 defNameE(glRenderbufferStorage);
@@ -244,12 +87,8 @@ defNameE(glUniform3f);
 defNameE(glUniform4f);
 
 #ifdef WIN32
-typedef const char* (APIENTRY * wglGetExtensionsString_t) (HDC hdc);
-
 defNameE(wglGetExtensionsString);
-#else
-#define CALLBACK
 #endif
 
-#endif
+#endif  // USE_OPENGL
 #endif  // RENDER_MGL_H
diff --git a/src/render/mgldefines.h b/src/render/mgldefines.h
new file mode 100644
index 000000000..7a65932eb
--- /dev/null
+++ b/src/render/mgldefines.h
@@ -0,0 +1,86 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2012-2014  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef RENDER_MGLDEFINES_H
+#define RENDER_MGLDEFINES_H
+
+#ifdef USE_OPENGL
+
+#define GL_NUM_EXTENSIONS                 0x821D
+#define GL_DEPTH_ATTACHMENT               0x8D00
+#define GL_COLOR_ATTACHMENT0              0x8CE0
+#define GL_FRAMEBUFFER                    0x8D40
+#define GL_RENDERBUFFER                   0x8D41
+
+#ifndef GL_COMPRESSED_RGBA_ARB
+#define GL_COMPRESSED_RGBA_ARB            0x84EE
+#define GL_COMPRESSED_RGBA_S3TC_DXT5_EXT  0x83F3
+#define GL_COMPRESSED_RGBA_FXT1_3DFX      0x86B1
+#endif
+#ifndef GL_MAX_ELEMENTS_VERTICES
+#define GL_MAX_ELEMENTS_VERTICES          0x80E8
+#define GL_MAX_ELEMENTS_INDICES           0x80E9
+#endif
+
+#ifndef GL_DEBUG_OUTPUT
+#define GL_DEBUG_OUTPUT_SYNCHRONOUS       0x8242
+#define GL_DEBUG_OUTPUT                   0x92E0
+#define GL_DEBUG_SOURCE_API               0x8246
+#define GL_DEBUG_SOURCE_WINDOW_SYSTEM     0x8247
+#define GL_DEBUG_SOURCE_SHADER_COMPILER   0x8248
+#define GL_DEBUG_SOURCE_THIRD_PARTY       0x8249
+#define GL_DEBUG_SOURCE_APPLICATION       0x824A
+#define GL_DEBUG_SOURCE_OTHER             0x824B
+#define GL_DEBUG_TYPE_ERROR               0x824C
+#define GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR 0x824D
+#define GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR  0x824E
+#define GL_DEBUG_TYPE_PORTABILITY         0x824F
+#define GL_DEBUG_TYPE_PERFORMANCE         0x8250
+#define GL_DEBUG_TYPE_OTHER               0x8251
+#define GL_DEBUG_TYPE_MARKER              0x8268
+#define GL_DEBUG_SEVERITY_NOTIFICATION    0x826B
+#define GL_DEBUG_SEVERITY_HIGH            0x9146
+#define GL_DEBUG_SEVERITY_MEDIUM          0x9147
+#define GL_DEBUG_SEVERITY_LOW             0x9148
+#endif
+
+#ifndef GL_EXT_debug_label
+#define GL_PROGRAM_PIPELINE_OBJECT_EXT    0x8A4F
+#define GL_PROGRAM_OBJECT_EXT             0x8B40
+#define GL_SHADER_OBJECT_EXT              0x8B48
+#define GL_BUFFER_OBJECT_EXT              0x9151
+#define GL_QUERY_OBJECT_EXT               0x9153
+#define GL_VERTEX_ARRAY_OBJECT_EXT        0x9154
+#endif
+
+#ifndef GL_ARRAY_BUFFER
+#define GL_ARRAY_BUFFER                   0x8892
+#define GL_ELEMENT_ARRAY_BUFFER           0x8893
+#endif
+
+#ifndef GL_STREAM_DRAW
+#define GL_STREAM_DRAW                    0x88E0
+#define GL_STATIC_DRAW                    0x88E4
+#define GL_DYNAMIC_DRAW                   0x88E8
+#endif
+
+#endif  // USE_OPENGL
+
+#endif  // RENDER_MGLDEFINES_H
diff --git a/src/render/mgltypes.h b/src/render/mgltypes.h
new file mode 100644
index 000000000..8e5cbe40d
--- /dev/null
+++ b/src/render/mgltypes.h
@@ -0,0 +1,139 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2012-2014  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef RENDER_MGLTYPES_H
+#define RENDER_MGLTYPES_H
+
+#include "main.h"
+#ifdef USE_OPENGL
+
+#include "render/mgldefines.h"
+
+#ifdef ANDROID
+#include <GLES/gl.h>
+#include <GLES/glext.h>
+#define APIENTRY GL_APIENTRY
+#else
+#ifndef USE_SDL2
+#define GL_GLEXT_PROTOTYPES 1
+#endif
+#include <SDL_opengl.h>
+#include <GL/glext.h>
+#endif
+
+typedef void (APIENTRY *glGenRenderbuffers_t)(GLsizei, GLuint *);
+typedef void (APIENTRY *glBindRenderbuffer_t)(GLenum target,
+    GLuint renderbuffer);
+typedef void (APIENTRY *glRenderbufferStorage_t)(GLenum target,
+    GLenum internalformat, GLsizei width, GLsizei height);
+typedef void (APIENTRY *glGenFramebuffers_t)(GLsizei n, GLuint *framebuffers);
+typedef void (APIENTRY *glBindFramebuffer_t)(GLenum target,
+    GLuint framebuffer);
+typedef void (APIENTRY *glFramebufferTexture2D_t)(GLenum target,
+    GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+typedef void (APIENTRY *glFramebufferRenderbuffer_t)(GLenum target,
+    GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
+typedef void (APIENTRY *glDeleteFramebuffers_t) (GLsizei, const GLuint *);
+typedef void (APIENTRY *glDeleteRenderbuffers_t) (GLsizei, const GLuint *);
+typedef const GLubyte *(APIENTRY *glGetStringi_t) (GLenum, GLuint);
+typedef void (APIENTRY *glGenSamplers_t) (GLsizei count, GLuint *samplers);
+typedef void (APIENTRY *glDeleteSamplers_t)
+    (GLsizei count, const GLuint * samplers);
+typedef void (APIENTRY *glBindSampler_t) (GLuint unit, GLuint sampler);
+typedef void (APIENTRY *glSamplerParameteri_t)
+    (GLuint sampler, GLenum pname, GLint param);
+typedef void (APIENTRY *glDebugMessageControl_t) (GLenum source, GLenum type,
+    GLenum severity, GLsizei count, const GLuint* ids, GLboolean enabled);
+typedef void (APIENTRY *glFrameTerminator_t) (void);
+typedef void (APIENTRY *glLabelObject_t) (GLenum type, GLuint object,
+    GLsizei length, const GLchar *label);
+typedef void (APIENTRY *glGetObjectLabel_t) (GLenum type, GLuint object,
+    GLsizei bufSize, GLsizei *length, GLchar *label);
+typedef void (APIENTRY *glInsertEventMarker_t)
+    (GLsizei length, const char *marker);
+typedef void (APIENTRY *glPushGroupMarker_t)
+    (GLsizei length, const char *marker);
+typedef void (APIENTRY *glPopGroupMarker_t) (void);
+typedef void (APIENTRY *glGenVertexArrays_t) (GLsizei n, GLuint *arrays);
+typedef void (APIENTRY *glBindVertexArray_t) (GLuint array);
+typedef void (APIENTRY *glDeleteVertexArrays_t) (GLsizei n, GLuint *arrays);
+typedef void (APIENTRY *glVertexAttribPointer_t) (GLuint index, GLint size,
+    GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
+typedef void (APIENTRY *glEnableVertexAttribArray_t) (GLuint index);
+typedef void (APIENTRY *glDisableVertexAttribArray_t) (GLuint index);
+typedef void (APIENTRY *glGenBuffers_t) (GLsizei n, GLuint *buffers);
+typedef void (APIENTRY *glDeleteBuffers_t) (GLsizei n, GLuint *buffers);
+typedef void (APIENTRY *glBindBuffer_t) (GLenum target, GLuint buffer);
+typedef void (APIENTRY *glBufferData_t) (GLenum target, GLsizeiptr size,
+    const GLvoid *data, GLenum usage);
+typedef void (APIENTRY *glCreateShader_t) (GLenum shaderType);
+typedef void (APIENTRY *glDeleteShader_t) (GLenum shader);
+typedef void (APIENTRY *glGetShaderiv_t) (GLuint shader,
+    GLenum pname, GLint *params);
+typedef void (APIENTRY *glGetShaderInfoLog_t) (GLuint shader,
+    GLsizei maxLength, GLsizei *length, GLchar *infoLog);
+typedef void (APIENTRY *glGetShaderSource_t) (GLuint shader,
+    GLsizei bufSize, GLsizei *length, GLchar *source);
+typedef void (APIENTRY *glShaderSource_t) (GLuint shader,
+    GLsizei count, const GLchar **string, const GLint *length);
+typedef void (APIENTRY *glCompileShader_t) (GLuint shader);
+typedef void (APIENTRY *glLinkProgram_t) (GLuint program);
+typedef void (APIENTRY *glDeleteProgram_t) (GLuint program);
+typedef GLuint (APIENTRY *glCreateProgram_t) (void);
+typedef void (APIENTRY *glAttachShader_t) (GLuint program, GLuint shader);
+typedef void (APIENTRY *glDetachShader_t) (GLuint program, GLuint shader);
+typedef void (APIENTRY *glGetAttachedShaders_t) (GLuint program,
+    GLsizei maxCount, GLsizei *count, GLuint *shaders);
+typedef void (APIENTRY *glGetUniformLocation_t) (GLuint program,
+    const GLchar *name);
+typedef void (APIENTRY *glGetActiveUniform_t) (GLuint program, GLuint index,
+    GLsizei bufSize, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
+typedef void (APIENTRY *glGetProgramiv_t) (GLuint program,
+    GLenum pname, GLint *params);
+typedef GLint (APIENTRY *glBindFragDataLocation_t) (GLuint program,
+    GLuint colorNumber, const char *name);
+typedef void (APIENTRY *glUseProgram_t) (GLuint program);
+typedef void (APIENTRY *glValidateProgram_t) (GLuint program);
+typedef GLint (APIENTRY *glGetAttribLocation_t) (GLuint program,
+    const GLchar *name);
+typedef void (APIENTRY *glUniform1f_t) (GLint location, GLfloat v0);
+typedef void (APIENTRY *glUniform2f_t) (GLint location,
+    GLfloat v0, GLfloat v1);
+typedef void (APIENTRY *glUniform3f_t) (GLint location,
+    GLfloat v0, GLfloat v1, GLfloat v2);
+typedef void (APIENTRY *glUniform4f_t) (GLint location,
+    GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
+
+// callback
+typedef void (APIENTRY *GLDEBUGPROC_t) (GLenum source, GLenum type, GLuint id,
+    GLenum severity, GLsizei length, const GLchar *message, GLvoid *userParam);
+
+typedef void (APIENTRY *glDebugMessageCallback_t) (GLDEBUGPROC_t callback,
+    const void *userParam);
+
+
+#ifdef WIN32
+typedef const char* (APIENTRY * wglGetExtensionsString_t) (HDC hdc);
+#else
+#define CALLBACK
+#endif
+
+#endif  // USE_OPENGL
+#endif  // RENDER_MGLTYPES_H