botch GL support.

src/OpenGLSupport.h

@@ -0,0 +1,112 @@
+/*
+    Copyright 2016-2019 Arisotura
+
+    This file is part of melonDS.
+
+    melonDS 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 3 of the License, or (at your option)
+    any later version.
+
+    melonDS 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 melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef OPENGLSUPPORT_H
+#define OPENGLSUPPORT_H
+
+#include <stdio.h>
+#include <GL/gl.h>
+#include <GL/glext.h>
+
+#include "Platform.h"
+
+
+// here, have some macro magic
+// we at the melonDS company really love macro magic
+// also, suggestion to the fine folks who write the OpenGL headers:
+// pls make the type names follow the same capitalization as their
+// matching function names, so this is more convenient to deal with
+
+#define DECLPROC(type, name)  \
+    PFN##type##PROC name ;
+
+#define DECLPROC_EXT(type, name)  \
+    extern PFN##type##PROC name ;
+
+#define LOADPROC(type, name)  \
+    name = (PFN##type##PROC)Platform::GL_GetProcAddress(#name); \
+    if (!name) { printf("OpenGL: " #name " not found\n"); return false; }
+
+
+// if you need more OpenGL functions, add them to the macronator here
+// TODO: handle conditionally loading certain functions for different GL versions
+
+#define DO_PROCLIST(func) \
+    func(GLGENFRAMEBUFFERS, glGenFramebuffers); \
+    func(GLDELETEFRAMEBUFFERS, glDeleteFramebuffers); \
+    func(GLBINDFRAMEBUFFER, glBindFramebuffer); \
+    func(GLFRAMEBUFFERTEXTURE, glFramebufferTexture); \
+    func(GLBLITFRAMEBUFFER, glBlitFramebuffer); \
+     \
+    func(GLGENBUFFERS, glGenBuffers); \
+    func(GLDELETEBUFFERS, glDeleteBuffers); \
+    func(GLBINDBUFFER, glBindBuffer); \
+    func(GLMAPBUFFER, glMapBuffer); \
+    func(GLMAPBUFFERRANGE, glMapBufferRange); \
+    func(GLUNMAPBUFFER, glUnmapBuffer); \
+    func(GLBUFFERDATA, glBufferData); \
+    func(GLBUFFERSUBDATA, glBufferSubData); \
+    func(GLBINDBUFFERBASE, glBindBufferBase); \
+     \
+    func(GLGENVERTEXARRAYS, glGenVertexArrays); \
+    func(GLDELETEVERTEXARRAYS, glDeleteVertexArrays); \
+    func(GLBINDVERTEXARRAY, glBindVertexArray); \
+    func(GLENABLEVERTEXATTRIBARRAY, glEnableVertexAttribArray); \
+    func(GLDISABLEVERTEXATTRIBARRAY, glDisableVertexAttribArray); \
+    func(GLVERTEXATTRIBPOINTER, glVertexAttribPointer); \
+    func(GLVERTEXATTRIBIPOINTER, glVertexAttribIPointer); \
+     \
+    func(GLCREATESHADER, glCreateShader); \
+    func(GLSHADERSOURCE, glShaderSource); \
+    func(GLCOMPILESHADER, glCompileShader); \
+    func(GLCREATEPROGRAM, glCreateProgram); \
+    func(GLATTACHSHADER, glAttachShader); \
+    func(GLLINKPROGRAM, glLinkProgram); \
+    func(GLUSEPROGRAM, glUseProgram); \
+    func(GLGETSHADERIV, glGetShaderiv); \
+    func(GLGETSHADERINFOLOG, glGetShaderInfoLog); \
+    func(GLGETPROGRAMIV, glGetProgramiv); \
+    func(GLGETPROGRAMINFOLOG, glGetProgramInfoLog); \
+    func(GLDELETESHADER, glDeleteShader); \
+    func(GLDELETEPROGRAM, glDeleteProgram); \
+     \
+    func(GLUNIFORM1UI, glUniform1ui); \
+    func(GLUNIFORM4UI, glUniform4ui); \
+    func(GLUNIFORMBLOCKBINDING, glUniformBlockBinding); \
+     \
+    func(GLACTIVETEXTURE, glActiveTexture); \
+    func(GLBINDIMAGETEXTURE, glBindImageTexture); \
+     \
+    func(GLDRAWBUFFERS, glDrawBuffers); \
+     \
+    func(GLBLENDFUNCSEPARATEI, glBlendFuncSeparatei); \
+    func(GLBLENDEQUATIONSEPARATEI, glBlendEquationSeparatei); \
+     \
+    func(GLCOLORMASKI, glColorMaski); \
+     \
+    func(GLMEMORYBARRIER, glMemoryBarrier); \
+     \
+    func(GLGETSTRINGI, glGetStringi); \
+
+
+DO_PROCLIST(DECLPROC_EXT);
+
+
+bool OpenGL_Init();
+
+#endif // OPENGLSUPPORT_H