added files

2026-09-06 21:15:01 +02:00
parent 64d277d9d1
commit 3a2a671325
55 changed files with 5597 additions and 0 deletions
@@ -0,0 +1,146 @@
+#pragma once
+
+// -----------------------------------------------------------------------
+// GLFunctions
+//
+// Linux distributions only ship GL/gl.h with legacy (<=1.1/1.2) function
+// declarations; everything from OpenGL 1.5 onward (VAOs/VBOs, GLSL
+// shaders, etc.) must be resolved at runtime as function pointers. This
+// is a small, self-contained loader for exactly the subset of OpenGL 3.3
+// core functions this project's renderer uses. It is intentionally
+// separate from Dear ImGui's own bundled loader (imgui_impl_opengl3_loader.h)
+// to avoid the multiple-definition problems that occur when two GL
+// loaders are mixed in the same program - see the comment at the top of
+// that file for details.
+//
+// Usage: call planetarium::gl::loadGLFunctions() exactly once, right
+// after the GLFW OpenGL context has been made current and before any
+// other GL call in the project's own rendering code.
+// -----------------------------------------------------------------------
+
+#include <GL/gl.h>
+#include <cstddef>
+
+#ifndef GL_ARRAY_BUFFER
+#define GL_ARRAY_BUFFER 0x8892
+#endif
+#ifndef GL_ELEMENT_ARRAY_BUFFER
+#define GL_ELEMENT_ARRAY_BUFFER 0x8893
+#endif
+#ifndef GL_STATIC_DRAW
+#define GL_STATIC_DRAW 0x88E4
+#endif
+#ifndef GL_DYNAMIC_DRAW
+#define GL_DYNAMIC_DRAW 0x88E8
+#endif
+#ifndef GL_FRAGMENT_SHADER
+#define GL_FRAGMENT_SHADER 0x8B30
+#endif
+#ifndef GL_VERTEX_SHADER
+#define GL_VERTEX_SHADER 0x8B31
+#endif
+#ifndef GL_COMPILE_STATUS
+#define GL_COMPILE_STATUS 0x8B81
+#endif
+#ifndef GL_LINK_STATUS
+#define GL_LINK_STATUS 0x8B82
+#endif
+#ifndef GL_TEXTURE0
+#define GL_TEXTURE0 0x84C0
+#endif
+#ifndef GL_PROGRAM_POINT_SIZE
+#define GL_PROGRAM_POINT_SIZE 0x8642
+#endif
+#ifndef GL_CLAMP_TO_EDGE
+#define GL_CLAMP_TO_EDGE 0x812F
+#endif
+#ifndef GL_MULTISAMPLE
+#define GL_MULTISAMPLE 0x809D
+#endif
+#ifndef GL_MAJOR_VERSION
+#define GL_MAJOR_VERSION 0x821B
+#endif
+#ifndef GL_MINOR_VERSION
+#define GL_MINOR_VERSION 0x821C
+#endif
+
+typedef char GLchar;
+typedef ptrdiff_t GLsizeiptr;
+typedef ptrdiff_t GLintptr;
+
+namespace planetarium::gl {
+
+using PFNGLGENVERTEXARRAYS = void (*)(GLsizei, GLuint*);
+using PFNGLBINDVERTEXARRAY = void (*)(GLuint);
+using PFNGLDELETEVERTEXARRAYS = void (*)(GLsizei, const GLuint*);
+using PFNGLGENBUFFERS = void (*)(GLsizei, GLuint*);
+using PFNGLBINDBUFFER = void (*)(GLenum, GLuint);
+using PFNGLBUFFERDATA = void (*)(GLenum, GLsizeiptr, const void*, GLenum);
+using PFNGLDELETEBUFFERS = void (*)(GLsizei, const GLuint*);
+using PFNGLVERTEXATTRIBPOINTER = void (*)(GLuint, GLint, GLenum, GLboolean, GLsizei, const void*);
+using PFNGLENABLEVERTEXATTRIBARRAY = void (*)(GLuint);
+using PFNGLDISABLEVERTEXATTRIBARRAY = void (*)(GLuint);
+
+using PFNGLCREATESHADER = GLuint (*)(GLenum);
+using PFNGLSHADERSOURCE = void (*)(GLuint, GLsizei, const GLchar* const*, const GLint*);
+using PFNGLCOMPILESHADER = void (*)(GLuint);
+using PFNGLGETSHADERIV = void (*)(GLuint, GLenum, GLint*);
+using PFNGLGETSHADERINFOLOG = void (*)(GLuint, GLsizei, GLsizei*, GLchar*);
+using PFNGLDELETESHADER = void (*)(GLuint);
+using PFNGLCREATEPROGRAM = GLuint (*)();
+using PFNGLATTACHSHADER = void (*)(GLuint, GLuint);
+using PFNGLLINKPROGRAM = void (*)(GLuint);
+using PFNGLGETPROGRAMIV = void (*)(GLuint, GLenum, GLint*);
+using PFNGLGETPROGRAMINFOLOG = void (*)(GLuint, GLsizei, GLsizei*, GLchar*);
+using PFNGLUSEPROGRAM = void (*)(GLuint);
+using PFNGLDELETEPROGRAM = void (*)(GLuint);
+
+using PFNGLGETUNIFORMLOCATION = GLint (*)(GLuint, const GLchar*);
+using PFNGLUNIFORMMATRIX4FV = void (*)(GLint, GLsizei, GLboolean, const GLfloat*);
+using PFNGLUNIFORM3FV = void (*)(GLint, GLsizei, const GLfloat*);
+using PFNGLUNIFORM4FV = void (*)(GLint, GLsizei, const GLfloat*);
+using PFNGLUNIFORM1F = void (*)(GLint, GLfloat);
+using PFNGLUNIFORM1I = void (*)(GLint, GLint);
+using PFNGLACTIVETEXTURE = void (*)(GLenum);
+using PFNGLGENERATEMIPMAP = void (*)(GLenum);
+
+extern PFNGLGENVERTEXARRAYS glGenVertexArrays;
+extern PFNGLBINDVERTEXARRAY glBindVertexArray;
+extern PFNGLDELETEVERTEXARRAYS glDeleteVertexArrays;
+extern PFNGLGENBUFFERS glGenBuffers;
+extern PFNGLBINDBUFFER glBindBuffer;
+extern PFNGLBUFFERDATA glBufferData;
+extern PFNGLDELETEBUFFERS glDeleteBuffers;
+extern PFNGLVERTEXATTRIBPOINTER glVertexAttribPointer;
+extern PFNGLENABLEVERTEXATTRIBARRAY glEnableVertexAttribArray;
+extern PFNGLDISABLEVERTEXATTRIBARRAY glDisableVertexAttribArray;
+
+extern PFNGLCREATESHADER glCreateShader;
+extern PFNGLSHADERSOURCE glShaderSource;
+extern PFNGLCOMPILESHADER glCompileShader;
+extern PFNGLGETSHADERIV glGetShaderiv;
+extern PFNGLGETSHADERINFOLOG glGetShaderInfoLog;
+extern PFNGLDELETESHADER glDeleteShader;
+extern PFNGLCREATEPROGRAM glCreateProgram;
+extern PFNGLATTACHSHADER glAttachShader;
+extern PFNGLLINKPROGRAM glLinkProgram;
+extern PFNGLGETPROGRAMIV glGetProgramiv;
+extern PFNGLGETPROGRAMINFOLOG glGetProgramInfoLog;
+extern PFNGLUSEPROGRAM glUseProgram;
+extern PFNGLDELETEPROGRAM glDeleteProgram;
+
+extern PFNGLGETUNIFORMLOCATION glGetUniformLocation;
+extern PFNGLUNIFORMMATRIX4FV glUniformMatrix4fv;
+extern PFNGLUNIFORM3FV glUniform3fv;
+extern PFNGLUNIFORM4FV glUniform4fv;
+extern PFNGLUNIFORM1F glUniform1f;
+extern PFNGLUNIFORM1I glUniform1i;
+extern PFNGLACTIVETEXTURE glActiveTexture;
+extern PFNGLGENERATEMIPMAP glGenerateMipmap;
+
+// Resolves every function pointer above via glfwGetProcAddress. Must be
+// called once, after glfwMakeContextCurrent(). Returns false if any
+// required entry point could not be resolved.
+bool loadGLFunctions();
+
+}  // namespace planetarium::gl