Add ktx

2026-06-14 19:09:18 +01:00
parent 14bd1a9271
commit 13fa90a0e9
3958 changed files with 999286 additions and 4 deletions
@@ -0,0 +1,56 @@
+/* -*- tab-width: 4; -*- */
+/* vi: set sw=2 ts=4 expandtab textwidth=70: */
+
+/*
+ * Copyright 2017-2020 Mark Callow.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @internal
+ * @file
+ * @~English
+ *
+ * @brief Declare pointers for OpenGL {,ES} functions.
+ *
+ * Dynamically retrieving pointers avoids apps or shared library builds having to link with OpenGL {,ES}
+ * and avoids the need for compiling different versions of the libary for different OpenGL {,ES} versions.
+ */
+
+#ifndef _GL_FUNCS_H_
+#define _GL_FUNCS_H_
+
+#undef GL_GLEXT_PROTOTYPES // Just to be sure.
+#include "GL/glcorearb.h"
+#include "ktx.h"
+
+extern ktx_error_code_e ktxLoadOpenGLLibrary(void);
+
+#define GL_FUNCTION(type, fun, required) type fun;
+
+extern struct glFuncPtrs {
+#include "gl_funclist.inl"
+} gl;
+
+#undef GL_FUNCTION
+
+#if !defined(NO_SHORTCUTS)
+// Macros to allow standard, i.e always present functions, to be called
+// by their prototype names.
+#define glBindTexture gl.glBindTexture
+#define glCompressedTexImage2D gl.glCompressedTexImage2D
+#define glCompressedTexSubImage2D gl.glCompressedTexSubImage2D
+#define glDeleteTextures gl.glDeleteTextures
+#define glGenTextures gl.glGenTextures
+#define glGetError gl.glGetError
+#define glGetIntegerv gl.glGetIntegerv
+#define glGetString(x) (const char*)gl.glGetString(x)
+#define glPixelStorei gl.glPixelStorei
+#define glTexImage2D gl.glTexImage2D
+#define glTexSubImage2D gl.glTexSubImage2D
+#define glTexParameteri gl.glTexParameteri
+#define glTexParameteriv gl.glTexParameteriv
+#endif
+
+#endif /* _GL_FUNCS_H_ */
+