Expose shader functions via ogx_get_proc_address()

CMakeLists.txt

@@ -47,6 +47,7 @@ add_library(${TARGET} STATIC
     src/selection.c
     src/shader.c
     src/shader.h
+    src/shader_functions.h
     src/state.h
     src/stencil.c
     src/stencil.h

src/shader.c

@@ -588,3 +588,6 @@ void _ogx_shader_setup_draw(const OgxDrawData *draw_data)
             s->setup_draw(SHADER_TO_INT(s), draw_data, s->user_data);
     }
 }
+
+#define INCLUDED_FROM_SHADER_C
+#include "shader_functions.h"

src/shader.h

@@ -61,6 +61,8 @@ typedef struct {
 
 typedef struct _OgxVertexAttribState OgxVertexAttribState;
 
+extern OgxFunctions _ogx_shader_functions;
+
 void _ogx_shader_setup_draw(const OgxDrawData *draw_data);
 
 #endif /* OPENGX_SHADER_H */

src/shader_functions.h

@@ -0,0 +1,65 @@
+/*****************************************************************************
+Copyright (c) 2025  Alberto Mardegan ([email protected])
+All rights reserved.
+
+Attention! Contains pieces of code from others such as Mesa and GRRLib
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. Neither the name of copyright holders nor the names of its
+   contributors may be used to endorse or promote products derived
+   from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL COPYRIGHT HOLDERS OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+*****************************************************************************/
+
+#ifndef INCLUDED_FROM_SHADER_C
+#error "This file can only be included by shader.c"
+#endif
+
+#define PROC(name) { #name, name }
+static const OgxProcMap s_proc_map[] = {
+    PROC(glAttachShader),
+    PROC(glAttachShader),
+    //PROC(glBindAttribLocation),
+    PROC(glCompileShader),
+    PROC(glCreateProgram),
+    PROC(glCreateShader),
+    PROC(glDeleteShader),
+    PROC(glDisableVertexAttribArray),
+    PROC(glEnableVertexAttribArray),
+    PROC(glGetAttribLocation),
+    PROC(glGetProgramiv),
+    PROC(glGetShaderiv),
+    PROC(glGetUniformLocation),
+    PROC(glGetVertexAttribiv),
+    PROC(glIsProgram),
+    PROC(glIsShader),
+    PROC(glLinkProgram),
+    PROC(glShaderSource),
+    PROC(glUniformMatrix4fv),
+    PROC(glUseProgram),
+    PROC(glVertexAttribPointer),
+};
+#define NUM_PROCS (sizeof(s_proc_map) / sizeof(s_proc_map[0]))
+
+OgxFunctions _ogx_shader_functions = {
+    NUM_PROCS,
+    s_proc_map,
+};