shadow & depth texture for eventual shadow maps.

include/glad/glad.h

@@ -1,22 +1,24 @@
 /*
 
-    OpenGL loader generated by glad 0.1.36 on Fri Oct 11 02:05:10 2024.
+    OpenGL loader generated by glad 0.1.36 on Mon Nov 25 21:47:40 2024.
 
     Language/Generator: C/C++
     Specification: gl
     APIs: gl=2.1
     Profile: compatibility
     Extensions:
-        GL_ARB_framebuffer_object
+        GL_ARB_depth_texture,
+        GL_ARB_framebuffer_object,
+        GL_ARB_shadow
     Loader: True
     Local files: False
     Omit khrplatform: False
     Reproducible: False
 
     Commandline:
-        --profile="compatibility" --api="gl=2.1" --generator="c" --spec="gl" --extensions="GL_ARB_framebuffer_object"
+        --profile="compatibility" --api="gl=2.1" --generator="c" --spec="gl" --extensions="GL_ARB_depth_texture,GL_ARB_framebuffer_object,GL_ARB_shadow"
     Online:
-        https://glad.dav1d.de/#profile=compatibility&language=c&specification=gl&loader=on&api=gl%3D2.1&extensions=GL_ARB_framebuffer_object
+        https://glad.dav1d.de/#profile=compatibility&language=c&specification=gl&loader=on&api=gl%3D2.1&extensions=GL_ARB_depth_texture&extensions=GL_ARB_framebuffer_object&extensions=GL_ARB_shadow
 */
 
 
@@ -2690,6 +2692,11 @@ typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X3FVPROC)(GLint location, GLsizei cou
 GLAPI PFNGLUNIFORMMATRIX4X3FVPROC glad_glUniformMatrix4x3fv;
 #define glUniformMatrix4x3fv glad_glUniformMatrix4x3fv
 #endif
+#define GL_DEPTH_COMPONENT16_ARB 0x81A5
+#define GL_DEPTH_COMPONENT24_ARB 0x81A6
+#define GL_DEPTH_COMPONENT32_ARB 0x81A7
+#define GL_TEXTURE_DEPTH_SIZE_ARB 0x884A
+#define GL_DEPTH_TEXTURE_MODE_ARB 0x884B
 #define GL_INVALID_FRAMEBUFFER_OPERATION 0x0506
 #define GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING 0x8210
 #define GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE 0x8211
@@ -2763,6 +2770,13 @@ GLAPI PFNGLUNIFORMMATRIX4X3FVPROC glad_glUniformMatrix4x3fv;
 #define GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE 0x8D56
 #define GL_MAX_SAMPLES 0x8D57
 #define GL_INDEX 0x8222
+#define GL_TEXTURE_COMPARE_MODE_ARB 0x884C
+#define GL_TEXTURE_COMPARE_FUNC_ARB 0x884D
+#define GL_COMPARE_R_TO_TEXTURE_ARB 0x884E
+#ifndef GL_ARB_depth_texture
+#define GL_ARB_depth_texture 1
+GLAPI int GLAD_GL_ARB_depth_texture;
+#endif
 #ifndef GL_ARB_framebuffer_object
 #define GL_ARB_framebuffer_object 1
 GLAPI int GLAD_GL_ARB_framebuffer_object;
@@ -2827,6 +2841,10 @@ typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURELAYERPROC)(GLenum target, GLenum
 GLAPI PFNGLFRAMEBUFFERTEXTURELAYERPROC glad_glFramebufferTextureLayer;
 #define glFramebufferTextureLayer glad_glFramebufferTextureLayer
 #endif
+#ifndef GL_ARB_shadow
+#define GL_ARB_shadow 1
+GLAPI int GLAD_GL_ARB_shadow;
+#endif
 
 #ifdef __cplusplus
 }

src/glad.c

@@ -1,22 +1,24 @@
 /*
 
-    OpenGL loader generated by glad 0.1.36 on Fri Oct 11 02:05:10 2024.
+    OpenGL loader generated by glad 0.1.36 on Mon Nov 25 21:47:40 2024.
 
     Language/Generator: C/C++
     Specification: gl
     APIs: gl=2.1
     Profile: compatibility
     Extensions:
-        GL_ARB_framebuffer_object
+        GL_ARB_depth_texture,
+        GL_ARB_framebuffer_object,
+        GL_ARB_shadow
     Loader: True
     Local files: False
     Omit khrplatform: False
     Reproducible: False
 
     Commandline:
-        --profile="compatibility" --api="gl=2.1" --generator="c" --spec="gl" --extensions="GL_ARB_framebuffer_object"
+        --profile="compatibility" --api="gl=2.1" --generator="c" --spec="gl" --extensions="GL_ARB_depth_texture,GL_ARB_framebuffer_object,GL_ARB_shadow"
     Online:
-        https://glad.dav1d.de/#profile=compatibility&language=c&specification=gl&loader=on&api=gl%3D2.1&extensions=GL_ARB_framebuffer_object
+        https://glad.dav1d.de/#profile=compatibility&language=c&specification=gl&loader=on&api=gl%3D2.1&extensions=GL_ARB_depth_texture&extensions=GL_ARB_framebuffer_object&extensions=GL_ARB_shadow
 */
 
 #include <stdio.h>
@@ -814,7 +816,9 @@ PFNGLWINDOWPOS3IPROC glad_glWindowPos3i = NULL;
 PFNGLWINDOWPOS3IVPROC glad_glWindowPos3iv = NULL;
 PFNGLWINDOWPOS3SPROC glad_glWindowPos3s = NULL;
 PFNGLWINDOWPOS3SVPROC glad_glWindowPos3sv = NULL;
+int GLAD_GL_ARB_depth_texture = 0;
 int GLAD_GL_ARB_framebuffer_object = 0;
+int GLAD_GL_ARB_shadow = 0;
 PFNGLISRENDERBUFFERPROC glad_glIsRenderbuffer = NULL;
 PFNGLBINDRENDERBUFFERPROC glad_glBindRenderbuffer = NULL;
 PFNGLDELETERENDERBUFFERSPROC glad_glDeleteRenderbuffers = NULL;
@@ -1435,7 +1439,9 @@ static void load_GL_ARB_framebuffer_object(GLADloadproc load) {
 }
 static int find_extensionsGL(void) {
 	if (!get_exts()) return 0;
+	GLAD_GL_ARB_depth_texture = has_ext("GL_ARB_depth_texture");
 	GLAD_GL_ARB_framebuffer_object = has_ext("GL_ARB_framebuffer_object");
+	GLAD_GL_ARB_shadow = has_ext("GL_ARB_shadow");
 	free_exts();
 	return 1;
 }