Update glad, add debug extensions

deps/glad.c

@@ -1,3 +1,25 @@
+/*
+
+    OpenGL loader generated by glad 0.1.12a0 on Thu Sep 22 01:08:06 2016.
+
+    Language/Generator: C/C++
+    Specification: gl
+    APIs: gl=3.2
+    Profile: compatibility
+    Extensions:
+        GL_ARB_debug_output,
+        GL_ARB_multisample,
+        GL_ARB_robustness
+    Loader: False
+    Local files: False
+    Omit khrplatform: False
+
+    Commandline:
+        --profile="compatibility" --api="gl=3.2" --generator="c" --spec="gl" --no-loader --extensions="GL_ARB_debug_output,GL_ARB_multisample,GL_ARB_robustness"
+    Online:
+        http://glad.dav1d.de/#profile=compatibility&language=c&specification=gl&api=gl%3D3.2&extensions=GL_ARB_debug_output&extensions=GL_ARB_multisample&extensions=GL_ARB_robustness
+*/
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -5,14 +27,59 @@
 
 struct gladGLversionStruct GLVersion;
 
+#if defined(GL_ES_VERSION_3_0) || defined(GL_VERSION_3_0)
+#define _GLAD_IS_SOME_NEW_VERSION 1
+#endif
+
+static int max_loaded_major;
+static int max_loaded_minor;
+
+static const char *exts = NULL;
+static int num_exts_i = 0;
+static const char **exts_i = NULL;
+
+static int get_exts(void) {
+#ifdef _GLAD_IS_SOME_NEW_VERSION
+    if(max_loaded_major < 3) {
+#endif
+        exts = (const char *)glGetString(GL_EXTENSIONS);
+#ifdef _GLAD_IS_SOME_NEW_VERSION
+    } else {
+        int index;
+
+        num_exts_i = 0;
+        glGetIntegerv(GL_NUM_EXTENSIONS, &num_exts_i);
+        if (num_exts_i > 0) {
+            exts_i = (const char **)realloc((void *)exts_i, num_exts_i * sizeof *exts_i);
+        }
+
+        if (exts_i == NULL) {
+            return 0;
+        }
+
+        for(index = 0; index < num_exts_i; index++) {
+            exts_i[index] = (const char*)glGetStringi(GL_EXTENSIONS, index);
+        }
+    }
+#endif
+    return 1;
+}
+
+static void free_exts(void) {
+    if (exts_i != NULL) {
+        free((char **)exts_i);
+        exts_i = NULL;
+    }
+}
+
 static int has_ext(const char *ext) {
-#if defined(GL_VERSION_3_0) || defined(GL_ES_VERSION_3_0)
-    if(GLVersion.major < 3 || glGetStringi == NULL) {
+#ifdef _GLAD_IS_SOME_NEW_VERSION
+    if(max_loaded_major < 3) {
 #endif
         const char *extensions;
         const char *loc;
         const char *terminator;
-        extensions = (const char*) glGetString(GL_EXTENSIONS);
+        extensions = exts;
         if(extensions == NULL || ext == NULL) {
             return 0;
         }
@@ -30,13 +97,14 @@ static int has_ext(const char *ext) {
             }
             extensions = terminator;
         }
-#if defined(GL_VERSION_3_0) || defined(GL_ES_VERSION_3_0)
+#ifdef _GLAD_IS_SOME_NEW_VERSION
     } else {
-        GLint num_exts, index;
+        int index;
 
-        glGetIntegerv(GL_NUM_EXTENSIONS, &num_exts);
-        for(index = 0; index < num_exts; index++) {
-            if(strcmp((const char*) glGetStringi(GL_EXTENSIONS, index), ext) == 0) {
+        for(index = 0; index < num_exts_i; index++) {
+            const char *e = exts_i[index];
+
+            if(strcmp(e, ext) == 0) {
                 return 1;
             }
         }
@@ -316,7 +384,7 @@ PFNGLRASTERPOS3FPROC glad_glRasterPos3f;
 PFNGLCOMPRESSEDTEXIMAGE3DPROC glad_glCompressedTexImage3D;
 PFNGLTEXCOORD3FPROC glad_glTexCoord3f;
 PFNGLDELETESYNCPROC glad_glDeleteSync;
-PFNGLTEXCOORD3DPROC glad_glTexCoord3d;
+PFNGLCOPYTEXSUBIMAGE3DPROC glad_glCopyTexSubImage3D;
 PFNGLTEXIMAGE2DMULTISAMPLEPROC glad_glTexImage2DMultisample;
 PFNGLGETVERTEXATTRIBIVPROC glad_glGetVertexAttribiv;
 PFNGLMULTIDRAWELEMENTSPROC glad_glMultiDrawElements;
@@ -363,7 +431,7 @@ PFNGLVIEWPORTPROC glad_glViewport;
 PFNGLUNIFORM1UIVPROC glad_glUniform1uiv;
 PFNGLTRANSFORMFEEDBACKVARYINGSPROC glad_glTransformFeedbackVaryings;
 PFNGLINDEXDVPROC glad_glIndexdv;
-PFNGLCOPYTEXSUBIMAGE3DPROC glad_glCopyTexSubImage3D;
+PFNGLTEXCOORD3DPROC glad_glTexCoord3d;
 PFNGLTEXCOORD3IVPROC glad_glTexCoord3iv;
 PFNGLVERTEXATTRIBI3IPROC glad_glVertexAttribI3i;
 PFNGLCLEARDEPTHPROC glad_glClearDepth;
@@ -723,8 +791,12 @@ PFNGLFRONTFACEPROC glad_glFrontFace;
 PFNGLGETBOOLEANI_VPROC glad_glGetBooleani_v;
 PFNGLCLEARBUFFERUIVPROC glad_glClearBufferuiv;
 int GLAD_GL_ARB_robustness;
+int GLAD_GL_ARB_debug_output;
 int GLAD_GL_ARB_multisample;
-int GLAD_GL_EXT_separate_specular_color;
+PFNGLDEBUGMESSAGECONTROLARBPROC glad_glDebugMessageControlARB;
+PFNGLDEBUGMESSAGEINSERTARBPROC glad_glDebugMessageInsertARB;
+PFNGLDEBUGMESSAGECALLBACKARBPROC glad_glDebugMessageCallbackARB;
+PFNGLGETDEBUGMESSAGELOGARBPROC glad_glGetDebugMessageLogARB;
 PFNGLSAMPLECOVERAGEARBPROC glad_glSampleCoverageARB;
 PFNGLGETGRAPHICSRESETSTATUSARBPROC glad_glGetGraphicsResetStatusARB;
 PFNGLGETNTEXIMAGEARBPROC glad_glGetnTexImageARB;
@@ -1448,6 +1520,13 @@ static void load_GL_VERSION_3_2(GLADloadproc load) {
 	glad_glGetMultisamplefv = (PFNGLGETMULTISAMPLEFVPROC)load("glGetMultisamplefv");
 	glad_glSampleMaski = (PFNGLSAMPLEMASKIPROC)load("glSampleMaski");
 }
+static void load_GL_ARB_debug_output(GLADloadproc load) {
+	if(!GLAD_GL_ARB_debug_output) return;
+	glad_glDebugMessageControlARB = (PFNGLDEBUGMESSAGECONTROLARBPROC)load("glDebugMessageControlARB");
+	glad_glDebugMessageInsertARB = (PFNGLDEBUGMESSAGEINSERTARBPROC)load("glDebugMessageInsertARB");
+	glad_glDebugMessageCallbackARB = (PFNGLDEBUGMESSAGECALLBACKARBPROC)load("glDebugMessageCallbackARB");
+	glad_glGetDebugMessageLogARB = (PFNGLGETDEBUGMESSAGELOGARBPROC)load("glGetDebugMessageLogARB");
+}
 static void load_GL_ARB_multisample(GLADloadproc load) {
 	if(!GLAD_GL_ARB_multisample) return;
 	glad_glSampleCoverageARB = (PFNGLSAMPLECOVERAGEARBPROC)load("glSampleCoverageARB");
@@ -1475,10 +1554,13 @@ static void load_GL_ARB_robustness(GLADloadproc load) {
 	glad_glGetnHistogramARB = (PFNGLGETNHISTOGRAMARBPROC)load("glGetnHistogramARB");
 	glad_glGetnMinmaxARB = (PFNGLGETNMINMAXARBPROC)load("glGetnMinmaxARB");
 }
-static void find_extensionsGL(void) {
-	GLAD_GL_EXT_separate_specular_color = has_ext("GL_EXT_separate_specular_color");
+static int find_extensionsGL(void) {
+	if (!get_exts()) return 0;
+	GLAD_GL_ARB_debug_output = has_ext("GL_ARB_debug_output");
 	GLAD_GL_ARB_multisample = has_ext("GL_ARB_multisample");
 	GLAD_GL_ARB_robustness = has_ext("GL_ARB_robustness");
+	free_exts();
+	return 1;
 }
 
 static void find_coreGL(void) {
@@ -1516,6 +1598,7 @@ static void find_coreGL(void) {
 #endif
 
     GLVersion.major = major; GLVersion.minor = minor;
+    max_loaded_major = major; max_loaded_minor = minor;
 	GLAD_GL_VERSION_1_0 = (major == 1 && minor >= 0) || major > 1;
 	GLAD_GL_VERSION_1_1 = (major == 1 && minor >= 1) || major > 1;
 	GLAD_GL_VERSION_1_2 = (major == 1 && minor >= 2) || major > 1;
@@ -1527,6 +1610,10 @@ static void find_coreGL(void) {
 	GLAD_GL_VERSION_3_0 = (major == 3 && minor >= 0) || major > 3;
 	GLAD_GL_VERSION_3_1 = (major == 3 && minor >= 1) || major > 3;
 	GLAD_GL_VERSION_3_2 = (major == 3 && minor >= 2) || major > 3;
+	if (GLVersion.major > 3 || (GLVersion.major >= 3 && GLVersion.minor >= 2)) {
+		max_loaded_major = 3;
+		max_loaded_minor = 2;
+	}
 }
 
 int gladLoadGLLoader(GLADloadproc load) {
@@ -1547,7 +1634,8 @@ int gladLoadGLLoader(GLADloadproc load) {
 	load_GL_VERSION_3_1(load);
 	load_GL_VERSION_3_2(load);
 
-	find_extensionsGL();
+	if (!find_extensionsGL()) return 0;
+	load_GL_ARB_debug_output(load);
 	load_GL_ARB_multisample(load);
 	load_GL_ARB_robustness(load);
 	return GLVersion.major != 0 || GLVersion.minor != 0;