added objectLabel functions - untested

src/ACGL/OpenGL/glloaders/KHR_debug_emulator.cc

@@ -264,24 +264,158 @@ GLuint KHR_DEBUG_EMULATOR_GetDebugMessageLog(GLuint count, GLsizei bufsize, GLen
     return 1;
 }
 
-void KHR_DEBUG_EMULATOR_GetObjectLabel(GLenum identifier, GLuint name, GLsizei bufSize, GLsizei * length, GLchar * label)
+#ifndef GL_TRANSFORM_FEEDBACK
+#define GL_TRANSFORM_FEEDBACK 0x8E22
+#endif
+
+GLboolean isValidObjectLabelNamespace( GLenum e )
 {
-  KHR_DEBUG_EMULATOR_insertMissingFeatureError( "function not simulated yet - ignored" );
+    if (e == GL_BUFFER || e == GL_SHADER || e == GL_PROGRAM || e == GL_VERTEX_ARRAY
+            || e == GL_QUERY || e == GL_PROGRAM_PIPELINE || e == GL_TRANSFORM_FEEDBACK
+            || e == GL_SAMPLER || e == GL_TEXTURE || e == GL_RENDERBUFFER || e == GL_FRAMEBUFFER ) {
+        return true;
+    }
+
+    return false;
 }
 
-void KHR_DEBUG_EMULATOR_GetObjectPtrLabel(const void * ptr, GLsizei bufSize, GLsizei * length, GLchar * label)
+typedef struct ObjectLabel {
+    GLenum identifier;
+    GLuint name;
+    GLsizei length;
+    GLchar * label;
+
+    ObjectLabel *nextLabel;
+    ObjectLabel *previousLabel;
+} ObjectLabel;
+
+ObjectLabel *g_ObjectLabels = NULL;
+
+ObjectLabel *findObjectLabel(GLenum identifier, GLuint name)
 {
-  KHR_DEBUG_EMULATOR_insertMissingFeatureError( "function not simulated yet - ignored" );
+    ObjectLabel *l = g_ObjectLabels;
+
+    while ( l != NULL ) {
+
+        if (l->identifier == identifier && l->name == name) return l;
+
+        l = l->nextLabel;
+    }
+
+    // none found:
+    return NULL;
 }
 
+void insertObjectLabel(GLenum identifier, GLuint name, GLsizei length, const GLchar * label)
+{
+    ObjectLabel *l = (ObjectLabel *) malloc( sizeof(ObjectLabel) );
+
+    l->identifier = identifier;
+    l->name       = name;
+    l->length     = length;
+    l->label      = (GLchar *) malloc( length+1 );
+    l->nextLabel  = NULL;
+    l->previousLabel = NULL;
+
+    strncpy( l->label , label, length );
+    l->label[ length ] = 0;
+
+    // find last label
+    ObjectLabel *last = g_ObjectLabels;
+
+    if (last == NULL) {
+        // first label:
+        g_ObjectLabels = l;
+        return;
+    }
+
+    while ( last->nextLabel != NULL ) { last = last->nextLabel; }
+
+    last->nextLabel = l;
+    l->previousLabel = last;
+}
+
+//
+// glObjectLabel
+//
+// TODO: check if name is a valid object, emit an INVALID_VALUE otherwise
+//
 void KHR_DEBUG_EMULATOR_ObjectLabel(GLenum identifier, GLuint name, GLsizei length, const GLchar * label)
 {
-  KHR_DEBUG_EMULATOR_insertMissingFeatureError( "function not simulated yet - ignored" );
+    if ( !isValidObjectLabelNamespace(identifier) ) {
+        INSERT_API_ERROR( GL_INVALID_ENUM, "invalid enum in glObjectLabel" );
+        return;
+    }
+
+    if (length < 0) {
+        length = strlen( label );
+    }
+
+    if (length >= KHR_DEBUG_EMULATOR_MAX_LABEL_LENGTH) {
+        INSERT_API_ERROR( GL_INVALID_VALUE, "invalid value in glObjectLabel: label too long" );
+        return;
+    }
+
+    ObjectLabel *thelabel = findObjectLabel( identifier, name );
+
+    if (thelabel == NULL) {
+        insertObjectLabel( identifier, name, length, label );
+    } else {
+        // update
+        if (length == 0) {
+            // delete
+            ObjectLabel *pre = thelabel->previousLabel;
+            ObjectLabel *next = thelabel->nextLabel;
+
+            if (pre) pre->nextLabel = next;
+            if (next) next->previousLabel = pre;
+            if (!pre) g_ObjectLabels = next; // this was the first label
+
+            free( (void*) thelabel->label );
+            free( (void*) thelabel );
+        } else {
+            // update name & length:
+            if (length < 0) {
+                length = strlen( label );
+            }
+            free( (void*) thelabel->label );
+            thelabel->label      = (GLchar *) malloc( length+1 );
+            strncpy( thelabel->label , label, length );
+            thelabel->label[ length ] = 0;
+            thelabel->length = length;
+        }
+    }
 }
 
+void KHR_DEBUG_EMULATOR_GetObjectLabel(GLenum identifier, GLuint name, GLsizei bufSize, GLsizei * length, GLchar * label)
+{
+    ObjectLabel *thelabel = findObjectLabel( identifier, name );
+    if (thelabel == NULL) {
+        // label not found:
+        label[0] = 0;
+        *length = 0;
+        return;
+    }
+
+    size_t size = thelabel->length + 1;
+    if (bufSize-1 < size) size = bufSize-1;
+
+    if (label != NULL) {
+        strncpy( label, thelabel->label, size );
+        label[size] = 0;
+    }
+    *length = size;
+}
+
+
 void KHR_DEBUG_EMULATOR_ObjectPtrLabel(const void * ptr, GLsizei length, const GLchar * label)
 {
-  KHR_DEBUG_EMULATOR_insertMissingFeatureError( "function not simulated yet - ignored" );
+    KHR_DEBUG_EMULATOR_insertMissingFeatureError( "function not simulated yet - ignored" );
+}
+
+void KHR_DEBUG_EMULATOR_GetObjectPtrLabel(const void * ptr, GLsizei bufSize, GLsizei * length, GLchar * label)
+{
+    KHR_DEBUG_EMULATOR_insertMissingFeatureError( "function not simulated yet - ignored" );
 }
 
 struct DebugGroupDescription {