Merge pull request #137 from kiryl/master

Implement bindings for debug output feature

2 files changed, 115 insertions, 0 deletions

diff --git a/debugoutput.go b/debugoutput.go
new file mode 100644
index 0000000..122f22b
--- /dev/null
+++ b/debugoutput.go
@@ -0,0 +1,93 @@
+// Copyright 2012 The go-gl Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gl
+
+import "unsafe"
+
+// #include "gl.h"
+//
+// void goDebugCB(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, char *message);
+//
+// static inline void debugProcCB(GLenum source,
+//	GLenum type,
+//	GLuint id,
+//	GLenum severity,
+//	GLsizei length,
+//	const GLchar* message,
+//	void* userParam)
+// {
+//	goDebugCB(source, type, id, severity, length, (char *)message);
+// }
+//
+// static inline void glDebugMessageCB(void)
+// {
+//	glDebugMessageCallbackARB(debugProcCB, NULL);
+// }
+//
+// /*
+//  * Depending on glew version 'message' could be 'GLchar*' or 'char*' which
+//  * causes problems in more strict Go type system. Let's work it around in C
+//  */
+// static inline void __glDebugMessageInsert(GLenum source, GLenum type, GLuint id, GLenum severity,
+//	GLsizei length, const char *message)
+// {
+//	glDebugMessageInsertARB(source, type, id, severity, length, message);
+// }
+//
+// static inline void GetDebugMessageLog(GLuint count, GLsizei bufSize, GLenum *sources,
+//	GLenum *types, GLuint *ids, GLenum *severities, GLsizei *lengths, char *messageLog)
+// {
+//	glGetDebugMessageLogARB(count, bufSize, sources, types, ids, severities, lengths, messageLog);
+// }
+import "C"
+
+type debugProc func(source GLenum, typ GLenum, id uint, severity GLenum, message string)
+
+var debugCB debugProc
+
+//export goDebugCB
+func goDebugCB(source GLenum, typ GLenum, id GLuint, severity GLenum, length GLsizei, message *C.char) {
+	debugCB(source, typ, uint(id), severity, C.GoStringN(message, C.int(length)))
+}
+
+func DebugMessageCallback(cbfunc debugProc) {
+	if cbfunc == nil {
+		C.glDebugMessageCallbackARB(nil, nil)
+	} else {
+		debugCB = cbfunc
+		C.glDebugMessageCB()
+	}
+}
+
+func DebugMessageControl(source GLenum, typ GLenum, severity GLenum, ids []uint, enabled bool) {
+	C.glDebugMessageControlARB(C.GLenum(source), C.GLenum(typ), C.GLenum(severity),
+		C.GLsizei(len(ids)), (*C.GLuint)(unsafe.Pointer(&ids)), glBool(enabled))
+}
+
+func DebugMessageInsert(source GLenum, typ GLenum, id uint, severity GLenum, message string) {
+	C.__glDebugMessageInsert(C.GLenum(source), C.GLenum(typ), C.GLuint(id), C.GLenum(severity),
+		C.GLsizei(len(message)), C.CString(message))
+}
+
+func GetNextDebugMessage() (msg string, source GLenum, typ GLenum, id uint, severity GLenum) {
+	length := []int32{0}
+	GetIntegerv(DEBUG_NEXT_LOGGED_MESSAGE_LENGTH, length)
+	if length[0] < 1 {
+		msg = ""
+		return
+	}
+
+	buf := C.malloc(C.size_t(length[0]))
+	defer C.free(buf)
+
+	_id := []GLuint{0}
+	C.GetDebugMessageLog(C.GLuint(1), C.GLsizei(length[0]),
+		(*C.GLenum)(&source), (*C.GLenum)(&typ), (*C.GLuint)(&_id[0]),
+		(*C.GLenum)(&severity), nil, (*C.char)(buf))
+
+	id = uint(_id[0])
+	msg = C.GoString((*C.char)(buf))
+	return
+}
diff --git a/gl_defs.go b/gl_defs.go
index 26d17a3..075af1b 100644
--- a/gl_defs.go
+++ b/gl_defs.go
@@ -261,6 +261,26 @@ const (
 	DECAL                                         = C.GL_DECAL
 	DECR_WRAP                                     = C.GL_DECR_WRAP
 	DECR                                          = C.GL_DECR
+	DEBUG_OUTPUT_SYNCHRONOUS                      = C.GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB
+	DEBUG_NEXT_LOGGED_MESSAGE_LENGTH              = C.GL_DEBUG_NEXT_LOGGED_MESSAGE_LENGTH_ARB
+	DEBUG_CALLBACK_FUNCTION                       = C.GL_DEBUG_CALLBACK_FUNCTION_ARB
+	DEBUG_CALLBACK_USER_PARAM                     = C.GL_DEBUG_CALLBACK_USER_PARAM_ARB
+	DEBUG_SOURCE_API                              = C.GL_DEBUG_SOURCE_API_ARB
+	DEBUG_SOURCE_WINDOW_SYSTEM                    = C.GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB
+	DEBUG_SOURCE_SHADER_COMPILER                  = C.GL_DEBUG_SOURCE_SHADER_COMPILER_ARB
+	DEBUG_SOURCE_THIRD_PARTY                      = C.GL_DEBUG_SOURCE_THIRD_PARTY_ARB
+	DEBUG_SOURCE_APPLICATION                      = C.GL_DEBUG_SOURCE_APPLICATION_ARB
+	DEBUG_SOURCE_OTHER                            = C.GL_DEBUG_SOURCE_OTHER_ARB
+	DEBUG_TYPE_ERROR                              = C.GL_DEBUG_TYPE_ERROR_ARB
+	DEBUG_TYPE_DEPRECATED_BEHAVIOR                = C.GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB
+	DEBUG_TYPE_UNDEFINED_BEHAVIOR                 = C.GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB
+	DEBUG_TYPE_PORTABILITY                        = C.GL_DEBUG_TYPE_PORTABILITY_ARB
+	DEBUG_TYPE_PERFORMANCE                        = C.GL_DEBUG_TYPE_PERFORMANCE_ARB
+	DEBUG_TYPE_OTHER                              = C.GL_DEBUG_TYPE_OTHER_ARB
+	DEBUG_LOGGED_MESSAGES                         = C.GL_DEBUG_LOGGED_MESSAGES_ARB
+	DEBUG_SEVERITY_HIGH                           = C.GL_DEBUG_SEVERITY_HIGH_ARB
+	DEBUG_SEVERITY_MEDIUM                         = C.GL_DEBUG_SEVERITY_MEDIUM_ARB
+	DEBUG_SEVERITY_LOW                            = C.GL_DEBUG_SEVERITY_LOW_ARB
 	DELETE_STATUS                                 = C.GL_DELETE_STATUS
 	DEPTH24_STENCIL8                              = C.GL_DEPTH24_STENCIL8
 	DEPTH32F_STENCIL8                             = C.GL_DEPTH32F_STENCIL8
@@ -608,6 +628,8 @@ const (
 	MAX_CONVOLUTION_HEIGHT                        = C.GL_MAX_CONVOLUTION_HEIGHT
 	MAX_CONVOLUTION_WIDTH                         = C.GL_MAX_CONVOLUTION_WIDTH
 	MAX_CUBE_MAP_TEXTURE_SIZE                     = C.GL_MAX_CUBE_MAP_TEXTURE_SIZE
+	MAX_DEBUG_LOGGED_MESSAGES                     = C.GL_MAX_DEBUG_LOGGED_MESSAGES_ARB
+	MAX_DEBUG_MESSAGE_LENGTH                      = C.GL_MAX_DEBUG_MESSAGE_LENGTH_ARB
 	MAX_DEPTH_TEXTURE_SAMPLES                     = C.GL_MAX_DEPTH_TEXTURE_SAMPLES
 	MAX_DRAW_BUFFERS                              = C.GL_MAX_DRAW_BUFFERS
 	MAX_ELEMENTS_INDICES                          = C.GL_MAX_ELEMENTS_INDICES