GL: Add error checking function

This is to ease the debugging process on Apple GL implementation.

1 files changed, 35 insertions, 0 deletions

diff --git a/source/blender/gpu/opengl/gl_context.cc b/source/blender/gpu/opengl/gl_context.cc
index 11f313f639b..2ac361d28e1 100644
--- a/source/blender/gpu/opengl/gl_context.cc
+++ b/source/blender/gpu/opengl/gl_context.cc
@@ -22,6 +22,7 @@
  */
 
 #include "BLI_assert.h"
+#include "BLI_system.h"
 #include "BLI_utildefines.h"
 
 #include "GPU_framebuffer.h"
@@ -238,3 +239,37 @@ void GLContext::framebuffer_unregister(struct GPUFrameBuffer *fb)
 }
 
 /** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Error Checking
+ *
+ * This is only useful for implementation that does not support the KHR_debug extension.
+ * \{ */
+
+void GLContext::check_error(const char *info)
+{
+  GLenum error = glGetError();
+
+#define ERROR_CASE(err) \
+  case err: \
+    fprintf(stderr, "GL error: %s : %s\n", #err, info); \
+    BLI_system_backtrace(stderr); \
+    break;
+
+  switch (error) {
+    ERROR_CASE(GL_INVALID_ENUM)
+    ERROR_CASE(GL_INVALID_VALUE)
+    ERROR_CASE(GL_INVALID_OPERATION)
+    ERROR_CASE(GL_INVALID_FRAMEBUFFER_OPERATION)
+    ERROR_CASE(GL_OUT_OF_MEMORY)
+    ERROR_CASE(GL_STACK_UNDERFLOW)
+    ERROR_CASE(GL_STACK_OVERFLOW)
+    case GL_NO_ERROR:
+      break;
+    default:
+      fprintf(stderr, "Unknown GL error: %x : %s", error, info);
+      break;
+  }
+}
+
+/** \} */