GPUCapabilities: Isolate GL memory statistics

This is part of the Vulkan task T68990

This is a simple cleanup.

1 files changed, 27 insertions, 0 deletions

diff --git a/source/blender/gpu/opengl/gl_context.cc b/source/blender/gpu/opengl/gl_context.cc
index ec6cc9e6159..ecf74a1993d 100644
--- a/source/blender/gpu/opengl/gl_context.cc
+++ b/source/blender/gpu/opengl/gl_context.cc
@@ -277,3 +277,30 @@ void GLContext::vao_cache_unregister(GLVaoCache *cache)
 }
 
 /** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Memory statistics
+ * \{ */
+
+void GLContext::memory_statistics_get(int *r_total_mem, int *r_free_mem)
+{
+  /* TODO(merwin): use Apple's platform API to get this info. */
+  if (GLEW_NVX_gpu_memory_info) {
+    /* Teturned value in Kb. */
+    glGetIntegerv(GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX, r_total_mem);
+    glGetIntegerv(GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, r_free_mem);
+  }
+  else if (GLEW_ATI_meminfo) {
+    int stats[4];
+    glGetIntegerv(GL_TEXTURE_FREE_MEMORY_ATI, stats);
+
+    *r_total_mem = 0;
+    *r_free_mem = stats[0]; /* Total memory free in the pool. */
+  }
+  else {
+    *r_total_mem = 0;
+    *r_free_mem = 0;
+  }
+}
+
+/** \} */