[core] move OpenGL debug information printing to core

1 files changed, 31 insertions, 12 deletions

diff --git a/src/mbgl/gl/extension.cpp b/src/mbgl/gl/extension.cpp
index ee94e8ecfd..40a2096f4f 100644
--- a/src/mbgl/gl/extension.cpp
+++ b/src/mbgl/gl/extension.cpp
@@ -1,9 +1,11 @@
 #include <mbgl/gl/extension.hpp>
 #include <mbgl/gl/gl.hpp>
+#include <mbgl/platform/log.hpp>
 
 #include <mutex>
 #include <string>
 #include <vector>
+#include <cstring>
 
 namespace mbgl {
 namespace gl {
@@ -24,20 +26,37 @@ ExtensionFunctionBase::ExtensionFunctionBase(std::initializer_list<Probe> probes
 
 static std::once_flag initializeExtensionsOnce;
 
+const char* getGLString(GLenum name) {
+    return reinterpret_cast<const char*>(MBGL_CHECK_ERROR(glGetString(name)));
+}
+
 void InitializeExtensions(glProc (*getProcAddress)(const char*)) {
     std::call_once(initializeExtensionsOnce, [getProcAddress] {
-        const char* extensionsPtr =
-            reinterpret_cast<const char*>(MBGL_CHECK_ERROR(glGetString(GL_EXTENSIONS)));
-
-        if (!extensionsPtr)
-            return;
-
-        const std::string extensions = extensionsPtr;
-        for (auto fn : detail::extensionFunctions()) {
-            for (auto probe : fn.second) {
-                if (extensions.find(probe.first) != std::string::npos) {
-                    *fn.first = getProcAddress(probe.second);
-                    break;
+#ifndef NDEBUG
+        if (const char* vendor = getGLString(GL_VENDOR)) {
+            mbgl::Log::Info(mbgl::Event::OpenGL, "Vendor: %s", vendor);
+        }
+        if (const char* renderer = getGLString(GL_RENDERER)) {
+            mbgl::Log::Info(mbgl::Event::OpenGL, "Renderer: %s", renderer);
+        }
+        if (const char* version = getGLString(GL_VERSION)) {
+            mbgl::Log::Info(mbgl::Event::OpenGL, "Version: %s", version);
+        }
+        if (const char* shaderVersion = getGLString(GL_SHADING_LANGUAGE_VERSION)) {
+            mbgl::Log::Info(mbgl::Event::OpenGL, "Shading Language Version: %s", shaderVersion);
+        }
+#endif
+
+        if (const char* extensions = getGLString(GL_EXTENSIONS)) {
+#ifndef NDEBUG
+            mbgl::Log::Info(mbgl::Event::OpenGL, "Extensions: %s", extensions);
+#endif
+            for (auto fn : detail::extensionFunctions()) {
+                for (auto probe : fn.second) {
+                    if (strstr(extensions, probe.first) != nullptr) {
+                        *fn.first = getProcAddress(probe.second);
+                        break;
+                    }
                 }
             }
         }