From e9bc11f7121dbe373b0cbe5779ee6a12d824492c Mon Sep 17 00:00:00 2001
From: Romain Guy <romainguy@google.com>
Date: Thu, 23 May 2013 12:47:26 -0700
Subject: Add PerfHUD ES profiling capabilities

The eglGetSystemTimeNV extension can be used to enable profiling
in PerfHUD ES. When the delta of two calls to eglGetSystemTimeNV
equals 0, we now cancels display lists updates. This allows the
tool to redraw the same frame several times in a row to run its
analysis.

For better results profiling should only be attempted after
setting viewroot.profile_rendering to true using adb shell
setprop.

Change-Id: I02e3c237418004cff8d6cb0b9a37126efae44c90
---
 libs/hwui/Extensions.cpp | 80 +++++++++++++++++++++++++++++-------------------
 1 file changed, 49 insertions(+), 31 deletions(-)

(limited to 'libs/hwui/Extensions.cpp')

diff --git a/libs/hwui/Extensions.cpp b/libs/hwui/Extensions.cpp
index 51aec8d36715..eefdb84db6d8 100644
--- a/libs/hwui/Extensions.cpp
+++ b/libs/hwui/Extensions.cpp
@@ -14,6 +14,16 @@
  * limitations under the License.
  */
 
+#define LOG_TAG "OpenGLRenderer"
+
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include <utils/Log.h>
+
 #include "Debug.h"
 #include "Extensions.h"
 
@@ -40,33 +50,22 @@ namespace uirenderer {
 ///////////////////////////////////////////////////////////////////////////////
 
 Extensions::Extensions(): Singleton<Extensions>() {
-    const char* buffer = (const char*) glGetString(GL_EXTENSIONS);
-    const char* current = buffer;
-    const char* head = current;
-    EXT_LOGD("Available GL extensions:");
-    do {
-        head = strchr(current, ' ');
-        String8 s(current, head ? head - current : strlen(current));
-        if (s.length()) {
-            mExtensionList.add(s);
-            EXT_LOGD("  %s", s.string());
-        }
-        current = head + 1;
-    } while (head);
-
-    mHasNPot = hasExtension("GL_OES_texture_npot");
-    mHasFramebufferFetch = hasExtension("GL_NV_shader_framebuffer_fetch");
-    mHasDiscardFramebuffer = hasExtension("GL_EXT_discard_framebuffer");
-    mHasDebugMarker = hasExtension("GL_EXT_debug_marker");
-    mHasDebugLabel = hasExtension("GL_EXT_debug_label");
-    mHasTiledRendering = hasExtension("GL_QCOM_tiled_rendering");
-    mHas1BitStencil = hasExtension("GL_OES_stencil1");
-    mHas4BitStencil = hasExtension("GL_OES_stencil4");
-
-    mExtensions = strdup(buffer);
+    // Query GL extensions
+    findExtensions((const char*) glGetString(GL_EXTENSIONS), mGlExtensionList);
+    mHasNPot = hasGlExtension("GL_OES_texture_npot");
+    mHasFramebufferFetch = hasGlExtension("GL_NV_shader_framebuffer_fetch");
+    mHasDiscardFramebuffer = hasGlExtension("GL_EXT_discard_framebuffer");
+    mHasDebugMarker = hasGlExtension("GL_EXT_debug_marker");
+    mHasDebugLabel = hasGlExtension("GL_EXT_debug_label");
+    mHasTiledRendering = hasGlExtension("GL_QCOM_tiled_rendering");
+    mHas1BitStencil = hasGlExtension("GL_OES_stencil1");
+    mHas4BitStencil = hasGlExtension("GL_OES_stencil4");
+
+    // Query EGL extensions
+    findExtensions(eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS), mEglExtensionList);
+    mHasNvSystemTime = hasEglExtension("EGL_NV_system_time");
 
     const char* version = (const char*) glGetString(GL_VERSION);
-    mVersion = strdup(version);
 
     // Section 6.1.5 of the OpenGL ES specification indicates the GL version
     // string strictly follows this format:
@@ -88,22 +87,41 @@ Extensions::Extensions(): Singleton<Extensions>() {
 }
 
 Extensions::~Extensions() {
-   free(mExtensions);
-   free(mVersion);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // Methods
 ///////////////////////////////////////////////////////////////////////////////
 
-bool Extensions::hasExtension(const char* extension) const {
+bool Extensions::hasGlExtension(const char* extension) const {
    const String8 s(extension);
-   return mExtensionList.indexOf(s) >= 0;
+   return mGlExtensionList.indexOf(s) >= 0;
+}
+
+bool Extensions::hasEglExtension(const char* extension) const {
+   const String8 s(extension);
+   return mEglExtensionList.indexOf(s) >= 0;
+}
+
+void Extensions::findExtensions(const char* extensions, SortedVector<String8>& list) const {
+    const char* current = extensions;
+    const char* head = current;
+    EXT_LOGD("Available extensions:");
+    do {
+        head = strchr(current, ' ');
+        String8 s(current, head ? head - current : strlen(current));
+        if (s.length()) {
+            list.add(s);
+            EXT_LOGD("  %s", s.string());
+        }
+        current = head + 1;
+    } while (head);
 }
 
 void Extensions::dump() const {
-   ALOGD("%s", mVersion);
-   ALOGD("Supported extensions:\n%s", mExtensions);
+   ALOGD("%s", (const char*) glGetString(GL_VERSION));
+   ALOGD("Supported GL extensions:\n%s", (const char*) glGetString(GL_EXTENSIONS));
+   ALOGD("Supported EGL extensions:\n%s", eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS));
 }
 
 }; // namespace uirenderer
-- 
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