commit 459104ceea00a08855099238563a06099340c2fa
author commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> Fri Jun 14 14:42:56 2013 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> Fri Jun 14 14:42:56 2013 +0000
tree 28bc359d99521cdceaf2ed5229bf6ad5a822a675
parent 61c49f357a03f68c12c2650ac9915657298352a4

Add MESA detection to GrContextInfo and use to decide whether to use GL_ALPHA or GL_RED.

Based on yunchao.he@intel.com's original change here: https://codereview.chromium.org/15994006/

R=yunchao.he@intel.com, robertphillips@google.com

Author: bsalomon@google.com

Review URL: https://chromiumcodereview.appspot.com/16955005

git-svn-id: http://skia.googlecode.com/svn/trunk@9608 2bbb7eff-a529-9590-31e7-b0007b416f81

src/gpu/gl/GrGLUtil.cpp

diff --git a/src/gpu/gl/GrGLUtil.cpp b/src/gpu/gl/GrGLUtil.cpp
index 08bbebc..a13b03d 100644
--- a/src/gpu/gl/GrGLUtil.cpp
+++ b/src/gpu/gl/GrGLUtil.cpp
@@ -121,6 +121,12 @@
     return kNone_GrGLBinding;
 }
 
+bool GrGLIsMesaFromVersionString(const char* versionString) {
+    int major, minor, mesaMajor, mesaMinor;
+    int n = sscanf(versionString, "%d.%d Mesa %d.%d", &major, &minor, &mesaMajor, &mesaMinor);
+    return 4 == n;
+}
+
 GrGLVersion GrGLGetVersionFromString(const char* versionString) {
     if (NULL == versionString) {
         GrAssert(!"NULL GL version string.");