Bug 975824 - Disable S3TC compressed texture support on VMware Gallium 0.4 with

llvmpipe. r=jgilbert

gfx/gl/GLContext.cpp

@@ -538,7 +538,8 @@ GLContext::InitWithPrefix(const char *prefix, bool trygl)
                 "Qualcomm",
                 "Imagination",
                 "nouveau",
-                "Vivante"
+                "Vivante",
+                "VMware, Inc."
         };
 
         mVendor = GLVendor::Other;
@@ -563,7 +564,8 @@ GLContext::InitWithPrefix(const char *prefix, bool trygl)
                 "PowerVR SGX 530",
                 "PowerVR SGX 540",
                 "NVIDIA Tegra",
-                "Android Emulator"
+                "Android Emulator",
+                "Gallium 0.4 on llvmpipe"
         };
 
         mRenderer = GLRenderer::Other;
@@ -1097,7 +1099,7 @@ GLContext::InitWithPrefix(const char *prefix, bool trygl)
                     mMaxTextureSize = std::min(mMaxTextureSize, 4096);
                     mMaxRenderbufferSize = std::min(mMaxRenderbufferSize, 4096);
                 }
-                
+
                 // Part of the bug 879656, but it also doesn't hurt the 877949
                 mNeedsTextureSizeChecks = true;
             }
@@ -1178,6 +1180,19 @@ GLContext::InitExtensions()
         MarkExtensionSupported(OES_rgb8_rgba8);
     }
 
+    if (WorkAroundDriverBugs() &&
+        Vendor() == GLVendor::VMware &&
+        Renderer() == GLRenderer::GalliumLlvmpipe)
+    {
+        // The llvmpipe driver that is used on linux try servers appears to have
+        // buggy support for s3tc/dxt1 compressed textures.
+        // See Bug 975824.
+        MarkExtensionUnsupported(EXT_texture_compression_s3tc);
+        MarkExtensionUnsupported(EXT_texture_compression_dxt1);
+        MarkExtensionUnsupported(ANGLE_texture_compression_dxt3);
+        MarkExtensionUnsupported(ANGLE_texture_compression_dxt5);
+    }
+
 #ifdef DEBUG
     firstRun = false;
 #endif

gfx/gl/GLContext.h

@@ -131,6 +131,7 @@ MOZ_BEGIN_ENUM_CLASS(GLVendor)
     Imagination,
     Nouveau,
     Vivante,
+    VMware,
     Other
 MOZ_END_ENUM_CLASS(GLVendor)
 
@@ -143,6 +144,7 @@ MOZ_BEGIN_ENUM_CLASS(GLRenderer)
     SGX540,
     Tegra,
     AndroidEmulator,
+    GalliumLlvmpipe,
     Other
 MOZ_END_ENUM_CLASS(GLRenderer)