Add GL indirect drawing APIs

src/gpu/gl/GrGLCaps.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrGLCaps_DEFINED
 #define GrGLCaps_DEFINED
@@ skipping 265 matching lines @@
 
     /// Is there support for GL_KHR_debug?
     bool debugSupport() const { return fDebugSupport; }
 
     /// Is there support for ES2 compatability?
     bool ES2CompatibilitySupport() const { return fES2CompatibilitySupport; }
 
     /// Can we call glDisable(GL_MULTISAMPLE)?
     bool multisampleDisableSupport() const { return fMultisampleDisableSupport; }
 
+    /// Is there support for glDraw*Indirect? Note that the baseInstance fields of indirect draw
+    /// commands cannot be used unless we have base instance support.
+    bool drawIndirectSupport() const {

[bsalomon, 2016/02/04 16:33:41]

maybe make these one line just to match the similar functions above?

[Chris Dalton, 2016/02/04 20:45:55]

Oops, don't know how I missed that :-\

+        return fDrawIndirectSupport;
+    }
+
+    /// Is there support for glMultiDraw*Indirect? Note that the baseInstance fields of indirect
+    /// draw commands cannot be used unless we have base instance support.
+    bool multiDrawIndirectSupport() const {
+        return fMultiDrawIndirectSupport;
+    }
+
+    /// Are the baseInstance fields supported in indirect draw commands?
+    bool baseInstanceSupport() const {
+        return fBaseInstanceSupport;
+    }
+
     /// Use indices or vertices in CPU arrays rather than VBOs for dynamic content.
     bool useNonVBOVertexAndIndexDynamicData() const { return fUseNonVBOVertexAndIndexDynamicData; }
 
     /// Does ReadPixels support reading readConfig pixels from a FBO that is renderTargetConfig?
     bool readPixelsSupported(GrPixelConfig renderTargetConfig,
                              GrPixelConfig readConfig,
                              std::function<void (GrGLenum, GrGLint*)> getIntegerv,
                              std::function<bool ()> bindRenderTarget) const;
 
     bool isCoreProfile() const { return fIsCoreProfile; }
@@ skipping 75 matching lines @@
     bool fPackFlipYSupport : 1;
     bool fTextureUsageSupport : 1;
     bool fTexStorageSupport : 1;
     bool fTextureRedSupport : 1;
     bool fImagingSupport  : 1;
     bool fVertexArrayObjectSupport : 1;
     bool fDirectStateAccessSupport : 1;
     bool fDebugSupport : 1;
     bool fES2CompatibilitySupport : 1;
     bool fMultisampleDisableSupport : 1;
+    bool fDrawIndirectSupport : 1;
+    bool fMultiDrawIndirectSupport : 1;
+    bool fBaseInstanceSupport : 1;
     bool fUseNonVBOVertexAndIndexDynamicData : 1;
     bool fIsCoreProfile : 1;
     bool fBindFragDataLocationSupport : 1;
     bool fSRGBWriteControl : 1;
     bool fRGBA8888PixelsOpsAreSlow : 1;
     bool fPartialFBOReadIsSlow : 1;
     bool fBindUniformLocationSupport : 1;
     bool fExternalTextureSupport : 1;
     bool fRectangleTextureSupport : 1;
     bool fTextureSwizzleSupport : 1;
@@ skipping 65 matching lines @@
 
         GrSwizzle fSwizzle;
     };
 
     ConfigInfo fConfigTable[kGrPixelConfigCnt];
 
     typedef GrCaps INHERITED;
 };
 
 #endif