Add GL indirect drawing APIs

include/gpu/gl/GrGLTypes.h

 
 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLTypes_DEFINED
 #define GrGLTypes_DEFINED
@@ skipping 40 matching lines @@
 typedef signed long long int GrGLsizeiptr;
 #else
 typedef signed long int GrGLintptr;
 typedef signed long int GrGLsizeiptr;
 #endif
 #else
 typedef signed long int GrGLintptr;
 typedef signed long int GrGLsizeiptr;
 #endif
 typedef void* GrGLeglImage;
+
+typedef struct {

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

Do we really need typedef struct? I don't really care but we'll never compile
this with a C compiler.

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

No, I just wrote them as typedefs to feel more like they were copy-pasted from
gl.h.

Also I named the fields with the same names that they have in gl.h. Would it be
better to start them with an f inside of skia?

  GrGLuint fCount;
  GrGLuint fInstanceCount;
  ...

[bsalomon, 2016/02/04 21:01:15]

That's a good point, we should either go all in on Gr or GL style. I'd prefer
sticking with Gr style (fField) just to avoid having a different set of rules to
follow here.

[Chris Dalton, 2016/02/04 21:05:41]

Sounds good.

+    GrGLuint count;
+    GrGLuint instanceCount;
+    GrGLuint first;
+    GrGLuint baseInstance;  // Requires EXT_base_instance on ES.
+} GrGLDrawArraysIndirectCommand;
+
+GR_STATIC_ASSERT(16 == sizeof(GrGLDrawArraysIndirectCommand));
+
+typedef struct {
+    GrGLuint count;
+    GrGLuint instanceCount;
+    GrGLuint firstIndex;
+    GrGLuint baseVertex;
+    GrGLuint baseInstance;  // Requires EXT_base_instance on ES.
+} GrGLDrawElementsIndirectCommand;
+
+GR_STATIC_ASSERT(20 == sizeof(GrGLDrawElementsIndirectCommand));
+
+/**
+ * KHR_debug
+ */
+typedef void (GR_GL_FUNCTION_TYPE* GRGLDEBUGPROC)(GrGLenum source,
+                                                  GrGLenum type,
+                                                  GrGLuint id,
+                                                  GrGLenum severity,
+                                                  GrGLsizei length,
+                                                  const GrGLchar* message,
+                                                  const void* userParam);
+
 /**
  * EGL types.
  */
-
 typedef void* GrEGLImage;
 typedef void* GrEGLDisplay;
 typedef void* GrEGLContext;
 typedef void* GrEGLClientBuffer;
 typedef unsigned int GrEGLenum;
 typedef int32_t GrEGLint;
 typedef unsigned int GrEGLBoolean;
 
 ///////////////////////////////////////////////////////////////////////////////
 /**
  * Types for interacting with GL resources created externally to Skia. GrBackendObjects for GL
  * textures are really const GrGLTexture*
  */
 
 struct GrGLTextureInfo {
     GrGLenum fTarget;
     GrGLuint fID;
 };
 
 GR_STATIC_ASSERT(sizeof(GrBackendObject) >= sizeof(const GrGLTextureInfo*));
 
 #endif