Move function decls and macros out of public headers that are meant for internal use.

git-svn-id: http://skia.googlecode.com/svn/trunk@3849 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 81 insertions, 0 deletions

diff --git a/src/gpu/gl/GrGLUtil.h b/src/gpu/gl/GrGLUtil.h
new file mode 100644
index 0000000000..4b89301005
--- /dev/null
+++ b/src/gpu/gl/GrGLUtil.h
@@ -0,0 +1,81 @@
+/*
+ * 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 GrGLUtil_DEFINED
+#define GrGLUtil_DEFINED
+
+#include "gl/GrGLInterface.h"
+#include "GrGLDefines.h"
+
+////////////////////////////////////////////////////////////////////////////////
+
+typedef uint32_t GrGLVersion;
+typedef uint32_t GrGLSLVersion;
+
+#define GR_GL_VER(major, minor) ((static_cast<int>(major) << 16) | \
+                                 static_cast<int>(minor))
+#define GR_GLSL_VER(major, minor) ((static_cast<int>(major) << 16) | \
+                                   static_cast<int>(minor))
+
+////////////////////////////////////////////////////////////////////////////////
+
+/**
+ *  Some drivers want the var-int arg to be zero-initialized on input.
+ */
+#define GR_GL_INIT_ZERO     0
+#define GR_GL_GetIntegerv(gl, e, p)                                            \
+    do {                                                                       \
+        *(p) = GR_GL_INIT_ZERO;                                                \
+        GR_GL_CALL(gl, GetIntegerv(e, p));                                     \
+    } while (0)
+
+#define GR_GL_GetFramebufferAttachmentParameteriv(gl, t, a, pname, p)          \
+    do {                                                                       \
+        *(p) = GR_GL_INIT_ZERO;                                                \
+        GR_GL_CALL(gl, GetFramebufferAttachmentParameteriv(t, a, pname, p));   \
+    } while (0)
+
+#define GR_GL_GetRenderbufferParameteriv(gl, t, pname, p)                      \
+    do {                                                                       \
+        *(p) = GR_GL_INIT_ZERO;                                                \
+        GR_GL_CALL(gl, GetRenderbufferParameteriv(t, pname, p));               \
+    } while (0)
+#define GR_GL_GetTexLevelParameteriv(gl, t, l, pname, p)                       \
+    do {                                                                       \
+        *(p) = GR_GL_INIT_ZERO;                                                \
+        GR_GL_CALL(gl, GetTexLevelParameteriv(t, l, pname, p));                \
+    } while (0)
+
+////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Helpers for glGetString()
+ */
+
+// these variants assume caller already has a string from glGetString()
+GrGLVersion GrGLGetVersionFromString(const char* versionString);
+GrGLBinding GrGLGetBindingInUseFromString(const char* versionString);
+GrGLSLVersion GrGLGetGLSLVersionFromString(const char* versionString);
+bool GrGLHasExtensionFromString(const char* ext, const char* extensionString);
+
+// these variants call glGetString()
+bool GrGLHasExtension(const GrGLInterface*, const char* ext);
+GrGLBinding GrGLGetBindingInUse(const GrGLInterface*);
+GrGLVersion GrGLGetVersion(const GrGLInterface*);
+GrGLSLVersion GrGLGetGLSLVersion(const GrGLInterface*);
+
+/**
+ * Helpers for glGetError()
+ */
+
+extern void GrGLCheckErr(const GrGLInterface* gl,
+                         const char* location,
+                         const char* call);
+
+extern void GrGLClearErr(const GrGLInterface* gl);
+
+#endif