Revert of Move SkGLContext and some GrGLInterface implementations to skgputest module

src/gpu/gl/mesa/SkMesaGLContext.cpp

Index: src/gpu/gl/mesa/SkMesaGLContext.cpp
diff --git a/src/gpu/gl/mesa/SkMesaGLContext.cpp b/src/gpu/gl/mesa/SkMesaGLContext.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..eeccbd64ae6964a84ca15bbf0269b6259acd92e6
--- /dev/null
+++ b/src/gpu/gl/mesa/SkMesaGLContext.cpp
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <GL/osmesa.h>
+
+#include "gl/mesa/SkMesaGLContext.h"
+#include "gl/GrGLDefines.h"
+
+static const GrGLint gBOGUS_SIZE = 16;
+
+SkMesaGLContext::SkMesaGLContext()
+    : fContext(static_cast<Context>(0))
+    , fImage(nullptr) {
+    GR_STATIC_ASSERT(sizeof(Context) == sizeof(OSMesaContext));
+
+    /* Create an RGBA-mode context */
+#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
+    /* specify Z, stencil, accum sizes */
+    fContext = (Context)OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, nullptr);
+#else
+    fContext = (Context)OSMesaCreateContext(OSMESA_BGRA, nullptr);
+#endif
+    if (!fContext) {
+        SkDebugf("OSMesaCreateContext failed!\n");
+        this->destroyGLContext();
+        return;
+    }
+    // Allocate the image buffer
+    fImage = (GrGLubyte *) sk_malloc_throw(gBOGUS_SIZE * gBOGUS_SIZE *
+                                           4 * sizeof(GrGLubyte));
+    if (!fImage) {
+        SkDebugf("Alloc image buffer failed!\n");
+        this->destroyGLContext();
+        return;
+    }
+
+    // Bind the buffer to the context and make it current
+    if (!OSMesaMakeCurrent((OSMesaContext)fContext,
+                           fImage,
+                           GR_GL_UNSIGNED_BYTE,
+                           gBOGUS_SIZE,
+                           gBOGUS_SIZE)) {
+        SkDebugf("OSMesaMakeCurrent failed!\n");
+        this->destroyGLContext();
+        return;
+    }
+
+    SkAutoTUnref<const GrGLInterface> gl(GrGLCreateMesaInterface());
+    if (nullptr == gl.get()) {
+        SkDebugf("Could not create GL interface!\n");
+        this->destroyGLContext();
+        return;
+    }
+
+    if (!gl->validate()) {
+        SkDebugf("Could not validate GL interface!\n");
+        this->destroyGLContext();
+        return;
+    }
+
+    this->init(gl.release());
+}
+
+SkMesaGLContext::~SkMesaGLContext() {
+    this->teardown();
+    this->destroyGLContext();
+}
+
+void SkMesaGLContext::destroyGLContext() {
+    if (fImage) {
+        sk_free(fImage);
+        fImage = nullptr;
+    }
+
+    if (fContext) {
+        OSMesaDestroyContext((OSMesaContext)fContext);
+        fContext = static_cast<Context>(0);
+    }
+}
+
+
+
+void SkMesaGLContext::onPlatformMakeCurrent() const {
+    if (fContext) {
+        if (!OSMesaMakeCurrent((OSMesaContext)fContext, fImage,
+                               GR_GL_UNSIGNED_BYTE, gBOGUS_SIZE, gBOGUS_SIZE)) {
+            SkDebugf("Could not make MESA context current.");
+        }
+    }
+}
+
+void SkMesaGLContext::onPlatformSwapBuffers() const { }
+
+GrGLFuncPtr SkMesaGLContext::onPlatformGetProcAddress(const char* procName) const {
+    return OSMesaGetProcAddress(procName);
+}