Move SkGLContext and some GrGLInterface implementations to skgputest module

tools/gpu/gl/mesa/GLContext_mesa.cpp

Index: tools/gpu/gl/mesa/GLContext_mesa.cpp
diff --git a/src/gpu/gl/mesa/SkMesaGLContext.cpp b/tools/gpu/gl/mesa/GLContext_mesa.cpp
similarity index 52%
rename from src/gpu/gl/mesa/SkMesaGLContext.cpp
rename to tools/gpu/gl/mesa/GLContext_mesa.cpp
index eeccbd64ae6964a84ca15bbf0269b6259acd92e6..e6cc7c7f4b7dfc2b295483b5bfd8614c796a9a61 100644
--- a/src/gpu/gl/mesa/SkMesaGLContext.cpp
+++ b/tools/gpu/gl/mesa/GLContext_mesa.cpp
@@ -1,3 +1,4 @@
+
 /*
  * Copyright 2011 Google Inc.
  *
@@ -7,14 +8,52 @@
 
 #include <GL/osmesa.h>
 
-#include "gl/mesa/SkMesaGLContext.h"
+#include "gl/mesa/GLContext_mesa.h"
 #include "gl/GrGLDefines.h"
 
+#include "gl/GrGLAssembleInterface.h"
+#include "gl/GrGLUtil.h"
+#include "osmesa_wrapper.h"
+
+namespace {
+
+static GrGLFuncPtr osmesa_get(void* ctx, const char name[]) {
+    SkASSERT(nullptr == ctx);
+    SkASSERT(OSMesaGetCurrentContext());
+    return OSMesaGetProcAddress(name);
+}
+
+static const GrGLInterface* create_mesa_interface() {
+    if (nullptr == OSMesaGetCurrentContext()) {
+        return nullptr;
+    }
+    return GrGLAssembleInterface(nullptr, osmesa_get);
+}
+
 static const GrGLint gBOGUS_SIZE = 16;
 
-SkMesaGLContext::SkMesaGLContext()
-    : fContext(static_cast<Context>(0))
-    , fImage(nullptr) {
+class MesaGLContext : public sk_gpu_test::GLContext {
+private:
+    typedef intptr_t Context;
+
+public:
+    MesaGLContext();
+    ~MesaGLContext() override;
+
+private:
+    void destroyGLContext();
+
+    void onPlatformMakeCurrent() const override;
+
+    void onPlatformSwapBuffers() const override;
+
+    GrGLFuncPtr onPlatformGetProcAddress(const char *) const override;
+
+    Context fContext;
+    GrGLubyte *fImage;
+};
+
+MesaGLContext::MesaGLContext() : fContext(static_cast<Context>(0)), fImage(nullptr) {
     GR_STATIC_ASSERT(sizeof(Context) == sizeof(OSMesaContext));
 
     /* Create an RGBA-mode context */
@@ -22,7 +61,7 @@ SkMesaGLContext::SkMesaGLContext()
     /* specify Z, stencil, accum sizes */
     fContext = (Context)OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, nullptr);
 #else
-    fContext = (Context)OSMesaCreateContext(OSMESA_BGRA, nullptr);
+    fContext = (Context) OSMesaCreateContext(OSMESA_BGRA, nullptr);
 #endif
     if (!fContext) {
         SkDebugf("OSMesaCreateContext failed!\n");
@@ -39,7 +78,7 @@ SkMesaGLContext::SkMesaGLContext()
     }
 
     // Bind the buffer to the context and make it current
-    if (!OSMesaMakeCurrent((OSMesaContext)fContext,
+    if (!OSMesaMakeCurrent((OSMesaContext) fContext,
                            fImage,
                            GR_GL_UNSIGNED_BYTE,
                            gBOGUS_SIZE,
@@ -49,7 +88,7 @@ SkMesaGLContext::SkMesaGLContext()
         return;
     }
 
-    SkAutoTUnref<const GrGLInterface> gl(GrGLCreateMesaInterface());
+    SkAutoTUnref<const GrGLInterface> gl(create_mesa_interface());
     if (nullptr == gl.get()) {
         SkDebugf("Could not create GL interface!\n");
         this->destroyGLContext();
@@ -65,36 +104,48 @@ SkMesaGLContext::SkMesaGLContext()
     this->init(gl.release());
 }
 
-SkMesaGLContext::~SkMesaGLContext() {
+MesaGLContext::~MesaGLContext() {
     this->teardown();
     this->destroyGLContext();
 }
 
-void SkMesaGLContext::destroyGLContext() {
+void MesaGLContext::destroyGLContext() {
     if (fImage) {
         sk_free(fImage);
         fImage = nullptr;
     }
 
     if (fContext) {
-        OSMesaDestroyContext((OSMesaContext)fContext);
+        OSMesaDestroyContext((OSMesaContext) fContext);
         fContext = static_cast<Context>(0);
     }
 }
 
 
-
-void SkMesaGLContext::onPlatformMakeCurrent() const {
+void MesaGLContext::onPlatformMakeCurrent() const {
     if (fContext) {
-        if (!OSMesaMakeCurrent((OSMesaContext)fContext, fImage,
+        if (!OSMesaMakeCurrent((OSMesaContext) fContext, fImage,
                                GR_GL_UNSIGNED_BYTE, gBOGUS_SIZE, gBOGUS_SIZE)) {
             SkDebugf("Could not make MESA context current.");
         }
     }
 }
 
-void SkMesaGLContext::onPlatformSwapBuffers() const { }
+void MesaGLContext::onPlatformSwapBuffers() const { }
 
-GrGLFuncPtr SkMesaGLContext::onPlatformGetProcAddress(const char* procName) const {
+GrGLFuncPtr MesaGLContext::onPlatformGetProcAddress(const char *procName) const {
     return OSMesaGetProcAddress(procName);
 }
+}  // anonymous namespace
+
+
+namespace sk_gpu_test {
+GLContext *CreateMesaGLContext() {
+    MesaGLContext *ctx = new MesaGLContext;
+    if (!ctx->isValid()) {
+        delete ctx;
+        return nullptr;
+    }
+    return ctx;
+}
+}  // sk_gpu_test