Revert of Move SkGLContext and some GrGLInterface implementations to skgputest module

src/gpu/gl/angle/SkANGLEGLContext.cpp

Index: src/gpu/gl/angle/SkANGLEGLContext.cpp
diff --git a/src/gpu/gl/angle/SkANGLEGLContext.cpp b/src/gpu/gl/angle/SkANGLEGLContext.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..c6ea44381f5e3ced522f5ae40bdbc7340a2ad515
--- /dev/null
+++ b/src/gpu/gl/angle/SkANGLEGLContext.cpp
@@ -0,0 +1,229 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "gl/angle/SkANGLEGLContext.h"
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include "gl/GrGLDefines.h"
+#include "gl/GrGLUtil.h"
+
+#define EGL_PLATFORM_ANGLE_ANGLE                0x3202
+#define EGL_PLATFORM_ANGLE_TYPE_ANGLE           0x3203
+#define EGL_PLATFORM_ANGLE_TYPE_D3D9_ANGLE      0x3207
+#define EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE     0x3208
+#define EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE    0x320D
+
+void* SkANGLEGLContext::GetD3DEGLDisplay(void* nativeDisplay, bool useGLBackend) {
+    PFNEGLGETPLATFORMDISPLAYEXTPROC eglGetPlatformDisplayEXT;
+    eglGetPlatformDisplayEXT =
+        (PFNEGLGETPLATFORMDISPLAYEXTPROC)eglGetProcAddress("eglGetPlatformDisplayEXT");
+
+    if (!eglGetPlatformDisplayEXT) {
+        return eglGetDisplay(static_cast<EGLNativeDisplayType>(nativeDisplay));
+    }
+
+    EGLDisplay display = EGL_NO_DISPLAY;
+    if (useGLBackend) {
+        // Try for an ANGLE D3D11 context, fall back to D3D9.
+        EGLint attribs[3] = {
+              EGL_PLATFORM_ANGLE_TYPE_ANGLE,
+              EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE,
+              EGL_NONE
+        };
+        display = eglGetPlatformDisplayEXT(EGL_PLATFORM_ANGLE_ANGLE, nativeDisplay, attribs);
+    } else {
+        // Try for an ANGLE D3D11 context, fall back to D3D9, and finally GL.
+        EGLint attribs[3][3] = {
+            {
+                EGL_PLATFORM_ANGLE_TYPE_ANGLE,
+                EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE,
+                EGL_NONE
+            },
+            {
+                EGL_PLATFORM_ANGLE_TYPE_ANGLE,
+                EGL_PLATFORM_ANGLE_TYPE_D3D9_ANGLE,
+                EGL_NONE
+            },
+            {
+                EGL_PLATFORM_ANGLE_TYPE_ANGLE,
+                EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE,
+                EGL_NONE
+            }
+        };
+        for (int i = 0; i < 3 && display == EGL_NO_DISPLAY; ++i) {
+            display = eglGetPlatformDisplayEXT(EGL_PLATFORM_ANGLE_ANGLE,nativeDisplay, attribs[i]);
+        }
+    }
+    return display;
+}
+
+SkANGLEGLContext::SkANGLEGLContext(bool useGLBackend)
+    : fContext(EGL_NO_CONTEXT)
+    , fDisplay(EGL_NO_DISPLAY)
+    , fSurface(EGL_NO_SURFACE) {
+
+    EGLint numConfigs;
+    static const EGLint configAttribs[] = {
+        EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
+        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+        EGL_RED_SIZE, 8,
+        EGL_GREEN_SIZE, 8,
+        EGL_BLUE_SIZE, 8,
+        EGL_ALPHA_SIZE, 8,
+        EGL_NONE
+    };
+
+    fIsGLBackend = useGLBackend;
+    fDisplay = GetD3DEGLDisplay(EGL_DEFAULT_DISPLAY, useGLBackend);
+    if (EGL_NO_DISPLAY == fDisplay) {
+        SkDebugf("Could not create EGL display!");
+        return;
+    }
+
+    EGLint majorVersion;
+    EGLint minorVersion;
+    eglInitialize(fDisplay, &majorVersion, &minorVersion);
+
+    EGLConfig surfaceConfig;
+    eglChooseConfig(fDisplay, configAttribs, &surfaceConfig, 1, &numConfigs);
+
+    static const EGLint contextAttribs[] = {
+        EGL_CONTEXT_CLIENT_VERSION, 2,
+        EGL_NONE
+    };
+    fContext = eglCreateContext(fDisplay, surfaceConfig, nullptr, contextAttribs);
+
+
+    static const EGLint surfaceAttribs[] = {
+        EGL_WIDTH, 1,
+        EGL_HEIGHT, 1,
+        EGL_NONE
+    };
+
+    fSurface = eglCreatePbufferSurface(fDisplay, surfaceConfig, surfaceAttribs);
+
+    eglMakeCurrent(fDisplay, fSurface, fSurface, fContext);
+
+    SkAutoTUnref<const GrGLInterface> gl(GrGLCreateANGLEInterface());
+    if (nullptr == gl.get()) {
+        SkDebugf("Could not create ANGLE GL interface!\n");
+        this->destroyGLContext();
+        return;
+    }
+    if (!gl->validate()) {
+        SkDebugf("Could not validate ANGLE GL interface!\n");
+        this->destroyGLContext();
+        return;
+    }
+
+    this->init(gl.release());
+}
+
+SkANGLEGLContext::~SkANGLEGLContext() {
+    this->teardown();
+    this->destroyGLContext();
+}
+
+GrEGLImage SkANGLEGLContext::texture2DToEGLImage(GrGLuint texID) const {
+    if (!this->gl()->hasExtension("EGL_KHR_gl_texture_2D_image")) {
+        return GR_EGL_NO_IMAGE;
+    }
+    GrEGLImage img;
+    GrEGLint attribs[] = { GR_EGL_GL_TEXTURE_LEVEL, 0,
+                           GR_EGL_IMAGE_PRESERVED, GR_EGL_TRUE,
+                           GR_EGL_NONE };
+    // 64 bit cast is to shut Visual C++ up about casting 32 bit value to a pointer.
+    GrEGLClientBuffer clientBuffer = reinterpret_cast<GrEGLClientBuffer>((uint64_t)texID);
+    GR_GL_CALL_RET(this->gl(), img,
+                   EGLCreateImage(fDisplay, fContext, GR_EGL_GL_TEXTURE_2D, clientBuffer,
+                                  attribs));
+    return img;
+}
+
+void SkANGLEGLContext::destroyEGLImage(GrEGLImage image) const {
+    GR_GL_CALL(this->gl(), EGLDestroyImage(fDisplay, image));
+}
+
+GrGLuint SkANGLEGLContext::eglImageToExternalTexture(GrEGLImage image) const {
+    GrGLClearErr(this->gl());
+    if (!this->gl()->hasExtension("GL_OES_EGL_image_external")) {
+        return 0;
+    }
+    typedef GrGLvoid (*EGLImageTargetTexture2DProc)(GrGLenum, GrGLeglImage);
+
+    EGLImageTargetTexture2DProc glEGLImageTargetTexture2D =
+        (EGLImageTargetTexture2DProc)eglGetProcAddress("glEGLImageTargetTexture2DOES");
+    if (!glEGLImageTargetTexture2D) {
+        return 0;
+    }
+    GrGLuint texID;
+    GR_GL_CALL(this->gl(), GenTextures(1, &texID));
+    if (!texID) {
+        return 0;
+    }
+    GR_GL_CALL(this->gl(), BindTexture(GR_GL_TEXTURE_EXTERNAL, texID));
+    if (GR_GL_GET_ERROR(this->gl()) != GR_GL_NO_ERROR) {
+        GR_GL_CALL(this->gl(), DeleteTextures(1, &texID));
+        return 0;
+    }
+    glEGLImageTargetTexture2D(GR_GL_TEXTURE_EXTERNAL, image);
+    if (GR_GL_GET_ERROR(this->gl()) != GR_GL_NO_ERROR) {
+        GR_GL_CALL(this->gl(), DeleteTextures(1, &texID));
+        return 0;
+    }
+    return texID;
+}
+
+SkGLContext* SkANGLEGLContext::createNew() const {
+#ifdef SK_BUILD_FOR_WIN
+    SkGLContext* ctx = fIsGLBackend ? SkANGLEGLContext::CreateOpenGL()
+                                    : SkANGLEGLContext::CreateDirectX();
+#else
+    SkGLContext* ctx = SkANGLEGLContext::CreateOpenGL();
+#endif
+    if (ctx) {
+        ctx->makeCurrent();
+    }
+    return ctx;
+}
+
+void SkANGLEGLContext::destroyGLContext() {
+    if (fDisplay) {
+        eglMakeCurrent(fDisplay, 0, 0, 0);
+
+        if (fContext) {
+            eglDestroyContext(fDisplay, fContext);
+            fContext = EGL_NO_CONTEXT;
+        }
+
+        if (fSurface) {
+            eglDestroySurface(fDisplay, fSurface);
+            fSurface = EGL_NO_SURFACE;
+        }
+
+        //TODO should we close the display?
+        fDisplay = EGL_NO_DISPLAY;
+    }
+}
+
+void SkANGLEGLContext::onPlatformMakeCurrent() const {
+    if (!eglMakeCurrent(fDisplay, fSurface, fSurface, fContext)) {
+        SkDebugf("Could not set the context.\n");
+    }
+}
+
+void SkANGLEGLContext::onPlatformSwapBuffers() const {
+    if (!eglSwapBuffers(fDisplay, fSurface)) {
+        SkDebugf("Could not complete eglSwapBuffers.\n");
+    }
+}
+
+GrGLFuncPtr SkANGLEGLContext::onPlatformGetProcAddress(const char* name) const {
+    return eglGetProcAddress(name);
+}