Move SkGLContext and some GrGLInterface implementations to skgputest module

tools/gpu/gl/angle/GLContext_angle.cpp

 
 /*
  * 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 "GLContext_angle.h"
 
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 
 #include "gl/GrGLDefines.h"
 #include "gl/GrGLUtil.h"
 
+#include "gl/GrGLInterface.h"
+#include "gl/GrGLAssembleInterface.h"
+#include "../ports/SkOSLibrary.h"
+
+#include <EGL/egl.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) {
+namespace {
+struct Libs {
+    void* fGLLib;
+    void* fEGLLib;
+};
+
+static GrGLFuncPtr angle_get_gl_proc(void* ctx, const char name[]) {
+    const Libs* libs = reinterpret_cast<const Libs*>(ctx);
+    GrGLFuncPtr proc = (GrGLFuncPtr) GetProcedureAddress(libs->fGLLib, name);
+    if (proc) {
+        return proc;
+    }
+    proc = (GrGLFuncPtr) GetProcedureAddress(libs->fEGLLib, name);
+    if (proc) {
+        return proc;
+    }
+    return eglGetProcAddress(name);
+}
+
+void* get_angle_egl_display(void* nativeDisplay, bool useGLBackend) {
     PFNEGLGETPLATFORMDISPLAYEXTPROC eglGetPlatformDisplayEXT;
     eglGetPlatformDisplayEXT =
         (PFNEGLGETPLATFORMDISPLAYEXTPROC)eglGetProcAddress("eglGetPlatformDisplayEXT");
 
+    // We expect ANGLE to support this extension
     if (!eglGetPlatformDisplayEXT) {
-        return eglGetDisplay(static_cast<EGLNativeDisplayType>(nativeDisplay));
+        return EGL_NO_DISPLAY;
     }
 
     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
+            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.
+        // Try for an ANGLE D3D11 context, fall back to D3D9.
         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)
+class ANGLEGLContext : public sk_gpu_test::GLContext {
+public:
+    ANGLEGLContext(bool preferGLBackend);
+    ~ANGLEGLContext() override;
+
+    GrEGLImage texture2DToEGLImage(GrGLuint texID) const override;
+    void destroyEGLImage(GrEGLImage) const override;
+    GrGLuint eglImageToExternalTexture(GrEGLImage) const override;
+    sk_gpu_test::GLContext* createNew() const override;
+
+private:
+    void destroyGLContext();
+
+    void onPlatformMakeCurrent() const override;
+    void onPlatformSwapBuffers() const override;
+    GrGLFuncPtr onPlatformGetProcAddress(const char* name) const override;
+
+    void* fContext;
+    void* fDisplay;
+    void* fSurface;
+    bool  fIsGLBackend;
+};
+
+ANGLEGLContext::ANGLEGLContext(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);
+    fDisplay = get_angle_egl_display(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());
+    SkAutoTUnref<const GrGLInterface> gl(sk_gpu_test::CreateANGLEGLInterface());
     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() {
+ANGLEGLContext::~ANGLEGLContext() {
     this->teardown();
     this->destroyGLContext();
 }
 
-GrEGLImage SkANGLEGLContext::texture2DToEGLImage(GrGLuint texID) const {
+GrEGLImage ANGLEGLContext::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 {
+void ANGLEGLContext::destroyEGLImage(GrEGLImage image) const {
     GR_GL_CALL(this->gl(), EGLDestroyImage(fDisplay, image));
 }
 
-GrGLuint SkANGLEGLContext::eglImageToExternalTexture(GrEGLImage image) const {
+GrGLuint ANGLEGLContext::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 {
+sk_gpu_test::GLContext* ANGLEGLContext::createNew() const {
 #ifdef SK_BUILD_FOR_WIN
-    SkGLContext* ctx = fIsGLBackend ? SkANGLEGLContext::CreateOpenGL()
-                                    : SkANGLEGLContext::CreateDirectX();
+    sk_gpu_test::GLContext* ctx = fIsGLBackend ? sk_gpu_test::CreateANGLEOpenGLGLContext()
+                                               : sk_gpu_test::CreateANGLEDirect3DGLContext();
 #else
-    SkGLContext* ctx = SkANGLEGLContext::CreateOpenGL();
+    sk_gpu_test::GLContext* ctx = sk_gpu_test::CreateANGLEOpenGLGLContext();
 #endif
     if (ctx) {
         ctx->makeCurrent();
     }
     return ctx;
 }
 
-void SkANGLEGLContext::destroyGLContext() {
+void ANGLEGLContext::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 {
+void ANGLEGLContext::onPlatformMakeCurrent() const {
     if (!eglMakeCurrent(fDisplay, fSurface, fSurface, fContext)) {
         SkDebugf("Could not set the context.\n");
     }
 }
 
-void SkANGLEGLContext::onPlatformSwapBuffers() const {
+void ANGLEGLContext::onPlatformSwapBuffers() const {
     if (!eglSwapBuffers(fDisplay, fSurface)) {
         SkDebugf("Could not complete eglSwapBuffers.\n");
     }
 }
 
-GrGLFuncPtr SkANGLEGLContext::onPlatformGetProcAddress(const char* name) const {
+GrGLFuncPtr ANGLEGLContext::onPlatformGetProcAddress(const char* name) const {
     return eglGetProcAddress(name);
 }
+}  // anonymous namespace
+
+namespace sk_gpu_test {
+const GrGLInterface* CreateANGLEGLInterface() {
+    static Libs gLibs = { nullptr, nullptr };
+
+    if (nullptr == gLibs.fGLLib) {
+        // We load the ANGLE library and never let it go
+#if defined _WIN32
+        gLibs.fGLLib = DynamicLoadLibrary("libGLESv2.dll");
+        gLibs.fEGLLib = DynamicLoadLibrary("libEGL.dll");
+#elif defined SK_BUILD_FOR_MAC
+        gLibs.fGLLib = DynamicLoadLibrary("libGLESv2.dylib");
+        gLibs.fEGLLib = DynamicLoadLibrary("libEGL.dylib");
+#else
+        gLibs.fGLLib = DynamicLoadLibrary("libGLESv2.so");
+        gLibs.fEGLLib = DynamicLoadLibrary("libEGL.so");
+#endif
+    }
+
+    if (nullptr == gLibs.fGLLib || nullptr == gLibs.fEGLLib) {
+        // We can't setup the interface correctly w/o the so
+        return nullptr;
+    }
+
+    return GrGLAssembleGLESInterface(&gLibs, angle_get_gl_proc);
+}
+
+#ifdef SK_BUILD_FOR_WIN
+GLContext* CreateANGLEDirect3DGLContext() {
+    ANGLEGLContext* ctx = new ANGLEGLContext(false);
+    if (!ctx->isValid()) {
+        delete ctx;
+        return NULL;
+    }
+    return ctx;
+}
+#endif
+
+GLContext* CreateANGLEOpenGLGLContext() {
+    ANGLEGLContext* ctx = new ANGLEGLContext(true);
+    if (!ctx->isValid()) {
+        delete ctx;
+        return NULL;
+    }
+    return ctx;
+}
+}  // namespace sk_gpu_test