skia: add ability to load command_buffer_gles2

src/views/win/SkOSWindow_win.cpp

 
 /*
  * 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 "SkTypes.h"
 
 #if defined(SK_BUILD_FOR_WIN)
@@ skipping 12 matching lines @@
 #if SK_ANGLE
 #include "gl/angle/SkANGLEGLContext.h"
 #include "gl/GrGLInterface.h"
 #include "GLES2/gl2.h"
 
 #define ANGLE_GL_CALL(IFACE, X)                                 \
     do {                                                        \
         (IFACE)->fFunctions.f##X;                               \
     } while (false)
 
-#endif
+#endif // SK_ANGLE
+
+#if SK_COMMAND_BUFFER
+#include "gl/command_buffer/SkCommandBufferGLContext.h"
+
+#define COMMAND_BUFFER_GL_CALL(IFACE, X)                                 \
+    do {                                                        \
+        (IFACE)->fFunctions.f##X;                               \
+    } while (false)
+
+#endif // SK_COMMAND_BUFFER
 
 #define WM_EVENT_CALLBACK (WM_USER+0)
 
 void post_skwinevent(HWND hwnd)
 {
     PostMessage(hwnd, WM_EVENT_CALLBACK, 0, 0);
 }
 
 SkTHashMap<void*, SkOSWindow*> SkOSWindow::gHwndToOSWindowMap;
 
 SkOSWindow::SkOSWindow(const void* winInit) {
     fWinInit = *(const WindowInit*)winInit;
 
     fHWND = CreateWindow(fWinInit.fClass, NULL, WS_OVERLAPPEDWINDOW,
                          CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, fWinInit.fInstance, NULL);
     gHwndToOSWindowMap.set(fHWND, this);
 #if SK_SUPPORT_GPU
 #if SK_ANGLE
     fDisplay = EGL_NO_DISPLAY;
     fContext = EGL_NO_CONTEXT;
     fSurface = EGL_NO_SURFACE;
 #endif
+#if SK_COMMAND_BUFFER
+    fCommandBuffer = nullptr;
+#endif // SK_COMMAND_BUFFER
+
     fHGLRC = NULL;
 #endif
     fAttached = kNone_BackEndType;
     fFullscreen = false;
 }
 
 SkOSWindow::~SkOSWindow() {
 #if SK_SUPPORT_GPU
     if (fHGLRC) {
         wglDeleteContext((HGLRC)fHGLRC);
     }
 #if SK_ANGLE
     if (EGL_NO_CONTEXT != fContext) {
         eglDestroyContext(fDisplay, fContext);
         fContext = EGL_NO_CONTEXT;
     }
 
     if (EGL_NO_SURFACE != fSurface) {
         eglDestroySurface(fDisplay, fSurface);
         fSurface = EGL_NO_SURFACE;
     }
 
     if (EGL_NO_DISPLAY != fDisplay) {
         eglTerminate(fDisplay);
         fDisplay = EGL_NO_DISPLAY;
     }
 #endif // SK_ANGLE
+#if SK_COMMAND_BUFFER
+    delete fCommandBuffer;
+#endif // SK_COMMAND_BUFFER
+
 #endif // SK_SUPPORT_GPU
     this->closeWindow();
 }
 
 static SkKey winToskKey(WPARAM vk) {
     static const struct {
         WPARAM    fVK;
         SkKey    fKey;
     } gPair[] = {
         { VK_BACK,    kBack_SkKey },
@@ skipping 430 matching lines @@
 void SkOSWindow::presentANGLE() {
     SkAutoTUnref<const GrGLInterface> intf(GrGLCreateANGLEInterface());
 
     if (intf) {
         ANGLE_GL_CALL(intf, Flush());
     }
 
     eglSwapBuffers(fDisplay, fSurface);
 }
 #endif // SK_ANGLE
+
+#if SK_COMMAND_BUFFER
+
+bool SkOSWindow::attachCommandBuffer(int msaaSampleCount, AttachmentInfo* info) {
+    if (!fCommandBuffer) {
+        fCommandBuffer = SkCommandBufferGLContext::Create((HWND)fHWND, msaaSampleCount);
+        if (!fCommandBuffer)
+            return false;
+    
+        SkAutoTUnref<const GrGLInterface> intf(GrGLCreateCommandBufferInterface());
+        if (intf) {
+            COMMAND_BUFFER_GL_CALL(intf, ClearStencil(0));
+            COMMAND_BUFFER_GL_CALL(intf, ClearColor(0, 0, 0, 0));
+            COMMAND_BUFFER_GL_CALL(intf, StencilMask(0xffffffff));
+            COMMAND_BUFFER_GL_CALL(intf, Clear(GL_STENCIL_BUFFER_BIT |GL_COLOR_BUFFER_BIT));
+        }
+    }
+
+    if (fCommandBuffer->makeCurrent()) {
+        info->fStencilBits = fCommandBuffer->getStencilBits();
+        info->fSampleCount = fCommandBuffer->getSampleCount();
+
+        SkAutoTUnref<const GrGLInterface> intf(GrGLCreateCommandBufferInterface());
+
+        if (intf ) {
+            COMMAND_BUFFER_GL_CALL(intf, Viewport(0, 0,
+                                         SkScalarRoundToInt(this->width()),
+                                         SkScalarRoundToInt(this->height())));
+        }
+        return true;
+    }
+    return false;
+}
+
+void SkOSWindow::detachCommandBuffer() {
+    delete fCommandBuffer;
+    fCommandBuffer = nullptr;
+}
+
+void SkOSWindow::presentCommandBuffer() {
+    fCommandBuffer->presentCommandBuffer();
+}
+#endif // SK_COMMAND_BUFFER
+
 #endif // SK_SUPPORT_GPU
 
 // return true on success
 bool SkOSWindow::attach(SkBackEndTypes attachType, int msaaSampleCount, AttachmentInfo* info) {
 
     // attach doubles as "windowResize" so we need to allo
     // already bound states to pass through again
     // TODO: split out the resize functionality
 //    SkASSERT(kNone_BackEndType == fAttached);
     bool result = true;
 
     switch (attachType) {
     case kNone_BackEndType:
         // nothing to do
         break;
 #if SK_SUPPORT_GPU
     case kNativeGL_BackEndType:
         result = attachGL(msaaSampleCount, info);
         break;
 #if SK_ANGLE
     case kANGLE_BackEndType:
         result = attachANGLE(msaaSampleCount, info);
         break;
 #endif // SK_ANGLE
+#if SK_COMMAND_BUFFER
+    case kCommandBuffer_BackEndType:
+        result = attachCommandBuffer(msaaSampleCount, info);
+        break;
+#endif // SK_COMMAND_BUFFER
 #endif // SK_SUPPORT_GPU
     default:
         SkASSERT(false);
         result = false;
         break;
     }
 
     if (result) {
         fAttached = attachType;
     }
 
     return result;
 }
 
 void SkOSWindow::detach() {
     switch (fAttached) {
     case kNone_BackEndType:
         // nothing to do
         break;
 #if SK_SUPPORT_GPU
     case kNativeGL_BackEndType:
         detachGL();
         break;
 #if SK_ANGLE
     case kANGLE_BackEndType:
         detachANGLE();
         break;
 #endif // SK_ANGLE
+#if SK_COMMAND_BUFFER
+    case kCommandBuffer_BackEndType:
+        detachCommandBuffer();
+        break;
+#endif // SK_COMMAND_BUFFER
 #endif // SK_SUPPORT_GPU
     default:
         SkASSERT(false);
         break;
     }
     fAttached = kNone_BackEndType;
 }
 
 void SkOSWindow::present() {
     switch (fAttached) {
     case kNone_BackEndType:
         // nothing to do
         return;
 #if SK_SUPPORT_GPU
     case kNativeGL_BackEndType:
         presentGL();
         break;
 #if SK_ANGLE
     case kANGLE_BackEndType:
         presentANGLE();
         break;
 #endif // SK_ANGLE
+#if SK_COMMAND_BUFFER
+    case kCommandBuffer_BackEndType:
+        presentCommandBuffer();
+        break;
+#endif // SK_COMMAND_BUFFER
 #endif // SK_SUPPORT_GPU
     default:
         SkASSERT(false);
         break;
     }
 }
 
 bool SkOSWindow::makeFullscreen() {
     if (fFullscreen) {
         return true;
@@ skipping 74 matching lines @@
 }
 
 void SkOSWindow::closeWindow() {
     DestroyWindow((HWND)fHWND);
     if (fFullscreen) {
         DestroyWindow((HWND)fSavedWindowState.fHWND);
     }
     gHwndToOSWindowMap.remove(fHWND);
 }
 #endif