Add some copy support for vulkan msaa

src/gpu/gl/GrGLGpu.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 "GrGLGpu.h"
 #include "GrGLBuffer.h"
 #include "GrGLGLSL.h"
@@ skipping 3568 matching lines @@
         SkASSERT(surface->asTexture());
         GrGLenum textureTarget = static_cast<GrGLTexture*>(surface->asTexture())->target();
         GR_GL_CALL(this->glInterface(), FramebufferTexture2D(fboTarget,
                                                              GR_GL_COLOR_ATTACHMENT0,
                                                              textureTarget,
                                                              0,
                                                              0));
     }
 }
 
-bool GrGLGpu::initCopySurfaceDstDesc(const GrSurface* src, GrSurfaceDesc* desc) const {
+bool GrGLGpu::initDescForDstCopy(const GrRenderTarget* src, GrSurfaceDesc* desc) const {
     // If the src is a texture, we can implement the blit as a draw assuming the config is
     // renderable.
     if (src->asTexture() && this->caps()->isConfigRenderable(src->config(), false)) {
         desc->fOrigin = kDefault_GrSurfaceOrigin;
         desc->fFlags = kRenderTarget_GrSurfaceFlag;
         desc->fConfig = src->config();
         return true;
     }
 
     const GrGLTexture* srcTexture = static_cast<const GrGLTexture*>(src->asTexture());
@@ skipping 18 matching lines @@
         kBGRA_8888_GrPixelConfig == src->config()) {
         // glCopyTexSubImage2D doesn't work with this config. If the bgra can be used with fbo blit
         // then we set up for that, otherwise fail.
         if (this->caps()->isConfigRenderable(kBGRA_8888_GrPixelConfig, false)) {
             desc->fOrigin = originForBlitFramebuffer;
             desc->fFlags = kRenderTarget_GrSurfaceFlag;
             desc->fConfig = kBGRA_8888_GrPixelConfig;
             return true;
         }
         return false;
-    } else if (nullptr == src->asRenderTarget()) {
-        // CopyTexSubImage2D or fbo blit would require creating a temp fbo for the src.
-        return false;
     }
 
-    const GrGLRenderTarget* srcRT = static_cast<const GrGLRenderTarget*>(src->asRenderTarget());
-    if (srcRT && srcRT->renderFBOID() != srcRT->textureFBOID()) {
+    const GrGLRenderTarget* srcRT = static_cast<const GrGLRenderTarget*>(src);
+    if (srcRT->renderFBOID() != srcRT->textureFBOID()) {
         // It's illegal to call CopyTexSubImage2D on a MSAA renderbuffer. Set up for FBO blit or
         // fail.
         if (this->caps()->isConfigRenderable(src->config(), false)) {
             desc->fOrigin = originForBlitFramebuffer;
             desc->fFlags = kRenderTarget_GrSurfaceFlag;
             desc->fConfig = src->config();
             return true;
         }
         return false;
     }
@@ skipping 1028 matching lines @@
         if (GR_GL_TEXTURE_EXTERNAL == glTexture->target() ||
             GR_GL_TEXTURE_RECTANGLE == glTexture->target()) {
             copyParams->fFilter = GrTextureParams::kNone_FilterMode;
             copyParams->fWidth = texture->width();
             copyParams->fHeight = texture->height();
             return true;
         }
     }
     return false;
 }