gfx/gl/SharedSurfaceIO.cpp

   1 /* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 4; -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "SharedSurfaceIO.h"
   7
   8 #include "GLContextCGL.h"
   9 #include "MozFramebuffer.h"
  10 #include "mozilla/DebugOnly.h"
  11 #include "mozilla/gfx/MacIOSurface.h"
  12 #include "mozilla/layers/LayersSurfaces.h"  // for SurfaceDescriptor, etc
  13 #include "mozilla/layers/LayersTypes.h"
  14 #include "ScopedGLHelpers.h"
  15
  16 namespace mozilla {
  17 namespace gl {
  18
  19 // -
  20 // Factory
  21
  22 SurfaceFactory_IOSurface::SurfaceFactory_IOSurface(GLContext& gl)
  23     : SurfaceFactory({&gl, SharedSurfaceType::IOSurface,
  24                       layers::TextureType::MacIOSurface, true}),
  25       mMaxDims(gfx::IntSize::Truncate(MacIOSurface::GetMaxWidth(),
  26                                       MacIOSurface::GetMaxHeight())) {}
  27
  28 // -
  29 // Surface
  30
  31 static void BackTextureWithIOSurf(GLContext* const gl, const GLuint tex,
  32                                   MacIOSurface* const ioSurf) {
  33   MOZ_ASSERT(gl->IsCurrent());
  34
  35   ScopedBindTexture texture(gl, tex, LOCAL_GL_TEXTURE_RECTANGLE_ARB);
  36
  37   gl->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
  38                      LOCAL_GL_TEXTURE_MIN_FILTER, LOCAL_GL_LINEAR);
  39   gl->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
  40                      LOCAL_GL_TEXTURE_MAG_FILTER, LOCAL_GL_LINEAR);
  41   gl->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB, LOCAL_GL_TEXTURE_WRAP_S,
  42                      LOCAL_GL_CLAMP_TO_EDGE);
  43   gl->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB, LOCAL_GL_TEXTURE_WRAP_T,
  44                      LOCAL_GL_CLAMP_TO_EDGE);
  45
  46   CGLContextObj cgl = GLContextCGL::Cast(gl)->GetCGLContext();
  47   MOZ_ASSERT(cgl);
  48
  49   ioSurf->CGLTexImageIOSurface2D(gl, cgl, 0);
  50 }
  51
  52 /*static*/
  53 UniquePtr<SharedSurface_IOSurface> SharedSurface_IOSurface::Create(
  54     const SharedSurfaceDesc& desc) {
  55   const auto& size = desc.size;
  56   const RefPtr<MacIOSurface> ioSurf =
  57       MacIOSurface::CreateIOSurface(size.width, size.height, true);
  58   if (!ioSurf) {
  59     NS_WARNING("Failed to create MacIOSurface.");
  60     return nullptr;
  61   }
  62
  63   ioSurf->SetColorSpace(desc.colorSpace);
  64
  65   // -
  66
  67   auto tex = MakeUnique<Texture>(*desc.gl);
  68   BackTextureWithIOSurf(desc.gl, tex->name, ioSurf);
  69
  70   const GLenum target = LOCAL_GL_TEXTURE_RECTANGLE;
  71   auto fb = MozFramebuffer::CreateForBacking(desc.gl, desc.size, 0, false,
  72                                              target, tex->name);
  73   if (!fb) return nullptr;
  74
  75   return AsUnique(
  76       new SharedSurface_IOSurface(desc, std::move(fb), std::move(tex), ioSurf));
  77 }
  78
  79 SharedSurface_IOSurface::SharedSurface_IOSurface(
  80     const SharedSurfaceDesc& desc, UniquePtr<MozFramebuffer> fb,
  81     UniquePtr<Texture> tex, const RefPtr<MacIOSurface>& ioSurf)
  82     : SharedSurface(desc, std::move(fb)),
  83       mTex(std::move(tex)),
  84       mIOSurf(ioSurf) {}
  85
  86 SharedSurface_IOSurface::~SharedSurface_IOSurface() = default;
  87
  88 void SharedSurface_IOSurface::ProducerReleaseImpl() {
  89   const auto& gl = mDesc.gl;
  90   if (!gl) return;
  91   gl->MakeCurrent();
  92   gl->fFlush();
  93 }
  94
  95 Maybe<layers::SurfaceDescriptor>
  96 SharedSurface_IOSurface::ToSurfaceDescriptor() {
  97   const bool isOpaque = false;  // RGBA
  98   return Some(layers::SurfaceDescriptorMacIOSurface(
  99       mIOSurf->GetIOSurfaceID(), isOpaque, mIOSurf->GetYUVColorSpace()));
 100 }
 101
 102 }  // namespace gl
 103 }  // namespace mozilla