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 bool 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   return ioSurf->BindTexImage(gl, 0);
  47 }
  48
  49 /*static*/
  50 UniquePtr<SharedSurface_IOSurface> SharedSurface_IOSurface::Create(
  51     const SharedSurfaceDesc& desc) {
  52   const auto& size = desc.size;
  53   const RefPtr<MacIOSurface> ioSurf =
  54       MacIOSurface::CreateIOSurface(size.width, size.height, true);
  55   if (!ioSurf) {
  56     NS_WARNING("Failed to create MacIOSurface.");
  57     return nullptr;
  58   }
  59
  60   ioSurf->SetColorSpace(desc.colorSpace);
  61
  62   // -
  63
  64   auto tex = MakeUnique<Texture>(*desc.gl);
  65   if (!BackTextureWithIOSurf(desc.gl, tex->name, ioSurf)) {
  66     return nullptr;
  67   }
  68
  69   const GLenum target = LOCAL_GL_TEXTURE_RECTANGLE;
  70   auto fb = MozFramebuffer::CreateForBacking(desc.gl, desc.size, 0, false,
  71                                              target, tex->name);
  72   if (!fb) return nullptr;
  73
  74   return AsUnique(
  75       new SharedSurface_IOSurface(desc, std::move(fb), std::move(tex), ioSurf));
  76 }
  77
  78 SharedSurface_IOSurface::SharedSurface_IOSurface(
  79     const SharedSurfaceDesc& desc, UniquePtr<MozFramebuffer> fb,
  80     UniquePtr<Texture> tex, const RefPtr<MacIOSurface>& ioSurf)
  81     : SharedSurface(desc, std::move(fb)),
  82       mTex(std::move(tex)),
  83       mIOSurf(ioSurf) {}
  84
  85 SharedSurface_IOSurface::~SharedSurface_IOSurface() = default;
  86
  87 void SharedSurface_IOSurface::ProducerReleaseImpl() {
  88   const auto& gl = mDesc.gl;
  89   if (!gl) return;
  90   gl->MakeCurrent();
  91   gl->fFlush();
  92 }
  93
  94 Maybe<layers::SurfaceDescriptor>
  95 SharedSurface_IOSurface::ToSurfaceDescriptor() {
  96   const bool isOpaque = false;  // RGBA
  97   return Some(layers::SurfaceDescriptorMacIOSurface(
  98       mIOSurf->GetIOSurfaceID(), isOpaque, mIOSurf->GetYUVColorSpace()));
  99 }
 100
 101 }  // namespace gl
 102 }  // namespace mozilla