Add m-esr52 at 52.6.0

1 files changed, 248 insertions, 0 deletions

diff --git a/gfx/gl/SharedSurfaceIO.cpp b/gfx/gl/SharedSurfaceIO.cpp
new file mode 100644
index 000000000..50262d6cc
--- /dev/null
+++ b/gfx/gl/SharedSurfaceIO.cpp
@@ -0,0 +1,248 @@
+/* -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40; -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "SharedSurfaceIO.h"
+
+#include "GLContextCGL.h"
+#include "mozilla/DebugOnly.h"
+#include "mozilla/gfx/MacIOSurface.h"
+#include "mozilla/layers/LayersSurfaces.h"  // for SurfaceDescriptor, etc
+#include "ScopedGLHelpers.h"
+
+namespace mozilla {
+namespace gl {
+
+/*static*/ UniquePtr<SharedSurface_IOSurface>
+SharedSurface_IOSurface::Create(const RefPtr<MacIOSurface>& ioSurf,
+                                GLContext* gl,
+                                bool hasAlpha)
+{
+    MOZ_ASSERT(ioSurf);
+    MOZ_ASSERT(gl);
+
+    auto size = gfx::IntSize::Truncate(ioSurf->GetWidth(), ioSurf->GetHeight());
+
+    typedef SharedSurface_IOSurface ptrT;
+    UniquePtr<ptrT> ret( new ptrT(ioSurf, gl, size, hasAlpha) );
+    return Move(ret);
+}
+
+void
+SharedSurface_IOSurface::ProducerReleaseImpl()
+{
+    mGL->MakeCurrent();
+    mGL->fFlush();
+}
+
+bool
+SharedSurface_IOSurface::CopyTexImage2D(GLenum target, GLint level, GLenum internalformat,
+                                        GLint x, GLint y, GLsizei width, GLsizei height,
+                                        GLint border)
+{
+    /* Bug 896693 - OpenGL framebuffers that are backed by IOSurface on OSX expose a bug
+     * in glCopyTexImage2D --- internalformats GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA
+     * return the wrong results. To work around, copy framebuffer to a temporary texture
+     * using GL_RGBA (which works), attach as read framebuffer and glCopyTexImage2D
+     * instead.
+     */
+
+    // https://www.opengl.org/sdk/docs/man3/xhtml/glCopyTexImage2D.xml says that width or
+    // height set to 0 results in a NULL texture. Lets not do any work and punt to
+    // original glCopyTexImage2D, since the FBO below will fail when trying to attach a
+    // texture of 0 width or height.
+    if (width == 0 || height == 0)
+        return false;
+
+    switch (internalformat) {
+    case LOCAL_GL_ALPHA:
+    case LOCAL_GL_LUMINANCE:
+    case LOCAL_GL_LUMINANCE_ALPHA:
+        break;
+
+    default:
+        return false;
+    }
+
+    MOZ_ASSERT(mGL->IsCurrent());
+
+    ScopedTexture destTex(mGL);
+    {
+        ScopedBindTexture bindTex(mGL, destTex.Texture());
+        mGL->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MIN_FILTER,
+                            LOCAL_GL_NEAREST);
+        mGL->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MAG_FILTER,
+                            LOCAL_GL_NEAREST);
+        mGL->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_S,
+                            LOCAL_GL_CLAMP_TO_EDGE);
+        mGL->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_T,
+                            LOCAL_GL_CLAMP_TO_EDGE);
+        mGL->raw_fCopyTexImage2D(LOCAL_GL_TEXTURE_2D, 0, LOCAL_GL_RGBA, x, y, width,
+                                 height, 0);
+    }
+
+    ScopedFramebufferForTexture tmpFB(mGL, destTex.Texture(), LOCAL_GL_TEXTURE_2D);
+    ScopedBindFramebuffer bindFB(mGL, tmpFB.FB());
+    mGL->raw_fCopyTexImage2D(target, level, internalformat, x, y, width, height, border);
+
+    return true;
+}
+
+bool
+SharedSurface_IOSurface::ReadPixels(GLint x, GLint y, GLsizei width, GLsizei height,
+                                    GLenum format, GLenum type, GLvoid* pixels)
+{
+    // Calling glReadPixels when an IOSurface is bound to the current framebuffer
+    // can cause corruption in following glReadPixel calls (even if they aren't
+    // reading from an IOSurface).
+    // We workaround this by copying to a temporary texture, and doing the readback
+    // from that.
+    MOZ_ASSERT(mGL->IsCurrent());
+
+    ScopedTexture destTex(mGL);
+    {
+        ScopedFramebufferForTexture srcFB(mGL, ProdTexture(), ProdTextureTarget());
+
+        ScopedBindFramebuffer bindFB(mGL, srcFB.FB());
+        ScopedBindTexture bindTex(mGL, destTex.Texture());
+        mGL->raw_fCopyTexImage2D(LOCAL_GL_TEXTURE_2D, 0,
+                                 mHasAlpha ? LOCAL_GL_RGBA : LOCAL_GL_RGB,
+                                 x, y,
+                                 width, height, 0);
+    }
+
+    ScopedFramebufferForTexture destFB(mGL, destTex.Texture());
+
+    ScopedBindFramebuffer bindFB(mGL, destFB.FB());
+    mGL->raw_fReadPixels(0, 0, width, height, format, type, pixels);
+    return true;
+}
+
+static void
+BackTextureWithIOSurf(GLContext* gl, GLuint tex, MacIOSurface* ioSurf)
+{
+    MOZ_ASSERT(gl->IsCurrent());
+
+    ScopedBindTexture texture(gl, tex, LOCAL_GL_TEXTURE_RECTANGLE_ARB);
+
+    gl->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
+                        LOCAL_GL_TEXTURE_MIN_FILTER,
+                        LOCAL_GL_LINEAR);
+    gl->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
+                        LOCAL_GL_TEXTURE_MAG_FILTER,
+                        LOCAL_GL_LINEAR);
+    gl->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
+                        LOCAL_GL_TEXTURE_WRAP_S,
+                        LOCAL_GL_CLAMP_TO_EDGE);
+    gl->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
+                        LOCAL_GL_TEXTURE_WRAP_T,
+                        LOCAL_GL_CLAMP_TO_EDGE);
+
+    CGLContextObj cgl = GLContextCGL::Cast(gl)->GetCGLContext();
+    MOZ_ASSERT(cgl);
+
+    ioSurf->CGLTexImageIOSurface2D(cgl);
+}
+
+SharedSurface_IOSurface::SharedSurface_IOSurface(const RefPtr<MacIOSurface>& ioSurf,
+                                                 GLContext* gl,
+                                                 const gfx::IntSize& size,
+                                                 bool hasAlpha)
+  : SharedSurface(SharedSurfaceType::IOSurface,
+                  AttachmentType::GLTexture,
+                  gl,
+                  size,
+                  hasAlpha,
+                  true)
+  , mIOSurf(ioSurf)
+{
+    gl->MakeCurrent();
+    mProdTex = 0;
+    gl->fGenTextures(1, &mProdTex);
+    BackTextureWithIOSurf(gl, mProdTex, mIOSurf);
+}
+
+SharedSurface_IOSurface::~SharedSurface_IOSurface()
+{
+    if (!mGL || !mGL->MakeCurrent())
+        return;
+
+    mGL->fDeleteTextures(1, &mProdTex);
+}
+
+bool
+SharedSurface_IOSurface::ToSurfaceDescriptor(layers::SurfaceDescriptor* const out_descriptor)
+{
+    bool isOpaque = !mHasAlpha;
+    *out_descriptor = layers::SurfaceDescriptorMacIOSurface(mIOSurf->GetIOSurfaceID(),
+                                                            mIOSurf->GetContentsScaleFactor(),
+                                                            isOpaque);
+    return true;
+}
+
+bool
+SharedSurface_IOSurface::ReadbackBySharedHandle(gfx::DataSourceSurface* out_surface)
+{
+    MOZ_ASSERT(out_surface);
+    mIOSurf->Lock();
+    size_t bytesPerRow = mIOSurf->GetBytesPerRow();
+    size_t ioWidth = mIOSurf->GetDevicePixelWidth();
+    size_t ioHeight = mIOSurf->GetDevicePixelHeight();
+
+    const unsigned char* ioData = (unsigned char*)mIOSurf->GetBaseAddress();
+    gfx::DataSourceSurface::ScopedMap map(out_surface, gfx::DataSourceSurface::WRITE);
+    if (!map.IsMapped()) {
+        mIOSurf->Unlock();
+        return false;
+    }
+
+    for (size_t i = 0; i < ioHeight; i++) {
+        memcpy(map.GetData() + i * map.GetStride(),
+               ioData + i * bytesPerRow, ioWidth * 4);
+    }
+
+    mIOSurf->Unlock();
+    return true;
+}
+
+////////////////////////////////////////////////////////////////////////
+// SurfaceFactory_IOSurface
+
+/*static*/ UniquePtr<SurfaceFactory_IOSurface>
+SurfaceFactory_IOSurface::Create(GLContext* gl, const SurfaceCaps& caps,
+                                 const RefPtr<layers::LayersIPCChannel>& allocator,
+                                 const layers::TextureFlags& flags)
+{
+    auto maxDims = gfx::IntSize::Truncate(MacIOSurface::GetMaxWidth(),
+                                          MacIOSurface::GetMaxHeight());
+
+    typedef SurfaceFactory_IOSurface ptrT;
+    UniquePtr<ptrT> ret( new ptrT(gl, caps, allocator, flags, maxDims) );
+    return Move(ret);
+}
+
+UniquePtr<SharedSurface>
+SurfaceFactory_IOSurface::CreateShared(const gfx::IntSize& size)
+{
+    if (size.width > mMaxDims.width ||
+        size.height > mMaxDims.height)
+    {
+        return nullptr;
+    }
+
+    bool hasAlpha = mReadCaps.alpha;
+    RefPtr<MacIOSurface> ioSurf;
+    ioSurf = MacIOSurface::CreateIOSurface(size.width, size.height, 1.0,
+                                           hasAlpha);
+
+    if (!ioSurf) {
+        NS_WARNING("Failed to create MacIOSurface.");
+        return nullptr;
+    }
+
+    return SharedSurface_IOSurface::Create(ioSurf, mGL, hasAlpha);
+}
+
+} // namespace gl
+} // namespace mozilla