1 files changed, 171 insertions, 0 deletions
diff --git a/widget/cocoa/RectTextureImage.mm b/widget/cocoa/RectTextureImage.mm
new file mode 100644
index 0000000000..c67af97d0a
--- /dev/null
+++ b/widget/cocoa/RectTextureImage.mm
@@ -0,0 +1,171 @@
+/* -*- Mode: objc; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "RectTextureImage.h"
+
+#include "gfxUtils.h"
+#include "GLContextCGL.h"
+#include "mozilla/layers/GLManager.h"
+#include "mozilla/gfx/MacIOSurface.h"
+#include "OGLShaderProgram.h"
+#include "ScopedGLHelpers.h"
+
+namespace mozilla {
+namespace widget {
+
+RectTextureImage::RectTextureImage()
+  : mGLContext(nullptr)
+  , mTexture(0)
+  , mInUpdate(false)
+{
+}
+
+RectTextureImage::~RectTextureImage()
+{
+  DeleteTexture();
+}
+
+already_AddRefed<gfx::DrawTarget>
+RectTextureImage::BeginUpdate(const LayoutDeviceIntSize& aNewSize,
+                              const LayoutDeviceIntRegion& aDirtyRegion)
+{
+  MOZ_ASSERT(!mInUpdate, "Beginning update during update!");
+  mUpdateRegion = aDirtyRegion;
+  bool needRecreate = false;
+  if (aNewSize != mBufferSize) {
+    mBufferSize = aNewSize;
+    mUpdateRegion =
+      LayoutDeviceIntRect(LayoutDeviceIntPoint(0, 0), aNewSize);
+    needRecreate = true;
+  }
+
+  if (mUpdateRegion.IsEmpty()) {
+    return nullptr;
+  }
+
+  if (!mIOSurface || needRecreate) {
+    DeleteTexture();
+    mIOSurface = MacIOSurface::CreateIOSurface(mBufferSize.width,
+                                               mBufferSize.height);
+
+    if (!mIOSurface) {
+      return nullptr;
+    }
+  }
+
+  mInUpdate = true;
+
+  mIOSurface->Lock(false);
+  unsigned char* ioData = (unsigned char*)mIOSurface->GetBaseAddress();
+  gfx::IntSize size(mBufferSize.width, mBufferSize.height);
+  int32_t stride = mIOSurface->GetBytesPerRow();
+  gfx::SurfaceFormat format = gfx::SurfaceFormat::B8G8R8A8;
+  RefPtr<gfx::DrawTarget> drawTarget =
+    gfx::Factory::CreateDrawTargetForData(gfx::BackendType::SKIA,
+                                          ioData, size,
+                                          stride, format);
+  return drawTarget.forget();
+}
+
+void
+RectTextureImage::EndUpdate()
+{
+  MOZ_ASSERT(mInUpdate, "Ending update while not in update");
+  mIOSurface->Unlock(false);
+  mInUpdate = false;
+}
+
+void
+RectTextureImage::UpdateFromCGContext(const LayoutDeviceIntSize& aNewSize,
+                                      const LayoutDeviceIntRegion& aDirtyRegion,
+                                      CGContextRef aCGContext)
+{
+  gfx::IntSize size = gfx::IntSize(CGBitmapContextGetWidth(aCGContext),
+                                   CGBitmapContextGetHeight(aCGContext));
+  RefPtr<gfx::DrawTarget> dt = BeginUpdate(aNewSize, aDirtyRegion);
+  if (dt) {
+    gfx::Rect rect(0, 0, size.width, size.height);
+    gfxUtils::ClipToRegion(dt, GetUpdateRegion().ToUnknownRegion());
+    RefPtr<gfx::SourceSurface> sourceSurface =
+      dt->CreateSourceSurfaceFromData(static_cast<uint8_t *>(CGBitmapContextGetData(aCGContext)),
+                                      size,
+                                      CGBitmapContextGetBytesPerRow(aCGContext),
+                                      gfx::SurfaceFormat::B8G8R8A8);
+    dt->DrawSurface(sourceSurface, rect, rect,
+                    gfx::DrawSurfaceOptions(),
+                    gfx::DrawOptions(1.0, gfx::CompositionOp::OP_SOURCE));
+    dt->PopClip();
+    EndUpdate();
+  }
+}
+
+void
+RectTextureImage::Draw(layers::GLManager* aManager,
+                       const LayoutDeviceIntPoint& aLocation,
+                       const gfx::Matrix4x4& aTransform)
+{
+  gl::GLContext* gl = aManager->gl();
+
+  BindIOSurfaceToTexture(gl);
+
+  layers::ShaderProgramOGL* program =
+    aManager->GetProgram(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
+                         gfx::SurfaceFormat::R8G8B8A8);
+
+  gl->fActiveTexture(LOCAL_GL_TEXTURE0);
+  gl::ScopedBindTexture texture(gl, mTexture, LOCAL_GL_TEXTURE_RECTANGLE_ARB);
+
+  aManager->ActivateProgram(program);
+  program->SetProjectionMatrix(aManager->GetProjMatrix());
+  program->SetLayerTransform(gfx::Matrix4x4(aTransform).PostTranslate(aLocation.x, aLocation.y, 0));
+  program->SetTextureTransform(gfx::Matrix4x4());
+  program->SetRenderOffset(nsIntPoint(0, 0));
+  program->SetTexCoordMultiplier(mBufferSize.width, mBufferSize.height);
+  program->SetTextureUnit(0);
+
+  aManager->BindAndDrawQuad(program,
+                            gfx::Rect(0.0, 0.0, mBufferSize.width, mBufferSize.height),
+                            gfx::Rect(0.0, 0.0, 1.0f, 1.0f));
+}
+
+void
+RectTextureImage::DeleteTexture()
+{
+  if (mTexture) {
+    MOZ_ASSERT(mGLContext);
+    mGLContext->MakeCurrent();
+    mGLContext->fDeleteTextures(1, &mTexture);
+    mTexture = 0;
+  }
+}
+
+void
+RectTextureImage::BindIOSurfaceToTexture(gl::GLContext* aGL)
+{
+  if (!mTexture) {
+    MOZ_ASSERT(aGL);
+    aGL->fGenTextures(1, &mTexture);
+    aGL->fActiveTexture(LOCAL_GL_TEXTURE0);
+    gl::ScopedBindTexture texture(aGL, mTexture, LOCAL_GL_TEXTURE_RECTANGLE_ARB);
+    aGL->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
+                        LOCAL_GL_TEXTURE_MIN_FILTER,
+                        LOCAL_GL_LINEAR);
+    aGL->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
+                        LOCAL_GL_TEXTURE_MAG_FILTER,
+                        LOCAL_GL_LINEAR);
+    aGL->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
+                        LOCAL_GL_TEXTURE_WRAP_T,
+                        LOCAL_GL_CLAMP_TO_EDGE);
+    aGL->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
+                        LOCAL_GL_TEXTURE_WRAP_S,
+                        LOCAL_GL_CLAMP_TO_EDGE);
+
+    mIOSurface->CGLTexImageIOSurface2D(gl::GLContextCGL::Cast(aGL)->GetCGLContext());
+    mGLContext = aGL;
+  }
+}
+
+} // namespace widget
+} // namespace mozilla