1 files changed, 290 insertions, 0 deletions
diff --git a/gfx/wr/webrender/src/capture.rs b/gfx/wr/webrender/src/capture.rs
new file mode 100644
index 0000000000..5cc1f90bab
--- /dev/null
+++ b/gfx/wr/webrender/src/capture.rs
@@ -0,0 +1,290 @@
+/* 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/. */
+
+use std::fs::File;
+use std::path::{Path, PathBuf};
+
+use api::{ExternalImageData, ImageDescriptor};
+#[cfg(feature = "png")]
+use api::ImageFormat;
+use api::units::TexelRect;
+#[cfg(feature = "png")]
+use api::units::DeviceIntSize;
+#[cfg(feature = "capture")]
+use crate::print_tree::{PrintableTree, PrintTree};
+use crate::render_api::CaptureBits;
+use ron;
+use serde;
+
+
+#[derive(Clone)]
+pub struct CaptureConfig {
+    pub root: PathBuf,
+    pub bits: CaptureBits,
+    /// Scene sequence ID when capturing multiple frames. Zero for a single frame capture.
+    pub scene_id: u32,
+    /// Frame sequence ID when capturing multiple frames. Zero for a single frame capture.
+    pub frame_id: u32,
+    /// Resource sequence ID when capturing multiple frames. Zero for a single frame capture.
+    pub resource_id: u32,
+    #[cfg(feature = "capture")]
+    pretty: ron::ser::PrettyConfig,
+}
+
+impl CaptureConfig {
+    #[cfg(any(feature = "capture", feature = "replay"))]
+    pub fn new(root: PathBuf, bits: CaptureBits) -> Self {
+        CaptureConfig {
+            root,
+            bits,
+            scene_id: 0,
+            frame_id: 0,
+            resource_id: 0,
+            #[cfg(feature = "capture")]
+            pretty: ron::ser::PrettyConfig::new()
+                .enumerate_arrays(true)
+                .indentor(" ".to_string()),
+        }
+    }
+
+    #[cfg(feature = "capture")]
+    pub fn prepare_scene(&mut self) {
+        use std::fs::create_dir_all;
+        self.scene_id += 1;
+        let _ = create_dir_all(&self.scene_root());
+    }
+
+    #[cfg(feature = "capture")]
+    pub fn prepare_frame(&mut self) {
+        use std::fs::create_dir_all;
+        self.frame_id += 1;
+        let _ = create_dir_all(&self.frame_root());
+    }
+
+    #[cfg(feature = "capture")]
+    pub fn prepare_resource(&mut self) {
+        use std::fs::create_dir_all;
+        self.resource_id += 1;
+        let _ = create_dir_all(&self.resource_root());
+    }
+
+    #[cfg(any(feature = "capture", feature = "replay"))]
+    pub fn scene_root(&self) -> PathBuf {
+        if self.scene_id > 0 {
+            let path = format!("scenes/{:05}", self.scene_id);
+            self.root.join(path)
+        } else {
+            self.root.clone()
+        }
+    }
+
+    #[cfg(any(feature = "capture", feature = "replay"))]
+    pub fn frame_root(&self) -> PathBuf {
+        if self.frame_id > 0 {
+            let path = format!("frames/{:05}", self.frame_id);
+            self.scene_root().join(path)
+        } else {
+            self.root.clone()
+        }
+    }
+
+    #[cfg(any(feature = "capture", feature = "replay"))]
+    pub fn resource_root(&self) -> PathBuf {
+        if self.resource_id > 0 {
+            let path = format!("resources/{:05}", self.resource_id);
+            self.root.join(path)
+        } else {
+            self.root.clone()
+        }
+    }
+
+    #[cfg(feature = "capture")]
+    pub fn serialize_for_scene<T, P>(&self, data: &T, name: P)
+    where
+        T: serde::Serialize,
+        P: AsRef<Path>,
+    {
+        self.serialize(data, self.scene_root(), name)
+    }
+
+    #[cfg(feature = "capture")]
+    pub fn serialize_for_frame<T, P>(&self, data: &T, name: P)
+    where
+        T: serde::Serialize,
+        P: AsRef<Path>,
+    {
+        self.serialize(data, self.frame_root(), name)
+    }
+
+    #[cfg(feature = "capture")]
+    pub fn serialize_for_resource<T, P>(&self, data: &T, name: P)
+    where
+        T: serde::Serialize,
+        P: AsRef<Path>,
+    {
+        self.serialize(data, self.resource_root(), name)
+    }
+
+    #[cfg(feature = "capture")]
+    pub fn file_path_for_frame<P>(&self, name: P, ext: &str) -> PathBuf
+    where P: AsRef<Path> {
+        self.frame_root().join(name).with_extension(ext)
+    }
+
+    #[cfg(feature = "capture")]
+    fn serialize<T, P>(&self, data: &T, path: PathBuf, name: P)
+    where
+        T: serde::Serialize,
+        P: AsRef<Path>,
+    {
+        use std::io::Write;
+        let ron = ron::ser::to_string_pretty(data, self.pretty.clone())
+            .unwrap();
+        let mut file = File::create(path.join(name).with_extension("ron"))
+            .unwrap();
+        write!(file, "{}\n", ron)
+            .unwrap();
+    }
+
+    #[cfg(feature = "capture")]
+    fn serialize_tree<T, P>(data: &T, root: PathBuf, name: P)
+    where
+        T: PrintableTree,
+        P: AsRef<Path>
+    {
+        let path = root
+            .join(name)
+            .with_extension("tree");
+        let file = File::create(path)
+            .unwrap();
+        let mut pt = PrintTree::new_with_sink("", file);
+        data.print_with(&mut pt);
+    }
+
+    #[cfg(feature = "capture")]
+    pub fn serialize_tree_for_frame<T, P>(&self, data: &T, name: P)
+    where
+        T: PrintableTree,
+        P: AsRef<Path>
+    {
+        Self::serialize_tree(data, self.frame_root(), name)
+    }
+
+    #[cfg(feature = "replay")]
+    fn deserialize<T, P>(root: &PathBuf, name: P) -> Option<T>
+    where
+        T: for<'a> serde::Deserialize<'a>,
+        P: AsRef<Path>,
+    {
+        use std::io::Read;
+
+        let mut string = String::new();
+        let path = root
+            .join(name.as_ref())
+            .with_extension("ron");
+        File::open(path)
+            .ok()?
+            .read_to_string(&mut string)
+            .unwrap();
+        match ron::de::from_str(&string) {
+            Ok(out) => Some(out),
+            Err(e) => panic!("File {:?} deserialization failed: {:?}", name.as_ref(), e),
+        }
+    }
+
+    #[cfg(feature = "replay")]
+    pub fn deserialize_for_scene<T, P>(&self, name: P) -> Option<T>
+    where
+        T: for<'a> serde::Deserialize<'a>,
+        P: AsRef<Path>,
+    {
+        Self::deserialize(&self.scene_root(), name)
+    }
+
+    #[cfg(feature = "replay")]
+    pub fn deserialize_for_frame<T, P>(&self, name: P) -> Option<T>
+    where
+        T: for<'a> serde::Deserialize<'a>,
+        P: AsRef<Path>,
+    {
+        Self::deserialize(&self.frame_root(), name)
+    }
+
+    #[cfg(feature = "replay")]
+    pub fn deserialize_for_resource<T, P>(&self, name: P) -> Option<T>
+    where
+        T: for<'a> serde::Deserialize<'a>,
+        P: AsRef<Path>,
+    {
+        Self::deserialize(&self.resource_root(), name)
+    }
+
+    #[cfg(feature = "png")]
+    pub fn save_png(
+        path: PathBuf, size: DeviceIntSize, format: ImageFormat, stride: Option<i32>, data: &[u8],
+    ) {
+        use png::{BitDepth, ColorType, Encoder};
+        use std::io::BufWriter;
+        use std::borrow::Cow;
+
+        // `png` expects
+        let data = match stride {
+            Some(stride) if stride != format.bytes_per_pixel() * size.width => {
+                let mut unstrided = Vec::new();
+                for y in 0..size.height {
+                    let start = (y * stride) as usize;
+                    unstrided.extend_from_slice(&data[start..start+(size.width * format.bytes_per_pixel()) as usize]);
+                }
+                Cow::from(unstrided)
+            }
+            _ => Cow::from(data),
+        };
+
+        let color_type = match format {
+            ImageFormat::RGBA8 => ColorType::RGBA,
+            ImageFormat::BGRA8 => {
+                warn!("Unable to swizzle PNG of BGRA8 type");
+                ColorType::RGBA
+            },
+            ImageFormat::R8 => ColorType::Grayscale,
+            ImageFormat::RG8 => ColorType::GrayscaleAlpha,
+            _ => {
+                error!("Unable to save PNG of {:?}", format);
+                return;
+            }
+        };
+        let w = BufWriter::new(File::create(path).unwrap());
+        let mut enc = Encoder::new(w, size.width as u32, size.height as u32);
+        enc.set_color(color_type);
+        enc.set_depth(BitDepth::Eight);
+        enc
+            .write_header()
+            .unwrap()
+            .write_image_data(&*data)
+            .unwrap();
+    }
+}
+
+/// An image that `ResourceCache` is unable to resolve during a capture.
+/// The image has to be transferred to `Renderer` and locked with the
+/// external image handler to get the actual contents and serialize them.
+#[derive(Deserialize, Serialize)]
+pub struct ExternalCaptureImage {
+    pub short_path: String,
+    pub descriptor: ImageDescriptor,
+    pub external: ExternalImageData,
+}
+
+/// A short description of an external image to be saved separately as
+/// "externals/XX.ron", redirecting into a specific texture/blob with
+/// the corresponding UV rectangle.
+#[derive(Deserialize, Serialize)]
+pub struct PlainExternalImage {
+    /// Path to the RON file describing the texel data.
+    pub data: String,
+    /// External image data source.
+    pub external: ExternalImageData,
+    /// UV sub-rectangle of the image.
+    pub uv: TexelRect,
+}