Run wrench on travis CI with OSMesa

.travis.yml

@@ -1,4 +1,6 @@
+dist: trusty
 language: rust
+rust: stable
 os:
   - linux
   - osx
@@ -8,12 +10,21 @@ notifications:
   webhooks: http://build.servo.org:54856/travis
 addons:
   apt:
+    sources:
+      - sourceline: 'deb http://apt.llvm.org/trusty/ llvm-toolchain-trusty-3.8 main'
+        keyurl: 'http://apt.llvm.org/llvm-snapshot.gpg.key'
     packages:
       - libgles2-mesa-dev
+      - llvm-3.8-dev
+      - libedit-dev
+before_install:
+  - pip install mako
 script:
   - (cd webrender_traits && cargo test --verbose --features "ipc")
   - (cd webrender_traits && cargo test --verbose)
   - (cd webrender && cargo test --verbose)
   - (cd sample && cargo test --verbose)
   - (cd replay && cargo test --verbose)
   - (cd wrench && cargo test --verbose)
+  - (cd wrench && cargo build --release --verbose --features headless)
+  - (cd wrench && python run_tests.py res/rect.yaml)

wrench/Cargo.toml

@@ -20,6 +20,11 @@ serde = "0.8"
 serde_json = "0.8"
 time = "0.1"
 crossbeam = "0.2"
+osmesa-sys = { version = "0.1.2", optional = true }
+osmesa-src = { git = "https://github.com/servo/osmesa-src", optional = true }
+
+[features]
+headless = [ "osmesa-sys", "osmesa-src" ]
 
 [dependencies.webrender]
 path = "../webrender"

wrench/res/rect.yaml

@@ -0,0 +1,12 @@
+---
+root: 
+  items: 
+    - 
+      bounds: 0 0 1024 768
+      items: 
+        - 
+          bounds: 0 0 1024 768
+          color: green
+          type: rect
+      type: stacking_context
+      z_index: 1

wrench/run_tests.py

@@ -0,0 +1,65 @@
+#!/usr/bin/python
+
+import contextlib
+import os
+import subprocess
+import sys
+import hashlib
+from os import path
+from glob import glob
+
+
+@contextlib.contextmanager
+def cd(new_path):
+    """Context manager for changing the current working directory"""
+    previous_path = os.getcwd()
+    try:
+        os.chdir(new_path)
+        yield
+    finally:
+        os.chdir(previous_path)
+
+
+def find_dep_path_newest(package, bin_path):
+    deps_path = path.join(path.split(bin_path)[0], "build")
+    with cd(deps_path):
+        candidates = glob(package + '-*')
+    candidates = (path.join(deps_path, c) for c in candidates)
+    candidate_times = sorted(((path.getmtime(c), c) for c in candidates), reverse=True)
+    if len(candidate_times) > 0:
+        return candidate_times[0][1]
+    return None
+
+
+def is_windows():
+    """ Detect windows, mingw, cygwin """
+    return sys.platform == 'win32' or sys.platform == 'msys' or sys.platform == 'cygwin'
+
+
+def is_macosx():
+    return sys.platform == 'darwin'
+
+
+def is_linux():
+    return sys.platform.startswith('linux')
+
+
+def set_osmesa_env(bin_path):
+    """Set proper LD_LIBRARY_PATH and DRIVE for software rendering on Linux and OSX"""
+    if is_linux():
+        osmesa_path = path.join(find_dep_path_newest('osmesa-src', bin_path), "out", "lib", "gallium")
+        print(osmesa_path)
+        os.environ["LD_LIBRARY_PATH"] = osmesa_path
+        os.environ["GALLIUM_DRIVER"] = "softpipe"
+    elif is_macosx():
+        osmesa_path = path.join(find_dep_path_newest('osmesa-src', bin_path),
+                                "out", "src", "gallium", "targets", "osmesa", ".libs")
+        glapi_path = path.join(find_dep_path_newest('osmesa-src', bin_path),
+                               "out", "src", "mapi", "shared-glapi", ".libs")
+        os.environ["DYLD_LIBRARY_PATH"] = osmesa_path + ":" + glapi_path
+        os.environ["GALLIUM_DRIVER"] = "softpipe"
+
+
+set_osmesa_env('../target/release/')
+subprocess.check_call(['../target/release/wrench', '-t', '1', '-h', 'show', sys.argv[1]])
+print('md5 = ' + hashlib.md5(open('screenshot.png', 'rb').read()).hexdigest())

wrench/src/args.yaml

@@ -24,6 +24,10 @@ args:
       short: a
       long: subpixel-aa
       help: Enable subpixel aa
+  - headless:
+      short: h
+      long: headless
+      help: Enable headless rendering
   - dp_ratio:
       short: p
       long: device-pixel-ratio