Bug 1639574 - Disable color management for CSS due to issues with canvas. r=jrmuizel

Differential Revision: https://phabricator.services.mozilla.com/D76859

gfx/thebes/gfxPlatform.cpp

@@ -2095,6 +2095,11 @@ eCMSMode gfxPlatform::GetCMSMode() {
   return gCMSMode;
 }
 
+void gfxPlatform::SetCMSModeOverride(eCMSMode aMode) {
+  MOZ_ASSERT(gCMSInitialized);
+  gCMSMode = aMode;
+}
+
 int gfxPlatform::GetRenderingIntent() {
   // StaticPrefList.yaml is using 0 as the default for the rendering
   // intent preference, based on that being the value for

gfx/thebes/gfxPlatform.h

@@ -506,6 +506,11 @@ class gfxPlatform : public mozilla::layers::MemoryPressureListener {
    */
   static eCMSMode GetCMSMode();
 
+  /**
+   * Used only for testing. Override the pref setting.
+   */
+  static void SetCMSModeOverride(eCMSMode aMode);
+
   /**
    * Determines the rendering intent for color management.
    *

image/test/gtest/Common.cpp

@@ -52,6 +52,9 @@ AutoInitializeImageLib::AutoInitializeImageLib() {
   // Ensure gfxPlatform is initialized.
   gfxPlatform::GetPlatform();
 
+  // Ensure we always color manage images with gtests.
+  gfxPlatform::SetCMSModeOverride(eCMSMode_All);
+
   // Depending on initialization order, it is possible that our pref changes
   // have not taken effect yet because there are pending gfx-related events on
   // the main thread.

modules/libpref/init/StaticPrefList.yaml

@@ -3750,7 +3750,7 @@
 # See eCMSMode in gfx/thebes/gfxPlatform.h.
 - name: gfx.color_management.mode
   type: RelaxedAtomicInt32
-  value: 1
+  value: 2
   mirror: always
 
 # The zero default here should match QCMS_INTENT_DEFAULT from qcms.h

testing/profiles/reftest/user.js

@@ -41,7 +41,7 @@ user_pref("extensions.getAddons.cache.enabled", false);
 user_pref("extensions.getAddons.get.url", "http://localhost/extensions-dummy/repositoryGetURL");
 user_pref("extensions.systemAddon.update.url", "http://localhost/dummy-system-addons.xml");
 user_pref("gfx.color_management.force_srgb", true);
-user_pref("gfx.color_management.mode", 1);
+user_pref("gfx.color_management.mode", 2);
 user_pref("gfx.logging.level", 1);
 // Disable downscale-during-decode, since it makes reftests more difficult.
 user_pref("image.downscale-during-decode.enabled", false);