[qcms] Add a qcms_profile_get_white_point() api

BUG=565222

Review URL: https://codereview.chromium.org/1550513002

Cr-Commit-Position: refs/heads/master@{#366818}

3 files changed, 22 insertions, 0 deletions

diff --git a/third_party/qcms/README.chromium b/third_party/qcms/README.chromium
index 4139e67..e7211bd 100644
--- a/third_party/qcms/README.chromium
+++ b/third_party/qcms/README.chromium
@@ -127,6 +127,8 @@ The following changes have been made since qcms was imported:
    - http://code.google.com/p/chromium/issues/detail?id=565222
  - Add an API to check for profile media white point
    - http://code.google.com/p/chromium/issues/detail?id=565222
+ - Add a qcms_profile_get_white_point() api
+   - http://code.google.com/p/chromium/issues/detail?id=565222
 
 For the Chromium changes, since the import, in a patch format run:
   git diff b8456f38 src
diff --git a/third_party/qcms/src/iccread.c b/third_party/qcms/src/iccread.c
index 183840e..61b5312 100644
--- a/third_party/qcms/src/iccread.c
+++ b/third_party/qcms/src/iccread.c
@@ -348,6 +348,19 @@ qcms_bool qcms_profile_has_white_point(qcms_profile *profile)
     return (wp.X != 0) && (wp.Y != 0) && (wp.Z != 0);
 }
 
+qcms_xyz_float qcms_profile_get_white_point(qcms_profile *profile)
+{
+    qcms_xyz_float wp = { 0.0f, 0.0f, 0.0f };
+
+    if (qcms_profile_has_white_point(profile)) {
+        wp.X = s15Fixed16Number_to_float(profile->mediaWhitePoint.X);
+        wp.Y = s15Fixed16Number_to_float(profile->mediaWhitePoint.Y);
+        wp.Z = s15Fixed16Number_to_float(profile->mediaWhitePoint.Z);
+    }
+
+    return wp;
+}
+
 #define TAG_bXYZ 0x6258595a
 #define TAG_gXYZ 0x6758595a
 #define TAG_rXYZ 0x7258595a
diff --git a/third_party/qcms/src/qcms.h b/third_party/qcms/src/qcms.h
index 790d2bc..4805375 100644
--- a/third_party/qcms/src/qcms.h
+++ b/third_party/qcms/src/qcms.h
@@ -95,6 +95,12 @@ typedef struct {
 	qcms_CIE_xyY blue;
 } qcms_CIE_xyYTRIPLE;
 
+typedef struct {
+	float X;
+	float Y;
+	float Z;
+} qcms_xyz_float;
+
 qcms_profile* qcms_profile_create_rgb_with_gamma(
 		qcms_CIE_xyY white_point,
 		qcms_CIE_xyYTRIPLE primaries,
@@ -112,6 +118,7 @@ void qcms_profile_release(qcms_profile *profile);
 
 qcms_bool qcms_profile_is_bogus(qcms_profile *profile);
 qcms_bool qcms_profile_has_white_point(qcms_profile *profile);
+qcms_xyz_float qcms_profile_get_white_point(qcms_profile *profile);
 qcms_intent qcms_profile_get_rendering_intent(qcms_profile *profile);
 qcms_color_space qcms_profile_get_color_space(qcms_profile *profile);
 unsigned qcms_profile_get_version(qcms_profile *profile);