[poc] curve-filter

third_party/WebKit/Source/platform/graphics/GraphicsScreen.cpp

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "platform/graphics/GraphicsScreen.h"
+
+#include "platform/PlatformExport.h"
+#include "platform/RuntimeEnabledFeatures.h"
+#include "platform/graphics/ColorSpaceProfile.h"
+#include "wtf/HashMap.h"
+#include "wtf/MainThread.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+#if USE(QCMSLIB)
+
+class ColorProfileCache {
+public:
+    ColorProfileCache()
+    {
+        qcms_profile* srgbColorProfile = qcms_profile_sRGB();
+
+        if (srgbColorProfile)
+            qcms_profile_precache_output_transform(srgbColorProfile);
+
+        RELEASE_ASSERT(srgbColorProfile);
+
+        m_srgbColorProfile = ColorSpaceProfile::create(srgbColorProfile);
+    }
+
+    PassRefPtr<ColorSpaceProfile> sRGBColorProfile() const
+    {
+        return m_srgbColorProfile;
+    }
+
+    void set(uintptr_t id, PassRefPtr<ColorSpaceProfile> profile)
+    {
+        RELEASE_ASSERT(id && profile->profile());
+
+        m_colorProfiles.set(id, profile);
+    }
+
+    PassRefPtr<ColorSpaceProfile> find(uintptr_t id) const
+    {
+        if (!id)
+            return sRGBColorProfile();
+
+        HashMap<uintptr_t, RefPtr<ColorSpaceProfile>>::const_iterator it = m_colorProfiles.find(id);
+        return it != m_colorProfiles.end() ? it->value : nullptr;
+    }
+
+    void remove(uintptr_t id)
+    {
+        RELEASE_ASSERT(id); // You cannot remove the default sRGB color profile.
+
+        m_colorProfiles.remove(id);
+    }
+
+private:
+    HashMap<uintptr_t, RefPtr<ColorSpaceProfile>> m_colorProfiles;
+
+    RefPtr<ColorSpaceProfile> m_srgbColorProfile;
+};
+
+static ColorProfileCache& screenColorProfileCache()
+{
+    DEFINE_STATIC_LOCAL(ColorProfileCache, cache, ());
+    RELEASE_ASSERT(isMainThread());
+    return cache;
+}
+
+static bool invalidRGBColorProfile(qcms_profile* deviceProfile)
+{
+    if (rgbData != qcms_profile_get_color_space(deviceProfile))
+        return true;
+
+    if (qcms_profile_is_bogus(deviceProfile))
+        return true;
+
+    RefPtr<ColorSpaceProfile> source = screenColorProfileCache().sRGBColorProfile();
+
+    qcms_transform* transform = qcms_transform_create(source->profile(), QCMS_DATA_RGBA_8, deviceProfile, QCMS_DATA_RGBA_8, QCMS_INTENT_PERCEPTUAL);
+    if (!transform)
+        return true;
+
+    bool usable = qcms_transform_is_matrix(transform);
+    qcms_transform_release(transform);
+
+    return !usable;
+}
+
+void setScreenColorProfile(uintptr_t id, const char* profile, size_t size)
+{
+    const size_t minimumColorProfileSize = 128;
+
+    qcms_profile* deviceProfile = nullptr;
+
+    if (profile && size > minimumColorProfileSize)
+        deviceProfile = qcms_profile_from_memory(profile, size);
+
+    if (deviceProfile && invalidRGBColorProfile(deviceProfile)) {
+        qcms_profile_release(deviceProfile);
+        deviceProfile = nullptr;
+    }
+
+    if (!deviceProfile)
+        deviceProfile = qcms_profile_sRGB();
+
+    if (deviceProfile)
+        qcms_profile_precache_output_transform(deviceProfile);
+
+    fprintf(stderr, "setScreenColorProfile [%s] page %ld\n", deviceProfile ? qcms_profile_get_description(deviceProfile) : "(null profile)", (long int)id);
+
+    screenColorProfileCache().set(id, ColorSpaceProfile::create(deviceProfile));
+}
+
+PassRefPtr<ColorSpaceProfile> screenColorProfile(uintptr_t id)
+{
+    if (!imageColorProfilesEnabled())
+        return nullptr;
+
+    return screenColorProfileCache().find(id);
+}
+
+void removeScreenColorProfile(uintptr_t id)
+{
+    screenColorProfileCache().remove(id);
+}
+
+bool imageColorProfilesEnabled()
+{
+    return RuntimeEnabledFeatures::imageColorProfilesEnabled();
+}
+
+#else
+
+void setScreenColorProfile(uintptr_t, const char*, size_t)
+{
+}
+
+PassRefPtr<ColorSpaceProfile> screenColorProfile(uintptr_t)
+{
+    return nullptr;
+}
+
+void removeScreenColorProfile(uintptr_t)
+{
+}
+
+bool imageColorProfilesEnabled()
+{
+    return false;
+}
+
+#endif // USE(QCMSLIB)
+
+static uintptr_t s_screenId;
+
+uintptr_t setCurrentScreenId(uintptr_t id)
+{
+    uintptr_t previous = s_screenId;
+    s_screenId = id;
+    return previous;
+}
+
+uintptr_t currentScreenId()
+{
+    return s_screenId;
+}
+
+} // namespace blink