1 files changed, 72 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/ImageBuffer.cpp b/Source/WebCore/platform/graphics/ImageBuffer.cpp
new file mode 100644
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+++ b/Source/WebCore/platform/graphics/ImageBuffer.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "ImageBuffer.h"
+
+#if !PLATFORM(CG)
+
+#include <math.h>
+
+namespace WebCore {
+
+void ImageBuffer::transformColorSpace(ColorSpace srcColorSpace, ColorSpace dstColorSpace)
+{
+    if (srcColorSpace == dstColorSpace)
+        return;
+
+    // only sRGB <-> linearRGB are supported at the moment
+    if ((srcColorSpace != ColorSpaceLinearRGB && srcColorSpace != ColorSpaceDeviceRGB) 
+        || (dstColorSpace != ColorSpaceLinearRGB && dstColorSpace != ColorSpaceDeviceRGB))
+        return;
+
+    if (dstColorSpace == ColorSpaceLinearRGB) {
+        if (m_linearRgbLUT.isEmpty()) {
+            for (unsigned i = 0; i < 256; i++) {
+                float color = i  / 255.0f;
+                color = (color <= 0.04045f ? color / 12.92f : pow((color + 0.055f) / 1.055f, 2.4f));
+                color = std::max(0.0f, color);
+                color = std::min(1.0f, color);
+                m_linearRgbLUT.append(static_cast<int>(color * 255));
+            }
+        }
+        platformTransformColorSpace(m_linearRgbLUT);
+    } else if (dstColorSpace == ColorSpaceDeviceRGB) {
+        if (m_deviceRgbLUT.isEmpty()) {
+            for (unsigned i = 0; i < 256; i++) {
+                float color = i / 255.0f;
+                color = (powf(color, 1.0f / 2.4f) * 1.055f) - 0.055f;
+                color = std::max(0.0f, color);
+                color = std::min(1.0f, color);
+                m_deviceRgbLUT.append(static_cast<int>(color * 255));
+            }
+        }
+        platformTransformColorSpace(m_deviceRgbLUT);
+    }
+}
+
+}
+
+#endif // PLATFORM(CG)