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/*
* Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
*
* 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 THE COPYRIGHT HOLDER “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 THE COPYRIGHT HOLDER 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"
#if ENABLE(CSS_SHADERS)
#include "CustomFilterProgramInfo.h"
#include <wtf/HashFunctions.h>
#include <wtf/text/StringHash.h>
namespace WebCore {
static unsigned hashPossiblyNullString(const String& string)
{
return string.isNull() ? 0 : DefaultHash<String>::Hash::hash(string);
}
CustomFilterProgramInfo::CustomFilterProgramInfo()
{
}
bool CustomFilterProgramInfo::isEmptyValue() const
{
return m_vertexShaderString.isNull()
&& m_fragmentShaderString.isNull();
}
CustomFilterProgramInfo::CustomFilterProgramInfo(WTF::HashTableDeletedValueType)
: m_vertexShaderString(WTF::HashTableDeletedValue)
, m_fragmentShaderString(WTF::HashTableDeletedValue)
{
}
bool CustomFilterProgramInfo::isHashTableDeletedValue() const
{
return m_vertexShaderString.isHashTableDeletedValue()
&& m_fragmentShaderString.isHashTableDeletedValue();
}
CustomFilterProgramInfo::CustomFilterProgramInfo(const String& vertexShader, const String& fragmentShader, CustomFilterProgramType programType, const CustomFilterProgramMixSettings& mixSettings)
: m_vertexShaderString(vertexShader)
, m_fragmentShaderString(fragmentShader)
, m_programType(programType)
, m_mixSettings(mixSettings)
{
// At least one of the shaders needs to be non-null.
ASSERT(!m_vertexShaderString.isNull() || !m_fragmentShaderString.isNull());
}
unsigned CustomFilterProgramInfo::hash() const
{
// At least one of the shaders needs to be non-null.
ASSERT(!m_vertexShaderString.isNull() || !m_fragmentShaderString.isNull());
uintptr_t hashCodes[5] = {
hashPossiblyNullString(m_vertexShaderString),
hashPossiblyNullString(m_fragmentShaderString),
m_programType == PROGRAM_TYPE_BLENDS_ELEMENT_TEXTURE,
m_programType == PROGRAM_TYPE_BLENDS_ELEMENT_TEXTURE ? m_mixSettings.blendMode : 0,
m_programType == PROGRAM_TYPE_BLENDS_ELEMENT_TEXTURE ? m_mixSettings.compositeOperator : 0
};
return StringHasher::hashMemory<sizeof(hashCodes)>(&hashCodes);
}
bool CustomFilterProgramInfo::operator==(const CustomFilterProgramInfo& o) const
{
ASSERT(!isHashTableDeletedValue());
ASSERT(!o.isHashTableDeletedValue());
if (m_programType == PROGRAM_TYPE_BLENDS_ELEMENT_TEXTURE)
return m_vertexShaderString == o.m_vertexShaderString
&& m_fragmentShaderString == o.m_fragmentShaderString
&& m_programType == o.m_programType
&& m_mixSettings == o.m_mixSettings;
return m_vertexShaderString == o.m_vertexShaderString
&& m_fragmentShaderString == o.m_fragmentShaderString
&& m_programType == o.m_programType;
}
} // namespace WebCore
#endif // ENABLE(CSS_SHADERS)
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