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From Vladimir Shabanov, "osg::Image::isImageTranslucent() now handles

Browse Source 
GL_UNSIGNED_SHORT_5_5_5_1, GL_UNSIGNED_SHORT_1_5_5_5_REV,
GL_UNSIGNED_SHORT_4_4_4_4, GL_UNSIGNED_SHORT_4_4_4_4_REV,
GL_UNSIGNED_INT_10_10_10_2, GL_UNSIGNED_INT_2_10_10_10_REV and
GL_HALF_FLOAT_NV pixel formats."
This commit is contained in:
Robert Osfield
2007-06-10 19:22:13 +00:00
parent 3d918ef35f
commit 43790b07b3
1 changed files with 52 additions and 0 deletions
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52
src/osg/Image.cpp
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@@ -963,6 +963,17 @@ bool _findLowerAlphaValueInRow(unsigned int num, T* data,T value, unsigned int d
return false;
}
template <typename T>
bool _maskedFindLowerAlphaValueInRow(unsigned int num, T* data,T value, T mask, unsigned int delta)
{
for(unsigned int i=0;i<num;++i)
{
if ((*data & mask)<value) return true;
data += delta;
}
return false;
}
bool Image::isImageTranslucent() const
{
unsigned int offset = 0;
@@ -1024,6 +1035,47 @@ bool Image::isImageTranslucent() const
if (_findLowerAlphaValueInRow(s(), (float*)d + offset, 1.0f, delta))
return true;
break;
case(GL_UNSIGNED_SHORT_5_5_5_1):
if (_maskedFindLowerAlphaValueInRow(s(), (unsigned short*)d,
(unsigned short)0x0001,
(unsigned short)0x0001, 1))
return true;
break;
case(GL_UNSIGNED_SHORT_1_5_5_5_REV):
if (_maskedFindLowerAlphaValueInRow(s(), (unsigned short*)d,
(unsigned short)0x8000,
(unsigned short)0x8000, 1))
return true;
break;
case(GL_UNSIGNED_SHORT_4_4_4_4):
if (_maskedFindLowerAlphaValueInRow(s(), (unsigned short*)d,
(unsigned short)0x000f,
(unsigned short)0x000f, 1))
return true;
break;
case(GL_UNSIGNED_SHORT_4_4_4_4_REV):
if (_maskedFindLowerAlphaValueInRow(s(), (unsigned short*)d,
(unsigned short)0xf000,
(unsigned short)0xf000, 1))
return true;
break;
case(GL_UNSIGNED_INT_10_10_10_2):
if (_maskedFindLowerAlphaValueInRow(s(), (unsigned int*)d,
0x00000003u,
0x00000003u, 1))
return true;
break;
case(GL_UNSIGNED_INT_2_10_10_10_REV):
if (_maskedFindLowerAlphaValueInRow(s(), (unsigned int*)d,
0xc0000000u,
0xc0000000u, 1))
return true;
break;
case(GL_HALF_FLOAT_NV):
if (_findLowerAlphaValueInRow(s(), (unsigned short*)d + offset,
(unsigned short)0x3c00, delta))
return true;
break;
}
}
}