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From Farshid Lashkari, BGR write support for BMP, PNG and TGA

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This commit is contained in:
Robert Osfield
2011-06-20 12:36:53 +00:00
parent 0392efafea
commit 9781fe55ea
3 changed files with 29 additions and 9 deletions
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19
src/osgPlugins/tga/ReaderWriterTGA.cpp
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@@ -549,8 +549,9 @@ class ReaderWriterTGA : public osgDB::ReaderWriter
// Other data types can be added soon with different options
// The format description can be found at:
// http://local.wasp.uwa.edu.au/~pbourke/dataformats/tga/
unsigned int pixelFormat = image.getPixelFormat();
int width = image.s(), height = image.t();
int numPerPixel = image.computeNumComponents(image.getPixelFormat());
int numPerPixel = image.computeNumComponents(pixelFormat);
int pixelMultiplier = (image.getDataType()==GL_FLOAT ? 255 : 1);
const unsigned char* data = image.data();
if ( !data ) return false;
@@ -569,6 +570,14 @@ class ReaderWriterTGA : public osgDB::ReaderWriter
fout.put(numPerPixel * 8); // Image pixel size
fout.put(0); // Image descriptor
// Swap red/blue channels for BGR images
int r = 0, g = 1, b = 2;
if( pixelFormat == GL_BGR || pixelFormat == GL_BGRA )
{
r = 2;
b = 0;
}
// Data
for (int y=0; y<height; ++y)
{
@@ -579,12 +588,12 @@ class ReaderWriterTGA : public osgDB::ReaderWriter
switch ( numPerPixel )
{
case 3: // BGR
fout.put(ptr[off+2] * pixelMultiplier); fout.put(ptr[off+1] * pixelMultiplier);
fout.put(ptr[off+0] * pixelMultiplier);
fout.put(ptr[off+b] * pixelMultiplier); fout.put(ptr[off+g] * pixelMultiplier);
fout.put(ptr[off+r] * pixelMultiplier);
break;
case 4: // BGRA
fout.put(ptr[off+2] * pixelMultiplier); fout.put(ptr[off+1] * pixelMultiplier);
fout.put(ptr[off+0] * pixelMultiplier); fout.put(ptr[off+3] * pixelMultiplier);
fout.put(ptr[off+b] * pixelMultiplier); fout.put(ptr[off+g] * pixelMultiplier);
fout.put(ptr[off+r] * pixelMultiplier); fout.put(ptr[off+3] * pixelMultiplier);
break;
default:
return false;