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optimize case where image_view is used but is not a subset - refs #2024

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This commit is contained in:
Dane Springmeyer 2013-09-27 12:17:31 -07:00
parent 44807673a3
commit 90dd6b9d61
1 changed files with 38 additions and 16 deletions
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32
include/mapnik/webp_io.hpp
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@ -73,9 +73,30 @@ inline int import_image_data(T2 const& image,
WebPPicture & pic,
bool alpha)
{
// Reason for copy: https://github.com/mapnik/mapnik/issues/2024
ImageData<typename T2::pixel_type> const& data = image.data();
int stride = sizeof(typename T2::pixel_type) * image.width();
if (data.width() == image.width() &&
data.height() == image.height())
{
std::clog << "opt\n";
if (alpha)
{
return WebPPictureImportRGBA(&pic, data.getBytes(), stride);
}
else
{
#if (WEBP_ENCODER_ABI_VERSION >> 8) >= 1
return WebPPictureImportRGBX(&pic, data.getBytes(), stride);
#else
return WebPPictureImportRGBA(&pic, data.getBytes(), stride);
#endif
}
}
else
{
// need to copy: https://github.com/mapnik/mapnik/issues/2024
std::clog << "copy\n";
image_data_32 im(image.width(),image.height());
int stride = sizeof(typename T2::pixel_type) * im.width();
for (unsigned y = 0; y < image.height(); ++y)
{
typename T2::pixel_type const * row_from = image.getRow(y);
@ -88,11 +109,12 @@ inline int import_image_data(T2 const& image,
}
else
{
#if (WEBP_ENCODER_ABI_VERSION >> 8) >= 1
#if (WEBP_ENCODER_ABI_VERSION >> 8) >= 1
return WebPPictureImportRGBX(&pic, im.getBytes(), stride);
#else
#else
return WebPPictureImportRGBA(&pic, im.getBytes(), stride);
#endif
#endif
}
}
}