Since the color space is set at the time of specifying the target buffer of the canvas,
there is no way to know the color space when the picture is loaded.
So, check the color space applied to SwCanvas at the time of reload()
and change the color space.
There is an issue of BGR color space support for each loader.
The external_jpg loader resets the TJPF color space and calls read() to get a new buffer.
In the case of external_png, we need to change the color value directly
because it have to start over from begin_read_*.
This solution can affect performance as much as it access again image buffer
that have already been `read()` done. However, this only happens once.
Previously, translucent png images are not displayed properly
due to alpha channels premultiplication.
This patch implements that missing part to support it properly
by introducing the Surface data between canvas engine & rasterizer
@Issue: https://github.com/Samsung/thorvg/issues/655
This reverts commit cd5116b053.
Ah this breaks the Stress example due to Picture::duplicate() is not available...
Need to consider and come back again.
* common: added colorSpace() function
This patch introduces colorSpace() function for SW and GL engine.
* infra: change LoadModule:read() into LoadModule:read(uint32_t colorspace)
This patch changes LoadModule:read() into LoadModule:read(uint32_t colorspace)
* picture: implement passing colorspace into loader
This patch implements passing colorspace into loaders.
Loader->read is now called on the first update.
* external_jpg_loader: support colorspaces
* external_png_loader: support colorspaces
Adds an alternative static jpg loader.
The jpg loader copied the jpeg decoding implementation from this open-source
repo: https://github.com/richgel999/jpeg-compressor
That opensource has the public-domain license, it doesn't have any restriction
of the copy.
note: jpgd.cpp is modified version (changed decompress_jpeg_image_from_stream)
for returning BGRA
This patch has 2 purposes,
1. revise the loaders infrastructure to support both static/external linking loaders.
2. add a template for static jpg/png loaders after external jpg/png.
Our default loaders prefer static linking, external loaders are only available
when dependent libraries on the build system are found.
You might wonder why we have the external loaders together,
they might be faster than static loaders since the popular libraries are likely to be well maintained,
fine-grained optimized.
Thus in this patch, meson tries to apply the external loaders first
then see if the dependencies were found or not,
if it's failed, it turns to the default static loaders.
Next this patch, we need the contribution for actual static jpg/png loaders implementation.
@Issue: https://github.com/Samsung/thorvg/issues/594
Added error string printing on jpg image loading failure.
The error message help developer find the corrupted jpg file.
Error message is not printed for open from char* data as there the
loaders are tried on by one.
Bitmap based pictures doesn't need the viewbox,
LoaderModule should delegate the viewbox to the derived classes which
having vector-based image loaders such as svg, tvg.
In that case, paint resizing can be performed by the loaders by own
policy.
If the copied data in JpgLoader's data open is invalid,
it is processed without being cleared.
Therefore, data memory free is handled in the destructor.
This patch introduces a jpg loader.
For decoding the image, libjpeg-turbo library is used. Library was found to be
fast (SIMD instructions accelerated) and portable.
@issue: #517
