This patch introduces tvg loader module for loading .tvg binary files.
This allows to load and reuse pregenerated scene.
tvg file format:
.tvg is a binary file format designed for saving/restoring the scene content.
It allows to save scenes and reuse them in other apps or to restore state of
the application.
@Example:
auto picture = tvg::Picture::gen();
picture->load(EXAMPLE_DIR"/tvg_file.tvg");
canvas->push(move(picture));
@API Additions:
Result paint(std::unique_ptr<Paint> paint) noexcept;
@Issue: Issue ticket is #375.
The loader was ready to handle the gradient stroke, but there was no API to support
it when the loader was introduced. We've had this API for a while already, so
its call has been added.
When canvas width was smaller than its stride and a composition is used,
the plots were drawn incorrectly. This is fixed by setting the image width
(image from a compositor) to be equal to the surface stride, instead of its width.
The image data are now allocated accordingly the fixed image width.
We are doing enough calculations in the parser if the unit is user space.
This causes the cx,cy coordinates of radial gradient to be calculated incorrectly.
So remove it.
Calculation of objectBoundingBox case in linear gradient is incorrect code.
This causes the x,y coordinates of the linear gradient to be calculated incorrectly.
So remove it.
This patch introduces tvgTvgHelper.h file that contains base definitions used
for .tvg loader and saver modules. Indicators, flags and sizes are defined
and base tvgBlock struct is declared here.
'tvgTvgHelper.h' file is essential only for .tvg loader/saver module and it
doesn't affect any other file. Loader and saver modules itself are introduced
in other, further patches.
.tvg is a binary file format designed for saving/restoring the scene content.
It allows to save scenes and reuse them in other apps or to restore state of
the application.
The 'loader->svgParse->global' variable was uninitialized when no viewBox attribute
was set. If gradient was applied, the division by zero occured and no gradient was drawn.
Catch2 is a multi-paradigm test framework for C++.
It is primarily distributed as a single header file,
very easy and simple to adopt this to thorvg project.
This patch introduces catch2 infrastsructure and one prototype as a sample.
You can refer "testInitializer.cpp", how to add unit test!
while ignoring else files such as "catch2.hpp", "testMain.cpp"
Also, enable Unit-tests with meson option when you change any thorvg code.
$meson build -Dtests=true.
launch tvgUnitTest in the build result then verify 100% coverage
before submitting any patches.
When memory is not allocated successully, it must return the FailedAllocation as the return value.
Previous initializer wrongly returns the value that case, this corrects it.
changed alpha channel data type to 32 bits from 8 bits,
since subsequent data operations requires 32 bits values.
this 8 bits (since channel range is up to 255) doesn't helpful
for saving memory size because it would generate additional data casting by compiler.
I compared the binary size and this patch saves about 600bytes.
Calculations accuracy in ALPHA_BLEND function has been
improved. Until now blending resulted in a slight hue change
(all color channels affected). The chosen method of calculation
is a compromise between the accuracy and the performance.
compoiste() requires internal data change, its api syntax should not contain "const"
though this changes the api spec, but won't affect build break
since it allows wider usage.
@API Modification
from:
Result Paint::composite(std::unique_ptr<Paint> target, CompositeMethod method) const noexcept
to:
Result Paint::composite(std::unique_ptr<Paint> target, CompositeMethod method) noexcept
