According to the svg specs clip's fill and opacity
should be ignored. Till now setting the alpha/opacity
value to zero resulted in the shape's rendering abort.
@Issue: https://github.com/Samsung/thorvg/issues/1192
the old version of Accessor::access() is redundant,
we replaced it with set().
It's still under the beta, we can remove it immediately.
Note that we've planned to promote them official APIs in v0.9.
Newly changed, tagging beta again...w
It supports data parameters that
can pass user data to the callback function.
std::unique_ptr<Picture> access(std::unique_ptr<Picture> picture, bool(*func)(const Paint* paint, void* data), void* data) noexcept;
Introduced CompositeMethod::LumaMask that converts the source pixels to the
grayscale (luma value) before alpha blending. Thanks to it, mask works more like
typical mask in graphics editor software.
Grayscale is calculated with weighted method:
(0.0721*B + 0.7154*G + 0.2125*R) * A
Introduced surface->blender.lumaValue function
Basically, this Accessor is a utility to debug the Scene structure,
by traversing the scene-tree by users.
You can search specific nodes to read the property information,
figure out the structure of the scene tree and its size.
We actually don't recommend you to touch the property unless you really
know the each paint's position and role because it's not visible, difficult to
understand its anatomy.
Also, You must underatnd that modifying the nodes of the scene will be going
well with both the art-design structure and the prorgram logic.
In this first version, Accessor only supports for the Picture class.
@example:
auto picture = tvg::Picture::gen();
picture->load("test.svg");
//The callback function from lambda expression.
//This function will be called for every paint nodes of the tree.
auto f = [](const tvg::Paint* paint) -> bool
{
if (paint->identifier() == Shape::identifier()) {
//override properties?
uint8_t r, g, b, a;
paint->fillColor(&r, &g, &b, &a);
paint->fill(r / 2, g / 2, b / 2, a);
}
//You can return false, to stop traversing immediately.
return true;
};
auto accessor = tvg::Accessor::gen();
picture = accessor->access(move(picture), f);
...
@Issue: https://github.com/Samsung/thorvg/issues/693
Migrate the id property to the base class internals
so that pimpl classes could access the data easier.
This is a sort of prerequisite change for the coming texmap anti-aliasing.
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
This patch introduces _STRAIGHT colorspaces (ABGR8888_STRAIGHT and
ARGB8888_STRAIGHT) whose colors are un-alpha-premultiplied. Unmultiplicated
colors are especially needed for wasm thorvg loader and svg2png / tvg2png.
Only C version now.
@issue: #791
We missed the final keyword for the Saver,
This inheritance is out of our policy.
It might be break apis but Saver class is just opened,
and we're pretty sure that there is no any extension of this.
I know this is the bad decision, but we have a chance yet,
so we must correct it before further late.
This identifier is useful when user identify the instance type in runtime.
ThorVG basically don't prefer to dynamic_cast() nor typeid(),
it compiles with -fno-rtti option for the optimial size.
Here is an example for the simple usage.
if (paint->identifier() == Shape::identifier())
auto shape = static_cast<Shape*>(paint);
@Issue: https://github.com/Samsung/thorvg/issues/693
Current paint::bounds() returns the coordinates under the raw status,
the values are not quite useful if the paint object has the transformed children.
Thus, we extends the feature and give an additional parameter "transformed"
to return the coordinates values after transformation by user demands.
This is also necessary for tvg format, since we need the exact view size of the scene information.
The previous api is deprecated and we introduce a new api to replace it.
@APIs:
+ Result Paint::bounds(float* x, float* y, float* w, float* h, bool transformed) const noexcept;
- Result Paint::bounds(float* x, float* y, float* w, float* h) const noexcept;
@Issues: https://github.com/Samsung/thorvg/issues/746
tvg picture is going to be released, we need the Saver as well.
Also, two stable periperal apis are released in v0.5
@APIs:
Result Picture::load(const char* data, uint32_t size, const std::string& mimeType, bool copy = false) noexcept;
CompositeMethod Paint::composite(const Paint** target) const noexcept;
Result Saver::save(std::unique_ptr<Paint> paint, const std::string& path, bool compress = true) noexcept;
Result Saver::sync() noexcept;
static std::unique_ptr<Saver> Saver::gen() noexcept;
* common: move iterator functionality into separate IteratorModule
* wasm: allow internal lib dependencies and iterator
* wasm: added functions for layers revising
This patch adds functions to thorvgwasm.cpp:
layers() - that return a list of paints in a picture
bounds() - that returns a bounds of a given paint
setOpacity() - that sets the opacity of a given paint
By choosing compress option, tvg tries to compress the data to reduce the binary size.
Since the compression has the double-edges sword, we provides an option to users
to select it by their demand. Basically, compression is better than non-compression.
After profiling, we decided to use the encoder/decoder of Guilherme R. Lampert's.
Here is the profiling result:
test.tvg: 296037 -> 243411 (-17%)
tiger.tvg: 54568 -> 50622 (-7%)
image-embedded.tvg: 2282 -> 1231 (-46%)
@Issue: https://github.com/Samsung/thorvg/issues/639
About compression method:
Lempel–Ziv–Welch (LZW) encoder/decoder by Guilherme R. Lampert
This is the compression scheme used by the GIF image format and the Unix 'compress' tool.
Main differences from this implementation is that End Of Input (EOI) and Clear Codes (CC)
are not stored in the output and the max code length in bits is 12, vs 16 in compress.
EOI is simply detected by the end of the data stream, while CC happens if the
dictionary gets filled. Data is written/read from bit streams, which handle
byte-alignment for us in a transparent way.
The decoder relies on the hardcoded data layout produced by the encoder, since
no additional reconstruction data is added to the output, so they must match.
The nice thing about LZW is that we can reconstruct the dictionary directly from
the stream of codes generated by the encoder, so this avoids storing additional
headers in the bit stream.
The output code length is variable. It starts with the minimum number of bits
required to store the base byte-sized dictionary and automatically increases
as the dictionary gets larger (it starts at 9-bits and grows to 10-bits when
code 512 is added, then 11-bits when 1024 is added, and so on). If the dictionary
is filled (4096 items for a 12-bits dictionary), the whole thing is cleared and
the process starts over. This is the main reason why the encoder and the decoder
must match perfectly, since the lengths of the codes will not be specified with
the data itself.
Pixel-based image picture doesn't work at size() method.
Obvisouly, we missed to implement it properly.
This patch corrects it.
@Issue: https://github.com/Samsung/thorvg/issues/656
