1. convert mat4 directly from exist mat3, and remove unused calculation
code.
2. since normalized position is only meaningful in vertex shader stage.
use logical position in fragment shader stage for all gradient
pipeline.
Upgrade the used glsl version in GL shader source.
New version can directly specify the attribute location in
shader and the uniform block is only available in new glsl version
VAO is new object in modern GL API, which can split and manage vertex
buffer and attribute state. This is optional in GLES and is mandatory in
GL.
Also index buffer is faster then pass cpu data in GL draw call.
The 3x3 matrix already contains the geometric transformation
information required for 2D rendering.
We can directly convert from the 3x3 matrix to
the 4x4 matrix to facilitate subsequent GPU rendering.
The blending feature allows user to combine colors to create visually appealing effects,
including transparency, lighting, shading, and color mixing, among others.
Its process involves the combination of colors or images from the source paint object
with the destination (the lower layer image) using blending operations.
The blending operation is determined by the chosen @p BlendMethod,
which specifies how the colors or images are combined.
@APIs:
- enum class BlendMethod::Normal, Add, Screen, Multiply, Overlay, Lighten, Difference, Exclusion, SrcOver, Darken, Lighten, ColorDodge, ColorBurn
- BlendMethod Paint::blend() const noexcept;
- Result Paint::blend(BlendMethod method) const noexcept;
@Issue: https://github.com/thorvg/thorvg/issues/307
Co-authored-by: Peter Vullings <peter@projectitis.com>
Co-authored-by: Hermet Park <hermetpark@lottiefiles.com>
Introduced SceneTask, it implements scene clippath behavior
by merging RLE of the scene children render data on any running thread.
Co-authored-by: Michal Szczecinski <m.szczecinsk@partner.samsung.com>
@Issue: https://github.com/thorvg/thorvg/issues/524
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.
../src/lib/gl_engine/tvgGlRenderer.cpp: In member function ‘virtual bool GlRenderer::renderShape(tvg::RenderData)’:
../src/lib/gl_engine/tvgGlRenderer.cpp:171:30: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized]
171 | drawPrimitive(*sdata, r, g, b, a, i, RenderUpdateFlag::Stroke);
| ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/lib/gl_engine/tvgGlRenderer.cpp:171:30: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized]
../src/lib/gl_engine/tvgGlRenderer.cpp:171:30: warning: ‘g’ may be used uninitialized in this function [-Wmaybe-uninitialized]
../src/lib/gl_engine/tvgGlRenderer.cpp:171:30: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized]
../src/lib/gl_engine/tvgGlRenderer.cpp: In member function ‘virtual void* GlRenderer::prepare(const tvg::RenderShape&, tvg::RenderData, const tvg::RenderTransform*, uint32_t, tvg::Array<void*>&, tvg::RenderUpdateFlag, bool)’:
../src/lib/gl_engine/tvgGlRenderer.cpp:215:21: warning: ‘alphaS’ may be used uninitialized in this function [-Wmaybe-uninitialized]
215 | uint8_t alphaF, alphaS;
re-design the shape data structure so that render backends
are able to access them directly.
This also let us remove tvgShape member data from the Shape::Impl.
To achieve this, migrate shape/stroke/path
from the canvas interface to the render interface.
If a paint is used as a clipper, it must be determined in the paint behavior.
Propagate its decision to the immediate derived classes so that
not only shapes but also scenes must be dealt as a clipper properly.
This revised this change 0de3872be3
for better a solution.
The implementation of the virtual prepare() method is different from that of RenderMethod.
from that of RenderMethod, so the compilation fails. This modification solves the problem.
Change id() to identifier().
error log
```
../src/lib/gl_engine/tvgGlRenderer.cpp:333:19: error: ‘const class tvg::Fill’ has no member named ‘id’
333 | switch (fill->id()) {
```
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
There was a missing sorting between the left-top & right-bottom corner.
that results in the negative values of the viewport...
Now fixed it.
+ refactored to use math functions...
+ still it's a buggy, sometimes no draw at 90' in stress. don't know reason. :(
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
removed invalid nullptr checks.
New allocation doesn't gurantee that returns nullptr when it's failed.
It's useless on the modern compliers and our policy respects it.
We can replace the system logger method by changing single line print source in common,
This also helps to remove the THORVG_LOG_ENABLED macro from each use-cases.
TVGLOG(): To print the hint & tip messages for users.
TVGERR(): To print the error message for debugging.
@Issues: https://github.com/Samsung/thorvg/issues/36
If ClipPath is a singular rectangle,
we don't need to apply this to all children nodes to adjust rle span regions.
Rather than its regular sequence,
we can adjust render region as merging viewport that is introduced internally,
All in all,
If a Paint has a single ClipPath that is Rectangle,
it sets viewport with Rectangle area that viewport is applied to
raster engine to cut off the rendering boundary.
In the normal case it brings trivial effects.
but when use SVGs which has a viewbox, it could increase the performance
up to 10% (profiled with 200 svgs rendering at the same time)
Note that, this won't be applied if the Paint has affine or rotation transform.
@Issues: 294
Introduced the reference counting for the backend engines so that
tvg prevents unpaired engine initialization/termination calls by user mistake.
@Issues: 296
