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LibAccelGfx+LibWeb: Add basic support for linear gradients painting

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Linear gradient painting is implemented in the following way:
1. The rectangle is divided into segments where each segment represents
   a simple linear gradient between an adjacent pair of stops.
2. Each quad is filled separately using a fragment shader that
   interpolates between two colors.

For now `angle` and `repeat_length` parameters are ignored.
This commit is contained in:
Aliaksandr Kalenik 2023-11-15 20:39:15 +01:00 • committed by Andreas Kling
parent 61a2e59d87
commit f6a9f613c7
3 changed files with 119 additions and 2 deletions
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4
Userland/Libraries/LibWeb/Painting/PaintingCommandExecutorGPU.cpp
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@ -99,9 +99,9 @@ CommandResult PaintingCommandExecutorGPU::pop_stacking_context_with_mask(Gfx::In
return CommandResult::Continue;
}
CommandResult PaintingCommandExecutorGPU::paint_linear_gradient(Gfx::IntRect const&, Web::Painting::LinearGradientData const&)
CommandResult PaintingCommandExecutorGPU::paint_linear_gradient(Gfx::IntRect const& rect, Web::Painting::LinearGradientData const& data)
{
// FIXME
painter().fill_rect_with_linear_gradient(rect, data.color_stops.list, data.gradient_angle, data.color_stops.repeat_length);
return CommandResult::Continue;
}