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21acbed65b
This commit adds support for SIMD-based alpha blending, which speeds up the alpha-compositing of the nitpicker GUI server by circa 300% on ARM Neon and x86_64 using SSE4.1 Issue #5428
72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
/*
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* \brief Blit API
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* \author Norman Feske
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* \date 2025-01-16
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*/
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/*
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* Copyright (C) 2025 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__BLIT_H_
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#define _INCLUDE__BLIT_H_
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#include <blit/types.h>
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#include <blit/internal/slow.h>
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namespace Blit {
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/**
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* Back-to-front copy
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*
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* Copy a rectangular part of a texture to a surface while optionally
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* applying rotation and flipping. The width and height of the texture
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* must be divisible by 8. Surface and texture must perfectly line up.
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* E.g., when rotating by 90 degrees, the texture width must equal the
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* surface height and vice versa. The clipping area of the surface is
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* ignored.
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*
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* The combination of rotate and flip arguments works as follows:
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*
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* normal flipped
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*
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* rotated 0 0 1 2 3 3 2 1 0
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* 4 5 6 7 7 6 5 4
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* 8 9 10 11 11 10 9 8
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*
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* rotated 90 8 4 0 0 4 8
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* 9 5 1 1 5 9
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* 10 6 2 2 6 10
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* 11 7 3 3 7 11
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*
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* rotated 180 11 10 9 8 8 9 10 11
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* 7 6 5 4 4 5 6 7
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* 3 2 1 0 0 1 2 3
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*
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* rotated 270 3 7 11 11 7 3
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* 2 6 10 10 6 2
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* 1 5 9 9 5 1
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* 0 4 8 8 4 0
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*/
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static inline void back2front(Surface<Pixel_rgb888> &surface,
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Texture<Pixel_rgb888> const &texture,
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Rect rect, Rotate rotate, Flip flip)
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{
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_b2f<Slow>(surface, texture, rect, rotate, flip);
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}
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/**
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* Blend a sequence of pixels to 'dst' according to discrete alpha values
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*/
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static inline void blend_xrgb_a(uint32_t *dst, unsigned n,
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uint32_t const *pixel, uint8_t const *alpha)
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{
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Slow::Blend::xrgb_a(dst, n, pixel, alpha);
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}
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}
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#endif /* _INCLUDE__BLIT_H_ */
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