/* * Copyright © 2016 Keith Packard * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. */ #include "ao.h" #include "ao_draw.h" #include "ao_draw_int.h" static inline uint32_t ao_pattern_expand(uint8_t v, uint8_t rot) { uint32_t r; if (rot) v = ao_left(v, 8-rot) | ao_right(v, rot); r = v; return (r << 24) | (r << 16) | (r << 8) | (r); } static inline int min(int a, int b) { return a < b ? a : b; } void ao_pattern(const struct ao_bitmap *dst, int16_t x, int16_t y, int16_t width, int16_t height, const struct ao_pattern *pattern, int16_t pat_x, int16_t pat_y, uint8_t rop) { uint32_t pat[8]; int16_t x2 = x + width; int16_t y2 = y + height; ao_clip(x, 0, dst->width); ao_clip(x2, 0, dst->width); ao_clip(y, 0, dst->height); ao_clip(y2, 0, dst->height); if (x < x2 && y < y2) { int xrot = (x - pat_x) & 7; int yrot = (y - pat_y) & 7; int i; int16_t dst_x, dst_y; for (i = 0; i < 8; i++) pat[(i + yrot) & 7] = ao_pattern_expand(pattern->pattern[i], xrot); for (dst_y = y; dst_y < y2; dst_y += 8) { int h = min(y2 - dst_y, 8); for (dst_x = x; dst_x < x2; dst_x += 8) { int w = min(x2 - dst_x, 8); ao_blt(pat, 1, 0, dst->base + dst_y * dst->stride, dst->stride, dst_x, w, h, rop, 0, 0); } } } }