diff options
author | sanine <sanine.not@pm.me> | 2023-02-12 23:53:22 -0600 |
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committer | sanine <sanine.not@pm.me> | 2023-02-12 23:53:22 -0600 |
commit | f1fe73d1909a2448a004a88362a1a532d0d4f7c3 (patch) | |
tree | ab37ae3837e2f858de2932bcee9f26e69fab3db1 /libs/pixman-0.40.0/pixman/pixman-edge.c | |
parent | f567ea1e2798fd3156a416e61f083ea3e6b95719 (diff) |
switch to tinyobj and nanovg from assimp and cairo
Diffstat (limited to 'libs/pixman-0.40.0/pixman/pixman-edge.c')
-rw-r--r-- | libs/pixman-0.40.0/pixman/pixman-edge.c | 385 |
1 files changed, 0 insertions, 385 deletions
diff --git a/libs/pixman-0.40.0/pixman/pixman-edge.c b/libs/pixman-0.40.0/pixman/pixman-edge.c deleted file mode 100644 index ad6dfc4..0000000 --- a/libs/pixman-0.40.0/pixman/pixman-edge.c +++ /dev/null @@ -1,385 +0,0 @@ -/* - * Copyright © 2004 Keith Packard - * - * Permission to use, copy, modify, distribute, and sell this software and its - * documentation for any purpose is hereby granted without fee, provided that - * the above copyright notice appear in all copies and that both that - * copyright notice and this permission notice appear in supporting - * documentation, and that the name of Keith Packard not be used in - * advertising or publicity pertaining to distribution of the software without - * specific, written prior permission. Keith Packard makes no - * representations about the suitability of this software for any purpose. It - * is provided "as is" without express or implied warranty. - * - * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, - * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO - * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR - * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, - * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER - * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR - * PERFORMANCE OF THIS SOFTWARE. - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include <string.h> - -#include "pixman-private.h" -#include "pixman-accessor.h" - -/* - * Step across a small sample grid gap - */ -#define RENDER_EDGE_STEP_SMALL(edge) \ - { \ - edge->x += edge->stepx_small; \ - edge->e += edge->dx_small; \ - if (edge->e > 0) \ - { \ - edge->e -= edge->dy; \ - edge->x += edge->signdx; \ - } \ - } - -/* - * Step across a large sample grid gap - */ -#define RENDER_EDGE_STEP_BIG(edge) \ - { \ - edge->x += edge->stepx_big; \ - edge->e += edge->dx_big; \ - if (edge->e > 0) \ - { \ - edge->e -= edge->dy; \ - edge->x += edge->signdx; \ - } \ - } - -#ifdef PIXMAN_FB_ACCESSORS -#define PIXMAN_RASTERIZE_EDGES pixman_rasterize_edges_accessors -#else -#define PIXMAN_RASTERIZE_EDGES pixman_rasterize_edges_no_accessors -#endif - -/* - * 4 bit alpha - */ - -#define N_BITS 4 -#define RASTERIZE_EDGES rasterize_edges_4 - -#ifndef WORDS_BIGENDIAN -#define SHIFT_4(o) ((o) << 2) -#else -#define SHIFT_4(o) ((1 - (o)) << 2) -#endif - -#define GET_4(x, o) (((x) >> SHIFT_4 (o)) & 0xf) -#define PUT_4(x, o, v) \ - (((x) & ~(0xf << SHIFT_4 (o))) | (((v) & 0xf) << SHIFT_4 (o))) - -#define DEFINE_ALPHA(line, x) \ - uint8_t *__ap = (uint8_t *) line + ((x) >> 1); \ - int __ao = (x) & 1 - -#define STEP_ALPHA ((__ap += __ao), (__ao ^= 1)) - -#define ADD_ALPHA(a) \ - { \ - uint8_t __o = READ (image, __ap); \ - uint8_t __a = (a) + GET_4 (__o, __ao); \ - WRITE (image, __ap, PUT_4 (__o, __ao, __a | (0 - ((__a) >> 4)))); \ - } - -#include "pixman-edge-imp.h" - -#undef ADD_ALPHA -#undef STEP_ALPHA -#undef DEFINE_ALPHA -#undef RASTERIZE_EDGES -#undef N_BITS - - -/* - * 1 bit alpha - */ - -#define N_BITS 1 -#define RASTERIZE_EDGES rasterize_edges_1 - -#include "pixman-edge-imp.h" - -#undef RASTERIZE_EDGES -#undef N_BITS - -/* - * 8 bit alpha - */ - -static force_inline uint8_t -clip255 (int x) -{ - if (x > 255) - return 255; - - return x; -} - -#define ADD_SATURATE_8(buf, val, length) \ - do \ - { \ - int i__ = (length); \ - uint8_t *buf__ = (buf); \ - int val__ = (val); \ - \ - while (i__--) \ - { \ - WRITE (image, (buf__), clip255 (READ (image, (buf__)) + (val__))); \ - (buf__)++; \ - } \ - } while (0) - -/* - * We want to detect the case where we add the same value to a long - * span of pixels. The triangles on the end are filled in while we - * count how many sub-pixel scanlines contribute to the middle section. - * - * +--------------------------+ - * fill_height =| \ / - * +------------------+ - * |================| - * fill_start fill_end - */ -static void -rasterize_edges_8 (pixman_image_t *image, - pixman_edge_t * l, - pixman_edge_t * r, - pixman_fixed_t t, - pixman_fixed_t b) -{ - pixman_fixed_t y = t; - uint32_t *line; - int fill_start = -1, fill_end = -1; - int fill_size = 0; - uint32_t *buf = (image)->bits.bits; - int stride = (image)->bits.rowstride; - int width = (image)->bits.width; - - line = buf + pixman_fixed_to_int (y) * stride; - - for (;;) - { - uint8_t *ap = (uint8_t *) line; - pixman_fixed_t lx, rx; - int lxi, rxi; - - /* clip X */ - lx = l->x; - if (lx < 0) - lx = 0; - - rx = r->x; - - if (pixman_fixed_to_int (rx) >= width) - { - /* Use the last pixel of the scanline, covered 100%. - * We can't use the first pixel following the scanline, - * because accessing it could result in a buffer overrun. - */ - rx = pixman_int_to_fixed (width) - 1; - } - - /* Skip empty (or backwards) sections */ - if (rx > lx) - { - int lxs, rxs; - - /* Find pixel bounds for span. */ - lxi = pixman_fixed_to_int (lx); - rxi = pixman_fixed_to_int (rx); - - /* Sample coverage for edge pixels */ - lxs = RENDER_SAMPLES_X (lx, 8); - rxs = RENDER_SAMPLES_X (rx, 8); - - /* Add coverage across row */ - if (lxi == rxi) - { - WRITE (image, ap + lxi, - clip255 (READ (image, ap + lxi) + rxs - lxs)); - } - else - { - WRITE (image, ap + lxi, - clip255 (READ (image, ap + lxi) + N_X_FRAC (8) - lxs)); - - /* Move forward so that lxi/rxi is the pixel span */ - lxi++; - - /* Don't bother trying to optimize the fill unless - * the span is longer than 4 pixels. */ - if (rxi - lxi > 4) - { - if (fill_start < 0) - { - fill_start = lxi; - fill_end = rxi; - fill_size++; - } - else - { - if (lxi >= fill_end || rxi < fill_start) - { - /* We're beyond what we saved, just fill it */ - ADD_SATURATE_8 (ap + fill_start, - fill_size * N_X_FRAC (8), - fill_end - fill_start); - fill_start = lxi; - fill_end = rxi; - fill_size = 1; - } - else - { - /* Update fill_start */ - if (lxi > fill_start) - { - ADD_SATURATE_8 (ap + fill_start, - fill_size * N_X_FRAC (8), - lxi - fill_start); - fill_start = lxi; - } - else if (lxi < fill_start) - { - ADD_SATURATE_8 (ap + lxi, N_X_FRAC (8), - fill_start - lxi); - } - - /* Update fill_end */ - if (rxi < fill_end) - { - ADD_SATURATE_8 (ap + rxi, - fill_size * N_X_FRAC (8), - fill_end - rxi); - fill_end = rxi; - } - else if (fill_end < rxi) - { - ADD_SATURATE_8 (ap + fill_end, - N_X_FRAC (8), - rxi - fill_end); - } - fill_size++; - } - } - } - else - { - ADD_SATURATE_8 (ap + lxi, N_X_FRAC (8), rxi - lxi); - } - - WRITE (image, ap + rxi, clip255 (READ (image, ap + rxi) + rxs)); - } - } - - if (y == b) - { - /* We're done, make sure we clean up any remaining fill. */ - if (fill_start != fill_end) - { - if (fill_size == N_Y_FRAC (8)) - { - MEMSET_WRAPPED (image, ap + fill_start, - 0xff, fill_end - fill_start); - } - else - { - ADD_SATURATE_8 (ap + fill_start, fill_size * N_X_FRAC (8), - fill_end - fill_start); - } - } - break; - } - - if (pixman_fixed_frac (y) != Y_FRAC_LAST (8)) - { - RENDER_EDGE_STEP_SMALL (l); - RENDER_EDGE_STEP_SMALL (r); - y += STEP_Y_SMALL (8); - } - else - { - RENDER_EDGE_STEP_BIG (l); - RENDER_EDGE_STEP_BIG (r); - y += STEP_Y_BIG (8); - if (fill_start != fill_end) - { - if (fill_size == N_Y_FRAC (8)) - { - MEMSET_WRAPPED (image, ap + fill_start, - 0xff, fill_end - fill_start); - } - else - { - ADD_SATURATE_8 (ap + fill_start, fill_size * N_X_FRAC (8), - fill_end - fill_start); - } - - fill_start = fill_end = -1; - fill_size = 0; - } - - line += stride; - } - } -} - -#ifndef PIXMAN_FB_ACCESSORS -static -#endif -void -PIXMAN_RASTERIZE_EDGES (pixman_image_t *image, - pixman_edge_t * l, - pixman_edge_t * r, - pixman_fixed_t t, - pixman_fixed_t b) -{ - switch (PIXMAN_FORMAT_BPP (image->bits.format)) - { - case 1: - rasterize_edges_1 (image, l, r, t, b); - break; - - case 4: - rasterize_edges_4 (image, l, r, t, b); - break; - - case 8: - rasterize_edges_8 (image, l, r, t, b); - break; - - default: - break; - } -} - -#ifndef PIXMAN_FB_ACCESSORS - -PIXMAN_EXPORT void -pixman_rasterize_edges (pixman_image_t *image, - pixman_edge_t * l, - pixman_edge_t * r, - pixman_fixed_t t, - pixman_fixed_t b) -{ - return_if_fail (image->type == BITS); - return_if_fail (PIXMAN_FORMAT_TYPE (image->bits.format) == PIXMAN_TYPE_A); - - if (image->bits.read_func || image->bits.write_func) - pixman_rasterize_edges_accessors (image, l, r, t, b); - else - pixman_rasterize_edges_no_accessors (image, l, r, t, b); -} - -#endif |