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-gradient-walker.c | |
parent | f567ea1e2798fd3156a416e61f083ea3e6b95719 (diff) |
switch to tinyobj and nanovg from assimp and cairo
Diffstat (limited to 'libs/pixman-0.40.0/pixman/pixman-gradient-walker.c')
-rw-r--r-- | libs/pixman-0.40.0/pixman/pixman-gradient-walker.c | 264 |
1 files changed, 0 insertions, 264 deletions
diff --git a/libs/pixman-0.40.0/pixman/pixman-gradient-walker.c b/libs/pixman-0.40.0/pixman/pixman-gradient-walker.c deleted file mode 100644 index fb7f401..0000000 --- a/libs/pixman-0.40.0/pixman/pixman-gradient-walker.c +++ /dev/null @@ -1,264 +0,0 @@ -/* - * - * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc. - * 2005 Lars Knoll & Zack Rusin, Trolltech - * - * 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. - * - * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS - * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND - * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS 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 "pixman-private.h" - -void -_pixman_gradient_walker_init (pixman_gradient_walker_t *walker, - gradient_t * gradient, - pixman_repeat_t repeat) -{ - walker->num_stops = gradient->n_stops; - walker->stops = gradient->stops; - walker->left_x = 0; - walker->right_x = 0x10000; - walker->a_s = 0.0f; - walker->a_b = 0.0f; - walker->r_s = 0.0f; - walker->r_b = 0.0f; - walker->g_s = 0.0f; - walker->g_b = 0.0f; - walker->b_s = 0.0f; - walker->b_b = 0.0f; - walker->repeat = repeat; - - walker->need_reset = TRUE; -} - -static void -gradient_walker_reset (pixman_gradient_walker_t *walker, - pixman_fixed_48_16_t pos) -{ - int64_t x, left_x, right_x; - pixman_color_t *left_c, *right_c; - int n, count = walker->num_stops; - pixman_gradient_stop_t *stops = walker->stops; - float la, lr, lg, lb; - float ra, rr, rg, rb; - float lx, rx; - - if (walker->repeat == PIXMAN_REPEAT_NORMAL) - { - x = (int32_t)pos & 0xffff; - } - else if (walker->repeat == PIXMAN_REPEAT_REFLECT) - { - x = (int32_t)pos & 0xffff; - if ((int32_t)pos & 0x10000) - x = 0x10000 - x; - } - else - { - x = pos; - } - - for (n = 0; n < count; n++) - { - if (x < stops[n].x) - break; - } - - left_x = stops[n - 1].x; - left_c = &stops[n - 1].color; - - right_x = stops[n].x; - right_c = &stops[n].color; - - if (walker->repeat == PIXMAN_REPEAT_NORMAL) - { - left_x += (pos - x); - right_x += (pos - x); - } - else if (walker->repeat == PIXMAN_REPEAT_REFLECT) - { - if ((int32_t)pos & 0x10000) - { - pixman_color_t *tmp_c; - int32_t tmp_x; - - tmp_x = 0x10000 - right_x; - right_x = 0x10000 - left_x; - left_x = tmp_x; - - tmp_c = right_c; - right_c = left_c; - left_c = tmp_c; - - x = 0x10000 - x; - } - left_x += (pos - x); - right_x += (pos - x); - } - else if (walker->repeat == PIXMAN_REPEAT_NONE) - { - if (n == 0) - right_c = left_c; - else if (n == count) - left_c = right_c; - } - - /* The alpha/red/green/blue channels are scaled to be in [0, 1]. - * This ensures that after premultiplication all channels will - * be in the [0, 1] interval. - */ - la = (left_c->alpha * (1.0f/257.0f)); - lr = (left_c->red * (1.0f/257.0f)); - lg = (left_c->green * (1.0f/257.0f)); - lb = (left_c->blue * (1.0f/257.0f)); - - ra = (right_c->alpha * (1.0f/257.0f)); - rr = (right_c->red * (1.0f/257.0f)); - rg = (right_c->green * (1.0f/257.0f)); - rb = (right_c->blue * (1.0f/257.0f)); - - lx = left_x * (1.0f/65536.0f); - rx = right_x * (1.0f/65536.0f); - - if (FLOAT_IS_ZERO (rx - lx) || left_x == INT32_MIN || right_x == INT32_MAX) - { - walker->a_s = walker->r_s = walker->g_s = walker->b_s = 0.0f; - walker->a_b = (la + ra) / 510.0f; - walker->r_b = (lr + rr) / 510.0f; - walker->g_b = (lg + rg) / 510.0f; - walker->b_b = (lb + rb) / 510.0f; - } - else - { - float w_rec = 1.0f / (rx - lx); - - walker->a_b = (la * rx - ra * lx) * w_rec * (1.0f/255.0f); - walker->r_b = (lr * rx - rr * lx) * w_rec * (1.0f/255.0f); - walker->g_b = (lg * rx - rg * lx) * w_rec * (1.0f/255.0f); - walker->b_b = (lb * rx - rb * lx) * w_rec * (1.0f/255.0f); - - walker->a_s = (ra - la) * w_rec * (1.0f/255.0f); - walker->r_s = (rr - lr) * w_rec * (1.0f/255.0f); - walker->g_s = (rg - lg) * w_rec * (1.0f/255.0f); - walker->b_s = (rb - lb) * w_rec * (1.0f/255.0f); - } - - walker->left_x = left_x; - walker->right_x = right_x; - - walker->need_reset = FALSE; -} - -static argb_t -pixman_gradient_walker_pixel_float (pixman_gradient_walker_t *walker, - pixman_fixed_48_16_t x) -{ - argb_t f; - float y; - - if (walker->need_reset || x < walker->left_x || x >= walker->right_x) - gradient_walker_reset (walker, x); - - y = x * (1.0f / 65536.0f); - - f.a = walker->a_s * y + walker->a_b; - f.r = f.a * (walker->r_s * y + walker->r_b); - f.g = f.a * (walker->g_s * y + walker->g_b); - f.b = f.a * (walker->b_s * y + walker->b_b); - - return f; -} - -static uint32_t -pixman_gradient_walker_pixel_32 (pixman_gradient_walker_t *walker, - pixman_fixed_48_16_t x) -{ - argb_t f; - float y; - - if (walker->need_reset || x < walker->left_x || x >= walker->right_x) - gradient_walker_reset (walker, x); - - y = x * (1.0f / 65536.0f); - - /* Instead of [0...1] for ARGB, we want [0...255], - * multiply alpha with 255 and the color channels - * also get multiplied by the alpha multiplier. - * - * We don't use pixman_contract_from_float because it causes a 2x - * slowdown to do so, and the values are already normalized, - * so we don't have to worry about values < 0.f or > 1.f - */ - f.a = 255.f * (walker->a_s * y + walker->a_b); - f.r = f.a * (walker->r_s * y + walker->r_b); - f.g = f.a * (walker->g_s * y + walker->g_b); - f.b = f.a * (walker->b_s * y + walker->b_b); - - return (((uint32_t)(f.a + .5f) << 24) & 0xff000000) | - (((uint32_t)(f.r + .5f) << 16) & 0x00ff0000) | - (((uint32_t)(f.g + .5f) << 8) & 0x0000ff00) | - (((uint32_t)(f.b + .5f) >> 0) & 0x000000ff); -} - -void -_pixman_gradient_walker_write_narrow (pixman_gradient_walker_t *walker, - pixman_fixed_48_16_t x, - uint32_t *buffer) -{ - *buffer = pixman_gradient_walker_pixel_32 (walker, x); -} - -void -_pixman_gradient_walker_write_wide (pixman_gradient_walker_t *walker, - pixman_fixed_48_16_t x, - uint32_t *buffer) -{ - *(argb_t *)buffer = pixman_gradient_walker_pixel_float (walker, x); -} - -void -_pixman_gradient_walker_fill_narrow (pixman_gradient_walker_t *walker, - pixman_fixed_48_16_t x, - uint32_t *buffer, - uint32_t *end) -{ - register uint32_t color; - - color = pixman_gradient_walker_pixel_32 (walker, x); - while (buffer < end) - *buffer++ = color; -} - -void -_pixman_gradient_walker_fill_wide (pixman_gradient_walker_t *walker, - pixman_fixed_48_16_t x, - uint32_t *buffer, - uint32_t *end) -{ - register argb_t color; - argb_t *buffer_wide = (argb_t *)buffer; - argb_t *end_wide = (argb_t *)end; - - color = pixman_gradient_walker_pixel_float (walker, x); - while (buffer_wide < end_wide) - *buffer_wide++ = color; -} |