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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.c264
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;
-}
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