--- /dev/null
+/*
+ *
+ * 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.
+ */
+
+#include <config.h>
+#include "pixman-private.h"
+
+void
+_pixman_gradient_walker_init (GradientWalker *walker,
+ gradient_t *gradient,
+ unsigned int spread)
+{
+ walker->num_stops = gradient->n_stops;
+ walker->stops = gradient->stops;
+ walker->left_x = 0;
+ walker->right_x = 0x10000;
+ walker->stepper = 0;
+ walker->left_ag = 0;
+ walker->left_rb = 0;
+ walker->right_ag = 0;
+ walker->right_rb = 0;
+ walker->spread = spread;
+
+ walker->need_reset = TRUE;
+}
+
+void
+_pixman_gradient_walker_reset (GradientWalker *walker,
+ pixman_fixed_32_32_t pos)
+{
+ int32_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;
+
+ static const pixman_color_t transparent_black = { 0, 0, 0, 0 };
+
+ switch (walker->spread)
+ {
+ case PIXMAN_REPEAT_NORMAL:
+ x = (int32_t)pos & 0xFFFF;
+ for (n = 0; n < count; n++)
+ if (x < stops[n].x)
+ break;
+ if (n == 0) {
+ left_x = stops[count-1].x - 0x10000;
+ left_c = &stops[count-1].color;
+ } else {
+ left_x = stops[n-1].x;
+ left_c = &stops[n-1].color;
+ }
+
+ if (n == count) {
+ right_x = stops[0].x + 0x10000;
+ right_c = &stops[0].color;
+ } else {
+ right_x = stops[n].x;
+ right_c = &stops[n].color;
+ }
+ left_x += (pos - x);
+ right_x += (pos - x);
+ break;
+
+ case PIXMAN_REPEAT_PAD:
+ for (n = 0; n < count; n++)
+ if (pos < stops[n].x)
+ break;
+
+ if (n == 0) {
+ left_x = INT32_MIN;
+ left_c = &stops[0].color;
+ } else {
+ left_x = stops[n-1].x;
+ left_c = &stops[n-1].color;
+ }
+
+ if (n == count) {
+ right_x = INT32_MAX;
+ right_c = &stops[n-1].color;
+ } else {
+ right_x = stops[n].x;
+ right_c = &stops[n].color;
+ }
+ break;
+
+ case PIXMAN_REPEAT_REFLECT:
+ x = (int32_t)pos & 0xFFFF;
+ if ((int32_t)pos & 0x10000)
+ x = 0x10000 - x;
+ for (n = 0; n < count; n++)
+ if (x < stops[n].x)
+ break;
+
+ if (n == 0) {
+ left_x = -stops[0].x;
+ left_c = &stops[0].color;
+ } else {
+ left_x = stops[n-1].x;
+ left_c = &stops[n-1].color;
+ }
+
+ if (n == count) {
+ right_x = 0x20000 - stops[n-1].x;
+ right_c = &stops[n-1].color;
+ } else {
+ right_x = stops[n].x;
+ right_c = &stops[n].color;
+ }
+
+ 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);
+ break;
+
+ default: /* RepeatNone */
+ for (n = 0; n < count; n++)
+ if (pos < stops[n].x)
+ break;
+
+ if (n == 0)
+ {
+ left_x = INT32_MIN;
+ right_x = stops[0].x;
+ left_c = right_c = (pixman_color_t*) &transparent_black;
+ }
+ else if (n == count)
+ {
+ left_x = stops[n-1].x;
+ right_x = INT32_MAX;
+ left_c = right_c = (pixman_color_t*) &transparent_black;
+ }
+ else
+ {
+ left_x = stops[n-1].x;
+ right_x = stops[n].x;
+ left_c = &stops[n-1].color;
+ right_c = &stops[n].color;
+ }
+ }
+
+ walker->left_x = left_x;
+ walker->right_x = right_x;
+ walker->left_ag = ((left_c->alpha >> 8) << 16) | (left_c->green >> 8);
+ walker->left_rb = ((left_c->red & 0xff00) << 8) | (left_c->blue >> 8);
+ walker->right_ag = ((right_c->alpha >> 8) << 16) | (right_c->green >> 8);
+ walker->right_rb = ((right_c->red & 0xff00) << 8) | (right_c->blue >> 8);
+
+ if ( walker->left_x == walker->right_x ||
+ ( walker->left_ag == walker->right_ag &&
+ walker->left_rb == walker->right_rb ) )
+ {
+ walker->stepper = 0;
+ }
+ else
+ {
+ int32_t width = right_x - left_x;
+ walker->stepper = ((1 << 24) + width/2)/width;
+ }
+
+ walker->need_reset = FALSE;
+}
+
+#define PIXMAN_GRADIENT_WALKER_NEED_RESET(w,x) \
+ ( (w)->need_reset || (x) < (w)->left_x || (x) >= (w)->right_x)
+
+
+/* the following assumes that PIXMAN_GRADIENT_WALKER_NEED_RESET(w,x) is FALSE */
+uint32_t
+_pixman_gradient_walker_pixel (GradientWalker *walker,
+ pixman_fixed_32_32_t x)
+{
+ int dist, idist;
+ uint32_t t1, t2, a, color;
+
+ if (PIXMAN_GRADIENT_WALKER_NEED_RESET (walker, x))
+ _pixman_gradient_walker_reset (walker, x);
+
+ dist = ((int)(x - walker->left_x)*walker->stepper) >> 16;
+ idist = 256 - dist;
+
+ /* combined INTERPOLATE and premultiply */
+ t1 = walker->left_rb*idist + walker->right_rb*dist;
+ t1 = (t1 >> 8) & 0xff00ff;
+
+ t2 = walker->left_ag*idist + walker->right_ag*dist;
+ t2 &= 0xff00ff00;
+
+ color = t2 & 0xff000000;
+ a = t2 >> 24;
+
+ t1 = t1*a + 0x800080;
+ t1 = (t1 + ((t1 >> 8) & 0xff00ff)) >> 8;
+
+ t2 = (t2 >> 8)*a + 0x800080;
+ t2 = (t2 + ((t2 >> 8) & 0xff00ff));
+
+ return (color | (t1 & 0xff00ff) | (t2 & 0xff00));
+}
#include "pixman-private.h"
-typedef struct
-{
- uint32_t left_ag;
- uint32_t left_rb;
- uint32_t right_ag;
- uint32_t right_rb;
- int32_t left_x;
- int32_t right_x;
- int32_t stepper;
-
- pixman_gradient_stop_t *stops;
- int num_stops;
- unsigned int spread;
-
- int need_reset;
-} GradientWalker;
-
-static void
-_gradient_walker_init (GradientWalker *walker,
- gradient_t *gradient,
- unsigned int spread)
-{
- walker->num_stops = gradient->n_stops;
- walker->stops = gradient->stops;
- walker->left_x = 0;
- walker->right_x = 0x10000;
- walker->stepper = 0;
- walker->left_ag = 0;
- walker->left_rb = 0;
- walker->right_ag = 0;
- walker->right_rb = 0;
- walker->spread = spread;
-
- walker->need_reset = TRUE;
-}
-
-static void
-_gradient_walker_reset (GradientWalker *walker,
- pixman_fixed_32_32_t pos)
-{
- int32_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;
-
- static const pixman_color_t transparent_black = { 0, 0, 0, 0 };
-
- switch (walker->spread)
- {
- case PIXMAN_REPEAT_NORMAL:
- x = (int32_t)pos & 0xFFFF;
- for (n = 0; n < count; n++)
- if (x < stops[n].x)
- break;
- if (n == 0) {
- left_x = stops[count-1].x - 0x10000;
- left_c = &stops[count-1].color;
- } else {
- left_x = stops[n-1].x;
- left_c = &stops[n-1].color;
- }
-
- if (n == count) {
- right_x = stops[0].x + 0x10000;
- right_c = &stops[0].color;
- } else {
- right_x = stops[n].x;
- right_c = &stops[n].color;
- }
- left_x += (pos - x);
- right_x += (pos - x);
- break;
-
- case PIXMAN_REPEAT_PAD:
- for (n = 0; n < count; n++)
- if (pos < stops[n].x)
- break;
-
- if (n == 0) {
- left_x = INT32_MIN;
- left_c = &stops[0].color;
- } else {
- left_x = stops[n-1].x;
- left_c = &stops[n-1].color;
- }
-
- if (n == count) {
- right_x = INT32_MAX;
- right_c = &stops[n-1].color;
- } else {
- right_x = stops[n].x;
- right_c = &stops[n].color;
- }
- break;
-
- case PIXMAN_REPEAT_REFLECT:
- x = (int32_t)pos & 0xFFFF;
- if ((int32_t)pos & 0x10000)
- x = 0x10000 - x;
- for (n = 0; n < count; n++)
- if (x < stops[n].x)
- break;
-
- if (n == 0) {
- left_x = -stops[0].x;
- left_c = &stops[0].color;
- } else {
- left_x = stops[n-1].x;
- left_c = &stops[n-1].color;
- }
-
- if (n == count) {
- right_x = 0x20000 - stops[n-1].x;
- right_c = &stops[n-1].color;
- } else {
- right_x = stops[n].x;
- right_c = &stops[n].color;
- }
-
- 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);
- break;
-
- default: /* RepeatNone */
- for (n = 0; n < count; n++)
- if (pos < stops[n].x)
- break;
-
- if (n == 0)
- {
- left_x = INT32_MIN;
- right_x = stops[0].x;
- left_c = right_c = (pixman_color_t*) &transparent_black;
- }
- else if (n == count)
- {
- left_x = stops[n-1].x;
- right_x = INT32_MAX;
- left_c = right_c = (pixman_color_t*) &transparent_black;
- }
- else
- {
- left_x = stops[n-1].x;
- right_x = stops[n].x;
- left_c = &stops[n-1].color;
- right_c = &stops[n].color;
- }
- }
-
- walker->left_x = left_x;
- walker->right_x = right_x;
- walker->left_ag = ((left_c->alpha >> 8) << 16) | (left_c->green >> 8);
- walker->left_rb = ((left_c->red & 0xff00) << 8) | (left_c->blue >> 8);
- walker->right_ag = ((right_c->alpha >> 8) << 16) | (right_c->green >> 8);
- walker->right_rb = ((right_c->red & 0xff00) << 8) | (right_c->blue >> 8);
-
- if ( walker->left_x == walker->right_x ||
- ( walker->left_ag == walker->right_ag &&
- walker->left_rb == walker->right_rb ) )
- {
- walker->stepper = 0;
- }
- else
- {
- int32_t width = right_x - left_x;
- walker->stepper = ((1 << 24) + width/2)/width;
- }
-
- walker->need_reset = FALSE;
-}
-
-#define GRADIENT_WALKER_NEED_RESET(w,x) \
- ( (w)->need_reset || (x) < (w)->left_x || (x) >= (w)->right_x)
-
-
-/* the following assumes that GRADIENT_WALKER_NEED_RESET(w,x) is FALSE */
-static uint32_t
-_gradient_walker_pixel (GradientWalker *walker,
- pixman_fixed_32_32_t x)
-{
- int dist, idist;
- uint32_t t1, t2, a, color;
-
- if (GRADIENT_WALKER_NEED_RESET (walker, x))
- _gradient_walker_reset (walker, x);
-
- dist = ((int)(x - walker->left_x)*walker->stepper) >> 16;
- idist = 256 - dist;
-
- /* combined INTERPOLATE and premultiply */
- t1 = walker->left_rb*idist + walker->right_rb*dist;
- t1 = (t1 >> 8) & 0xff00ff;
-
- t2 = walker->left_ag*idist + walker->right_ag*dist;
- t2 &= 0xff00ff00;
-
- color = t2 & 0xff000000;
- a = t2 >> 24;
-
- t1 = t1*a + 0x800080;
- t1 = (t1 + ((t1 >> 8) & 0xff00ff)) >> 8;
-
- t2 = (t2 >> 8)*a + 0x800080;
- t2 = (t2 + ((t2 >> 8) & 0xff00ff));
-
- return (color | (t1 & 0xff00ff) | (t2 & 0xff00));
-}
-
void pixmanFetchSourcePict(source_image_t * pict, int x, int y, int width,
uint32_t *buffer, uint32_t *mask, uint32_t maskBits)
{
gradient = (gradient_t *)pict;
- _gradient_walker_init (&walker, gradient, pict->common.repeat);
+ _pixman_gradient_walker_init (&walker, gradient, pict->common.repeat);
if (pict->common.type == LINEAR) {
pixman_vector_t v, unit;
{
register uint32_t color;
- color = _gradient_walker_pixel( &walker, t );
+ color = _pixman_gradient_walker_pixel( &walker, t );
while (buffer < end)
*(buffer++) = color;
}
if (!mask) {
while (buffer < end)
{
- *(buffer) = _gradient_walker_pixel (&walker, t);
+ *(buffer) = _pixman_gradient_walker_pixel (&walker, t);
buffer += 1;
t += inc;
}
while (buffer < end) {
if (*mask++ & maskBits)
{
- *(buffer) = _gradient_walker_pixel (&walker, t);
+ *(buffer) = _pixman_gradient_walker_pixel (&walker, t);
}
buffer += 1;
t += inc;
t = ((a * x + b * y) >> 16) + off;
}
- color = _gradient_walker_pixel( &walker, t );
+ color = _pixman_gradient_walker_pixel( &walker, t );
while (buffer < end)
*(buffer++) = color;
}
y = ((pixman_fixed_48_16_t)v.vector[1] << 16) / v.vector[2];
t = ((a*x + b*y) >> 16) + off;
}
- *(buffer) = _gradient_walker_pixel (&walker, t);
+ *(buffer) = _pixman_gradient_walker_pixel (&walker, t);
}
++buffer;
v.vector[0] += unit.vector[0];
else
t = (pixman_fixed_48_16_t) ((- B + sqrt(det)) / (2.0 * radial->A) * 65536);
- *(buffer) = _gradient_walker_pixel (&walker, t);
+ *(buffer) = _pixman_gradient_walker_pixel (&walker, t);
}
++buffer;
else
t = (pixman_fixed_48_16_t) ((- B + sqrt(det)) / (2.0 * radial->A) * 65536);
- *(buffer) = _gradient_walker_pixel (&walker, t);
+ *(buffer) = _pixman_gradient_walker_pixel (&walker, t);
}
++buffer;
angle = atan2(ry, rx) + a;
t = (pixman_fixed_48_16_t) (angle * (65536. / (2*M_PI)));
- *(buffer) = _gradient_walker_pixel (&walker, t);
+ *(buffer) = _pixman_gradient_walker_pixel (&walker, t);
}
++buffer;
angle = atan2(y, x) + a;
t = (pixman_fixed_48_16_t) (angle * (65536. / (2*M_PI)));
- *(buffer) = _gradient_walker_pixel (&walker, t);
+ *(buffer) = _pixman_gradient_walker_pixel (&walker, t);
}
++buffer;
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