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-rw-r--r--pixman/pixman/pixman-linear-gradient.c585
1 files changed, 291 insertions, 294 deletions
diff --git a/pixman/pixman/pixman-linear-gradient.c b/pixman/pixman/pixman-linear-gradient.c
index d9409fe50..20a8b7827 100644
--- a/pixman/pixman/pixman-linear-gradient.c
+++ b/pixman/pixman/pixman-linear-gradient.c
@@ -1,294 +1,291 @@
-/*
- * Copyright © 2000 SuSE, Inc.
- * Copyright © 2007 Red Hat, Inc.
- * 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 <stdlib.h>
-#include "pixman-private.h"
-
-static source_image_class_t
-linear_gradient_classify (pixman_image_t *image,
- int x,
- int y,
- int width,
- int height)
-{
- linear_gradient_t *linear = (linear_gradient_t *)image;
- pixman_vector_t v;
- pixman_fixed_32_32_t l;
- pixman_fixed_48_16_t dx, dy, a, b, off;
- pixman_fixed_48_16_t factors[4];
- int i;
-
- image->source.class = SOURCE_IMAGE_CLASS_UNKNOWN;
-
- dx = linear->p2.x - linear->p1.x;
- dy = linear->p2.y - linear->p1.y;
-
- l = dx * dx + dy * dy;
-
- if (l)
- {
- a = (dx << 32) / l;
- b = (dy << 32) / l;
- }
- else
- {
- a = b = 0;
- }
-
- off = (-a * linear->p1.x
- -b * linear->p1.y) >> 16;
-
- for (i = 0; i < 3; i++)
- {
- v.vector[0] = pixman_int_to_fixed ((i % 2) * (width - 1) + x);
- v.vector[1] = pixman_int_to_fixed ((i / 2) * (height - 1) + y);
- v.vector[2] = pixman_fixed_1;
-
- if (image->common.transform)
- {
- if (!pixman_transform_point_3d (image->common.transform, &v))
- {
- image->source.class = SOURCE_IMAGE_CLASS_UNKNOWN;
-
- return image->source.class;
- }
- }
-
- factors[i] = ((a * v.vector[0] + b * v.vector[1]) >> 16) + off;
- }
-
- if (factors[2] == factors[0])
- image->source.class = SOURCE_IMAGE_CLASS_HORIZONTAL;
- else if (factors[1] == factors[0])
- image->source.class = SOURCE_IMAGE_CLASS_VERTICAL;
-
- return image->source.class;
-}
-
-static void
-linear_gradient_get_scanline_32 (pixman_image_t *image,
- int x,
- int y,
- int width,
- uint32_t * buffer,
- const uint32_t *mask,
- uint32_t mask_bits)
-{
- pixman_vector_t v, unit;
- pixman_fixed_32_32_t l;
- pixman_fixed_48_16_t dx, dy, a, b, off;
- gradient_t *gradient = (gradient_t *)image;
- source_image_t *source = (source_image_t *)image;
- linear_gradient_t *linear = (linear_gradient_t *)image;
- uint32_t *end = buffer + width;
- pixman_gradient_walker_t walker;
-
- _pixman_gradient_walker_init (&walker, gradient, source->common.repeat);
-
- /* reference point is the center of the pixel */
- v.vector[0] = pixman_int_to_fixed (x) + pixman_fixed_1 / 2;
- v.vector[1] = pixman_int_to_fixed (y) + pixman_fixed_1 / 2;
- v.vector[2] = pixman_fixed_1;
-
- if (source->common.transform)
- {
- if (!pixman_transform_point_3d (source->common.transform, &v))
- return;
-
- unit.vector[0] = source->common.transform->matrix[0][0];
- unit.vector[1] = source->common.transform->matrix[1][0];
- unit.vector[2] = source->common.transform->matrix[2][0];
- }
- else
- {
- unit.vector[0] = pixman_fixed_1;
- unit.vector[1] = 0;
- unit.vector[2] = 0;
- }
-
- dx = linear->p2.x - linear->p1.x;
- dy = linear->p2.y - linear->p1.y;
-
- l = dx * dx + dy * dy;
-
- if (l != 0)
- {
- a = (dx << 32) / l;
- b = (dy << 32) / l;
- off = (-a * linear->p1.x
- -b * linear->p1.y) >> 16;
- }
-
- if (l == 0 || (unit.vector[2] == 0 && v.vector[2] == pixman_fixed_1))
- {
- pixman_fixed_48_16_t inc, t;
-
- /* affine transformation only */
- if (l == 0)
- {
- t = 0;
- inc = 0;
- }
- else
- {
- t = ((a * v.vector[0] + b * v.vector[1]) >> 16) + off;
- inc = (a * unit.vector[0] + b * unit.vector[1]) >> 16;
- }
-
- if (source->class == SOURCE_IMAGE_CLASS_VERTICAL)
- {
- register uint32_t color;
-
- color = _pixman_gradient_walker_pixel (&walker, t);
- while (buffer < end)
- *buffer++ = color;
- }
- else
- {
- if (!mask)
- {
- while (buffer < end)
- {
- *buffer++ = _pixman_gradient_walker_pixel (&walker, t);
-
- t += inc;
- }
- }
- else
- {
- while (buffer < end)
- {
- if (*mask++ & mask_bits)
- *buffer = _pixman_gradient_walker_pixel (&walker, t);
-
- buffer++;
- t += inc;
- }
- }
- }
- }
- else
- {
- /* projective transformation */
- pixman_fixed_48_16_t t;
-
- if (source->class == SOURCE_IMAGE_CLASS_VERTICAL)
- {
- register uint32_t color;
-
- if (v.vector[2] == 0)
- {
- t = 0;
- }
- else
- {
- pixman_fixed_48_16_t x, y;
-
- x = ((pixman_fixed_48_16_t) v.vector[0] << 16) / v.vector[2];
- y = ((pixman_fixed_48_16_t) v.vector[1] << 16) / v.vector[2];
- t = ((a * x + b * y) >> 16) + off;
- }
-
- color = _pixman_gradient_walker_pixel (&walker, t);
- while (buffer < end)
- *buffer++ = color;
- }
- else
- {
- while (buffer < end)
- {
- if (!mask || *mask++ & mask_bits)
- {
- if (v.vector[2] == 0)
- {
- t = 0;
- }
- else
- {
- pixman_fixed_48_16_t x, y;
- x = ((pixman_fixed_48_16_t)v.vector[0] << 16) / v.vector[2];
- y = ((pixman_fixed_48_16_t)v.vector[1] << 16) / v.vector[2];
- t = ((a * x + b * y) >> 16) + off;
- }
-
- *buffer = _pixman_gradient_walker_pixel (&walker, t);
- }
-
- ++buffer;
-
- v.vector[0] += unit.vector[0];
- v.vector[1] += unit.vector[1];
- v.vector[2] += unit.vector[2];
- }
- }
- }
-}
-
-static void
-linear_gradient_property_changed (pixman_image_t *image)
-{
- image->common.get_scanline_32 = linear_gradient_get_scanline_32;
- image->common.get_scanline_64 = _pixman_image_get_scanline_generic_64;
-}
-
-PIXMAN_EXPORT pixman_image_t *
-pixman_image_create_linear_gradient (pixman_point_fixed_t * p1,
- pixman_point_fixed_t * p2,
- const pixman_gradient_stop_t *stops,
- int n_stops)
-{
- pixman_image_t *image;
- linear_gradient_t *linear;
-
- return_val_if_fail (n_stops >= 2, NULL);
-
- image = _pixman_image_allocate ();
-
- if (!image)
- return NULL;
-
- linear = &image->linear;
-
- if (!_pixman_init_gradient (&linear->common, stops, n_stops))
- {
- free (image);
- return NULL;
- }
-
- linear->p1 = *p1;
- linear->p2 = *p2;
-
- image->type = LINEAR;
- image->source.class = SOURCE_IMAGE_CLASS_UNKNOWN;
- image->common.classify = linear_gradient_classify;
- image->common.property_changed = linear_gradient_property_changed;
-
- return image;
-}
-
+/*
+ * Copyright © 2000 SuSE, Inc.
+ * Copyright © 2007 Red Hat, Inc.
+ * 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 <stdlib.h>
+#include "pixman-private.h"
+
+static source_image_class_t
+linear_gradient_classify (pixman_image_t *image,
+ int x,
+ int y,
+ int width,
+ int height)
+{
+ linear_gradient_t *linear = (linear_gradient_t *)image;
+ pixman_vector_t v;
+ pixman_fixed_32_32_t l;
+ pixman_fixed_48_16_t dx, dy, a, b, off;
+ pixman_fixed_48_16_t factors[4];
+ int i;
+
+ image->source.class = SOURCE_IMAGE_CLASS_UNKNOWN;
+
+ dx = linear->p2.x - linear->p1.x;
+ dy = linear->p2.y - linear->p1.y;
+
+ l = dx * dx + dy * dy;
+
+ if (l)
+ {
+ a = (dx << 32) / l;
+ b = (dy << 32) / l;
+ }
+ else
+ {
+ a = b = 0;
+ }
+
+ off = (-a * linear->p1.x
+ -b * linear->p1.y) >> 16;
+
+ for (i = 0; i < 3; i++)
+ {
+ v.vector[0] = pixman_int_to_fixed ((i % 2) * (width - 1) + x);
+ v.vector[1] = pixman_int_to_fixed ((i / 2) * (height - 1) + y);
+ v.vector[2] = pixman_fixed_1;
+
+ if (image->common.transform)
+ {
+ if (!pixman_transform_point_3d (image->common.transform, &v))
+ {
+ image->source.class = SOURCE_IMAGE_CLASS_UNKNOWN;
+
+ return image->source.class;
+ }
+ }
+
+ factors[i] = ((a * v.vector[0] + b * v.vector[1]) >> 16) + off;
+ }
+
+ if (factors[2] == factors[0])
+ image->source.class = SOURCE_IMAGE_CLASS_HORIZONTAL;
+ else if (factors[1] == factors[0])
+ image->source.class = SOURCE_IMAGE_CLASS_VERTICAL;
+
+ return image->source.class;
+}
+
+static void
+linear_gradient_get_scanline_32 (pixman_image_t *image,
+ int x,
+ int y,
+ int width,
+ uint32_t * buffer,
+ const uint32_t *mask)
+{
+ pixman_vector_t v, unit;
+ pixman_fixed_32_32_t l;
+ pixman_fixed_48_16_t dx, dy, a, b, off;
+ gradient_t *gradient = (gradient_t *)image;
+ source_image_t *source = (source_image_t *)image;
+ linear_gradient_t *linear = (linear_gradient_t *)image;
+ uint32_t *end = buffer + width;
+ pixman_gradient_walker_t walker;
+
+ _pixman_gradient_walker_init (&walker, gradient, source->common.repeat);
+
+ /* reference point is the center of the pixel */
+ v.vector[0] = pixman_int_to_fixed (x) + pixman_fixed_1 / 2;
+ v.vector[1] = pixman_int_to_fixed (y) + pixman_fixed_1 / 2;
+ v.vector[2] = pixman_fixed_1;
+
+ if (source->common.transform)
+ {
+ if (!pixman_transform_point_3d (source->common.transform, &v))
+ return;
+
+ unit.vector[0] = source->common.transform->matrix[0][0];
+ unit.vector[1] = source->common.transform->matrix[1][0];
+ unit.vector[2] = source->common.transform->matrix[2][0];
+ }
+ else
+ {
+ unit.vector[0] = pixman_fixed_1;
+ unit.vector[1] = 0;
+ unit.vector[2] = 0;
+ }
+
+ dx = linear->p2.x - linear->p1.x;
+ dy = linear->p2.y - linear->p1.y;
+
+ l = dx * dx + dy * dy;
+
+ if (l != 0)
+ {
+ a = (dx << 32) / l;
+ b = (dy << 32) / l;
+ off = (-a * linear->p1.x
+ -b * linear->p1.y) >> 16;
+ }
+
+ if (l == 0 || (unit.vector[2] == 0 && v.vector[2] == pixman_fixed_1))
+ {
+ pixman_fixed_48_16_t inc, t;
+
+ /* affine transformation only */
+ if (l == 0)
+ {
+ t = 0;
+ inc = 0;
+ }
+ else
+ {
+ t = ((a * v.vector[0] + b * v.vector[1]) >> 16) + off;
+ inc = (a * unit.vector[0] + b * unit.vector[1]) >> 16;
+ }
+
+ if (source->class == SOURCE_IMAGE_CLASS_VERTICAL)
+ {
+ register uint32_t color;
+
+ color = _pixman_gradient_walker_pixel (&walker, t);
+ while (buffer < end)
+ *buffer++ = color;
+ }
+ else
+ {
+ if (!mask)
+ {
+ while (buffer < end)
+ {
+ *buffer++ = _pixman_gradient_walker_pixel (&walker, t);
+
+ t += inc;
+ }
+ }
+ else
+ {
+ while (buffer < end)
+ {
+ if (*mask++)
+ *buffer = _pixman_gradient_walker_pixel (&walker, t);
+
+ buffer++;
+ t += inc;
+ }
+ }
+ }
+ }
+ else
+ {
+ /* projective transformation */
+ pixman_fixed_48_16_t t;
+
+ if (source->class == SOURCE_IMAGE_CLASS_VERTICAL)
+ {
+ register uint32_t color;
+
+ if (v.vector[2] == 0)
+ {
+ t = 0;
+ }
+ else
+ {
+ pixman_fixed_48_16_t x, y;
+
+ x = ((pixman_fixed_48_16_t) v.vector[0] << 16) / v.vector[2];
+ y = ((pixman_fixed_48_16_t) v.vector[1] << 16) / v.vector[2];
+ t = ((a * x + b * y) >> 16) + off;
+ }
+
+ color = _pixman_gradient_walker_pixel (&walker, t);
+ while (buffer < end)
+ *buffer++ = color;
+ }
+ else
+ {
+ while (buffer < end)
+ {
+ if (!mask || *mask++)
+ {
+ if (v.vector[2] == 0)
+ {
+ t = 0;
+ }
+ else
+ {
+ pixman_fixed_48_16_t x, y;
+ x = ((pixman_fixed_48_16_t)v.vector[0] << 16) / v.vector[2];
+ y = ((pixman_fixed_48_16_t)v.vector[1] << 16) / v.vector[2];
+ t = ((a * x + b * y) >> 16) + off;
+ }
+
+ *buffer = _pixman_gradient_walker_pixel (&walker, t);
+ }
+
+ ++buffer;
+
+ v.vector[0] += unit.vector[0];
+ v.vector[1] += unit.vector[1];
+ v.vector[2] += unit.vector[2];
+ }
+ }
+ }
+}
+
+static void
+linear_gradient_property_changed (pixman_image_t *image)
+{
+ image->common.get_scanline_32 = linear_gradient_get_scanline_32;
+ image->common.get_scanline_64 = _pixman_image_get_scanline_generic_64;
+}
+
+PIXMAN_EXPORT pixman_image_t *
+pixman_image_create_linear_gradient (pixman_point_fixed_t * p1,
+ pixman_point_fixed_t * p2,
+ const pixman_gradient_stop_t *stops,
+ int n_stops)
+{
+ pixman_image_t *image;
+ linear_gradient_t *linear;
+
+ image = _pixman_image_allocate ();
+
+ if (!image)
+ return NULL;
+
+ linear = &image->linear;
+
+ if (!_pixman_init_gradient (&linear->common, stops, n_stops))
+ {
+ free (image);
+ return NULL;
+ }
+
+ linear->p1 = *p1;
+ linear->p2 = *p2;
+
+ image->type = LINEAR;
+ image->source.class = SOURCE_IMAGE_CLASS_UNKNOWN;
+ image->common.classify = linear_gradient_classify;
+ image->common.property_changed = linear_gradient_property_changed;
+
+ return image;
+}
+
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