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-rw-r--r--pixman/pixman-conical-gradient.c36
-rw-r--r--pixman/pixman-gradient-walker.c114
-rw-r--r--pixman/pixman-linear-gradient.c47
-rw-r--r--pixman/pixman-private.h35
-rw-r--r--pixman/pixman-radial-gradient.c112
5 files changed, 234 insertions, 110 deletions
diff --git a/pixman/pixman-conical-gradient.c b/pixman/pixman-conical-gradient.c
index 8bb46ae..a39e20c 100644
--- a/pixman/pixman-conical-gradient.c
+++ b/pixman/pixman-conical-gradient.c
@@ -51,7 +51,10 @@ coordinates_to_parameter (double x, double y, double angle)
}
static uint32_t *
-conical_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
+conical_get_scanline (pixman_iter_t *iter,
+ const uint32_t *mask,
+ int Bpp,
+ pixman_gradient_walker_write_t write_pixel)
{
pixman_image_t *image = iter->image;
int x = iter->x;
@@ -61,7 +64,7 @@ conical_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
gradient_t *gradient = (gradient_t *)image;
conical_gradient_t *conical = (conical_gradient_t *)image;
- uint32_t *end = buffer + width;
+ uint32_t *end = buffer + width * (Bpp / 4);
pixman_gradient_walker_t walker;
pixman_bool_t affine = TRUE;
double cx = 1.;
@@ -109,11 +112,12 @@ conical_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
{
double t = coordinates_to_parameter (rx, ry, conical->angle);
- *buffer = _pixman_gradient_walker_pixel (
- &walker, (pixman_fixed_48_16_t)pixman_double_to_fixed (t));
+ write_pixel (&walker,
+ (pixman_fixed_48_16_t)pixman_double_to_fixed (t),
+ buffer);
}
- ++buffer;
+ buffer += (Bpp / 4);
rx += cx;
ry += cy;
@@ -144,11 +148,12 @@ conical_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
t = coordinates_to_parameter (x, y, conical->angle);
- *buffer = _pixman_gradient_walker_pixel (
- &walker, (pixman_fixed_48_16_t)pixman_double_to_fixed (t));
+ write_pixel (&walker,
+ (pixman_fixed_48_16_t)pixman_double_to_fixed (t),
+ buffer);
}
- ++buffer;
+ buffer += (Bpp / 4);
rx += cx;
ry += cy;
@@ -161,14 +166,17 @@ conical_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
}
static uint32_t *
-conical_get_scanline_wide (pixman_iter_t *iter, const uint32_t *mask)
+conical_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
{
- uint32_t *buffer = conical_get_scanline_narrow (iter, NULL);
-
- pixman_expand_to_float (
- (argb_t *)buffer, buffer, PIXMAN_a8r8g8b8, iter->width);
+ return conical_get_scanline (iter, mask, 4,
+ _pixman_gradient_walker_write_narrow);
+}
- return buffer;
+static uint32_t *
+conical_get_scanline_wide (pixman_iter_t *iter, const uint32_t *mask)
+{
+ return conical_get_scanline (iter, NULL, 16,
+ _pixman_gradient_walker_write_wide);
}
void
diff --git a/pixman/pixman-gradient-walker.c b/pixman/pixman-gradient-walker.c
index 822f8e6..af4df58 100644
--- a/pixman/pixman-gradient-walker.c
+++ b/pixman/pixman-gradient-walker.c
@@ -122,10 +122,9 @@ gradient_walker_reset (pixman_gradient_walker_t *walker,
left_c = right_c;
}
- /* The alpha channel is scaled to be in the [0, 255] interval,
- * and the red/green/blue channels are scaled to be in [0, 1].
+ /* 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, 255] interval.
+ * be in the [0, 1] interval.
*/
la = (left_c->alpha * (1.0f/257.0f));
lr = (left_c->red * (1.0f/257.0f));
@@ -143,7 +142,7 @@ gradient_walker_reset (pixman_gradient_walker_t *walker,
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) / 2.0f;
+ 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;
@@ -152,12 +151,12 @@ gradient_walker_reset (pixman_gradient_walker_t *walker,
{
float w_rec = 1.0f / (rx - lx);
- walker->a_b = (la * rx - ra * lx) * w_rec;
+ 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;
+ 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);
@@ -169,34 +168,97 @@ gradient_walker_reset (pixman_gradient_walker_t *walker,
walker->need_reset = FALSE;
}
-uint32_t
-_pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
- pixman_fixed_48_16_t x)
+static argb_t
+pixman_gradient_walker_pixel_float (pixman_gradient_walker_t *walker,
+ pixman_fixed_48_16_t x)
{
- float a, r, g, b;
- uint8_t a8, r8, g8, b8;
- uint32_t v;
+ argb_t f;
float y;
if (walker->need_reset || x < walker->left_x || x >= walker->right_x)
- gradient_walker_reset (walker, x);
+ gradient_walker_reset (walker, x);
y = x * (1.0f / 65536.0f);
- a = walker->a_s * y + walker->a_b;
- r = a * (walker->r_s * y + walker->r_b);
- g = a * (walker->g_s * y + walker->g_b);
- b = a * (walker->b_s * y + walker->b_b);
+ 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);
- a8 = a + 0.5f;
- r8 = r + 0.5f;
- g8 = g + 0.5f;
- b8 = b + 0.5f;
+ 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);
- v = ((a8 << 24) & 0xff000000) |
- ((r8 << 16) & 0x00ff0000) |
- ((g8 << 8) & 0x0000ff00) |
- ((b8 >> 0) & 0x000000ff);
+ return (((uint8_t)(f.a + .5f) << 24) & 0xff000000) |
+ (((uint8_t)(f.r + .5f) << 16) & 0x00ff0000) |
+ (((uint8_t)(f.g + .5f) << 8) & 0x0000ff00) |
+ (((uint8_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;
- return v;
+ color = pixman_gradient_walker_pixel_float (walker, x);
+ while (buffer_wide < end_wide)
+ *buffer_wide++ = color;
}
diff --git a/pixman/pixman-linear-gradient.c b/pixman/pixman-linear-gradient.c
index 40c8c9f..3f52850 100644
--- a/pixman/pixman-linear-gradient.c
+++ b/pixman/pixman-linear-gradient.c
@@ -89,8 +89,11 @@ linear_gradient_is_horizontal (pixman_image_t *image,
}
static uint32_t *
-linear_get_scanline_narrow (pixman_iter_t *iter,
- const uint32_t *mask)
+linear_get_scanline (pixman_iter_t *iter,
+ const uint32_t *mask,
+ int Bpp,
+ pixman_gradient_walker_write_t write_pixel,
+ pixman_gradient_walker_fill_t fill_pixel)
{
pixman_image_t *image = iter->image;
int x = iter->x;
@@ -103,7 +106,7 @@ linear_get_scanline_narrow (pixman_iter_t *iter,
pixman_fixed_48_16_t dx, dy;
gradient_t *gradient = (gradient_t *)image;
linear_gradient_t *linear = (linear_gradient_t *)image;
- uint32_t *end = buffer + width;
+ uint32_t *end = buffer + width * (Bpp / 4);
pixman_gradient_walker_t walker;
_pixman_gradient_walker_init (&walker, gradient, image->common.repeat);
@@ -137,7 +140,7 @@ linear_get_scanline_narrow (pixman_iter_t *iter,
if (l == 0 || unit.vector[2] == 0)
{
/* affine transformation only */
- pixman_fixed_32_32_t t, next_inc;
+ pixman_fixed_32_32_t t, next_inc;
double inc;
if (l == 0 || v.vector[2] == 0)
@@ -152,7 +155,7 @@ linear_get_scanline_narrow (pixman_iter_t *iter,
invden = pixman_fixed_1 * (double) pixman_fixed_1 /
(l * (double) v.vector[2]);
v2 = v.vector[2] * (1. / pixman_fixed_1);
- t = ((dx * v.vector[0] + dy * v.vector[1]) -
+ t = ((dx * v.vector[0] + dy * v.vector[1]) -
(dx * linear->p1.x + dy * linear->p1.y) * v2) * invden;
inc = (dx * unit.vector[0] + dy * unit.vector[1]) * invden;
}
@@ -160,11 +163,7 @@ linear_get_scanline_narrow (pixman_iter_t *iter,
if (((pixman_fixed_32_32_t )(inc * width)) == 0)
{
- register uint32_t color;
-
- color = _pixman_gradient_walker_pixel (&walker, t);
- while (buffer < end)
- *buffer++ = color;
+ fill_pixel (&walker, t, buffer, end);
}
else
{
@@ -175,12 +174,11 @@ linear_get_scanline_narrow (pixman_iter_t *iter,
{
if (!mask || *mask++)
{
- *buffer = _pixman_gradient_walker_pixel (&walker,
- t + next_inc);
+ write_pixel (&walker, t + next_inc, buffer);
}
i++;
next_inc = inc * i;
- buffer++;
+ buffer += (Bpp / 4);
}
}
}
@@ -202,14 +200,14 @@ linear_get_scanline_narrow (pixman_iter_t *iter,
invden = pixman_fixed_1 * (double) pixman_fixed_1 /
(l * (double) v.vector[2]);
v2 = v.vector[2] * (1. / pixman_fixed_1);
- t = ((dx * v.vector[0] + dy * v.vector[1]) -
+ t = ((dx * v.vector[0] + dy * v.vector[1]) -
(dx * linear->p1.x + dy * linear->p1.y) * v2) * invden;
}
- *buffer = _pixman_gradient_walker_pixel (&walker, t);
+ write_pixel (&walker, t, buffer);
}
- ++buffer;
+ buffer += (Bpp / 4);
v.vector[0] += unit.vector[0];
v.vector[1] += unit.vector[1];
@@ -223,14 +221,21 @@ linear_get_scanline_narrow (pixman_iter_t *iter,
}
static uint32_t *
-linear_get_scanline_wide (pixman_iter_t *iter, const uint32_t *mask)
+linear_get_scanline_narrow (pixman_iter_t *iter,
+ const uint32_t *mask)
{
- uint32_t *buffer = linear_get_scanline_narrow (iter, NULL);
+ return linear_get_scanline (iter, mask, 4,
+ _pixman_gradient_walker_write_narrow,
+ _pixman_gradient_walker_fill_narrow);
+}
- pixman_expand_to_float (
- (argb_t *)buffer, buffer, PIXMAN_a8r8g8b8, iter->width);
- return buffer;
+static uint32_t *
+linear_get_scanline_wide (pixman_iter_t *iter, const uint32_t *mask)
+{
+ return linear_get_scanline (iter, NULL, 16,
+ _pixman_gradient_walker_write_wide,
+ _pixman_gradient_walker_fill_wide);
}
void
diff --git a/pixman/pixman-private.h b/pixman/pixman-private.h
index 73a5414..1bd9695 100644
--- a/pixman/pixman-private.h
+++ b/pixman/pixman-private.h
@@ -363,9 +363,38 @@ void
_pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
pixman_fixed_48_16_t pos);
-uint32_t
-_pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
- pixman_fixed_48_16_t x);
+typedef void (*pixman_gradient_walker_write_t) (
+ pixman_gradient_walker_t *walker,
+ pixman_fixed_48_16_t x,
+ uint32_t *buffer);
+
+void
+_pixman_gradient_walker_write_narrow(pixman_gradient_walker_t *walker,
+ pixman_fixed_48_16_t x,
+ uint32_t *buffer);
+
+void
+_pixman_gradient_walker_write_wide(pixman_gradient_walker_t *walker,
+ pixman_fixed_48_16_t x,
+ uint32_t *buffer);
+
+typedef void (*pixman_gradient_walker_fill_t) (
+ pixman_gradient_walker_t *walker,
+ pixman_fixed_48_16_t x,
+ uint32_t *buffer,
+ uint32_t *end);
+
+void
+_pixman_gradient_walker_fill_narrow(pixman_gradient_walker_t *walker,
+ pixman_fixed_48_16_t x,
+ uint32_t *buffer,
+ uint32_t *end);
+
+void
+_pixman_gradient_walker_fill_wide(pixman_gradient_walker_t *walker,
+ pixman_fixed_48_16_t x,
+ uint32_t *buffer,
+ uint32_t *end);
/*
* Edges
diff --git a/pixman/pixman-radial-gradient.c b/pixman/pixman-radial-gradient.c
index 6a21796..0367d78 100644
--- a/pixman/pixman-radial-gradient.c
+++ b/pixman/pixman-radial-gradient.c
@@ -66,15 +66,18 @@ fdot (double x1,
return x1 * x2 + y1 * y2 + z1 * z2;
}
-static uint32_t
-radial_compute_color (double a,
- double b,
- double c,
- double inva,
- double dr,
- double mindr,
- pixman_gradient_walker_t *walker,
- pixman_repeat_t repeat)
+static void
+radial_write_color (double a,
+ double b,
+ double c,
+ double inva,
+ double dr,
+ double mindr,
+ pixman_gradient_walker_t *walker,
+ pixman_repeat_t repeat,
+ int Bpp,
+ pixman_gradient_walker_write_t write_pixel,
+ uint32_t *buffer)
{
/*
* In this function error propagation can lead to bad results:
@@ -99,21 +102,25 @@ radial_compute_color (double a,
double t;
if (b == 0)
- return 0;
+ {
+ memset (buffer, 0, Bpp);
+ return;
+ }
t = pixman_fixed_1 / 2 * c / b;
if (repeat == PIXMAN_REPEAT_NONE)
{
if (0 <= t && t <= pixman_fixed_1)
- return _pixman_gradient_walker_pixel (walker, t);
+ return write_pixel (walker, t, buffer);
}
else
{
if (t * dr >= mindr)
- return _pixman_gradient_walker_pixel (walker, t);
+ return write_pixel (walker, t, buffer);
}
- return 0;
+ memset (buffer, 0, Bpp);
+ return;
}
discr = fdot (b, a, 0, b, -c, 0);
@@ -139,24 +146,28 @@ radial_compute_color (double a,
if (repeat == PIXMAN_REPEAT_NONE)
{
if (0 <= t0 && t0 <= pixman_fixed_1)
- return _pixman_gradient_walker_pixel (walker, t0);
+ return write_pixel (walker, t0, buffer);
else if (0 <= t1 && t1 <= pixman_fixed_1)
- return _pixman_gradient_walker_pixel (walker, t1);
+ return write_pixel (walker, t1, buffer);
}
else
{
if (t0 * dr >= mindr)
- return _pixman_gradient_walker_pixel (walker, t0);
+ return write_pixel (walker, t0, buffer);
else if (t1 * dr >= mindr)
- return _pixman_gradient_walker_pixel (walker, t1);
+ return write_pixel (walker, t1, buffer);
}
}
- return 0;
+ memset (buffer, 0, Bpp);
+ return;
}
static uint32_t *
-radial_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
+radial_get_scanline (pixman_iter_t *iter,
+ const uint32_t *mask,
+ int Bpp,
+ pixman_gradient_walker_write_t write_pixel)
{
/*
* Implementation of radial gradients following the PDF specification.
@@ -247,7 +258,7 @@ radial_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
gradient_t *gradient = (gradient_t *)image;
radial_gradient_t *radial = (radial_gradient_t *)image;
- uint32_t *end = buffer + width;
+ uint32_t *end = buffer + width * (Bpp / 4);
pixman_gradient_walker_t walker;
pixman_vector_t v, unit;
@@ -330,18 +341,21 @@ radial_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
{
if (!mask || *mask++)
{
- *buffer = radial_compute_color (radial->a, b, c,
- radial->inva,
- radial->delta.radius,
- radial->mindr,
- &walker,
- image->common.repeat);
+ radial_write_color (radial->a, b, c,
+ radial->inva,
+ radial->delta.radius,
+ radial->mindr,
+ &walker,
+ image->common.repeat,
+ Bpp,
+ write_pixel,
+ buffer);
}
b += db;
c += dc;
dc += ddc;
- ++buffer;
+ buffer += (Bpp / 4);
}
}
else
@@ -375,20 +389,23 @@ radial_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
pdx, pdy, radial->c1.radius);
/* / pixman_fixed_1 / pixman_fixed_1 */
- *buffer = radial_compute_color (radial->a, b, c,
- radial->inva,
- radial->delta.radius,
- radial->mindr,
- &walker,
- image->common.repeat);
+ radial_write_color (radial->a, b, c,
+ radial->inva,
+ radial->delta.radius,
+ radial->mindr,
+ &walker,
+ image->common.repeat,
+ Bpp,
+ write_pixel,
+ buffer);
}
else
{
- *buffer = 0;
+ memset (buffer, 0, Bpp);
}
}
- ++buffer;
+ buffer += (Bpp / 4);
v.vector[0] += unit.vector[0];
v.vector[1] += unit.vector[1];
@@ -401,14 +418,17 @@ radial_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
}
static uint32_t *
-radial_get_scanline_wide (pixman_iter_t *iter, const uint32_t *mask)
+radial_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
{
- uint32_t *buffer = radial_get_scanline_narrow (iter, NULL);
-
- pixman_expand_to_float (
- (argb_t *)buffer, buffer, PIXMAN_a8r8g8b8, iter->width);
+ return radial_get_scanline (iter, mask, 4,
+ _pixman_gradient_walker_write_narrow);
+}
- return buffer;
+static uint32_t *
+radial_get_scanline_wide (pixman_iter_t *iter, const uint32_t *mask)
+{
+ return radial_get_scanline (iter, NULL, 16,
+ _pixman_gradient_walker_write_wide);
}
void
@@ -422,11 +442,11 @@ _pixman_radial_gradient_iter_init (pixman_image_t *image, pixman_iter_t *iter)
PIXMAN_EXPORT pixman_image_t *
pixman_image_create_radial_gradient (const pixman_point_fixed_t * inner,
- const pixman_point_fixed_t * outer,
- pixman_fixed_t inner_radius,
- pixman_fixed_t outer_radius,
- const pixman_gradient_stop_t *stops,
- int n_stops)
+ const pixman_point_fixed_t * outer,
+ pixman_fixed_t inner_radius,
+ pixman_fixed_t outer_radius,
+ const pixman_gradient_stop_t *stops,
+ int n_stops)
{
pixman_image_t *image;
radial_gradient_t *radial;
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-24 20:59:01 +0000