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[cairo] More namespacing

This commit is contained in:
Behdad Esfahbod 2022-12-26 16:52:13 -07:00
parent 84d1b00cd4
commit 21573265e9
1 changed files with 98 additions and 98 deletions
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196
src/hb-cairo-utils.cc
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@ -200,11 +200,11 @@ hb_cairo_paint_glyph_image (cairo_t *cr,
} }
static void static void
reduce_anchors (float x0, float y0, _hb_cairo_reduce_anchors (float x0, float y0,
float x1, float y1, float x1, float y1,
float x2, float y2, float x2, float y2,
float *xx0, float *yy0, float *xx0, float *yy0,
float *xx1, float *yy1) float *xx1, float *yy1)
{ {
float q1x, q1y, q2x, q2y; float q1x, q1y, q2x, q2y;
float s; float s;
@ -231,8 +231,8 @@ reduce_anchors (float x0, float y0,
} }
static int static int
cmp_color_stop (const void *p1, _hb_cairo_cmp_color_stop (const void *p1,
const void *p2) const void *p2)
{ {
const hb_color_stop_t *c1 = (const hb_color_stop_t *) p1; const hb_color_stop_t *c1 = (const hb_color_stop_t *) p1;
const hb_color_stop_t *c2 = (const hb_color_stop_t *) p2; const hb_color_stop_t *c2 = (const hb_color_stop_t *) p2;
@ -246,14 +246,14 @@ cmp_color_stop (const void *p1,
} }
static void static void
normalize_color_line (hb_color_stop_t *stops, _hb_cairo_normalize_color_line (hb_color_stop_t *stops,
unsigned int len, unsigned int len,
float *omin, float *omin,
float *omax) float *omax)
{ {
float min, max; float min, max;
qsort (stops, len, sizeof (hb_color_stop_t), cmp_color_stop); qsort (stops, len, sizeof (hb_color_stop_t), _hb_cairo_cmp_color_stop);
min = max = stops[0].offset; min = max = stops[0].offset;
for (unsigned int i = 0; i < len; i++) for (unsigned int i = 0; i < len; i++)
@ -292,8 +292,8 @@ hb_cairo_paint_linear_gradient (cairo_t *cr,
stops = (hb_color_stop_t *) malloc (len * sizeof (hb_color_stop_t)); stops = (hb_color_stop_t *) malloc (len * sizeof (hb_color_stop_t));
hb_color_line_get_color_stops (color_line, 0, &len, stops); hb_color_line_get_color_stops (color_line, 0, &len, stops);
reduce_anchors (x0, y0, x1, y1, x2, y2, &xx0, &yy0, &xx1, &yy1); _hb_cairo_reduce_anchors (x0, y0, x1, y1, x2, y2, &xx0, &yy0, &xx1, &yy1);
normalize_color_line (stops, len, &min, &max); _hb_cairo_normalize_color_line (stops, len, &min, &max);
xxx0 = xx0 + min * (xx1 - xx0); xxx0 = xx0 + min * (xx1 - xx0);
yyy0 = yy0 + min * (yy1 - yy0); yyy0 = yy0 + min * (yy1 - yy0);
@ -340,7 +340,7 @@ hb_cairo_paint_radial_gradient (cairo_t *cr,
stops = (hb_color_stop_t *) malloc (len * sizeof (hb_color_stop_t)); stops = (hb_color_stop_t *) malloc (len * sizeof (hb_color_stop_t));
hb_color_line_get_color_stops (color_line, 0, &len, stops); hb_color_line_get_color_stops (color_line, 0, &len, stops);
normalize_color_line (stops, len, &min, &max); _hb_cairo_normalize_color_line (stops, len, &min, &max);
xx0 = x0 + min * (x1 - x0); xx0 = x0 + min * (x1 - x0);
yy0 = y0 + min * (y1 - y0); yy0 = y0 + min * (y1 - y0);
@ -376,13 +376,13 @@ typedef struct {
} hb_cairo_point_t; } hb_cairo_point_t;
static inline float static inline float
interpolate (float f0, float f1, float f) _hb_cairo_interpolate (float f0, float f1, float f)
{ {
return f0 + f * (f1 - f0); return f0 + f * (f1 - f0);
} }
static inline void static inline void
premultiply (hb_cairo_color_t *c) _hb_cairo_premultiply (hb_cairo_color_t *c)
{ {
c->r *= c->a; c->r *= c->a;
c->g *= c->a; c->g *= c->a;
@ -390,7 +390,7 @@ premultiply (hb_cairo_color_t *c)
} }
static inline void static inline void
unpremultiply (hb_cairo_color_t *c) _hb_cairo_unpremultiply (hb_cairo_color_t *c)
{ {
if (c->a != 0.f) if (c->a != 0.f)
{ {
@ -401,47 +401,47 @@ unpremultiply (hb_cairo_color_t *c)
} }
static void static void
interpolate_colors (hb_cairo_color_t *c0, hb_cairo_color_t *c1, float k, hb_cairo_color_t *c) _hb_cairo_interpolate_colors (hb_cairo_color_t *c0, hb_cairo_color_t *c1, float k, hb_cairo_color_t *c)
{ {
// According to the COLR specification, gradients // According to the COLR specification, gradients
// should be interpolated in premultiplied form // should be interpolated in premultiplied form
premultiply (c0); _hb_cairo_premultiply (c0);
premultiply (c1); _hb_cairo_premultiply (c1);
c->r = c0->r + k * (c1->r - c0->r); c->r = c0->r + k * (c1->r - c0->r);
c->g = c0->g + k * (c1->g - c0->g); c->g = c0->g + k * (c1->g - c0->g);
c->b = c0->b + k * (c1->b - c0->b); c->b = c0->b + k * (c1->b - c0->b);
c->a = c0->a + k * (c1->a - c0->a); c->a = c0->a + k * (c1->a - c0->a);
unpremultiply (c); _hb_cairo_unpremultiply (c);
} }
static inline float static inline float
dot (hb_cairo_point_t p, hb_cairo_point_t q) _hb_cairo_dot (hb_cairo_point_t p, hb_cairo_point_t q)
{ {
return p.x * q.x + p.y * q.y; return p.x * q.x + p.y * q.y;
} }
static inline hb_cairo_point_t static inline hb_cairo_point_t
normalize (hb_cairo_point_t p) _hb_cairo_normalize (hb_cairo_point_t p)
{ {
float len = sqrt (dot (p, p)); float len = sqrt (_hb_cairo_dot (p, p));
return hb_cairo_point_t { p.x / len, p.y / len }; return hb_cairo_point_t { p.x / len, p.y / len };
} }
static inline hb_cairo_point_t static inline hb_cairo_point_t
sum (hb_cairo_point_t p, hb_cairo_point_t q) _hb_cairo_sum (hb_cairo_point_t p, hb_cairo_point_t q)
{ {
return hb_cairo_point_t { p.x + q.x, p.y + q.y }; return hb_cairo_point_t { p.x + q.x, p.y + q.y };
} }
static inline hb_cairo_point_t static inline hb_cairo_point_t
difference (hb_cairo_point_t p, hb_cairo_point_t q) _hb_cairo_difference (hb_cairo_point_t p, hb_cairo_point_t q)
{ {
return hb_cairo_point_t { p.x - q.x, p.y - q.y }; return hb_cairo_point_t { p.x - q.x, p.y - q.y };
} }
static inline hb_cairo_point_t static inline hb_cairo_point_t
scale (hb_cairo_point_t p, float f) _hb_cairo_scale (hb_cairo_point_t p, float f)
{ {
return hb_cairo_point_t { p.x * f, p.y * f }; return hb_cairo_point_t { p.x * f, p.y * f };
} }
@ -452,7 +452,7 @@ typedef struct {
} hb_cairo_patch_t; } hb_cairo_patch_t;
static void static void
add_patch (cairo_pattern_t *pattern, hb_cairo_point_t *center, hb_cairo_patch_t *p) _hb_cairo_add_patch (cairo_pattern_t *pattern, hb_cairo_point_t *center, hb_cairo_patch_t *p)
{ {
cairo_mesh_pattern_begin_patch (pattern); cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, center->x, center->y); cairo_mesh_pattern_move_to (pattern, center->x, center->y);
@ -488,10 +488,10 @@ add_patch (cairo_pattern_t *pattern, hb_cairo_point_t *center, hb_cairo_patch_t
#define MAX_ANGLE (M_PI / 8.) #define MAX_ANGLE (M_PI / 8.)
static void static void
add_sweep_gradient_patches1 (float cx, float cy, float radius, _hb_cairo_add_sweep_gradient_patches1 (float cx, float cy, float radius,
float a0, hb_cairo_color_t *c0, float a0, hb_cairo_color_t *c0,
float a1, hb_cairo_color_t *c1, float a1, hb_cairo_color_t *c1,
cairo_pattern_t *pattern) cairo_pattern_t *pattern)
{ {
hb_cairo_point_t center = hb_cairo_point_t { cx, cy }; hb_cairo_point_t center = hb_cairo_point_t { cx, cy };
int num_splits; int num_splits;
@ -511,25 +511,25 @@ add_sweep_gradient_patches1 (float cx, float cy, float radius,
hb_cairo_point_t C0, C1; hb_cairo_point_t C0, C1;
hb_cairo_patch_t patch; hb_cairo_patch_t patch;
angle1 = interpolate (a0, a1, k); angle1 = _hb_cairo_interpolate (a0, a1, k);
interpolate_colors (c0, c1, k, &color1); _hb_cairo_interpolate_colors (c0, c1, k, &color1);
patch.color0 = color0; patch.color0 = color0;
patch.color1 = color1; patch.color1 = color1;
p1 = hb_cairo_point_t { cosf (angle1), sinf (angle1) }; p1 = hb_cairo_point_t { cosf (angle1), sinf (angle1) };
patch.p0 = sum (center, scale (p0, radius)); patch.p0 = _hb_cairo_sum (center, _hb_cairo_scale (p0, radius));
patch.p1 = sum (center, scale (p1, radius)); patch.p1 = _hb_cairo_sum (center, _hb_cairo_scale (p1, radius));
A = normalize (sum (p0, p1)); A = _hb_cairo_normalize (_hb_cairo_sum (p0, p1));
U = hb_cairo_point_t { -A.y, A.x }; U = hb_cairo_point_t { -A.y, A.x };
C0 = sum (A, scale (U, dot (difference (p0, A), p0) / dot (U, p0))); C0 = _hb_cairo_sum (A, _hb_cairo_scale (U, _hb_cairo_dot (_hb_cairo_difference (p0, A), p0) / _hb_cairo_dot (U, p0)));
C1 = sum (A, scale (U, dot (difference (p1, A), p1) / dot (U, p1))); C1 = _hb_cairo_sum (A, _hb_cairo_scale (U, _hb_cairo_dot (_hb_cairo_difference (p1, A), p1) / _hb_cairo_dot (U, p1)));
patch.c0 = sum (center, scale (sum (C0, scale (difference (C0, p0), 0.33333)), radius)); patch.c0 = _hb_cairo_sum (center, _hb_cairo_scale (_hb_cairo_sum (C0, _hb_cairo_scale (_hb_cairo_difference (C0, p0), 0.33333)), radius));
patch.c1 = sum (center, scale (sum (C1, scale (difference (C1, p1), 0.33333)), radius)); patch.c1 = _hb_cairo_sum (center, _hb_cairo_scale (_hb_cairo_sum (C1, _hb_cairo_scale (_hb_cairo_difference (C1, p1), 0.33333)), radius));
add_patch (pattern, &center, &patch); _hb_cairo_add_patch (pattern, &center, &patch);
p0 = p1; p0 = p1;
color0 = color1; color0 = color1;
@ -537,14 +537,14 @@ add_sweep_gradient_patches1 (float cx, float cy, float radius,
} }
static void static void
add_sweep_gradient_patches (hb_color_stop_t *stops, _hb_cairo_add_sweep_gradient_patches (hb_color_stop_t *stops,
unsigned int n_stops, unsigned int n_stops,
cairo_extend_t extend, cairo_extend_t extend,
float cx, float cy, float cx, float cy,
float radius, float radius,
float start_angle, float start_angle,
float end_angle, float end_angle,
cairo_pattern_t *pattern) cairo_pattern_t *pattern)
{ {
float angles_[PREALLOCATED_COLOR_STOPS]; float angles_[PREALLOCATED_COLOR_STOPS];
float *angles = angles_; float *angles = angles_;
@ -563,10 +563,10 @@ add_sweep_gradient_patches (hb_color_stop_t *stops,
c.g = hb_color_get_green (stops[0].color) / 255.; c.g = hb_color_get_green (stops[0].color) / 255.;
c.b = hb_color_get_blue (stops[0].color) / 255.; c.b = hb_color_get_blue (stops[0].color) / 255.;
c.a = hb_color_get_alpha (stops[0].color) / 255.; c.a = hb_color_get_alpha (stops[0].color) / 255.;
add_sweep_gradient_patches1 (cx, cy, radius, _hb_cairo_add_sweep_gradient_patches1 (cx, cy, radius,
0., &c, 0., &c,
start_angle, &c, start_angle, &c,
pattern); pattern);
} }
if (end_angle < _2_M_PIf) if (end_angle < _2_M_PIf)
{ {
@ -574,10 +574,10 @@ add_sweep_gradient_patches (hb_color_stop_t *stops,
c.g = hb_color_get_green (stops[n_stops - 1].color) / 255.; c.g = hb_color_get_green (stops[n_stops - 1].color) / 255.;
c.b = hb_color_get_blue (stops[n_stops - 1].color) / 255.; c.b = hb_color_get_blue (stops[n_stops - 1].color) / 255.;
c.a = hb_color_get_alpha (stops[n_stops - 1].color) / 255.; c.a = hb_color_get_alpha (stops[n_stops - 1].color) / 255.;
add_sweep_gradient_patches1 (cx, cy, radius, _hb_cairo_add_sweep_gradient_patches1 (cx, cy, radius,
end_angle, &c, end_angle, &c,
_2_M_PIf, &c, _2_M_PIf, &c,
pattern); pattern);
} }
} }
return; return;
@ -627,7 +627,7 @@ add_sweep_gradient_patches (hb_color_stop_t *stops,
if (pos > 0) if (pos > 0)
{ {
float k = (0 - angles[pos - 1]) / (angles[pos] - angles[pos - 1]); float k = (0 - angles[pos - 1]) / (angles[pos] - angles[pos - 1]);
interpolate_colors (&colors[pos-1], &colors[pos], k, &color0); _hb_cairo_interpolate_colors (&colors[pos-1], &colors[pos], k, &color0);
} }
break; break;
} }
@ -636,35 +636,35 @@ add_sweep_gradient_patches (hb_color_stop_t *stops,
{ {
/* everything is below 0 */ /* everything is below 0 */
color0 = colors[n_stops-1]; color0 = colors[n_stops-1];
add_sweep_gradient_patches1 (cx, cy, radius, _hb_cairo_add_sweep_gradient_patches1 (cx, cy, radius,
0., &color0, 0., &color0,
_2_M_PIf, &color0, _2_M_PIf, &color0,
pattern); pattern);
goto done; goto done;
} }
add_sweep_gradient_patches1 (cx, cy, radius, _hb_cairo_add_sweep_gradient_patches1 (cx, cy, radius,
0., &color0, 0., &color0,
angles[pos], &colors[pos], angles[pos], &colors[pos],
pattern); pattern);
for (pos++; pos < n_stops; pos++) for (pos++; pos < n_stops; pos++)
{ {
if (angles[pos] <= _2_M_PIf) if (angles[pos] <= _2_M_PIf)
{ {
add_sweep_gradient_patches1 (cx, cy, radius, _hb_cairo_add_sweep_gradient_patches1 (cx, cy, radius,
angles[pos - 1], &colors[pos-1], angles[pos - 1], &colors[pos-1],
angles[pos], &colors[pos], angles[pos], &colors[pos],
pattern); pattern);
} }
else else
{ {
float k = (_2_M_PIf - angles[pos - 1]) / (angles[pos] - angles[pos - 1]); float k = (_2_M_PIf - angles[pos - 1]) / (angles[pos] - angles[pos - 1]);
interpolate_colors (&colors[pos - 1], &colors[pos], k, &color1); _hb_cairo_interpolate_colors (&colors[pos - 1], &colors[pos], k, &color1);
add_sweep_gradient_patches1 (cx, cy, radius, _hb_cairo_add_sweep_gradient_patches1 (cx, cy, radius,
angles[pos - 1], &colors[pos - 1], angles[pos - 1], &colors[pos - 1],
_2_M_PIf, &color1, _2_M_PIf, &color1,
pattern); pattern);
break; break;
} }
} }
@ -673,10 +673,10 @@ add_sweep_gradient_patches (hb_color_stop_t *stops,
{ {
/* everything is below 2*M_PI */ /* everything is below 2*M_PI */
color0 = colors[n_stops - 1]; color0 = colors[n_stops - 1];
add_sweep_gradient_patches1 (cx, cy, radius, _hb_cairo_add_sweep_gradient_patches1 (cx, cy, radius,
angles[n_stops - 1], &color0, angles[n_stops - 1], &color0,
_2_M_PIf, &color0, _2_M_PIf, &color0,
pattern); pattern);
goto done; goto done;
} }
} }
@ -752,29 +752,29 @@ add_sweep_gradient_patches (hb_color_stop_t *stops,
{ {
hb_cairo_color_t color; hb_cairo_color_t color;
float f = (0 - a0)/(a1 - a0); float f = (0 - a0)/(a1 - a0);
interpolate_colors (c0, c1, f, &color); _hb_cairo_interpolate_colors (c0, c1, f, &color);
add_sweep_gradient_patches1 (cx, cy, radius, _hb_cairo_add_sweep_gradient_patches1 (cx, cy, radius,
0, &color, 0, &color,
a1, c1, a1, c1,
pattern); pattern);
} }
else if (a1 >= _2_M_PIf) else if (a1 >= _2_M_PIf)
{ {
hb_cairo_color_t color; hb_cairo_color_t color;
float f = (_2_M_PIf - a0)/(a1 - a0); float f = (_2_M_PIf - a0)/(a1 - a0);
interpolate_colors (c0, c1, f, &color); _hb_cairo_interpolate_colors (c0, c1, f, &color);
add_sweep_gradient_patches1 (cx, cy, radius, _hb_cairo_add_sweep_gradient_patches1 (cx, cy, radius,
a0, c0, a0, c0,
_2_M_PIf, &color, _2_M_PIf, &color,
pattern); pattern);
goto done; goto done;
} }
else else
{ {
add_sweep_gradient_patches1 (cx, cy, radius, _hb_cairo_add_sweep_gradient_patches1 (cx, cy, radius,
a0, c0, a0, c0,
a1, c1, a1, c1,
pattern); pattern);
} }
} }
} }
@ -808,7 +808,7 @@ hb_cairo_paint_sweep_gradient (cairo_t *cr,
stops = (hb_color_stop_t *) malloc (len * sizeof (hb_color_stop_t)); stops = (hb_color_stop_t *) malloc (len * sizeof (hb_color_stop_t));
hb_color_line_get_color_stops (color_line, 0, &len, stops); hb_color_line_get_color_stops (color_line, 0, &len, stops);
qsort (stops, len, sizeof (hb_color_stop_t), cmp_color_stop); qsort (stops, len, sizeof (hb_color_stop_t), _hb_cairo_cmp_color_stop);
cairo_clip_extents (cr, &x1, &y1, &x2, &y2); cairo_clip_extents (cr, &x1, &y1, &x2, &y2);
max_x = (float) hb_max ((x1 - (double) cx) * (x1 - (double) cx), (x2 - (double) cx) * (x2 - (double) cx)); max_x = (float) hb_max ((x1 - (double) cx) * (x1 - (double) cx), (x2 - (double) cx) * (x2 - (double) cx));
@ -818,8 +818,8 @@ hb_cairo_paint_sweep_gradient (cairo_t *cr,
extend = hb_cairo_extend (hb_color_line_get_extend (color_line)); extend = hb_cairo_extend (hb_color_line_get_extend (color_line));
pattern = cairo_pattern_create_mesh (); pattern = cairo_pattern_create_mesh ();
add_sweep_gradient_patches (stops, len, extend, cx, cy, _hb_cairo_add_sweep_gradient_patches (stops, len, extend, cx, cy,
radius, start_angle, end_angle, pattern); radius, start_angle, end_angle, pattern);
cairo_set_source (cr, pattern); cairo_set_source (cr, pattern);
cairo_paint (cr); cairo_paint (cr);