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Test PaintFuncs
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Test fonts and expected results are taking verbatim from HarfBuzz tests.
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@khaledhosny
khaledhosny committed Jan 27, 2024
1 parent 225fffa commit 500c5f2
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277 changes: 277 additions & 0 deletions src/uharfbuzz/_draw_test_funcs.cc
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Original file line number Diff line number Diff line change
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#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>

#include "hb.h"

#if defined (_MSC_VER)
#define EXTERN __declspec (dllexport) extern
Expand Down Expand Up @@ -68,4 +72,277 @@ _test_cubic_to (void *dfuncs,
sprintf (draw_data + strlen (draw_data), "C%g,%g %g,%g %g,%g", c1_x, c1_y, c2_x, c2_y, to_x, to_y);
}

typedef struct {
int level;
char *string;
} paint_data_t;

EXTERN void*
_test_paint_data_create (size_t size)
{
paint_data_t *data = (paint_data_t *)calloc (1, sizeof (paint_data_t));
data->string = (char *)calloc (size, sizeof (char));
return data;
}

EXTERN void
_test_paint_data_destroy (void *paint_data)
{
paint_data_t *data = (paint_data_t *)paint_data;
free (data->string);
free (data);
}

EXTERN char *
_test_paint_data_get_string (void *paint_data)
{
paint_data_t *data = (paint_data_t *)paint_data;
return data->string;
}

static void
print (paint_data_t *data,
const char *format,
...)
{
va_list args;

sprintf (data->string + strlen (data->string), "%*s", 2 * data->level, "");

va_start (args, format);
vsprintf (data->string + strlen (data->string), format, args);
va_end (args);

sprintf (data->string + strlen (data->string), "\n");
}

EXTERN void
_test_push_transform (hb_paint_funcs_t *funcs,
void *paint_data,
float xx, float yx,
float xy, float yy,
float dx, float dy,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;

print (data, "start transform %.3g %.3g %.3g %.3g %.3g %.3g", xx, yx, xy, yy, dx, dy);
data->level++;
}

EXTERN void
_test_pop_transform (hb_paint_funcs_t *funcs,
void *paint_data,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;

data->level--;
print (data, "end transform");
}

EXTERN hb_bool_t
_test_paint_color_glyph (hb_paint_funcs_t *funcs,
void *paint_data,
hb_codepoint_t glyph,
hb_font_t *font,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;

print (data, "paint color glyph %u; acting as failed", glyph);

return false;
}

EXTERN void
_test_push_clip_glyph (hb_paint_funcs_t *funcs,
void *paint_data,
hb_codepoint_t glyph,
hb_font_t *font,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;

print (data, "start clip glyph %u", glyph);
data->level++;
}

EXTERN void
_test_push_clip_rectangle (hb_paint_funcs_t *funcs,
void *paint_data,
float xmin, float ymin, float xmax, float ymax,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;

print (data, "start clip rectangle %.3g %.3g %.3g %.3g", xmin, ymin, xmax, ymax);
data->level++;
}

EXTERN void
_test_pop_clip (hb_paint_funcs_t *funcs,
void *paint_data,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;

data->level--;
print (data, "end clip");
}

EXTERN void
_test_paint_color (hb_paint_funcs_t *funcs,
void *paint_data,
hb_bool_t use_foreground,
hb_color_t color,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;

print (data, "solid %d %d %d %d",
hb_color_get_red (color),
hb_color_get_green (color),
hb_color_get_blue (color),
hb_color_get_alpha (color));
}

EXTERN hb_bool_t
_test_paint_image (hb_paint_funcs_t *funcs,
void *paint_data,
hb_blob_t *blob,
unsigned int width,
unsigned int height,
hb_tag_t format,
float slant,
hb_glyph_extents_t *extents,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;
char buf[5] = { 0, };

hb_tag_to_string (format, buf);
print (data, "image type %s size %u %u slant %.3g extents %d %d %d %d\n",
buf, width, height, slant,
extents->x_bearing, extents->y_bearing, extents->width, extents->height);

return true;
}

static void
print_color_line (paint_data_t *data,
hb_color_line_t *color_line)
{
hb_color_stop_t *stops;
unsigned int len;

len = hb_color_line_get_color_stops (color_line, 0, NULL, NULL);
stops = (hb_color_stop_t *)malloc (len * sizeof (hb_color_stop_t));
hb_color_line_get_color_stops (color_line, 0, &len, stops);

print (data, "colors %d", hb_color_line_get_extend (color_line));
data->level += 1;
for (unsigned int i = 0; i < len; i++)
print (data, "%.3g %d %d %d %d",
stops[i].offset,
hb_color_get_red (stops[i].color),
hb_color_get_green (stops[i].color),
hb_color_get_blue (stops[i].color),
hb_color_get_alpha (stops[i].color));
data->level -= 1;

free (stops);
}

EXTERN void
_test_paint_linear_gradient (hb_paint_funcs_t *funcs,
void *paint_data,
hb_color_line_t *color_line,
float x0, float y0,
float x1, float y1,
float x2, float y2,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;

print (data, "linear gradient");
data->level += 1;
print (data, "p0 %.3g %.3g", x0, y0);
print (data, "p1 %.3g %.3g", x1, y1);
print (data, "p2 %.3g %.3g", x2, y2);

print_color_line (data, color_line);
data->level -= 1;
}

EXTERN void
_test_paint_radial_gradient (hb_paint_funcs_t *funcs,
void *paint_data,
hb_color_line_t *color_line,
float x0, float y0, float r0,
float x1, float y1, float r1,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;

print (data, "radial gradient");
data->level += 1;
print (data, "p0 %.3g %.3g radius %.3g", x0, y0, r0);
print (data, "p1 %.3g %.3g radius %.3g", x1, y1, r1);

print_color_line (data, color_line);
data->level -= 1;
}

EXTERN void
_test_paint_sweep_gradient (hb_paint_funcs_t *funcs,
void *paint_data,
hb_color_line_t *color_line,
float cx, float cy,
float start_angle,
float end_angle,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;

print (data, "sweep gradient");
data->level++;
print (data, "center %.3g %.3g", cx, cy);
print (data, "angles %.3g %.3g", start_angle, end_angle);

print_color_line (data, color_line);
data->level -= 1;
}

EXTERN void
_test_push_group (hb_paint_funcs_t *funcs,
void *paint_data,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;
print (data, "push group");
data->level++;
}

EXTERN void
_test_pop_group (hb_paint_funcs_t *funcs,
void *paint_data,
hb_paint_composite_mode_t mode,
void *user_data)
{
paint_data_t *data = (paint_data_t *)paint_data;
data->level--;
print (data, "pop group mode %d", mode);
}

EXTERN hb_bool_t
_test_custom_palette_color(hb_paint_funcs_t *funcs,
void *paint_data,
unsigned int color_index,
hb_color_t *color,
void *user_data)
{
return false;
}

}
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