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harfbuzz/test/api/test-paint.c

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/*
* Copyright © 2022 Matthias Clasen
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*/
#include "hb-test.h"
#include <hb-features.h>
#include <hb-ot.h>
#ifdef HB_HAS_FREETYPE
#include <hb-ft.h>
#if (FREETYPE_MAJOR*10000 + FREETYPE_MINOR*100 + FREETYPE_PATCH) >= 21101
#include FT_COLOR_H
#endif
static inline hb_bool_t
have_ft_colrv1 (void)
{
#if (FREETYPE_MAJOR*10000 + FREETYPE_MINOR*100 + FREETYPE_PATCH) >= 21101
// https://github.com/harfbuzz/harfbuzz/issues/4013
return sizeof (FT_ColorStop) == 2 * sizeof (FT_Fixed);
#endif
return FALSE;
}
#endif
/* Unit tests for hb-paint.h */
/* ---- */
typedef struct {
int level;
GString *string;
} paint_data_t;
static void print (paint_data_t *data, const char *format, ...) G_GNUC_PRINTF (2, 3);
static void
print (paint_data_t *data,
const char *format,
...)
{
va_list args;
g_string_append_printf (data->string, "%*s", 2 * data->level, "");
va_start (args, format);
g_string_append_vprintf (data->string, format, args);
va_end (args);
g_string_append (data->string, "\n");
}
static void
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;
print (data, "start transform %.3g %.3g %.3g %.3g %.3g %.3g", xx, yx, xy, yy, dx, dy);
data->level++;
}
static void
pop_transform (hb_paint_funcs_t *funcs,
void *paint_data,
void *user_data)
{
paint_data_t *data = paint_data;
data->level--;
print (data, "end transform");
}
static void
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;
print (data, "start clip glyph %u", glyph);
data->level++;
}
static void
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;
print (data, "start clip rectangle %.3g %.3g %.3g %.3g", xmin, ymin, xmax, ymax);
data->level++;
}
static void
pop_clip (hb_paint_funcs_t *funcs,
void *paint_data,
void *user_data)
{
paint_data_t *data = paint_data;
data->level--;
print (data, "end clip");
}
static void
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;
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));
}
static hb_bool_t
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;
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 = alloca (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;
}
static void
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;
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;
}
static void
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;
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;
}
static void
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;
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;
}
static void
push_group (hb_paint_funcs_t *funcs,
void *paint_data,
void *user_data)
{
paint_data_t *data = paint_data;
print (data, "push group");
data->level++;
}
static void
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;
data->level--;
print (data, "pop group mode %d", mode);
}
static hb_paint_funcs_t *
get_test_paint_funcs (void)
{
static hb_paint_funcs_t *funcs = NULL;
if (!funcs)
{
funcs = hb_paint_funcs_create ();
hb_paint_funcs_set_push_transform_func (funcs, push_transform, NULL, NULL);
hb_paint_funcs_set_pop_transform_func (funcs, pop_transform, NULL, NULL);
hb_paint_funcs_set_push_clip_glyph_func (funcs, push_clip_glyph, NULL, NULL);
hb_paint_funcs_set_push_clip_rectangle_func (funcs, push_clip_rectangle, NULL, NULL);
hb_paint_funcs_set_pop_clip_func (funcs, pop_clip, NULL, NULL);
hb_paint_funcs_set_push_group_func (funcs, push_group, NULL, NULL);
hb_paint_funcs_set_pop_group_func (funcs, pop_group, NULL, NULL);
hb_paint_funcs_set_color_func (funcs, paint_color, NULL, NULL);
hb_paint_funcs_set_image_func (funcs, paint_image, NULL, NULL);
hb_paint_funcs_set_linear_gradient_func (funcs, paint_linear_gradient, NULL, NULL);
hb_paint_funcs_set_radial_gradient_func (funcs, paint_radial_gradient, NULL, NULL);
hb_paint_funcs_set_sweep_gradient_func (funcs, paint_sweep_gradient, NULL, NULL);
hb_paint_funcs_make_immutable (funcs);
}
return funcs;
}
typedef struct {
const char *font_file;
float slant;
hb_codepoint_t glyph;
unsigned int palette;
const char *output;
} paint_test_t;
#define NOTO_HAND "fonts/noto_handwriting-cff2_colr_1.otf"
#define TEST_GLYPHS "fonts/test_glyphs-glyf_colr_1.ttf"
#define TEST_GLYPHS_VF "fonts/test_glyphs-glyf_colr_1_variable.ttf"
#define BAD_COLRV1 "fonts/bad_colrv1.ttf"
#define ROCHER_ABC "fonts/RocherColorGX.abc.ttf"
/* To verify the rendering visually, use
*
* hb-view --font-slant SLANT --font-palette PALETTE FONT --glyphs [gidGID=0+1000]
*
* where GID is the glyph value of the test.
*/
static paint_test_t paint_tests[] = {
/* COLRv1 */
{ NOTO_HAND, 0., 10, 0, "hand-10" },
{ NOTO_HAND, 0.2f,10, 0, "hand-10.2" },
{ TEST_GLYPHS, 0, 6, 0, "test-6" }, // linear gradient
{ TEST_GLYPHS, 0, 10, 0, "test-10" }, // sweep gradient
{ TEST_GLYPHS, 0, 92, 0, "test-92" }, // radial gradient
{ TEST_GLYPHS, 0, 106, 0, "test-106" },
{ TEST_GLYPHS, 0, 116, 0, "test-116" }, // compositing
{ TEST_GLYPHS, 0, 123, 0, "test-123" },
{ TEST_GLYPHS, 0, 154, 0, "test-154" },
{ TEST_GLYPHS, 0, 165, 0, "test-165" }, // linear gradient
{ TEST_GLYPHS, 0, 175, 0, "test-175" }, // layers
{ TEST_GLYPHS_VF, 0, 6, 0, "testvf-6" },
{ TEST_GLYPHS_VF, 0, 10, 0, "testvf-10" },
{ TEST_GLYPHS_VF, 0, 92, 0, "testvf-92" },
{ TEST_GLYPHS_VF, 0, 106, 0, "testvf-106" },
{ TEST_GLYPHS_VF, 0, 116, 0, "testvf-116" },
{ TEST_GLYPHS_VF, 0, 123, 0, "testvf-123" },
{ TEST_GLYPHS_VF, 0, 154, 0, "testvf-154" },
{ TEST_GLYPHS_VF, 0, 165, 0, "testvf-165" },
{ TEST_GLYPHS_VF, 0, 175, 0, "testvf-175" },
{ BAD_COLRV1, 0, 154, 0, "bad-154" }, // recursion
/* COLRv0 */
{ ROCHER_ABC, 0.3f, 1, 0, "rocher-1" },
{ ROCHER_ABC, 0.3f, 2, 2, "rocher-2" },
{ ROCHER_ABC, 0, 3, 200, "rocher-3" },
};
static void
test_hb_paint (gconstpointer d,
hb_bool_t use_ft)
{
const paint_test_t *test = d;
hb_face_t *face;
hb_font_t *font;
hb_paint_funcs_t *funcs;
paint_data_t data;
char *file;
char *buffer;
gsize len;
GError *error = NULL;
face = hb_test_open_font_file (test->font_file);
font = hb_font_create (face);
hb_font_set_synthetic_slant (font, test->slant);
#ifdef HB_HAS_FREETYPE
if (use_ft)
hb_ft_font_set_funcs (font);
#endif
funcs = get_test_paint_funcs ();
data.string = g_string_new ("");
data.level = 0;
hb_font_paint_glyph (font, test->glyph, funcs, &data, 0, HB_COLOR (0, 0, 0, 255));
/* Run
*
* GENERATE_DATA=1 G_TEST_SRCDIR=./test/api ./build/test/api/test-ot-color -p TESTCASE > test/api/results/OUTPUT
*
* to produce the expected results file.
*/
if (getenv ("GENERATE_DATA"))
{
g_print ("%s", data.string->str);
exit (0);
}
file = g_test_build_filename (G_TEST_DIST, "results", test->output, NULL);
if (!g_file_get_contents (file, &buffer, &len, &error))
{
g_test_message ("File %s not found.", file);
g_test_fail ();
return;
}
char **lines = g_strsplit (data.string->str, "\n", 0);
char **expected;
if (strstr (buffer, "\r\n"))
expected = g_strsplit (buffer, "\r\n", 0);
else
expected = g_strsplit (buffer, "\n", 0);
/* Strip initial comments */
int i;
for (i = 0; expected[i]; i++)
{
if (expected[i][0] != '#')
{
if (i > 0)
{
char **tmp = g_strdupv (expected + i);
g_strfreev (expected);
expected = tmp;
}
break;
}
}
if (g_strv_length (lines) != g_strv_length (expected))
{
g_test_message ("Unexpected number of lines in output (%d instead of %d):\n%s", g_strv_length (lines), g_strv_length (expected), data.string->str);
g_test_fail ();
}
else
{
unsigned int length = g_strv_length (lines);
for (unsigned int i = 0; i < length; i++)
{
if (strcmp (lines[i], expected[i]) != 0)
{
int pos;
for (pos = 0; lines[i][pos]; pos++)
if (lines[i][pos] != expected[i][pos])
break;
g_test_message ("Unexpected output at %d:%d (%c instead of %c):\n%s", i, pos, lines[i][pos], expected[i][pos], data.string->str);
g_test_fail ();
}
}
}
g_strfreev (lines);
g_strfreev (expected);
g_free (buffer);
g_free (file);
g_string_free (data.string, TRUE);
hb_font_destroy (font);
hb_face_destroy (face);
}
static void
test_compare_ot_ft (const char *file, hb_codepoint_t glyph)
{
hb_face_t *face;
hb_font_t *font;
hb_paint_funcs_t *funcs;
GString *ot_str;
paint_data_t data;
face = hb_test_open_font_file (file);
font = hb_font_create (face);
funcs = get_test_paint_funcs ();
data.string = g_string_new ("");
data.level = 0;
hb_font_paint_glyph (font, glyph, funcs, &data, 0, HB_COLOR (0, 0, 0, 255));
g_assert_true (data.level == 0);
ot_str = data.string;
#ifdef HB_HAS_FREETYPE
hb_ft_font_set_funcs (font);
#endif
data.string = g_string_new ("");
data.level = 0;
hb_font_paint_glyph (font, glyph, funcs, &data, 0, HB_COLOR (0, 0, 0, 255));
g_assert_true (data.level == 0);
g_assert_cmpstr (ot_str->str, ==, data.string->str);
g_string_free (data.string, TRUE);
hb_font_destroy (font);
hb_face_destroy (face);
g_string_free (ot_str, TRUE);
}
static void
test_hb_paint_ot (gconstpointer data)
{
test_hb_paint (data, 0);
}
static void
test_hb_paint_ft (gconstpointer data)
{
if (have_ft_colrv1 ())
test_hb_paint (data, 1);
else
g_test_skip ("FreeType COLRv1 support not present");
}
static void
test_compare_ot_ft_novf (gconstpointer d)
{
if (have_ft_colrv1 ())
test_compare_ot_ft (TEST_GLYPHS, GPOINTER_TO_UINT (d));
else
g_test_skip ("FreeType COLRv1 support not present");
}
static void
test_compare_ot_ft_vf (gconstpointer d)
{
if (have_ft_colrv1 ())
test_compare_ot_ft (TEST_GLYPHS_VF, GPOINTER_TO_UINT (d));
else
g_test_skip ("FreeType COLRv1 support not present");
}
static void
scrutinize_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)
{
hb_bool_t *result = paint_data;
hb_color_stop_t *stops;
unsigned int len;
hb_color_stop_t *stops2;
unsigned int len2;
*result = FALSE;
len = hb_color_line_get_color_stops (color_line, 0, NULL, NULL);
if (len == 0)
return;
stops = malloc (len * sizeof (hb_color_stop_t));
stops2 = 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, stops2);
// check that we can get stops twice
if (memcmp (stops, stops2, len * sizeof (hb_color_stop_t)) != 0)
{
free (stops);
free (stops2);
return;
}
// check that we can get a single stop in the middle
len2 = 1;
hb_color_line_get_color_stops (color_line, len - 1, &len2, stops2);
if (memcmp (&stops[len - 1], stops2, sizeof (hb_color_stop_t)) != 0)
{
free (stops);
free (stops2);
return;
}
free (stops);
free (stops2);
*result = TRUE;
}
static void
test_color_stops (hb_bool_t use_ft)
{
hb_face_t *face;
hb_font_t *font;
hb_paint_funcs_t *funcs;
hb_bool_t result = FALSE;
face = hb_test_open_font_file (NOTO_HAND);
font = hb_font_create (face);
#ifdef HB_HAS_FREETYPE
if (use_ft)
hb_ft_font_set_funcs (font);
#endif
funcs = hb_paint_funcs_create ();
hb_paint_funcs_set_linear_gradient_func (funcs, scrutinize_linear_gradient, NULL, NULL);
hb_font_paint_glyph (font, 10, funcs, &result, 0, HB_COLOR (0, 0, 0, 255));
g_assert_true (result);
hb_paint_funcs_destroy (funcs);
hb_font_destroy (font);
hb_face_destroy (face);
}
static void
test_color_stops_ot (void)
{
test_color_stops (0);
}
static void
test_color_stops_ft (void)
{
if (have_ft_colrv1 ())
test_color_stops (1);
else
g_test_skip ("FreeType COLRv1 support not present");
}
int
main (int argc, char **argv)
{
int status = 0;
hb_test_init (&argc, &argv);
for (unsigned int i = 0; i < G_N_ELEMENTS (paint_tests); i++)
{
hb_test_add_data_flavor (&paint_tests[i], paint_tests[i].output, test_hb_paint_ot);
hb_test_add_data_flavor (&paint_tests[i], paint_tests[i].output, test_hb_paint_ft);
}
hb_face_t *face = hb_test_open_font_file (TEST_GLYPHS);
unsigned glyph_count = hb_face_get_glyph_count (face);
for (unsigned int i = 1; i < glyph_count; i++)
{
char buf[20];
snprintf (buf, 20, "test-%u", i);
hb_test_add_data_flavor (GUINT_TO_POINTER (i), buf, test_compare_ot_ft_novf);
hb_test_add_data_flavor (GUINT_TO_POINTER (i), buf, test_compare_ot_ft_vf);
}
hb_face_destroy (face);
hb_test_add (test_color_stops_ot);
hb_test_add (test_color_stops_ft);
status = hb_test_run();
return status;
}
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