From ecd7420456619dcfffd51b943468ed828c07d5a1 Mon Sep 17 00:00:00 2001 From: Matthias Clasen Date: Fri, 23 Dec 2022 13:32:31 -0500 Subject: [PATCH] Debug spew To get a dump of the hb-paint callbacks, set HB_PAINT_DEBUG=1 when running hb-view. For now, leave this code in place, since it comes in handy for various debugging. --- util/helper-cairo-user.hh | 131 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 126 insertions(+), 5 deletions(-) diff --git a/util/helper-cairo-user.hh b/util/helper-cairo-user.hh index 2784b39bb..03dbb8727 100644 --- a/util/helper-cairo-user.hh +++ b/util/helper-cairo-user.hh @@ -37,6 +37,27 @@ #include "hb-blob.hh" #include "hb-cairo-utils.h" +static bool debug = false; +static int level = 0; + +static void +print (const char *format, + ...) +{ + va_list args; + + if (!debug) + return; + + printf ("%*s", 2 * level, ""); + + va_start (args, format); + vprintf (format, args); + va_end (args); + + printf ("\n"); +} + static const cairo_user_data_key_t _hb_font_cairo_user_data_key = {0}; static void @@ -46,6 +67,8 @@ move_to (hb_draw_funcs_t *dfuncs, float to_x, float to_y, void *) { + print ("move to %f %f", + (double) to_x, (double) to_y); cairo_move_to (cr, (double) to_x, (double) to_y); } @@ -57,6 +80,8 @@ line_to (hb_draw_funcs_t *dfuncs, float to_x, float to_y, void *) { + print ("line to %f %f", + (double) to_x, (double) to_y); cairo_line_to (cr, (double) to_x, (double) to_y); } @@ -70,6 +95,10 @@ cubic_to (hb_draw_funcs_t *dfuncs, float to_x, float to_y, void *) { + print ("cubic to %f %f", + (double) control1_x, (double) control1_y, + (double) control2_x, (double) control2_y, + (double) to_x, (double) to_y); cairo_curve_to (cr, (double) control1_x, (double) control1_y, (double) control2_x, (double) control2_y, @@ -82,6 +111,7 @@ close_path (hb_draw_funcs_t *dfuncs, hb_draw_state_t *st, void *) { + print ("close path"); cairo_close_path (cr); } @@ -116,10 +146,16 @@ push_transform (hb_paint_funcs_t *funcs, cairo_t *cr = (cairo_t *)paint_data; cairo_matrix_t m; + print ("start transform %f %f %f %f %f %f", + (double) xx, (double) yx, + (double) xy, (double) yy, + (double) dx, (double) dy); + level++; + cairo_save (cr); - cairo_matrix_init (&m, (double)xx, (double)yx, - (double)xy, (double)yy, - (double)dx, (double)dy); + cairo_matrix_init (&m, (double) xx, (double) yx, + (double) xy, (double) yy, + (double) dx, (double) dy); cairo_transform (cr, &m); } @@ -131,6 +167,9 @@ pop_transform (hb_paint_funcs_t *funcs, cairo_t *cr = (cairo_t *)paint_data; cairo_restore (cr); + + level--; + print ("end transform"); } static void @@ -142,6 +181,9 @@ push_clip_glyph (hb_paint_funcs_t *funcs, { cairo_t *cr = (cairo_t *)paint_data; + print ("start clip glyph %u", glyph); + level++; + cairo_save (cr); cairo_new_path (cr); hb_font_draw_glyph (font, glyph, get_cairo_draw_funcs (), cr); @@ -157,10 +199,15 @@ push_clip_rectangle (hb_paint_funcs_t *funcs, { cairo_t *cr = (cairo_t *)paint_data; + print ("start clip rectangle %f %f %f %f", + (double) xmin, (double) ymin, + (double) xmax, (double) ymax); + level++; + cairo_save (cr); cairo_rectangle (cr, - (double)xmin, (double)ymin, - (double)(xmax - xmin), (double)(ymax - ymin)); + (double) xmin, (double) ymin, + (double) (xmax - xmin), (double) (ymax - ymin)); cairo_clip (cr); } @@ -172,6 +219,9 @@ pop_clip (hb_paint_funcs_t *funcs, cairo_t *cr = (cairo_t *)paint_data; cairo_restore (cr); + + level--; + print ("end clip"); } static void @@ -181,6 +231,9 @@ push_group (hb_paint_funcs_t *funcs, { cairo_t *cr = (cairo_t *)paint_data; + print ("push group"); + level++; + cairo_save (cr); cairo_push_group (cr); } @@ -198,6 +251,9 @@ pop_group (hb_paint_funcs_t *funcs, cairo_paint (cr); cairo_restore (cr); + + level--; + print ("pop group mode %d", mode); } static void @@ -209,6 +265,13 @@ paint_color (hb_paint_funcs_t *funcs, { cairo_t *cr = (cairo_t *)paint_data; + print ("solid (fg %d) %d %d %d %d", + use_foreground, + hb_color_get_red (color), + hb_color_get_green (color), + hb_color_get_blue (color), + hb_color_get_alpha (color)); + cairo_set_source_rgba (cr, hb_color_get_red (color) / 255., hb_color_get_green (color) / 255., @@ -230,9 +293,39 @@ paint_image (hb_paint_funcs_t *funcs, { cairo_t *cr = (cairo_t *)paint_data; + char buf[5] = { 0, }; + + hb_tag_to_string (format, buf); + print ("image type %s size %u %u slant %f extents %d %d %d %d\n", + buf, width, height, (double) slant, + extents->x_bearing, extents->y_bearing, extents->width, extents->height); + hb_cairo_paint_glyph_image (cr, blob, width, height, format, slant, extents); } +static void +print_color_line (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 *)alloca (len * sizeof (hb_color_stop_t)); + hb_color_line_get_color_stops (color_line, 0, &len, stops); + + print ("colors extend %d", hb_color_line_get_extend (color_line)); + level += 1; + for (unsigned int i = 0; i < len; i++) + print ("%f (fg %d) %d %d %d %d", + (double) stops[i].offset, + stops[i].is_foreground, + 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)); + level -= 1; +} + static void paint_linear_gradient (hb_paint_funcs_t *funcs, void *paint_data, @@ -244,6 +337,15 @@ paint_linear_gradient (hb_paint_funcs_t *funcs, { cairo_t *cr = (cairo_t *)paint_data; + print ("linear gradient"); + level += 1; + print ("p0 %f %f", (double) x0, (double) y0); + print ("p1 %f %f", (double) x1, (double) y1); + print ("p2 %f %f", (double) x2, (double) y2); + + print_color_line (color_line); + level -= 1; + hb_cairo_paint_linear_gradient (cr, color_line, x0, y0, x1, y1, x2, y2); } @@ -257,6 +359,14 @@ paint_radial_gradient (hb_paint_funcs_t *funcs, { cairo_t *cr = (cairo_t *)paint_data; + print ("radial gradient"); + level += 1; + print ("p0 %f %f radius %f", (double) x0, (double) y0, (double) r0); + print ("p1 %f %f radius %f", (double) x1, (double) y1, (double) r1); + + print_color_line (color_line); + level -= 1; + hb_cairo_paint_radial_gradient (cr, color_line, x0, y0, r0, x1, y1, r1); } @@ -270,6 +380,14 @@ paint_sweep_gradient (hb_paint_funcs_t *funcs, { cairo_t *cr = (cairo_t *)paint_data; + print ("sweep gradient"); + level++; + print ("center %f %f", (double) x0, (double) y0); + print ("angles %f %f", (double) start_angle, (double) end_angle); + + print_color_line (color_line); + level--; + hb_cairo_paint_sweep_gradient (cr, color_line, x0, y0, start_angle, end_angle); } @@ -366,6 +484,9 @@ render_color_glyph (cairo_scaled_font_t *scaled_font, hb_font_get_scale (font, &x_scale, &y_scale); cairo_scale (cr, +1./x_scale, -1./y_scale); + if (getenv ("HB_PAINT_DEBUG")) + debug = atoi (getenv ("HB_PAINT_DEBUG")); + hb_font_paint_glyph (font, glyph, get_cairo_paint_funcs (), cr, palette, color); hb_glyph_extents_t hb_extents;