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.
This commit is contained in:
Matthias Clasen
Behdad Esfahbod
parent
583f010b05
commit
ecd7420456
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@ -37,6 +37,27 @@
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#include "hb-blob.hh"
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#include "hb-cairo-utils.h"
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static bool debug = false;
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static int level = 0;
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static void
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print (const char *format,
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...)
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{
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va_list args;
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if (!debug)
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return;
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printf ("%*s", 2 * level, "");
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va_start (args, format);
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vprintf (format, args);
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va_end (args);
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printf ("\n");
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}
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static const cairo_user_data_key_t _hb_font_cairo_user_data_key = {0};
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static void
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@ -46,6 +67,8 @@ move_to (hb_draw_funcs_t *dfuncs,
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float to_x, float to_y,
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void *)
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{
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print ("move to %f %f",
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(double) to_x, (double) to_y);
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cairo_move_to (cr,
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(double) to_x, (double) to_y);
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}
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@ -57,6 +80,8 @@ line_to (hb_draw_funcs_t *dfuncs,
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float to_x, float to_y,
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void *)
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{
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print ("line to %f %f",
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(double) to_x, (double) to_y);
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cairo_line_to (cr,
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(double) to_x, (double) to_y);
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}
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@ -70,6 +95,10 @@ cubic_to (hb_draw_funcs_t *dfuncs,
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float to_x, float to_y,
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void *)
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{
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print ("cubic to %f %f",
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(double) control1_x, (double) control1_y,
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(double) control2_x, (double) control2_y,
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(double) to_x, (double) to_y);
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cairo_curve_to (cr,
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(double) control1_x, (double) control1_y,
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(double) control2_x, (double) control2_y,
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@ -82,6 +111,7 @@ close_path (hb_draw_funcs_t *dfuncs,
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hb_draw_state_t *st,
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void *)
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{
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print ("close path");
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cairo_close_path (cr);
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}
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@ -116,6 +146,12 @@ push_transform (hb_paint_funcs_t *funcs,
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cairo_t *cr = (cairo_t *)paint_data;
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cairo_matrix_t m;
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print ("start transform %f %f %f %f %f %f",
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(double) xx, (double) yx,
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(double) xy, (double) yy,
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(double) dx, (double) dy);
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level++;
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cairo_save (cr);
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cairo_matrix_init (&m, (double) xx, (double) yx,
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(double) xy, (double) yy,
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@ -131,6 +167,9 @@ pop_transform (hb_paint_funcs_t *funcs,
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cairo_t *cr = (cairo_t *)paint_data;
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cairo_restore (cr);
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level--;
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print ("end transform");
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}
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static void
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@ -142,6 +181,9 @@ push_clip_glyph (hb_paint_funcs_t *funcs,
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{
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cairo_t *cr = (cairo_t *)paint_data;
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print ("start clip glyph %u", glyph);
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level++;
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cairo_save (cr);
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cairo_new_path (cr);
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hb_font_draw_glyph (font, glyph, get_cairo_draw_funcs (), cr);
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@ -157,6 +199,11 @@ push_clip_rectangle (hb_paint_funcs_t *funcs,
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{
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cairo_t *cr = (cairo_t *)paint_data;
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print ("start clip rectangle %f %f %f %f",
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(double) xmin, (double) ymin,
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(double) xmax, (double) ymax);
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level++;
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cairo_save (cr);
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cairo_rectangle (cr,
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(double) xmin, (double) ymin,
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@ -172,6 +219,9 @@ pop_clip (hb_paint_funcs_t *funcs,
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cairo_t *cr = (cairo_t *)paint_data;
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cairo_restore (cr);
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level--;
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print ("end clip");
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}
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static void
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@ -181,6 +231,9 @@ push_group (hb_paint_funcs_t *funcs,
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{
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cairo_t *cr = (cairo_t *)paint_data;
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print ("push group");
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level++;
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cairo_save (cr);
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cairo_push_group (cr);
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}
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@ -198,6 +251,9 @@ pop_group (hb_paint_funcs_t *funcs,
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cairo_paint (cr);
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cairo_restore (cr);
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level--;
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print ("pop group mode %d", mode);
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}
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static void
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@ -209,6 +265,13 @@ paint_color (hb_paint_funcs_t *funcs,
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{
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cairo_t *cr = (cairo_t *)paint_data;
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print ("solid (fg %d) %d %d %d %d",
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use_foreground,
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hb_color_get_red (color),
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hb_color_get_green (color),
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hb_color_get_blue (color),
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hb_color_get_alpha (color));
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cairo_set_source_rgba (cr,
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hb_color_get_red (color) / 255.,
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hb_color_get_green (color) / 255.,
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@ -230,9 +293,39 @@ paint_image (hb_paint_funcs_t *funcs,
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{
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cairo_t *cr = (cairo_t *)paint_data;
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char buf[5] = { 0, };
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hb_tag_to_string (format, buf);
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print ("image type %s size %u %u slant %f extents %d %d %d %d\n",
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buf, width, height, (double) slant,
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extents->x_bearing, extents->y_bearing, extents->width, extents->height);
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hb_cairo_paint_glyph_image (cr, blob, width, height, format, slant, extents);
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}
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static void
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print_color_line (hb_color_line_t *color_line)
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{
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hb_color_stop_t *stops;
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unsigned int len;
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len = hb_color_line_get_color_stops (color_line, 0, NULL, NULL);
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stops = (hb_color_stop_t *)alloca (len * sizeof (hb_color_stop_t));
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hb_color_line_get_color_stops (color_line, 0, &len, stops);
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print ("colors extend %d", hb_color_line_get_extend (color_line));
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level += 1;
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for (unsigned int i = 0; i < len; i++)
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print ("%f (fg %d) %d %d %d %d",
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(double) stops[i].offset,
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stops[i].is_foreground,
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hb_color_get_red (stops[i].color),
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hb_color_get_green (stops[i].color),
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hb_color_get_blue (stops[i].color),
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hb_color_get_alpha (stops[i].color));
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level -= 1;
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}
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static void
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paint_linear_gradient (hb_paint_funcs_t *funcs,
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void *paint_data,
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@ -244,6 +337,15 @@ paint_linear_gradient (hb_paint_funcs_t *funcs,
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{
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cairo_t *cr = (cairo_t *)paint_data;
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print ("linear gradient");
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level += 1;
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print ("p0 %f %f", (double) x0, (double) y0);
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print ("p1 %f %f", (double) x1, (double) y1);
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print ("p2 %f %f", (double) x2, (double) y2);
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print_color_line (color_line);
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level -= 1;
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hb_cairo_paint_linear_gradient (cr, color_line, x0, y0, x1, y1, x2, y2);
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}
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@ -257,6 +359,14 @@ paint_radial_gradient (hb_paint_funcs_t *funcs,
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{
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cairo_t *cr = (cairo_t *)paint_data;
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print ("radial gradient");
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level += 1;
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print ("p0 %f %f radius %f", (double) x0, (double) y0, (double) r0);
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print ("p1 %f %f radius %f", (double) x1, (double) y1, (double) r1);
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print_color_line (color_line);
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level -= 1;
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hb_cairo_paint_radial_gradient (cr, color_line, x0, y0, r0, x1, y1, r1);
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}
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@ -270,6 +380,14 @@ paint_sweep_gradient (hb_paint_funcs_t *funcs,
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{
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cairo_t *cr = (cairo_t *)paint_data;
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print ("sweep gradient");
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level++;
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print ("center %f %f", (double) x0, (double) y0);
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print ("angles %f %f", (double) start_angle, (double) end_angle);
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print_color_line (color_line);
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level--;
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hb_cairo_paint_sweep_gradient (cr, color_line, x0, y0, start_angle, end_angle);
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}
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@ -366,6 +484,9 @@ render_color_glyph (cairo_scaled_font_t *scaled_font,
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hb_font_get_scale (font, &x_scale, &y_scale);
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cairo_scale (cr, +1./x_scale, -1./y_scale);
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if (getenv ("HB_PAINT_DEBUG"))
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debug = atoi (getenv ("HB_PAINT_DEBUG"));
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hb_font_paint_glyph (font, glyph, get_cairo_paint_funcs (), cr, palette, color);
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hb_glyph_extents_t hb_extents;
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