Fix baseline when mixing ASCII and CJK characters

This commit is contained in:
v44r 2019-01-29 19:30:45 +01:00
parent d3c43973c8
commit 3916772cec

View File

@ -22,6 +22,7 @@ struct cairo_paint {
struct cairo_color fg;
struct cairo_color bg;
const char *font;
int32_t baseline;
struct box {
int32_t lx, rx; // left/right offset (pos.x - lx, box.w + rx)
@ -37,6 +38,7 @@ struct cairo_paint {
struct cairo_result {
uint32_t x_advance;
uint32_t height;
uint32_t baseline;
};
struct cairo_paint_result {
@ -104,10 +106,12 @@ bm_pango_get_text_extents(struct cairo *cairo, struct cairo_paint *paint, struct
PangoRectangle rect;
PangoLayout *layout = bm_pango_get_layout(cairo, paint, buffer);
pango_layout_get_pixel_extents(layout, NULL, &rect);
int baseline = pango_layout_get_baseline(layout) / PANGO_SCALE;
g_object_unref(layout);
result->x_advance = rect.x + rect.width;
result->height = rect.height;
result->baseline = baseline;
return true;
}
@ -131,6 +135,7 @@ bm_cairo_draw_line(struct cairo *cairo, struct cairo_paint *paint, struct cairo_
int width, height;
pango_layout_get_pixel_size(layout, &width, &height);
height = paint->box.h > 0 ? paint->box.h : height;
int base = pango_layout_get_baseline(layout) / PANGO_SCALE;
cairo_set_source_rgba(cairo->cr, paint->bg.r, paint->bg.b, paint->bg.g, paint->bg.a);
cairo_rectangle(cairo->cr,
@ -140,7 +145,7 @@ bm_cairo_draw_line(struct cairo *cairo, struct cairo_paint *paint, struct cairo_
cairo_fill(cairo->cr);
cairo_set_source_rgba(cairo->cr, paint->fg.r, paint->fg.b, paint->fg.g, paint->fg.a);
cairo_move_to(cairo->cr, paint->box.lx + paint->pos.x, paint->pos.y);
cairo_move_to(cairo->cr, paint->box.lx + paint->pos.x, paint->pos.y - base + paint->baseline);
pango_cairo_show_layout(cairo->cr, layout);
g_object_unref(layout);
@ -182,6 +187,7 @@ bm_cairo_paint(struct cairo *cairo, uint32_t width, uint32_t height, uint32_t ma
bm_pango_get_text_extents(cairo, &paint, &result, "!\"#$%%&'()*+,-./0123456789:;<=>?@ABCD"
"EFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~");
ascii_height = result.height;
paint.baseline = result.baseline;
memset(&result, 0, sizeof(result));
uint32_t title_x = 0;