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ngl: Speed up glyph loop

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Move some work out of the loop in visit_text_node.
This takes advantage of the fact that the yoffset
of most glyphs is zero, so yphase generally does
not change in a line of text.
This commit is contained in:
Matthias Clasen 2021-03-28 20:20:50 -04:00
parent d4ea2e848d
commit 3add99a9a8
2 changed files with 47 additions and 28 deletions
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21
gsk/ngl/gsknglglyphlibraryprivate.h
View File

@ -68,24 +68,7 @@ gboolean gsk_ngl_glyph_library_add (GskNglGlyphLibrary *self,
GskNglGlyphKey *key,
const GskNglGlyphValue **out_value);
static inline int
gsk_ngl_glyph_key_phase (float value)
{
return floorf (4 * (value + 0.125)) - 4 * floorf (value + 0.125);
}
static inline void
gsk_ngl_glyph_key_set_glyph_and_shift (GskNglGlyphKey *key,
PangoGlyph glyph,
float x,
float y)
{
key->glyph = glyph;
key->xshift = gsk_ngl_glyph_key_phase (x);
key->yshift = gsk_ngl_glyph_key_phase (y);
}
static inline gboolean
static inline guint
gsk_ngl_glyph_library_lookup_or_add (GskNglGlyphLibrary *self,
const GskNglGlyphKey *key,
const GskNglGlyphValue **out_value)
@ -112,7 +95,7 @@ gsk_ngl_glyph_library_lookup_or_add (GskNglGlyphLibrary *self,
self->front[front_index].value = *out_value;
}
return GSK_NGL_TEXTURE_ATLAS_ENTRY_TEXTURE (*out_value) != 0;
return GSK_NGL_TEXTURE_ATLAS_ENTRY_TEXTURE (*out_value);
}
G_END_DECLS

54
gsk/ngl/gsknglrenderjob.c
View File

@ -2639,6 +2639,30 @@ gsk_ngl_render_job_visit_opacity_node (GskNglRenderJob *job,
}
}
static inline int
compute_phase_and_pos (float value, float *pos)
{
float v;
*pos = floorf (value);
v = value - *pos;
if (v < 0.125)
return 0;
else if (v < 0.375)
return 1;
else if (v < 0.625)
return 2;
else if (v < 0.875)
return 3;
else
{
*pos += 1;
return 0;
}
}
static inline void
gsk_ngl_render_job_visit_text_node (GskNglRenderJob *job,
const GskRenderNode *node,
@ -2662,6 +2686,8 @@ gsk_ngl_render_job_visit_text_node (GskNglRenderJob *job,
GdkRGBA c;
const PangoGlyphInfo *gi;
guint i;
int yshift;
float ypos;
if (num_glyphs == 0)
return;
@ -2677,6 +2703,8 @@ gsk_ngl_render_job_visit_text_node (GskNglRenderJob *job,
lookup.font = (PangoFont *)font;
lookup.scale = (guint) (text_scale * 1024);
yshift = compute_phase_and_pos (y, &ypos);
gsk_ngl_render_job_begin_draw (job, CHOOSE_PROGRAM (job, coloring));
batch = gsk_ngl_command_queue_get_batch (job->command_queue);
@ -2695,20 +2723,28 @@ gsk_ngl_render_job_visit_text_node (GskNglRenderJob *job,
if G_UNLIKELY (gi->glyph == PANGO_GLYPH_EMPTY)
continue;
lookup.glyph = gi->glyph;
cx = (float)(x_position + gi->geometry.x_offset) / PANGO_SCALE;
cy = (float)(gi->geometry.y_offset) / PANGO_SCALE;
lookup.xshift = compute_phase_and_pos (x + cx, &cx);
gsk_ngl_glyph_key_set_glyph_and_shift (&lookup, gi->glyph, x + cx, y + cy);
if G_UNLIKELY (gi->geometry.y_offset != 0)
{
cy = (float)(gi->geometry.y_offset) / PANGO_SCALE;
lookup.yshift = compute_phase_and_pos (y + cy, &cy);
}
else
{
lookup.yshift = yshift;
cy = ypos;
}
if G_UNLIKELY (!gsk_ngl_glyph_library_lookup_or_add (library, &lookup, &glyph))
texture_id = gsk_ngl_glyph_library_lookup_or_add (library, &lookup, &glyph);
if G_UNLIKELY (texture_id == 0)
goto next;
texture_id = GSK_NGL_TEXTURE_ATLAS_ENTRY_TEXTURE (glyph);
if G_UNLIKELY (last_texture != texture_id)
{
g_assert (texture_id > 0);
if G_LIKELY (last_texture != 0)
{
guint vbo_offset = batch->draw.vbo_offset + batch->draw.vbo_count;
@ -2736,8 +2772,8 @@ gsk_ngl_render_job_visit_text_node (GskNglRenderJob *job,
tx2 = glyph->entry.area.x2;
ty2 = glyph->entry.area.y2;
glyph_x = floorf (x + cx + 0.125) + glyph->ink_rect.x;
glyph_y = floorf (y + cy + 0.125) + glyph->ink_rect.y;
glyph_x = cx + glyph->ink_rect.x;
glyph_y = cy + glyph->ink_rect.y;
glyph_x2 = glyph_x + glyph->ink_rect.width;
glyph_y2 = glyph_y + glyph->ink_rect.height;