p/fiv
1
1
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Optimize thumbnail rendering

Browse Source 
Massive responsivity gains have been achieved here.

Rescaling performance doesn't seem to be particularly affected.
This commit is contained in:
Přemysl Eric Janouch 2021-12-20 04:29:19 +01:00
parent 63955e881d
commit ada67f044a
Signed by: p
GPG Key ID: A0420B94F92B9493
2 changed files with 18 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
fiv-browser.c
View File

@ -254,8 +254,12 @@ draw_row(FivBrowser *self, cairo_t *cr, const Row *row)
border.top + extents.height + border.bottom);
}
gtk_render_background(
style, cr, border.left, border.top, extents.width, extents.height);
// Performance optimization--specifically targeting the checkerboard.
if (cairo_image_surface_get_format(item->entry->thumbnail) !=
CAIRO_FORMAT_RGB24) {
gtk_render_background(style, cr, border.left, border.top,
extents.width, extents.height);
}
gtk_render_frame(style, cr, 0, 0,
border.left + extents.width + border.right,
@ -306,8 +310,9 @@ rescale_thumbnail(cairo_surface_t *thumbnail, double row_height)
int projected_width = round(scale_x * width);
int projected_height = round(scale_y * height);
cairo_format_t cairo_format = cairo_image_surface_get_format(thumbnail);
cairo_surface_t *scaled = cairo_image_surface_create(
CAIRO_FORMAT_ARGB32, projected_width, projected_height);
cairo_format, projected_width, projected_height);
// pixman can take gamma into account when scaling, unlike Cairo.
struct pixman_f_transform xform_floating;
@ -315,7 +320,8 @@ rescale_thumbnail(cairo_surface_t *thumbnail, double row_height)
// PIXMAN_a8r8g8b8_sRGB can be used for gamma-correct results,
// but it's an incredibly slow transformation
pixman_format_code_t format = PIXMAN_a8r8g8b8;
pixman_format_code_t format =
cairo_format == CAIRO_FORMAT_RGB24 ? PIXMAN_x8r8g8b8 : PIXMAN_a8r8g8b8;
pixman_image_t *src = pixman_image_create_bits(format, width, height,
(uint32_t *) cairo_image_surface_get_data(thumbnail),

13
fiv-io.c
View File

@ -2366,9 +2366,15 @@ read_spng_thumbnail(
}
struct spng_ihdr ihdr = {};
struct spng_trns trns = {};
spng_get_ihdr(ctx, &ihdr);
bool may_be_translucent = !spng_get_trns(ctx, &trns) ||
ihdr.color_type == SPNG_COLOR_TYPE_GRAYSCALE_ALPHA ||
ihdr.color_type == SPNG_COLOR_TYPE_TRUECOLOR_ALPHA;
cairo_surface_t *surface = cairo_image_surface_create(
CAIRO_FORMAT_ARGB32, ihdr.width, ihdr.height);
may_be_translucent ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24,
ihdr.width, ihdr.height);
cairo_status_t surface_status = cairo_surface_status(surface);
if (surface_status != CAIRO_STATUS_SUCCESS) {
@ -2396,10 +2402,7 @@ read_spng_thumbnail(
}
// pixman can be mildly abused to do this operation, but it won't be faster.
struct spng_trns trns = {};
if (ihdr.color_type == SPNG_COLOR_TYPE_GRAYSCALE_ALPHA ||
ihdr.color_type == SPNG_COLOR_TYPE_TRUECOLOR_ALPHA ||
!spng_get_trns(ctx, &trns)) {
if (may_be_translucent) {
for (size_t i = size / sizeof *data; i--; ) {
const uint8_t *unit = (const uint8_t *) &data[i];
uint32_t a = unit[3],