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weston/shared/cairo-util.c
Daniel Stone c55a14206d cairo-util: Clean up more Cairo detritus; almost all of it 
Pango, Cairo, and fontconfig, all want to leave thread-global data
hanging around in order to maintain a cache. Try to clean up as much of
it as we possibly can on exit, apart from the Pango language string
which appears to be unfreeable, so has been added to LSan suppressions.

Signed-off-by: Daniel Stone <daniels@collabora.com>
2022-06-29 14:33:21 +01:00

699 lines
18 KiB
C
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/*
* Copyright © 2008 Kristian Høgsberg
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <math.h>
#include <wayland-util.h>
#include <cairo.h>
#include "cairo-util.h"
#include "shared/helpers.h"
#include "image-loader.h"
#include <libweston/config-parser.h>
#ifdef HAVE_PANGO
#include <fontconfig/fontconfig.h>
#include <pango/pangocairo.h>
#endif
void
surface_flush_device(cairo_surface_t *surface)
{
cairo_device_t *device;
device = cairo_surface_get_device(surface);
if (device)
cairo_device_flush(device);
}
static int
blur_surface(cairo_surface_t *surface, int margin)
{
int32_t width, height, stride, x, y, z, w;
uint8_t *src, *dst;
uint32_t *s, *d, a, p;
int i, j, k, size, half;
uint32_t kernel[71];
double f;
size = ARRAY_LENGTH(kernel);
width = cairo_image_surface_get_width(surface);
height = cairo_image_surface_get_height(surface);
stride = cairo_image_surface_get_stride(surface);
src = cairo_image_surface_get_data(surface);
dst = malloc(height * stride);
if (dst == NULL)
return -1;
half = size / 2;
a = 0;
for (i = 0; i < size; i++) {
f = (i - half);
kernel[i] = exp(- f * f / ARRAY_LENGTH(kernel)) * 10000;
a += kernel[i];
}
for (i = 0; i < height; i++) {
s = (uint32_t *) (src + i * stride);
d = (uint32_t *) (dst + i * stride);
for (j = 0; j < width; j++) {
if (margin < j && j < width - margin) {
d[j] = s[j];
continue;
}
x = 0;
y = 0;
z = 0;
w = 0;
for (k = 0; k < size; k++) {
if (j - half + k < 0 || j - half + k >= width)
continue;
p = s[j - half + k];
x += (p >> 24) * kernel[k];
y += ((p >> 16) & 0xff) * kernel[k];
z += ((p >> 8) & 0xff) * kernel[k];
w += (p & 0xff) * kernel[k];
}
d[j] = (x / a << 24) | (y / a << 16) | (z / a << 8) | w / a;
}
}
for (i = 0; i < height; i++) {
s = (uint32_t *) (dst + i * stride);
d = (uint32_t *) (src + i * stride);
for (j = 0; j < width; j++) {
if (margin <= i && i < height - margin) {
d[j] = s[j];
continue;
}
x = 0;
y = 0;
z = 0;
w = 0;
for (k = 0; k < size; k++) {
if (i - half + k < 0 || i - half + k >= height)
continue;
s = (uint32_t *) (dst + (i - half + k) * stride);
p = s[j];
x += (p >> 24) * kernel[k];
y += ((p >> 16) & 0xff) * kernel[k];
z += ((p >> 8) & 0xff) * kernel[k];
w += (p & 0xff) * kernel[k];
}
d[j] = (x / a << 24) | (y / a << 16) | (z / a << 8) | w / a;
}
}
free(dst);
cairo_surface_mark_dirty(surface);
return 0;
}
void
render_shadow(cairo_t *cr, cairo_surface_t *surface,
int x, int y, int width, int height, int margin, int top_margin)
{
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
int i, fx, fy, shadow_height, shadow_width;
cairo_set_source_rgba(cr, 0, 0, 0, 0.45);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
pattern = cairo_pattern_create_for_surface (surface);
cairo_pattern_set_filter(pattern, CAIRO_FILTER_NEAREST);
for (i = 0; i < 4; i++) {
/* when fy is set, then we are working with lower corners,
* when fx is set, then we are working with right corners
*
* 00 ------- 01
* | |
* | |
* 10 ------- 11
*/
fx = i & 1;
fy = i >> 1;
cairo_matrix_init_translate(&matrix,
-x + fx * (128 - width),
-y + fy * (128 - height));
cairo_pattern_set_matrix(pattern, &matrix);
shadow_width = margin;
shadow_height = fy ? margin : top_margin;
/* if the shadows together are greater than the surface, we need
* to fix it - set the shadow size to the half of
* the size of surface. Also handle the case when the size is
* not divisible by 2. In that case we need one part of the
* shadow to be one pixel greater. !fy or !fx, respectively,
* will do the work.
*/
if (height < 2 * shadow_height)
shadow_height = (height + !fy) / 2;
if (width < 2 * shadow_width)
shadow_width = (width + !fx) / 2;
cairo_reset_clip(cr);
cairo_rectangle(cr,
x + fx * (width - shadow_width),
y + fy * (height - shadow_height),
shadow_width, shadow_height);
cairo_clip (cr);
cairo_mask(cr, pattern);
}
shadow_width = width - 2 * margin;
shadow_height = top_margin;
if (height < 2 * shadow_height)
shadow_height = height / 2;
if (shadow_width > 0 && shadow_height) {
/* Top stretch */
cairo_matrix_init_translate(&matrix, 60, 0);
cairo_matrix_scale(&matrix, 8.0 / width, 1);
cairo_matrix_translate(&matrix, -x - width / 2, -y);
cairo_pattern_set_matrix(pattern, &matrix);
cairo_rectangle(cr, x + margin, y, shadow_width, shadow_height);
cairo_reset_clip(cr);
cairo_rectangle(cr,
x + margin, y,
shadow_width, shadow_height);
cairo_clip (cr);
cairo_mask(cr, pattern);
/* Bottom stretch */
cairo_matrix_translate(&matrix, 0, -height + 128);
cairo_pattern_set_matrix(pattern, &matrix);
cairo_reset_clip(cr);
cairo_rectangle(cr, x + margin, y + height - margin,
shadow_width, margin);
cairo_clip (cr);
cairo_mask(cr, pattern);
}
shadow_width = margin;
if (width < 2 * shadow_width)
shadow_width = width / 2;
shadow_height = height - margin - top_margin;
/* if height is smaller than sum of margins,
* then the shadow is already done by the corners */
if (shadow_height > 0 && shadow_width) {
/* Left stretch */
cairo_matrix_init_translate(&matrix, 0, 60);
cairo_matrix_scale(&matrix, 1, 8.0 / height);
cairo_matrix_translate(&matrix, -x, -y - height / 2);
cairo_pattern_set_matrix(pattern, &matrix);
cairo_reset_clip(cr);
cairo_rectangle(cr, x, y + top_margin,
shadow_width, shadow_height);
cairo_clip (cr);
cairo_mask(cr, pattern);
/* Right stretch */
cairo_matrix_translate(&matrix, -width + 128, 0);
cairo_pattern_set_matrix(pattern, &matrix);
cairo_rectangle(cr, x + width - shadow_width, y + top_margin,
shadow_width, shadow_height);
cairo_reset_clip(cr);
cairo_clip (cr);
cairo_mask(cr, pattern);
}
cairo_pattern_destroy(pattern);
cairo_reset_clip(cr);
}
void
tile_source(cairo_t *cr, cairo_surface_t *surface,
int x, int y, int width, int height, int margin, int top_margin)
{
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
int i, fx, fy, vmargin;
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
pattern = cairo_pattern_create_for_surface (surface);
cairo_pattern_set_filter(pattern, CAIRO_FILTER_NEAREST);
cairo_set_source(cr, pattern);
for (i = 0; i < 4; i++) {
fx = i & 1;
fy = i >> 1;
cairo_matrix_init_translate(&matrix,
-x + fx * (128 - width),
-y + fy * (128 - height));
cairo_pattern_set_matrix(pattern, &matrix);
if (fy)
vmargin = margin;
else
vmargin = top_margin;
cairo_rectangle(cr,
x + fx * (width - margin),
y + fy * (height - vmargin),
margin, vmargin);
cairo_fill(cr);
}
/* Top stretch */
cairo_matrix_init_translate(&matrix, 60, 0);
cairo_matrix_scale(&matrix, 8.0 / (width - 2 * margin), 1);
cairo_matrix_translate(&matrix, -x - width / 2, -y);
cairo_pattern_set_matrix(pattern, &matrix);
cairo_rectangle(cr, x + margin, y, width - 2 * margin, top_margin);
cairo_fill(cr);
/* Bottom stretch */
cairo_matrix_translate(&matrix, 0, -height + 128);
cairo_pattern_set_matrix(pattern, &matrix);
cairo_rectangle(cr, x + margin, y + height - margin,
width - 2 * margin, margin);
cairo_fill(cr);
/* Left stretch */
cairo_matrix_init_translate(&matrix, 0, 60);
cairo_matrix_scale(&matrix, 1, 8.0 / (height - margin - top_margin));
cairo_matrix_translate(&matrix, -x, -y - height / 2);
cairo_pattern_set_matrix(pattern, &matrix);
cairo_rectangle(cr, x, y + top_margin,
margin, height - margin - top_margin);
cairo_fill(cr);
/* Right stretch */
cairo_matrix_translate(&matrix, -width + 128, 0);
cairo_pattern_set_matrix(pattern, &matrix);
cairo_rectangle(cr, x + width - margin, y + top_margin,
margin, height - margin - top_margin);
cairo_fill(cr);
cairo_pattern_destroy(pattern);
cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
}
void
rounded_rect(cairo_t *cr, int x0, int y0, int x1, int y1, int radius)
{
cairo_move_to(cr, x0, y0 + radius);
cairo_arc(cr, x0 + radius, y0 + radius, radius, M_PI, 3 * M_PI / 2);
cairo_line_to(cr, x1 - radius, y0);
cairo_arc(cr, x1 - radius, y0 + radius, radius, 3 * M_PI / 2, 2 * M_PI);
cairo_line_to(cr, x1, y1 - radius);
cairo_arc(cr, x1 - radius, y1 - radius, radius, 0, M_PI / 2);
cairo_line_to(cr, x0 + radius, y1);
cairo_arc(cr, x0 + radius, y1 - radius, radius, M_PI / 2, M_PI);
cairo_close_path(cr);
}
static void
loaded_cairo_surface_destructor(void *data)
{
pixman_image_t *image = data;
pixman_image_unref(image);
}
static const cairo_user_data_key_t weston_cairo_util_load_cairo_surface_key;
cairo_surface_t *
load_cairo_surface(const char *filename)
{
cairo_surface_t *surface;
cairo_status_t ret;
pixman_image_t *image;
int width, height, stride;
void *data;
image = load_image(filename);
if (image == NULL) {
return NULL;
}
data = pixman_image_get_data(image);
width = pixman_image_get_width(image);
height = pixman_image_get_height(image);
stride = pixman_image_get_stride(image);
surface = cairo_image_surface_create_for_data(data, CAIRO_FORMAT_ARGB32,
width, height, stride);
ret = cairo_surface_status(surface);
if (ret != CAIRO_STATUS_SUCCESS)
goto fail;
ret = cairo_surface_set_user_data(surface,
&weston_cairo_util_load_cairo_surface_key,
image,
loaded_cairo_surface_destructor);
if (ret != CAIRO_STATUS_SUCCESS)
goto fail;
return surface;
fail:
cairo_surface_destroy(surface);
pixman_image_unref(image);
return NULL;
}
void
theme_set_background_source(struct theme *t, cairo_t *cr, uint32_t flags)
{
cairo_pattern_t *pattern;
if (flags & THEME_FRAME_ACTIVE) {
pattern = cairo_pattern_create_linear(16, 16, 16, 112);
cairo_pattern_add_color_stop_rgb(pattern, 0.0, 1.0, 1.0, 1.0);
cairo_pattern_add_color_stop_rgb(pattern, 0.2, 0.8, 0.8, 0.8);
cairo_set_source(cr, pattern);
cairo_pattern_destroy(pattern);
} else {
cairo_set_source_rgba(cr, 0.75, 0.75, 0.75, 1);
}
}
struct theme *
theme_create(void)
{
struct theme *t;
cairo_t *cr;
t = malloc(sizeof *t);
if (t == NULL)
return NULL;
t->margin = 32;
t->width = 6;
t->titlebar_height = 27;
t->frame_radius = 3;
t->shadow = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 128, 128);
cr = cairo_create(t->shadow);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
cairo_set_source_rgba(cr, 0, 0, 0, 1);
rounded_rect(cr, 32, 32, 96, 96, t->frame_radius);
cairo_fill(cr);
if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)
goto err_shadow;
cairo_destroy(cr);
if (blur_surface(t->shadow, 64) == -1)
goto err_shadow;
t->active_frame =
cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 128, 128);
cr = cairo_create(t->active_frame);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
theme_set_background_source(t, cr, THEME_FRAME_ACTIVE);
rounded_rect(cr, 0, 0, 128, 128, t->frame_radius);
cairo_fill(cr);
if (cairo_status(cr) != CAIRO_STATUS_SUCCESS)
goto err_active_frame;
cairo_destroy(cr);
t->inactive_frame =
cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 128, 128);
cr = cairo_create(t->inactive_frame);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
theme_set_background_source(t, cr, 0);
rounded_rect(cr, 0, 0, 128, 128, t->frame_radius);
cairo_fill(cr);
if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)
goto err_inactive_frame;
cairo_destroy(cr);
return t;
err_inactive_frame:
cairo_surface_destroy(t->inactive_frame);
err_active_frame:
cairo_surface_destroy(t->active_frame);
err_shadow:
cairo_surface_destroy(t->shadow);
free(t);
return NULL;
}
void
theme_destroy(struct theme *t)
{
cairo_surface_destroy(t->active_frame);
cairo_surface_destroy(t->inactive_frame);
cairo_surface_destroy(t->shadow);
free(t);
}
#ifdef HAVE_PANGO
static PangoLayout *
create_layout(cairo_t *cr, const char *title)
{
PangoFontMap *fontmap;
PangoContext *context;
PangoLayout *layout;
PangoFontDescription *desc;
fontmap = pango_cairo_font_map_new();
context = pango_font_map_create_context(fontmap);
g_object_unref(fontmap);
pango_cairo_font_map_set_default(NULL);
pango_cairo_update_context(cr, context);
layout = pango_layout_new(context);
g_object_unref(context);
if (title) {
pango_layout_set_text(layout, title, -1);
desc = pango_font_description_from_string("sans-serif Bold 10");
pango_layout_set_font_description(layout, desc);
pango_font_description_free(desc);
}
pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
pango_layout_set_alignment(layout, PANGO_ALIGN_LEFT);
pango_layout_set_auto_dir (layout, FALSE);
pango_layout_set_single_paragraph_mode (layout, TRUE);
pango_layout_set_width (layout, -1);
return layout;
}
#endif
#ifdef HAVE_PANGO
#define SHOW_TEXT(cr) \
pango_cairo_show_layout(cr, title_layout)
#else
#define SHOW_TEXT(cr) \
cairo_show_text(cr, title)
#endif
void
theme_render_frame(struct theme *t,
cairo_t *cr, int width, int height,
const char *title, cairo_rectangle_int_t *title_rect,
struct wl_list *buttons, uint32_t flags)
{
cairo_surface_t *source;
int x, y, margin, top_margin;
int text_width, text_height;
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba(cr, 0, 0, 0, 0);
cairo_paint(cr);
if (flags & THEME_FRAME_MAXIMIZED)
margin = 0;
else {
render_shadow(cr, t->shadow,
2, 2, width + 8, height + 8,
64, 64);
margin = t->margin;
}
if (flags & THEME_FRAME_ACTIVE)
source = t->active_frame;
else
source = t->inactive_frame;
if (title || !wl_list_empty(buttons))
top_margin = t->titlebar_height;
else
top_margin = t->width;
tile_source(cr, source,
margin, margin,
width - margin * 2, height - margin * 2,
t->width, top_margin);
if (title || !wl_list_empty(buttons)) {
cairo_rectangle (cr, title_rect->x, title_rect->y,
title_rect->width, title_rect->height);
cairo_clip(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
#ifdef HAVE_PANGO
PangoLayout *title_layout;
PangoRectangle logical;
cairo_save(cr);
title_layout = create_layout(cr, title);
pango_layout_get_pixel_extents (title_layout, NULL, &logical);
text_width = MIN(title_rect->width, logical.width);
text_height = logical.height;
if (text_width < logical.width)
pango_layout_set_width (title_layout, text_width * PANGO_SCALE);
#else
cairo_text_extents_t extents;
cairo_font_extents_t font_extents;
cairo_select_font_face(cr, "sans-serif",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_BOLD);
cairo_set_font_size(cr, 14);
cairo_text_extents(cr, title, &extents);
cairo_font_extents (cr, &font_extents);
text_width = extents.width;
text_height = font_extents.descent - font_extents.ascent;
#endif
x = (width - text_width) / 2;
y = margin + (t->titlebar_height - text_height) / 2;
if (x < title_rect->x)
x = title_rect->x;
else if (x + text_width > (title_rect->x + title_rect->width))
x = (title_rect->x + title_rect->width) - text_width;
if (flags & THEME_FRAME_ACTIVE) {
cairo_move_to(cr, x + 1, y + 1);
cairo_set_source_rgb(cr, 1, 1, 1);
SHOW_TEXT(cr);
cairo_move_to(cr, x, y);
cairo_set_source_rgb(cr, 0, 0, 0);
SHOW_TEXT(cr);
} else {
cairo_move_to(cr, x, y);
cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
SHOW_TEXT(cr);
}
#ifdef HAVE_PANGO
cairo_restore(cr);
g_object_unref(title_layout);
#endif
}
}
enum theme_location
theme_get_location(struct theme *t, int x, int y,
int width, int height, int flags)
{
int vlocation, hlocation, location;
int margin, top_margin, grip_size;
if (flags & THEME_FRAME_MAXIMIZED) {
margin = 0;
grip_size = 0;
} else {
margin = t->margin;
grip_size = 8;
}
if (flags & THEME_FRAME_NO_TITLE)
top_margin = t->width;
else
top_margin = t->titlebar_height;
if (x < margin)
hlocation = THEME_LOCATION_EXTERIOR;
else if (x < margin + grip_size)
hlocation = THEME_LOCATION_RESIZING_LEFT;
else if (x < width - margin - grip_size)
hlocation = THEME_LOCATION_INTERIOR;
else if (x < width - margin)
hlocation = THEME_LOCATION_RESIZING_RIGHT;
else
hlocation = THEME_LOCATION_EXTERIOR;
if (y < margin)
vlocation = THEME_LOCATION_EXTERIOR;
else if (y < margin + grip_size)
vlocation = THEME_LOCATION_RESIZING_TOP;
else if (y < height - margin - grip_size)
vlocation = THEME_LOCATION_INTERIOR;
else if (y < height - margin)
vlocation = THEME_LOCATION_RESIZING_BOTTOM;
else
vlocation = THEME_LOCATION_EXTERIOR;
location = vlocation | hlocation;
if (location & THEME_LOCATION_EXTERIOR)
location = THEME_LOCATION_EXTERIOR;
if (location == THEME_LOCATION_INTERIOR &&
y < margin + top_margin)
location = THEME_LOCATION_TITLEBAR;
else if (location == THEME_LOCATION_INTERIOR)
location = THEME_LOCATION_CLIENT_AREA;
return location;
}
/** Cleanup static Cairo/Pango data
*
* Using Cairo, Pango, PangoCairo, and fontconfig, ends up leaving a trail of
* thread-cached data behind us. Clean up what we can.
*/
void
cleanup_after_cairo(void)
{
cairo_debug_reset_static_data();
#ifdef HAVE_PANGO
FcFini();
#endif
}
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