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weston/shared/cairo-util.c

698 lines
18 KiB

/*
* 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
}