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weston/shared/cairo-util.c

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11 KiB

/*
* Copyright © 2008 Kristian Høgsberg
* Copyright © 2012 Intel Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include "../config.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <math.h>
#include <cairo.h>
#include "cairo-util.h"
#include "../shared/config-parser.h"
#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
void
surface_flush_device(cairo_surface_t *surface)
{
cairo_device_t *device;
device = cairo_surface_get_device(surface);
if (device)
cairo_device_flush(device);
}
void
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);
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);
}
void
tile_mask(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);
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_reset_clip(cr);
cairo_rectangle(cr,
x + fx * (width - margin),
y + fy * (height - vmargin),
margin, vmargin);
cairo_clip (cr);
cairo_mask(cr, pattern);
}
/* 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, width - 2 * margin, margin);
cairo_reset_clip(cr);
cairo_rectangle(cr,
x + margin,
y,
width - 2 * margin, margin);
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,
width - 2 * margin, margin);
cairo_clip (cr);
cairo_mask(cr, pattern);
/* 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 + margin, margin, height - 2 * margin);
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 - margin, y + margin,
margin, height - 2 * margin);
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);
cairo_pattern_destroy(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);
}
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);
}
cairo_surface_t *
load_cairo_surface(const char *filename)
{
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);
return cairo_image_surface_create_for_data(data, CAIRO_FORMAT_ARGB32,
width, height, stride);
}
struct theme *
theme_create(void)
{
struct theme *t;
cairo_t *cr;
cairo_pattern_t *pattern;
t = malloc(sizeof *t);
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);
cairo_destroy(cr);
blur_surface(t->shadow, 64);
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);
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);
rounded_rect(cr, 0, 0, 128, 128, t->frame_radius);
cairo_fill(cr);
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);
cairo_set_source_rgba(cr, 0.75, 0.75, 0.75, 1);
rounded_rect(cr, 0, 0, 128, 128, t->frame_radius);
cairo_fill(cr);
cairo_destroy(cr);
return t;
}
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);
}
void
theme_render_frame(struct theme *t,
cairo_t *cr, int width, int height,
const char *title, uint32_t flags)
{
cairo_text_extents_t extents;
cairo_font_extents_t font_extents;
cairo_surface_t *source;
int x, y;
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba(cr, 0, 0, 0, 0);
cairo_paint(cr);
cairo_set_source_rgba(cr, 0, 0, 0, 0.45);
tile_mask(cr, t->shadow,
2, 2, width + 8, height + 8,
64, 64);
if (flags & THEME_FRAME_ACTIVE)
source = t->active_frame;
else
source = t->inactive_frame;
tile_source(cr, source,
t->margin, t->margin,
width - t->margin * 2, height - t->margin * 2,
t->width, t->titlebar_height);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
cairo_select_font_face(cr, "sans",
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);
x = (width - extents.width) / 2;
y = t->margin +
(t->titlebar_height -
font_extents.ascent - font_extents.descent) / 2 +
font_extents.ascent;
if (flags & THEME_FRAME_ACTIVE) {
cairo_move_to(cr, x + 1, y + 1);
cairo_set_source_rgb(cr, 1, 1, 1);
cairo_show_text(cr, title);
cairo_move_to(cr, x, y);
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_show_text(cr, title);
} else {
cairo_move_to(cr, x, y);
cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
cairo_show_text(cr, title);
}
}