1 files changed, 511 insertions, 0 deletions

diff --git a/shared/cairo-util.c b/shared/cairo-util.c
new file mode 100644
index 00000000..4305ba69
--- /dev/null
+++ b/shared/cairo-util.c
@@ -0,0 +1,511 @@
+/*
+ * 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 "image-loader.h"
+#include "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);
+}
+
+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
+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);
+	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);
+
+	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);
+
+	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);
+	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);
+
+	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);
+}
+
+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, margin;
+
+	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 {
+		cairo_set_source_rgba(cr, 0, 0, 0, 0.45);
+		tile_mask(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;
+
+	tile_source(cr, source,
+		    margin, margin,
+		    width - margin * 2, height - margin * 2,
+		    t->width, t->titlebar_height);
+
+	cairo_rectangle (cr, margin + t->width, margin,
+			 width - (margin + t->width) * 2,
+			 t->titlebar_height - t->width);
+	cairo_clip(cr);
+
+	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 = 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);
+	}
+}
+
+enum theme_location
+theme_get_location(struct theme *t, int x, int y,
+				int width, int height, int flags)
+{
+	int vlocation, hlocation, location;
+	const int grip_size = 8;
+	int margin;
+
+	margin = (flags & THEME_FRAME_MAXIMIZED) ? 0 : t->margin;
+
+	if (x < margin)
+		hlocation = THEME_LOCATION_EXTERIOR;
+	else if (margin <= x && 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 (margin <= y && 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 + t->titlebar_height)
+		location = THEME_LOCATION_TITLEBAR;
+	else if (location == THEME_LOCATION_INTERIOR)
+		location = THEME_LOCATION_CLIENT_AREA;
+
+	return location;
+}