Add an overlay type window in the compositor.
diff --git a/egl-compositor.c b/egl-compositor.c
index 24f4733..8c2cfdd 100644
--- a/egl-compositor.c
+++ b/egl-compositor.c
@@ -13,6 +13,7 @@
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <glib.h>
#include <png.h>
+#include <math.h>
#include "wayland.h"
#include "cairo-util.h"
@@ -33,6 +34,7 @@
int width, height;
struct egl_surface *pointer;
struct egl_surface *background;
+ struct egl_surface *overlay;
};
struct egl_surface {
@@ -177,6 +179,48 @@
free(data);
}
+static struct egl_surface *
+egl_surface_create_from_cairo_surface(cairo_surface_t *surface,
+ int x, int y, int width, int height)
+{
+ struct egl_surface *es;
+ int stride;
+ void *data;
+
+ stride = cairo_image_surface_get_stride(surface);
+ data = cairo_image_surface_get_data(surface);
+
+ es = malloc(sizeof *es);
+ if (es == NULL)
+ return NULL;
+
+ glGenTextures(1, &es->texture);
+ glBindTexture(GL_TEXTURE_2D, es->texture);
+ glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
+ GL_BGRA, GL_UNSIGNED_BYTE, data);
+
+ es->map.x = x;
+ es->map.y = y;
+ es->map.width = width;
+ es->map.height = height;
+ es->surface = EGL_NO_SURFACE;
+
+ return es;
+}
+
+static void
+egl_surface_destroy(struct egl_surface *es, struct egl_compositor *ec)
+{
+ glDeleteTextures(1, &es->texture);
+ if (es->surface != EGL_NO_SURFACE)
+ eglDestroySurface(ec->display, es->surface);
+ free(es);
+}
+
static void
pointer_path(cairo_t *cr, int x, int y)
{
@@ -196,16 +240,10 @@
static struct egl_surface *
pointer_create(int x, int y, int width, int height)
{
+ struct egl_surface *es;
const int hotspot_x = 16, hotspot_y = 16;
- struct egl_surface *pointer;
cairo_surface_t *surface;
cairo_t *cr;
- int stride;
- void *data;
-
- pointer = malloc(sizeof *pointer);
- if (pointer == NULL)
- return NULL;
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
width, height);
@@ -224,36 +262,11 @@
cairo_fill(cr);
cairo_destroy(cr);
- stride = cairo_image_surface_get_stride(surface);
- data = cairo_image_surface_get_data(surface);
-
- glGenTextures(1, &pointer->texture);
- glBindTexture(GL_TEXTURE_2D, pointer->texture);
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
- GL_BGRA, GL_UNSIGNED_BYTE, data);
-
+ es = egl_surface_create_from_cairo_surface(surface, x, y, width, height);
+
cairo_surface_destroy(surface);
- pointer->map.x = x;
- pointer->map.y = y;
- pointer->map.width = width;
- pointer->map.height = height;
- pointer->surface = EGL_NO_SURFACE;
-
- return pointer;
-}
-
-static void
-egl_surface_destroy(struct egl_surface *es, struct egl_compositor *ec)
-{
- glDeleteTextures(1, &es->texture);
- if (es->surface != EGL_NO_SURFACE)
- eglDestroySurface(ec->display, es->surface);
- free(es);
+ return es;
}
static struct egl_surface *
@@ -300,6 +313,101 @@
}
static 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
+draw_button(cairo_t *cr, int x, int y, int width, int height, const char *text)
+{
+ cairo_pattern_t *gradient;
+ cairo_text_extents_t extents;
+ double bright = 0.15, dim = 0.02;
+ int radius = 10;
+
+ cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
+ cairo_set_line_width (cr, 2);
+ rounded_rect(cr, x, y, x + width, y + height, radius);
+ cairo_set_source_rgb(cr, dim, dim, dim);
+ cairo_stroke(cr);
+ rounded_rect(cr, x + 2, y + 2, x + width, y + height, radius);
+ cairo_set_source_rgb(cr, 0.1, 0.1, 0.1);
+ cairo_stroke(cr);
+
+ rounded_rect(cr, x + 1, y + 1, x + width - 1, y + height - 1, radius - 1);
+ cairo_set_source_rgb(cr, bright, bright, bright);
+ cairo_stroke(cr);
+ rounded_rect(cr, x + 3, y + 3, x + width - 1, y + height - 1, radius - 1);
+ cairo_set_source_rgb(cr, dim, dim, dim);
+ cairo_stroke(cr);
+
+ rounded_rect(cr, x + 1, y + 1, x + width - 1, y + height - 1, radius - 1);
+ gradient = cairo_pattern_create_linear (0, y, 0, y + height);
+ cairo_pattern_add_color_stop_rgb(gradient, 0, 0.15, 0.15, 0.15);
+ cairo_pattern_add_color_stop_rgb(gradient, 0.5, 0.08, 0.08, 0.08);
+ cairo_pattern_add_color_stop_rgb(gradient, 0.5, 0.07, 0.07, 0.07);
+ cairo_pattern_add_color_stop_rgb(gradient, 1, 0.1, 0.1, 0.1);
+ cairo_set_source(cr, gradient);
+ cairo_fill(cr);
+
+ cairo_set_font_size(cr, 16);
+ cairo_text_extents(cr, text, &extents);
+ cairo_move_to(cr, x + (width - extents.width) / 2, y + (height - extents.height) / 2 - extents.y_bearing);
+ cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
+ cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
+ cairo_set_line_width (cr, 4);
+ cairo_text_path(cr, text);
+ cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
+ cairo_stroke_preserve(cr);
+ cairo_set_source_rgb(cr, 1, 1, 1);
+ cairo_fill(cr);
+}
+
+static struct egl_surface *
+overlay_create(int x, int y, int width, int height)
+{
+ struct egl_surface *es;
+ cairo_surface_t *surface;
+ cairo_t *cr;
+ int total_width, button_x, button_y;
+ const int button_width = 150;
+ const int button_height = 40;
+ const int spacing = 50;
+
+ surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
+ width, height);
+
+ cr = cairo_create(surface);
+ cairo_set_source_rgba(cr, 0.1, 0.1, 0.1, 0.7);
+ cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+ cairo_paint(cr);
+
+ total_width = button_width * 2 + spacing;
+ button_x = (width - total_width) / 2;
+ button_y = height - button_height - 20;
+ draw_button(cr, button_x, button_y, button_width, button_height, "Previous");
+ button_x += button_width + spacing;
+ draw_button(cr, button_x, button_y, button_width, button_height, "Next");
+
+ cairo_destroy(cr);
+
+ es = egl_surface_create_from_cairo_surface(surface, x, y, width, height);
+
+ cairo_surface_destroy(surface);
+
+ return es;
+}
+
+static void
draw_surface(struct egl_surface *es)
{
GLint vertices[12];
@@ -356,6 +464,8 @@
}
wl_surface_iterator_destroy(iterator);
+ draw_surface(ec->overlay);
+
draw_surface(ec->pointer);
eglSwapBuffers(ec->display, ec->surface);
@@ -585,6 +695,7 @@
filename = "background.jpg";
ec->background = background_create(filename, 1280, 800);
ec->pointer = pointer_create(100, 100, 64, 64);
+ ec->overlay = overlay_create(0, ec->height - 200, ec->width, 200);
ec->gem_fd = open(gem_device, O_RDWR);
if (ec->gem_fd < 0) {