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Factor out common cairo code, add blur function.

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Kristian Høgsberg 16 years ago
parent e4feb56316
commit 2f2cfae227
5 changed files with 245 additions and 171 deletions
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  1. 4
      Makefile
  2. 176
      cairo-util.c
  3. 24
      cairo-util.h
  4. 97
      pointer.c
  5. 115
      window.c

4
Makefile
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@ -45,9 +45,9 @@ libwayland.so $(compositors) :
gcc -o $@ $^ $(LDLIBS) -shared
flower_objs = flower.o wayland-glib.o
pointer_objs = pointer.o wayland-glib.o
pointer_objs = pointer.o wayland-glib.o cairo-util.o
background_objs = background.o wayland-glib.o
window_objs = window.o gears.o wayland-glib.o
window_objs = window.o gears.o wayland-glib.o cairo-util.o
$(clients) : CFLAGS += $(shell pkg-config --cflags cairo glib-2.0)
$(clients) : LDLIBS += $(shell pkg-config --libs cairo glib-2.0) -lrt

176
cairo-util.c
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@ -0,0 +1,176 @@
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <i915_drm.h>
#include <sys/ioctl.h>
#include <math.h>
#include <cairo.h>
#include "cairo-util.h"
struct buffer *
buffer_create(int fd, int width, int height, int stride)
{
struct buffer *buffer;
struct drm_i915_gem_create create;
struct drm_gem_flink flink;
buffer = malloc(sizeof *buffer);
buffer->width = width;
buffer->height = height;
buffer->stride = stride;
memset(&create, 0, sizeof(create));
create.size = height * stride;
if (ioctl(fd, DRM_IOCTL_I915_GEM_CREATE, &create) != 0) {
fprintf(stderr, "gem create failed: %m\n");
free(buffer);
return NULL;
}
flink.handle = create.handle;
if (ioctl(fd, DRM_IOCTL_GEM_FLINK, &flink) != 0) {
fprintf(stderr, "gem flink failed: %m\n");
free(buffer);
return 0;
}
buffer->handle = flink.handle;
buffer->name = flink.name;
return buffer;
}
int
buffer_destroy(struct buffer *buffer, int fd)
{
struct drm_gem_close close;
close.handle = buffer->handle;
if (ioctl(fd, DRM_IOCTL_GEM_CLOSE, &close) < 0) {
fprintf(stderr, "gem close failed: %m\n");
return -1;
}
free(buffer);
return 0;
}
int
buffer_data(struct buffer *buffer, int fd, void *data)
{
struct drm_i915_gem_pwrite pwrite;
pwrite.handle = buffer->handle;
pwrite.offset = 0;
pwrite.size = buffer->height * buffer->stride;
pwrite.data_ptr = (uint64_t) (uintptr_t) data;
if (ioctl(fd, DRM_IOCTL_I915_GEM_PWRITE, &pwrite) < 0) {
fprintf(stderr, "gem pwrite failed: %m\n");
return -1;
}
return 0;
}
struct buffer *
buffer_create_from_cairo_surface(int fd, cairo_surface_t *surface)
{
struct buffer *buffer;
int32_t width, height, stride;
void *data;
width = cairo_image_surface_get_width(surface);
height = cairo_image_surface_get_height(surface);
stride = cairo_image_surface_get_stride(surface);
data = cairo_image_surface_get_data(surface);
buffer = buffer_create(fd, width, height, stride);
if (buffer == NULL)
return NULL;
if (buffer_data(buffer, fd, data) < 0) {
buffer_destroy(buffer, fd);
return NULL;
}
return buffer;
}
void
blur_surface(cairo_surface_t *surface)
{
cairo_surface_t *tmp;
int32_t width, height, stride, x, y, z, w;
uint8_t *src, *dst;
uint32_t *s, *d, a, p;
int i, j, k, size = 23, half;
uint8_t kernel[100];
double f;
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);
tmp = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height);
dst = cairo_image_surface_get_data(tmp);
half = size / 2;
a = 0;
for (i = 0; i < size; i++) {
f = (i - half);
kernel[i] = exp(- f * f / 30.0) * 80;
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++) {
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++) {
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;
}
}
cairo_surface_destroy(tmp);
}

24
cairo-util.h
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@ -0,0 +1,24 @@
#ifndef _CAIRO_UTIL_H
#define _CAIRO_UTIL_H
struct buffer {
int width, height, stride;
uint32_t name, handle;
};
struct buffer *
buffer_create(int fd, int width, int height, int stride);
int
buffer_destroy(struct buffer *buffer, int fd);
int
buffer_data(struct buffer *buffer, int fd, void *data);
struct buffer *
buffer_create_from_cairo_surface(int fd, cairo_surface_t *surface);
void
blur_surface(cairo_surface_t *surface);
#endif

97
pointer.c
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@ -2,8 +2,6 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <i915_drm.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <math.h>
@ -13,64 +11,31 @@
#include "wayland-client.h"
#include "wayland-glib.h"
#include "cairo-util.h"
static const char gem_device[] = "/dev/dri/card0";
static const char socket_name[] = "\0wayland";
static uint32_t name_cairo_surface(int fd, cairo_surface_t *surface)
static void
pointer_path(cairo_t *cr, int x, int y)
{
struct drm_i915_gem_create create;
struct drm_gem_flink flink;
struct drm_i915_gem_pwrite pwrite;
int32_t width, height, stride;
void *data;
width = cairo_image_surface_get_width(surface);
height = cairo_image_surface_get_height(surface);
stride = cairo_image_surface_get_stride(surface);
data = cairo_image_surface_get_data(surface);
memset(&create, 0, sizeof(create));
create.size = height * stride;
if (ioctl(fd, DRM_IOCTL_I915_GEM_CREATE, &create) != 0) {
fprintf(stderr, "gem create failed: %m\n");
return 0;
}
pwrite.handle = create.handle;
pwrite.offset = 0;
pwrite.size = height * stride;
pwrite.data_ptr = (uint64_t) (uintptr_t) data;
if (ioctl(fd, DRM_IOCTL_I915_GEM_PWRITE, &pwrite) < 0) {
fprintf(stderr, "gem pwrite failed: %m\n");
return 0;
}
flink.handle = create.handle;
if (ioctl(fd, DRM_IOCTL_GEM_FLINK, &flink) != 0) {
fprintf(stderr, "gem flink failed: %m\n");
return 0;
}
#if 0
/* We need to hold on to the handle until the server has received
* the attach request... we probably need a confirmation event.
* I guess the breadcrumb idea will suffice. */
struct drm_gem_close close;
close.handle = create.handle;
if (ioctl(fd, DRM_IOCTL_GEM_CLOSE, &close) < 0) {
fprintf(stderr, "gem close failed: %m\n");
return 0;
}
#endif
return flink.name;
const int end = 4, tx = 2, ty = 7, dx = 3, dy = 5;
const int width = 16, height = 16;
cairo_move_to(cr, x, y);
cairo_line_to(cr, x + tx, y + ty);
cairo_line_to(cr, x + dx, y + dy);
cairo_line_to(cr, x + width - end, y + height);
cairo_line_to(cr, x + width, y + height - end);
cairo_line_to(cr, x + dy, y + dx);
cairo_line_to(cr, x + ty, y + tx);
cairo_close_path(cr);
}
static void *
draw_pointer(int width, int height)
{
const int d = 2, end = 6, tx = 2, ty = 7, dx = 3, dy = 5;
const int hotspot_x = 16, hotspot_y = 16;
cairo_surface_t *surface;
cairo_t *cr;
@ -78,20 +43,17 @@ draw_pointer(int width, int height)
width, height);
cr = cairo_create(surface);
cairo_set_line_width (cr, d);
cairo_move_to(cr, d, d);
cairo_line_to(cr, d + tx, d + ty);
cairo_line_to(cr, d + dx, d + dy);
cairo_line_to(cr, width - end, height - d);
cairo_line_to(cr, width - d, height - end);
cairo_line_to(cr, d + dy, d + dx);
cairo_line_to(cr, d + ty, d + tx);
cairo_close_path(cr);
pointer_path(cr, hotspot_x + 3, hotspot_y + 2);
cairo_set_line_width (cr, 2);
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_stroke_preserve(cr);
cairo_set_source_rgb(cr, 1, 1, 1);
cairo_fill(cr);
blur_surface(surface);
pointer_path(cr, hotspot_x, hotspot_y);
cairo_stroke_preserve(cr);
cairo_set_source_rgb(cr, 1, 1, 1);
cairo_fill(cr);
cairo_destroy(cr);
return surface;
@ -118,10 +80,10 @@ int main(int argc, char *argv[])
struct wl_display *display;
struct pointer pointer;
int fd;
uint32_t name;
cairo_surface_t *s;
GMainLoop *loop;
GSource *source;
struct buffer *buffer;
fd = open(gem_device, O_RDWR);
if (fd < 0) {
@ -139,16 +101,15 @@ int main(int argc, char *argv[])
source = wayland_source_new(display);
g_source_attach(source, NULL);
pointer.width = 16;
pointer.height = 16;
pointer.width = 48;
pointer.height = 48;
pointer.surface = wl_display_create_surface(display);
s = draw_pointer(pointer.width, pointer.height);
name = name_cairo_surface(fd, s);
buffer = buffer_create_from_cairo_surface(fd, s);
wl_surface_attach(pointer.surface, name,
pointer.width, pointer.height,
cairo_image_surface_get_stride(s));
wl_surface_attach(pointer.surface, buffer->name,
buffer->width, buffer->height, buffer->stride);
wl_surface_map(pointer.surface, 512, 384, pointer.width, pointer.height);
wl_display_set_event_handler(display, event_handler, &pointer);

115
window.c
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@ -2,8 +2,6 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <i915_drm.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <math.h>
@ -16,7 +14,9 @@
#include "wayland-client.h"
#include "wayland-glib.h"
#include "gears.h"
#include "cairo-util.h"
static const char gem_device[] = "/dev/dri/card0";
static const char socket_name[] = "\0wayland";
@ -27,103 +27,6 @@ static void die(const char *msg)
exit(EXIT_FAILURE);
}
struct buffer {
int width, height, stride;
uint32_t name, handle;
};
static struct buffer *
buffer_create(int fd, int width, int height, int stride)
{
struct buffer *buffer;
struct drm_i915_gem_create create;
struct drm_gem_flink flink;
buffer = malloc(sizeof *buffer);
buffer->width = width;
buffer->height = height;
buffer->stride = stride;
memset(&create, 0, sizeof(create));
create.size = height * stride;
if (ioctl(fd, DRM_IOCTL_I915_GEM_CREATE, &create) != 0) {
fprintf(stderr, "gem create failed: %m\n");
free(buffer);
return NULL;
}
flink.handle = create.handle;
if (ioctl(fd, DRM_IOCTL_GEM_FLINK, &flink) != 0) {
fprintf(stderr, "gem flink failed: %m\n");
free(buffer);
return 0;
}
buffer->handle = flink.handle;
buffer->name = flink.name;
return buffer;
}
static int
buffer_destroy(struct buffer *buffer, int fd)
{
struct drm_gem_close close;
close.handle = buffer->handle;
if (ioctl(fd, DRM_IOCTL_GEM_CLOSE, &close) < 0) {
fprintf(stderr, "gem close failed: %m\n");
return -1;
}
free(buffer);
return 0;
}
static int
buffer_data(struct buffer *buffer, int fd, void *data)
{
struct drm_i915_gem_pwrite pwrite;
pwrite.handle = buffer->handle;
pwrite.offset = 0;
pwrite.size = buffer->height * buffer->stride;
pwrite.data_ptr = (uint64_t) (uintptr_t) data;
if (ioctl(fd, DRM_IOCTL_I915_GEM_PWRITE, &pwrite) < 0) {
fprintf(stderr, "gem pwrite failed: %m\n");
return -1;
}
return 0;
}
static struct buffer *
buffer_create_from_cairo_surface(int fd, cairo_surface_t *surface)
{
struct buffer *buffer;
int32_t width, height, stride;
void *data;
width = cairo_image_surface_get_width(surface);
height = cairo_image_surface_get_height(surface);
stride = cairo_image_surface_get_stride(surface);
data = cairo_image_surface_get_data(surface);
buffer = buffer_create(fd, width, height, stride);
if (buffer == NULL)
return NULL;
if (buffer_data(buffer, fd, data) < 0) {
buffer_destroy(buffer, fd);
return NULL;
}
return buffer;
}
struct window {
struct wl_surface *surface;
int x, y, width, height;
@ -172,13 +75,23 @@ draw_window(void *data)
const static char title[] = "Wayland First Post";
surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
window->width, window->height);
window->width + 32, window->height + 32);
outline = cairo_pattern_create_rgb(0.1, 0.1, 0.1);
bright = cairo_pattern_create_rgb(0.6, 0.6, 0.6);
dim = cairo_pattern_create_rgb(0.4, 0.4, 0.4);
cr = cairo_create(surface);
cairo_translate(cr, 16 + 5, 16 + 3);
cairo_set_line_width (cr, border);
cairo_set_source_rgba(cr, 0, 0, 0, 0.5);
rounded_rect(cr, 1, 1, window->width - 1, window->height - 1, radius);
cairo_stroke_preserve(cr);
cairo_fill(cr);
blur_surface(surface);
cairo_translate(cr, -5, -3);
cairo_set_line_width (cr, border);
rounded_rect(cr, 1, 1, window->width - 1, window->height - 1, radius);
cairo_set_source(cr, outline);
@ -301,7 +214,7 @@ event_handler(struct wl_display *display,
window->x = window->drag_x + arg1;
window->y = window->drag_y + arg2;
wl_surface_map(window->surface, window->x, window->y,
window->width, window->height);
window->buffer->width, window->buffer->height);
break;
case WINDOW_RESIZING_LOWER_RIGHT:
window->width = window->drag_x + arg1;

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