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Add a window client, first implementation of surface resizing.

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Kristian Høgsberg 16 years ago
parent 2a20d83fdb
commit 61017b190a
2 changed files with 292 additions and 1 deletions
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  1. 3
      Makefile
  2. 290
      window.c

3
Makefile
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@ -1,7 +1,7 @@
CFLAGS += -Wall -g $(shell pkg-config --cflags libffi libdrm)
LDLIBS += $(shell pkg-config --libs libffi libdrm)
clients = flower pointer background
clients = flower pointer background window
all : wayland $(clients)
@ -20,6 +20,7 @@ libwayland.so : $(libwayland_objs)
flower_objs = flower.o
pointer_objs = pointer.o
background_objs = background.o
window_objs = window.o
$(clients) : CFLAGS += $(shell pkg-config --cflags cairo)
$(clients) : LDLIBS += $(shell pkg-config --libs cairo gdk-pixbuf-2.0) -lrt

290
window.c
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@ -0,0 +1,290 @@
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <i915_drm.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <fcntl.h>
#include <unistd.h>
#include <math.h>
#include <time.h>
#include <cairo.h>
#include "wayland-client.h"
static const char gem_device[] = "/dev/dri/card0";
static const char socket_name[] = "\0wayland";
static void
unpremultiply_data(uint8_t *data, int width, int height, int stride)
{
unsigned int i, j;
uint8_t *row;
for (j = 0; j < height; j++) {
row = data + j * stride;
for (i = 0; i < width; i++) {
uint8_t *b = &row[i * 4];
uint32_t pixel;
uint8_t alpha;
memcpy (&pixel, b, sizeof (uint32_t));
alpha = (pixel & 0xff000000) >> 24;
if (alpha == 0) {
b[0] = b[1] = b[2] = b[3] = 0;
} else {
b[0] = (((pixel & 0xff0000) >> 16) * 255 + alpha / 2) / alpha;
b[1] = (((pixel & 0x00ff00) >> 8) * 255 + alpha / 2) / alpha;
b[2] = (((pixel & 0x0000ff) >> 0) * 255 + alpha / 2) / alpha;
b[3] = alpha;
}
}
}
}
static uint32_t name_cairo_surface(int fd, cairo_surface_t *surface)
{
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);
unpremultiply_data(data, width, height, 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");
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;
}
struct window {
struct wl_surface *surface;
int x, y, width, height, stride;
int drag_x, drag_y, last_x, last_y;
int state;
uint32_t name;
int fd;
};
static void *
draw_window(struct window *window)
{
cairo_surface_t *surface;
cairo_t *cr;
int border = 4;
int half = (border + 1) / 2;
surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
window->width,
window->height);
cr = cairo_create(surface);
cairo_set_line_width (cr, border);
cairo_move_to(cr, half, half);
cairo_line_to(cr, window->width - half, half);
cairo_line_to(cr, window->width - half,
window->height - half);
cairo_line_to(cr, half, window->height - half);
cairo_close_path(cr);
cairo_set_source_rgba(cr, 0, 0, 0, 0.85);
cairo_fill_preserve(cr);
cairo_set_source_rgba(cr, 0, 0, 0, 1);
cairo_stroke(cr);
cairo_destroy(cr);
window->stride = cairo_image_surface_get_stride(surface);
window->name = name_cairo_surface(window->fd, surface);
cairo_surface_destroy(surface);
wl_surface_attach(window->surface, window->name,
window->width, window->height, window->stride);
wl_surface_map(window->surface,
window->x, window->y,
window->width, window->height);
return surface;
}
static int
connection_update(struct wl_connection *connection,
uint32_t mask, void *data)
{
struct pollfd *p = data;
p->events = 0;
if (mask & WL_CONNECTION_READABLE)
p->events |= POLLIN;
if (mask & WL_CONNECTION_WRITABLE)
p->events |= POLLOUT;
return 0;
}
enum window_state {
WINDOW_STABLE,
WINDOW_MOVING,
WINDOW_RESIZING_UPPER_LEFT,
WINDOW_RESIZING_UPPER_RIGHT,
WINDOW_RESIZING_LOWER_LEFT,
WINDOW_RESIZING_LOWER_RIGHT
};
enum location {
LOCATION_INTERIOR,
LOCATION_UPPER_LEFT,
LOCATION_UPPER_RIGHT,
LOCATION_LOWER_LEFT,
LOCATION_LOWER_RIGHT,
LOCATION_OUTSIDE
};
void event_handler(struct wl_display *display,
uint32_t opcode,
uint32_t arg1, uint32_t arg2, void *data)
{
struct window *window = data;
int location, border = 4;
int grip_size = 16;
if (opcode == 0) {
window->last_x = arg1;
window->last_y = arg2;
switch (window->state) {
case WINDOW_MOVING:
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);
break;
case WINDOW_RESIZING_LOWER_RIGHT:
window->width = window->drag_x + arg1;
window->height = window->drag_y + arg2;
draw_window(window);
break;
}
}
if (window->x + border <= window->last_x &&
window->last_x < window->x + window->width - border &&
window->y + border <= window->last_y &&
window->last_y < window->y + window->height - border) {
location = LOCATION_INTERIOR;
} else if (window->x + window->width - grip_size <= window->last_x &&
window->last_x < window->x + window->width &&
window->y + window->height - grip_size <= window->last_y &&
window->last_y < window->y + window->height) {
location = LOCATION_LOWER_RIGHT;
} else {
location = LOCATION_OUTSIDE;
}
if (opcode == 1 && arg1 == 0 && arg2 == 1) {
switch (location) {
case LOCATION_INTERIOR:
window->drag_x = window->x - window->last_x;
window->drag_y = window->y - window->last_y;
window->state = WINDOW_MOVING;
break;
case LOCATION_LOWER_RIGHT:
window->drag_x = window->width - window->last_x;
window->drag_y = window->height - window->last_y;
window->state = WINDOW_RESIZING_LOWER_RIGHT;
break;
default:
window->state = WINDOW_STABLE;
break;
}
} else if (opcode == 1 && arg1 == 0 && arg2 == 0) {
window->state = WINDOW_STABLE;
}
}
int main(int argc, char *argv[])
{
struct wl_display *display;
int fd, ret;
uint32_t mask;
cairo_surface_t *s;
struct pollfd p[1];
struct window window;
fd = open(gem_device, O_RDWR);
if (fd < 0) {
fprintf(stderr, "drm open failed: %m\n");
return -1;
}
display = wl_display_create(socket_name,
connection_update, &p[0]);
if (display == NULL) {
fprintf(stderr, "failed to create display: %m\n");
return -1;
}
p[0].fd = wl_display_get_fd(display);
window.surface = wl_display_create_surface(display);
window.x = 200;
window.y = 200;
window.width = 350;
window.height = 200;
window.state = WINDOW_STABLE;
window.fd = fd;
s = draw_window(&window);
wl_display_set_event_handler(display, event_handler, &window);
while (ret = poll(p, 1, -1), ret >= 0) {
mask = 0;
if (p[0].revents & POLLIN)
mask |= WL_CONNECTION_READABLE;
if (p[0].revents & POLLOUT)
mask |= WL_CONNECTION_WRITABLE;
if (mask)
wl_display_iterate(display, mask);
}
return 0;
}
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