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weston/tests/weston-test-client-helper.c

979 lines
24 KiB

/*
* 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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/mman.h>
#include "../shared/os-compatibility.h"
#include "weston-test-client-helper.h"
#define max(a, b) (((a) > (b)) ? (a) : (b))
#define min(a, b) (((a) > (b)) ? (b) : (a))
#define clip(x, a, b) min(max(x, a), b)
void *
fail_on_null(void *p)
{
if (p == NULL) {
fprintf(stderr, "out of memory\n");
exit(EXIT_FAILURE);
}
return p;
}
int
surface_contains(struct surface *surface, int x, int y)
{
/* test whether a global x,y point is contained in the surface */
int sx = surface->x;
int sy = surface->y;
int sw = surface->width;
int sh = surface->height;
return x >= sx && y >= sy && x < sx + sw && y < sy + sh;
}
static void
frame_callback_handler(void *data, struct wl_callback *callback, uint32_t time)
{
int *done = data;
*done = 1;
wl_callback_destroy(callback);
}
static const struct wl_callback_listener frame_listener = {
frame_callback_handler
};
struct wl_callback *
frame_callback_set(struct wl_surface *surface, int *done)
{
struct wl_callback *callback;
*done = 0;
callback = wl_surface_frame(surface);
wl_callback_add_listener(callback, &frame_listener, done);
return callback;
}
int
frame_callback_wait_nofail(struct client *client, int *done)
{
while (!*done) {
if (wl_display_dispatch(client->wl_display) < 0)
return 0;
}
return 1;
}
void
move_client(struct client *client, int x, int y)
{
struct surface *surface = client->surface;
int done;
client->surface->x = x;
client->surface->y = y;
weston_test_move_surface(client->test->weston_test, surface->wl_surface,
surface->x, surface->y);
/* The attach here is necessary because commit() will call configure
* only on surfaces newly attached, and the one that sets the surface
* position is the configure. */
wl_surface_attach(surface->wl_surface, surface->wl_buffer, 0, 0);
wl_surface_damage(surface->wl_surface, 0, 0, surface->width,
surface->height);
frame_callback_set(surface->wl_surface, &done);
wl_surface_commit(surface->wl_surface);
frame_callback_wait(client, &done);
}
int
get_n_egl_buffers(struct client *client)
{
client->test->n_egl_buffers = -1;
weston_test_get_n_egl_buffers(client->test->weston_test);
wl_display_roundtrip(client->wl_display);
return client->test->n_egl_buffers;
}
static void
pointer_handle_enter(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, struct wl_surface *wl_surface,
wl_fixed_t x, wl_fixed_t y)
{
struct pointer *pointer = data;
pointer->focus = wl_surface_get_user_data(wl_surface);
pointer->x = wl_fixed_to_int(x);
pointer->y = wl_fixed_to_int(y);
fprintf(stderr, "test-client: got pointer enter %d %d, surface %p\n",
pointer->x, pointer->y, pointer->focus);
}
static void
pointer_handle_leave(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, struct wl_surface *wl_surface)
{
struct pointer *pointer = data;
pointer->focus = NULL;
fprintf(stderr, "test-client: got pointer leave, surface %p\n",
wl_surface_get_user_data(wl_surface));
}
static void
pointer_handle_motion(void *data, struct wl_pointer *wl_pointer,
uint32_t time, wl_fixed_t x, wl_fixed_t y)
{
struct pointer *pointer = data;
pointer->x = wl_fixed_to_int(x);
pointer->y = wl_fixed_to_int(y);
fprintf(stderr, "test-client: got pointer motion %d %d\n",
pointer->x, pointer->y);
}
static void
pointer_handle_button(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, uint32_t time, uint32_t button,
uint32_t state)
{
struct pointer *pointer = data;
pointer->button = button;
pointer->state = state;
fprintf(stderr, "test-client: got pointer button %u %u\n",
button, state);
}
static void
pointer_handle_axis(void *data, struct wl_pointer *wl_pointer,
uint32_t time, uint32_t axis, wl_fixed_t value)
{
fprintf(stderr, "test-client: got pointer axis %u %f\n",
axis, wl_fixed_to_double(value));
}
static const struct wl_pointer_listener pointer_listener = {
pointer_handle_enter,
pointer_handle_leave,
pointer_handle_motion,
pointer_handle_button,
pointer_handle_axis,
};
static void
keyboard_handle_keymap(void *data, struct wl_keyboard *wl_keyboard,
uint32_t format, int fd, uint32_t size)
{
close(fd);
fprintf(stderr, "test-client: got keyboard keymap\n");
}
static void
keyboard_handle_enter(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial, struct wl_surface *wl_surface,
struct wl_array *keys)
{
struct keyboard *keyboard = data;
keyboard->focus = wl_surface_get_user_data(wl_surface);
fprintf(stderr, "test-client: got keyboard enter, surface %p\n",
keyboard->focus);
}
static void
keyboard_handle_leave(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial, struct wl_surface *wl_surface)
{
struct keyboard *keyboard = data;
keyboard->focus = NULL;
fprintf(stderr, "test-client: got keyboard leave, surface %p\n",
wl_surface_get_user_data(wl_surface));
}
static void
keyboard_handle_key(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial, uint32_t time, uint32_t key,
uint32_t state)
{
struct keyboard *keyboard = data;
keyboard->key = key;
keyboard->state = state;
fprintf(stderr, "test-client: got keyboard key %u %u\n", key, state);
}
static void
keyboard_handle_modifiers(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial, uint32_t mods_depressed,
uint32_t mods_latched, uint32_t mods_locked,
uint32_t group)
{
struct keyboard *keyboard = data;
keyboard->mods_depressed = mods_depressed;
keyboard->mods_latched = mods_latched;
keyboard->mods_locked = mods_locked;
keyboard->group = group;
fprintf(stderr, "test-client: got keyboard modifiers %u %u %u %u\n",
mods_depressed, mods_latched, mods_locked, group);
}
static void
keyboard_handle_repeat_info(void *data, struct wl_keyboard *wl_keyboard,
int32_t rate, int32_t delay)
{
struct keyboard *keyboard = data;
keyboard->repeat_info.rate = rate;
keyboard->repeat_info.delay = delay;
fprintf(stderr, "test-client: got keyboard repeat_info %d %d\n",
rate, delay);
}
static const struct wl_keyboard_listener keyboard_listener = {
keyboard_handle_keymap,
keyboard_handle_enter,
keyboard_handle_leave,
keyboard_handle_key,
keyboard_handle_modifiers,
keyboard_handle_repeat_info,
};
static void
touch_handle_down(void *data, struct wl_touch *wl_touch,
uint32_t serial, uint32_t time, struct wl_surface *surface,
int32_t id, wl_fixed_t x_w, wl_fixed_t y_w)
{
struct touch *touch = data;
touch->down_x = wl_fixed_to_int(x_w);
touch->down_y = wl_fixed_to_int(y_w);
touch->id = id;
fprintf(stderr, "test-client: got touch down %d %d, surf: %p, id: %d\n",
touch->down_x, touch->down_y, surface, id);
}
static void
touch_handle_up(void *data, struct wl_touch *wl_touch,
uint32_t serial, uint32_t time, int32_t id)
{
struct touch *touch = data;
touch->up_id = id;
fprintf(stderr, "test-client: got touch up, id: %d\n", id);
}
static void
touch_handle_motion(void *data, struct wl_touch *wl_touch,
uint32_t time, int32_t id, wl_fixed_t x_w, wl_fixed_t y_w)
{
struct touch *touch = data;
touch->x = wl_fixed_to_int(x_w);
touch->y = wl_fixed_to_int(y_w);
fprintf(stderr, "test-client: got touch motion, %d %d, id: %d\n",
touch->x, touch->y, id);
}
static void
touch_handle_frame(void *data, struct wl_touch *wl_touch)
{
struct touch *touch = data;
++touch->frame_no;
fprintf(stderr, "test-client: got touch frame (%d)\n", touch->frame_no);
}
static void
touch_handle_cancel(void *data, struct wl_touch *wl_touch)
{
struct touch *touch = data;
++touch->cancel_no;
fprintf(stderr, "test-client: got touch cancel (%d)\n", touch->cancel_no);
}
static const struct wl_touch_listener touch_listener = {
touch_handle_down,
touch_handle_up,
touch_handle_motion,
touch_handle_frame,
touch_handle_cancel,
};
static void
surface_enter(void *data,
struct wl_surface *wl_surface, struct wl_output *output)
{
struct surface *surface = data;
surface->output = wl_output_get_user_data(output);
fprintf(stderr, "test-client: got surface enter output %p\n",
surface->output);
}
static void
surface_leave(void *data,
struct wl_surface *wl_surface, struct wl_output *output)
{
struct surface *surface = data;
surface->output = NULL;
fprintf(stderr, "test-client: got surface leave output %p\n",
wl_output_get_user_data(output));
}
static const struct wl_surface_listener surface_listener = {
surface_enter,
surface_leave
};
struct wl_buffer *
create_shm_buffer(struct client *client, int width, int height, void **pixels)
{
struct wl_shm *shm = client->wl_shm;
int stride = width * 4;
int size = stride * height;
struct wl_shm_pool *pool;
struct wl_buffer *buffer;
int fd;
void *data;
fd = os_create_anonymous_file(size);
assert(fd >= 0);
data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (data == MAP_FAILED) {
close(fd);
assert(data != MAP_FAILED);
}
pool = wl_shm_create_pool(shm, fd, size);
buffer = wl_shm_pool_create_buffer(pool, 0, width, height, stride,
WL_SHM_FORMAT_ARGB8888);
wl_shm_pool_destroy(pool);
close(fd);
if (pixels)
*pixels = data;
return buffer;
}
static void
shm_format(void *data, struct wl_shm *wl_shm, uint32_t format)
{
struct client *client = data;
if (format == WL_SHM_FORMAT_ARGB8888)
client->has_argb = 1;
}
struct wl_shm_listener shm_listener = {
shm_format
};
static void
test_handle_pointer_position(void *data, struct weston_test *weston_test,
wl_fixed_t x, wl_fixed_t y)
{
struct test *test = data;
test->pointer_x = wl_fixed_to_int(x);
test->pointer_y = wl_fixed_to_int(y);
fprintf(stderr, "test-client: got global pointer %d %d\n",
test->pointer_x, test->pointer_y);
}
static void
test_handle_n_egl_buffers(void *data, struct weston_test *weston_test, uint32_t n)
{
struct test *test = data;
test->n_egl_buffers = n;
}
static void
test_handle_capture_screenshot_done(void *data, struct weston_test *weston_test)
{
struct test *test = data;
printf("Screenshot has been captured\n");
test->buffer_copy_done = 1;
}
static const struct weston_test_listener test_listener = {
test_handle_pointer_position,
test_handle_n_egl_buffers,
test_handle_capture_screenshot_done,
};
static void
input_update_devices(struct input *input)
{
struct pointer *pointer;
struct keyboard *keyboard;
struct touch *touch;
struct wl_seat *seat = input->wl_seat;
enum wl_seat_capability caps = input->caps;
if ((caps & WL_SEAT_CAPABILITY_POINTER) && !input->pointer) {
pointer = xzalloc(sizeof *pointer);
pointer->wl_pointer = wl_seat_get_pointer(seat);
wl_pointer_set_user_data(pointer->wl_pointer, pointer);
wl_pointer_add_listener(pointer->wl_pointer, &pointer_listener,
pointer);
input->pointer = pointer;
} else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && input->pointer) {
wl_pointer_destroy(input->pointer->wl_pointer);
free(input->pointer);
input->pointer = NULL;
}
if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !input->keyboard) {
keyboard = xzalloc(sizeof *keyboard);
keyboard->wl_keyboard = wl_seat_get_keyboard(seat);
wl_keyboard_set_user_data(keyboard->wl_keyboard, keyboard);
wl_keyboard_add_listener(keyboard->wl_keyboard, &keyboard_listener,
keyboard);
input->keyboard = keyboard;
} else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && input->keyboard) {
wl_keyboard_destroy(input->keyboard->wl_keyboard);
free(input->keyboard);
input->keyboard = NULL;
}
if ((caps & WL_SEAT_CAPABILITY_TOUCH) && !input->touch) {
touch = xzalloc(sizeof *touch);
touch->wl_touch = wl_seat_get_touch(seat);
wl_touch_set_user_data(touch->wl_touch, touch);
wl_touch_add_listener(touch->wl_touch, &touch_listener,
touch);
input->touch = touch;
} else if (!(caps & WL_SEAT_CAPABILITY_TOUCH) && input->touch) {
wl_touch_destroy(input->touch->wl_touch);
free(input->touch);
input->touch = NULL;
}
}
static void
seat_handle_capabilities(void *data, struct wl_seat *seat,
enum wl_seat_capability caps)
{
struct input *input = data;
input->caps = caps;
/* we will create/update the devices only with the right (test) seat.
* If we haven't discovered which seat is the test seat, just
* store capabilities and bail out */
if(input->seat_name && strcmp(input->seat_name, "test-seat") == 0)
input_update_devices(input);
fprintf(stderr, "test-client: got seat %p capabilities: %x\n",
input, caps);
}
static void
seat_handle_name(void *data, struct wl_seat *seat, const char *name)
{
struct input *input = data;
input->seat_name = strdup(name);
assert(input->seat_name && "No memory");
fprintf(stderr, "test-client: got seat %p name: \'%s\'\n",
input, name);
}
static const struct wl_seat_listener seat_listener = {
seat_handle_capabilities,
seat_handle_name,
};
static void
output_handle_geometry(void *data,
struct wl_output *wl_output,
int x, int y,
int physical_width,
int physical_height,
int subpixel,
const char *make,
const char *model,
int32_t transform)
{
struct output *output = data;
output->x = x;
output->y = y;
}
static void
output_handle_mode(void *data,
struct wl_output *wl_output,
uint32_t flags,
int width,
int height,
int refresh)
{
struct output *output = data;
if (flags & WL_OUTPUT_MODE_CURRENT) {
output->width = width;
output->height = height;
}
}
static void
output_handle_scale(void *data,
struct wl_output *wl_output,
int scale)
{
struct output *output = data;
output->scale = scale;
}
static void
output_handle_done(void *data,
struct wl_output *wl_output)
{
struct output *output = data;
output->initialized = 1;
}
static const struct wl_output_listener output_listener = {
output_handle_geometry,
output_handle_mode,
output_handle_done,
output_handle_scale,
};
static void
handle_global(void *data, struct wl_registry *registry,
uint32_t id, const char *interface, uint32_t version)
{
struct client *client = data;
struct output *output;
struct test *test;
struct global *global;
struct input *input;
global = xzalloc(sizeof *global);
global->name = id;
global->interface = strdup(interface);
assert(interface);
global->version = version;
wl_list_insert(client->global_list.prev, &global->link);
if (strcmp(interface, "wl_compositor") == 0) {
client->wl_compositor =
wl_registry_bind(registry, id,
&wl_compositor_interface, version);
} else if (strcmp(interface, "wl_seat") == 0) {
input = xzalloc(sizeof *input);
input->wl_seat =
wl_registry_bind(registry, id,
&wl_seat_interface, version);
wl_seat_add_listener(input->wl_seat, &seat_listener, input);
wl_list_insert(&client->inputs, &input->link);
} else if (strcmp(interface, "wl_shm") == 0) {
client->wl_shm =
wl_registry_bind(registry, id,
&wl_shm_interface, version);
wl_shm_add_listener(client->wl_shm, &shm_listener, client);
} else if (strcmp(interface, "wl_output") == 0) {
output = xzalloc(sizeof *output);
output->wl_output =
wl_registry_bind(registry, id,
&wl_output_interface, version);
wl_output_add_listener(output->wl_output,
&output_listener, output);
client->output = output;
} else if (strcmp(interface, "weston_test") == 0) {
test = xzalloc(sizeof *test);
test->weston_test =
wl_registry_bind(registry, id,
&weston_test_interface, version);
weston_test_add_listener(test->weston_test, &test_listener, test);
client->test = test;
} else if (strcmp(interface, "wl_drm") == 0) {
client->has_wl_drm = true;
}
}
static const struct wl_registry_listener registry_listener = {
handle_global
};
void
skip(const char *fmt, ...)
{
va_list argp;
va_start(argp, fmt);
vfprintf(stderr, fmt, argp);
va_end(argp);
/* automake tests uses exit code 77. weston-test-runner will see
* this and use it, and then weston-test's sigchld handler (in the
* weston process) will use that as an exit status, which is what
* automake will see in the end. */
exit(77);
}
void
expect_protocol_error(struct client *client,
const struct wl_interface *intf,
uint32_t code)
{
int err;
uint32_t errcode, failed = 0;
const struct wl_interface *interface;
unsigned int id;
/* if the error has not come yet, make it happen */
wl_display_roundtrip(client->wl_display);
err = wl_display_get_error(client->wl_display);
assert(err && "Expected protocol error but nothing came");
assert(err == EPROTO && "Expected protocol error but got local error");
errcode = wl_display_get_protocol_error(client->wl_display,
&interface, &id);
/* check error */
if (errcode != code) {
fprintf(stderr, "Should get error code %d but got %d\n",
code, errcode);
failed = 1;
}
/* this should be definitely set */
assert(interface);
if (strcmp(intf->name, interface->name) != 0) {
fprintf(stderr, "Should get interface '%s' but got '%s'\n",
intf->name, interface->name);
failed = 1;
}
if (failed) {
fprintf(stderr, "Expected other protocol error\n");
abort();
}
/* all OK */
fprintf(stderr, "Got expected protocol error on '%s' (object id: %d) "
"with code %d\n", interface->name, id, errcode);
}
static void
log_handler(const char *fmt, va_list args)
{
fprintf(stderr, "libwayland: ");
vfprintf(stderr, fmt, args);
}
static void
input_destroy(struct input *inp)
{
wl_list_remove(&inp->link);
wl_seat_destroy(inp->wl_seat);
free(inp);
}
/* find the test-seat and set it in client.
* Destroy other inputs */
static void
client_set_input(struct client *cl)
{
struct input *inp, *inptmp;
wl_list_for_each_safe(inp, inptmp, &cl->inputs, link) {
assert(inp->seat_name && "BUG: input with no name");
if (strcmp(inp->seat_name, "test-seat") == 0) {
cl->input = inp;
input_update_devices(inp);
} else {
input_destroy(inp);
}
}
/* we keep only one input */
assert(wl_list_length(&cl->inputs) == 1);
}
struct client *
create_client(void)
{
struct client *client;
wl_log_set_handler_client(log_handler);
/* connect to display */
client = xzalloc(sizeof *client);
client->wl_display = wl_display_connect(NULL);
assert(client->wl_display);
wl_list_init(&client->global_list);
wl_list_init(&client->inputs);
/* setup registry so we can bind to interfaces */
client->wl_registry = wl_display_get_registry(client->wl_display);
wl_registry_add_listener(client->wl_registry, &registry_listener,
client);
/* this roundtrip makes sure we have all globals and we bound to them */
client_roundtrip(client);
/* this roundtrip makes sure we got all wl_shm.format and wl_seat.*
* events */
client_roundtrip(client);
/* find the right input for us */
client_set_input(client);
/* must have WL_SHM_FORMAT_ARGB32 */
assert(client->has_argb);
/* must have weston_test interface */
assert(client->test);
/* must have an output */
assert(client->output);
/* the output must be initialized */
assert(client->output->initialized == 1);
/* must have seat set */
assert(client->input);
return client;
}
struct client *
create_client_and_test_surface(int x, int y, int width, int height)
{
struct client *client;
struct surface *surface;
client = create_client();
/* initialize the client surface */
surface = xzalloc(sizeof *surface);
surface->wl_surface =
wl_compositor_create_surface(client->wl_compositor);
assert(surface->wl_surface);
wl_surface_add_listener(surface->wl_surface, &surface_listener,
surface);
client->surface = surface;
wl_surface_set_user_data(surface->wl_surface, surface);
surface->width = width;
surface->height = height;
surface->wl_buffer = create_shm_buffer(client, width, height,
&surface->data);
memset(surface->data, 64, width * height * 4);
move_client(client, x, y);
return client;
}
static const char*
output_path(void)
{
char *path = getenv("WESTON_TEST_OUTPUT_PATH");
if (!path)
return ".";
return path;
}
char*
screenshot_output_filename(const char *basename, uint32_t seq)
{
char *filename;
if (asprintf(&filename, "%s/%s-%02d.png",
output_path(), basename, seq) < 0)
return NULL;
return filename;
}
static const char*
reference_path(void)
{
char *path = getenv("WESTON_TEST_REFERENCE_PATH");
if (!path)
return "./tests/reference";
return path;
}
char*
screenshot_reference_filename(const char *basename, uint32_t seq)
{
char *filename;
if (asprintf(&filename, "%s/%s-%02d.png",
reference_path(), basename, seq) < 0)
return NULL;
return filename;
}
/**
* check_surfaces_geometry() - verifies two surfaces are same size
*
* @returns true if surfaces have the same width and height, or false
* if not, or if there is no actual data.
*/
bool
check_surfaces_geometry(const struct surface *a, const struct surface *b)
{
if (a == NULL || b == NULL) {
printf("Undefined surfaces\n");
return false;
}
else if (a->data == NULL || b->data == NULL) {
printf("Undefined data\n");
return false;
}
else if (a->width != b->width || a->height != b->height) {
printf("Mismatched dimensions: %d,%d != %d,%d\n",
a->width, a->height, b->width, b->height);
return false;
}
return true;
}
/**
* check_surfaces_equal() - tests if two surfaces are pixel-identical
*
* Returns true if surface buffers have all the same byte values,
* false if the surfaces don't match or can't be compared due to
* different dimensions.
*/
bool
check_surfaces_equal(const struct surface *a, const struct surface *b)
{
int bpp = 4; /* Assumes ARGB */
if (!check_surfaces_geometry(a, b))
return false;
return (memcmp(a->data, b->data, bpp * a->width * a->height) == 0);
}
/**
* check_surfaces_match_in_clip() - tests if a given region within two
* surfaces are pixel-identical.
*
* Returns true if the two surfaces have the same byte values within the
* given clipping region, or false if they don't match or the surfaces
* can't be compared.
*/
bool
check_surfaces_match_in_clip(const struct surface *a, const struct surface *b, const struct rectangle *clip_rect)
{
int i, j;
int x0, y0, x1, y1;
void *p, *q;
int bpp = 4; /* Assumes ARGB */
if (!check_surfaces_geometry(a, b) || clip_rect == NULL)
return false;
if (clip_rect->x > a->width || clip_rect->y > a->height) {
printf("Clip outside image boundaries\n");
return true;
}
x0 = max(0, clip_rect->x);
y0 = max(0, clip_rect->y);
x1 = min(a->width, clip_rect->x + clip_rect->width);
y1 = min(a->height, clip_rect->y + clip_rect->height);
if (x0 == x1 || y0 == y1) {
printf("Degenerate comparison\n");
return true;
}
printf("Bytewise comparison inside clip\n");
for (i=y0; i<y1; i++) {
p = a->data + i * a->width * bpp + x0 * bpp;
q = b->data + i * b->width * bpp + x0 * bpp;
if (memcmp(p, q, (x1-x0)*bpp) != 0) {
/* Dump the bad row */
printf("Mismatched image on row %d\n", i);
for (j=0; j<(x1-x0)*bpp; j++) {
char a_char = *((char*)(p+j*bpp));
char b_char = *((char*)(q+j*bpp));
printf("%d,%d: %8x %8x %s\n", i, j, a_char, b_char,
(a_char != b_char)? " <---": "");
}
return false;
}
}
return true;
}