1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "test.h"
#define MAX_DELTA 3
int pixel_difference(uint32_t a, uint32_t b)
{
int max = 0;
int i;
for (i = 0; i < 32; i += 8) {
uint8_t ac = (a >> i) & 0xff;
uint8_t bc = (b >> i) & 0xff;
int d;
if (ac > bc)
d = ac - bc;
else
d = bc - ac;
if (d > max)
max = d;
}
return max;
}
static void
show_pixels(char *buf,
const XImage *real, const XImage *ref,
int x, int y, int w, int h)
{
int i, j, len = 0;
for (j = y - 2; j <= y + 2; j++) {
if (j < 0 || j >= h)
continue;
for (i = x - 2; i <= x + 2; i++) {
if (i < 0 || i >= w)
continue;
len += sprintf(buf+len,
"%08x ",
*(uint32_t*)(real->data +
j*real->bytes_per_line +
i*real->bits_per_pixel/8));
}
len += sprintf(buf+len, "\t");
for (i = x - 2; i <= x + 2; i++) {
if (i < 0 || i >= w)
continue;
len += sprintf(buf+len,
"%08x ",
*(uint32_t*)(ref->data +
j*real->bytes_per_line +
i*real->bits_per_pixel/8));
}
len += sprintf(buf+len, "\n");
}
}
static void test_compare_fallback(struct test *t,
Drawable real_draw, XRenderPictFormat *real_format,
Drawable ref_draw, XRenderPictFormat *ref_format,
int x, int y, int w, int h)
{
XImage *real_image, *ref_image;
char *real, *ref;
char buf[600];
uint32_t mask;
int i, j;
die_unless(real_format->depth == ref_format->depth);
real_image = XGetImage(t->real.dpy, real_draw,
x, y, w, h,
AllPlanes, ZPixmap);
real = real_image->data;
ref_image = XGetImage(t->ref.dpy, ref_draw,
x, y, w, h,
AllPlanes, ZPixmap);
ref = ref_image->data;
mask = depth_mask(real_image->depth);
/* Start with an exact comparison. However, one quicky desires
* a fuzzy comparator to hide hardware inaccuracies...
*/
for (j = 0; j < h; j++) {
for (i = 0; i < w; i++) {
uint32_t a = ((uint32_t *)real)[i] & mask;
uint32_t b = ((uint32_t *)ref)[i] & mask;
if (a != b && pixel_difference(a, b) > MAX_DELTA) {
show_pixels(buf,
real_image, ref_image,
i, j, w, h);
die("discrepancy found at (%d+%d, %d+%d): found %08x, expected %08x (delta: %d)\n%s",
x,i, y,j, a, b, pixel_difference(a, b), buf);
}
}
real += real_image->bytes_per_line;
ref += ref_image->bytes_per_line;
}
XDestroyImage(real_image);
XDestroyImage(ref_image);
}
void test_compare(struct test *t,
Drawable real_draw, XRenderPictFormat *real_format,
Drawable ref_draw, XRenderPictFormat *ref_format,
int x, int y, int w, int h)
{
XImage real_image, ref_image;
Pixmap tmp;
char *real, *ref;
char buf[600];
uint32_t mask;
int i, j;
XGCValues gcv;
GC gc;
if (w * h * 4 > t->real.max_shm_size)
return test_compare_fallback(t,
real_draw, real_format,
ref_draw, ref_format,
x, y, w, h);
test_init_image(&real_image, &t->real.shm, real_format, w, h);
test_init_image(&ref_image, &t->ref.shm, ref_format, w, h);
gcv.graphics_exposures = 0;
die_unless(real_image.depth == ref_image.depth);
die_unless(real_image.bits_per_pixel == ref_image.bits_per_pixel);
die_unless(real_image.bits_per_pixel == 32);
mask = depth_mask(real_image.depth);
tmp = XCreatePixmap(t->real.dpy, real_draw, w, h, real_image.depth);
gc = XCreateGC(t->real.dpy, tmp, GCGraphicsExposures, &gcv);
XCopyArea(t->real.dpy, real_draw, tmp, gc, x, y, w, h, 0, 0);
XShmGetImage(t->real.dpy, tmp, &real_image, 0, 0, AllPlanes);
XFreeGC(t->real.dpy, gc);
XFreePixmap(t->real.dpy, tmp);
real = real_image.data;
tmp = XCreatePixmap(t->ref.dpy, ref_draw, w, h, ref_image.depth);
gc = XCreateGC(t->ref.dpy, tmp, GCGraphicsExposures, &gcv);
XCopyArea(t->ref.dpy, ref_draw, tmp, gc, x, y, w, h, 0, 0);
XShmGetImage(t->ref.dpy, tmp, &ref_image, 0, 0, AllPlanes);
XFreeGC(t->ref.dpy, gc);
XFreePixmap(t->ref.dpy, tmp);
ref = ref_image.data;
/* Start with an exact comparison. However, one quicky desires
* a fuzzy comparator to hide hardware inaccuracies...
*/
for (j = 0; j < h; j++) {
for (i = 0; i < w; i++) {
uint32_t a = ((uint32_t *)real)[i] & mask;
uint32_t b = ((uint32_t *)ref)[i] & mask;
if (a != b && pixel_difference(a, b) > MAX_DELTA) {
show_pixels(buf,
&real_image, &ref_image,
i, j, w, h);
die("discrepancy found at (%d+%d, %d+%d): found %08x, expected %08x (delta: %d)\n%s",
x,i, y,j, a, b, pixel_difference(a, b), buf);
}
}
real += real_image.bytes_per_line;
ref += ref_image.bytes_per_line;
}
}
static int
_native_byte_order_lsb(void)
{
int x = 1;
return *((char *) &x) == 1;
}
void
test_init_image(XImage *ximage,
XShmSegmentInfo *shm,
XRenderPictFormat *format,
int width, int height)
{
int native_byte_order = _native_byte_order_lsb() ? LSBFirst : MSBFirst;
ximage->width = width;
ximage->height = height;
ximage->format = ZPixmap;
ximage->data = shm->shmaddr;
ximage->obdata = (void *)shm;
ximage->byte_order = native_byte_order;
ximage->bitmap_unit = 32;
ximage->bitmap_bit_order = native_byte_order;
ximage->bitmap_pad = 32;
ximage->depth = format->depth;
ximage->bytes_per_line = 4*width;
ximage->bits_per_pixel = 32;
ximage->red_mask = 0xff << 16;
ximage->green_mask = 0xff << 8;
ximage->blue_mask = 0xff << 0;
ximage->xoffset = 0;
XInitImage(ximage);
}
|
