|
1 |
/*
|
|
2 |
* PixelFormat conversion library.
|
|
3 |
*
|
|
4 |
* Author: Gerd Hoffmann <kraxel@redhat.com>
|
|
5 |
*
|
|
6 |
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
7 |
* the COPYING file in the top-level directory.
|
|
8 |
*
|
|
9 |
*/
|
|
10 |
#include "qemu-common.h"
|
|
11 |
#include "console.h"
|
|
12 |
#include "pflib.h"
|
|
13 |
|
|
14 |
typedef struct QemuPixel QemuPixel;
|
|
15 |
|
|
16 |
typedef void (*pf_convert)(QemuPfConv *conv,
|
|
17 |
void *dst, void *src, uint32_t cnt);
|
|
18 |
typedef void (*pf_convert_from)(PixelFormat *pf,
|
|
19 |
QemuPixel *dst, void *src, uint32_t cnt);
|
|
20 |
typedef void (*pf_convert_to)(PixelFormat *pf,
|
|
21 |
void *dst, QemuPixel *src, uint32_t cnt);
|
|
22 |
|
|
23 |
struct QemuPfConv {
|
|
24 |
pf_convert convert;
|
|
25 |
PixelFormat src;
|
|
26 |
PixelFormat dst;
|
|
27 |
|
|
28 |
/* for copy_generic() */
|
|
29 |
pf_convert_from conv_from;
|
|
30 |
pf_convert_to conv_to;
|
|
31 |
QemuPixel *conv_buf;
|
|
32 |
uint32_t conv_cnt;
|
|
33 |
};
|
|
34 |
|
|
35 |
struct QemuPixel {
|
|
36 |
uint8_t red;
|
|
37 |
uint8_t green;
|
|
38 |
uint8_t blue;
|
|
39 |
uint8_t alpha;
|
|
40 |
};
|
|
41 |
|
|
42 |
/* ----------------------------------------------------------------------- */
|
|
43 |
/* PixelFormat -> QemuPixel conversions */
|
|
44 |
|
|
45 |
static void conv_16_to_pixel(PixelFormat *pf,
|
|
46 |
QemuPixel *dst, void *src, uint32_t cnt)
|
|
47 |
{
|
|
48 |
uint16_t *src16 = src;
|
|
49 |
|
|
50 |
while (cnt > 0) {
|
|
51 |
dst->red = ((*src16 & pf->rmask) >> pf->rshift) << (8 - pf->rbits);
|
|
52 |
dst->green = ((*src16 & pf->gmask) >> pf->gshift) << (8 - pf->gbits);
|
|
53 |
dst->blue = ((*src16 & pf->bmask) >> pf->bshift) << (8 - pf->bbits);
|
|
54 |
dst->alpha = ((*src16 & pf->amask) >> pf->ashift) << (8 - pf->abits);
|
|
55 |
dst++, src16++, cnt--;
|
|
56 |
}
|
|
57 |
}
|
|
58 |
|
|
59 |
/* assumes pf->{r,g,b,a}bits == 8 */
|
|
60 |
static void conv_32_to_pixel_fast(PixelFormat *pf,
|
|
61 |
QemuPixel *dst, void *src, uint32_t cnt)
|
|
62 |
{
|
|
63 |
uint32_t *src32 = src;
|
|
64 |
|
|
65 |
while (cnt > 0) {
|
|
66 |
dst->red = (*src32 & pf->rmask) >> pf->rshift;
|
|
67 |
dst->green = (*src32 & pf->gmask) >> pf->gshift;
|
|
68 |
dst->blue = (*src32 & pf->bmask) >> pf->bshift;
|
|
69 |
dst->alpha = (*src32 & pf->amask) >> pf->ashift;
|
|
70 |
dst++, src32++, cnt--;
|
|
71 |
}
|
|
72 |
}
|
|
73 |
|
|
74 |
static void conv_32_to_pixel_generic(PixelFormat *pf,
|
|
75 |
QemuPixel *dst, void *src, uint32_t cnt)
|
|
76 |
{
|
|
77 |
uint32_t *src32 = src;
|
|
78 |
|
|
79 |
while (cnt > 0) {
|
|
80 |
if (pf->rbits < 8) {
|
|
81 |
dst->red = ((*src32 & pf->rmask) >> pf->rshift) << (8 - pf->rbits);
|
|
82 |
} else {
|
|
83 |
dst->red = ((*src32 & pf->rmask) >> pf->rshift) >> (pf->rbits - 8);
|
|
84 |
}
|
|
85 |
if (pf->gbits < 8) {
|
|
86 |
dst->green = ((*src32 & pf->gmask) >> pf->gshift) << (8 - pf->gbits);
|
|
87 |
} else {
|
|
88 |
dst->green = ((*src32 & pf->gmask) >> pf->gshift) >> (pf->gbits - 8);
|
|
89 |
}
|
|
90 |
if (pf->bbits < 8) {
|
|
91 |
dst->blue = ((*src32 & pf->bmask) >> pf->bshift) << (8 - pf->bbits);
|
|
92 |
} else {
|
|
93 |
dst->blue = ((*src32 & pf->bmask) >> pf->bshift) >> (pf->bbits - 8);
|
|
94 |
}
|
|
95 |
if (pf->abits < 8) {
|
|
96 |
dst->alpha = ((*src32 & pf->amask) >> pf->ashift) << (8 - pf->abits);
|
|
97 |
} else {
|
|
98 |
dst->alpha = ((*src32 & pf->amask) >> pf->ashift) >> (pf->abits - 8);
|
|
99 |
}
|
|
100 |
dst++, src32++, cnt--;
|
|
101 |
}
|
|
102 |
}
|
|
103 |
|
|
104 |
/* ----------------------------------------------------------------------- */
|
|
105 |
/* QemuPixel -> PixelFormat conversions */
|
|
106 |
|
|
107 |
static void conv_pixel_to_16(PixelFormat *pf,
|
|
108 |
void *dst, QemuPixel *src, uint32_t cnt)
|
|
109 |
{
|
|
110 |
uint16_t *dst16 = dst;
|
|
111 |
|
|
112 |
while (cnt > 0) {
|
|
113 |
*dst16 = ((uint16_t)src->red >> (8 - pf->rbits)) << pf->rshift;
|
|
114 |
*dst16 |= ((uint16_t)src->green >> (8 - pf->gbits)) << pf->gshift;
|
|
115 |
*dst16 |= ((uint16_t)src->blue >> (8 - pf->bbits)) << pf->bshift;
|
|
116 |
*dst16 |= ((uint16_t)src->alpha >> (8 - pf->abits)) << pf->ashift;
|
|
117 |
dst16++, src++, cnt--;
|
|
118 |
}
|
|
119 |
}
|
|
120 |
|
|
121 |
static void conv_pixel_to_32(PixelFormat *pf,
|
|
122 |
void *dst, QemuPixel *src, uint32_t cnt)
|
|
123 |
{
|
|
124 |
uint32_t *dst32 = dst;
|
|
125 |
|
|
126 |
while (cnt > 0) {
|
|
127 |
*dst32 = ((uint32_t)src->red >> (8 - pf->rbits)) << pf->rshift;
|
|
128 |
*dst32 |= ((uint32_t)src->green >> (8 - pf->gbits)) << pf->gshift;
|
|
129 |
*dst32 |= ((uint32_t)src->blue >> (8 - pf->bbits)) << pf->bshift;
|
|
130 |
*dst32 |= ((uint32_t)src->alpha >> (8 - pf->abits)) << pf->ashift;
|
|
131 |
dst32++, src++, cnt--;
|
|
132 |
}
|
|
133 |
}
|
|
134 |
|
|
135 |
/* ----------------------------------------------------------------------- */
|
|
136 |
/* PixelFormat -> PixelFormat conversions */
|
|
137 |
|
|
138 |
static void convert_copy(QemuPfConv *conv, void *dst, void *src, uint32_t cnt)
|
|
139 |
{
|
|
140 |
uint32_t bytes = cnt * conv->src.bytes_per_pixel;
|
|
141 |
memcpy(dst, src, bytes);
|
|
142 |
}
|
|
143 |
|
|
144 |
static void convert_generic(QemuPfConv *conv, void *dst, void *src, uint32_t cnt)
|
|
145 |
{
|
|
146 |
if (conv->conv_cnt < cnt) {
|
|
147 |
conv->conv_cnt = cnt;
|
|
148 |
conv->conv_buf = qemu_realloc(conv->conv_buf, sizeof(QemuPixel) * conv->conv_cnt);
|
|
149 |
}
|
|
150 |
conv->conv_from(&conv->src, conv->conv_buf, src, cnt);
|
|
151 |
conv->conv_to(&conv->dst, dst, conv->conv_buf, cnt);
|
|
152 |
}
|
|
153 |
|
|
154 |
/* ----------------------------------------------------------------------- */
|
|
155 |
/* public interface */
|
|
156 |
|
|
157 |
QemuPfConv *qemu_pf_conv_get(PixelFormat *dst, PixelFormat *src)
|
|
158 |
{
|
|
159 |
QemuPfConv *conv = qemu_mallocz(sizeof(QemuPfConv));
|
|
160 |
|
|
161 |
conv->src = *src;
|
|
162 |
conv->dst = *dst;
|
|
163 |
|
|
164 |
if (memcmp(&conv->src, &conv->dst, sizeof(PixelFormat)) == 0) {
|
|
165 |
/* formats identical, can simply copy */
|
|
166 |
conv->convert = convert_copy;
|
|
167 |
} else {
|
|
168 |
/* generic two-step conversion: src -> QemuPixel -> dst */
|
|
169 |
switch (conv->src.bytes_per_pixel) {
|
|
170 |
case 2:
|
|
171 |
conv->conv_from = conv_16_to_pixel;
|
|
172 |
break;
|
|
173 |
case 4:
|
|
174 |
if (conv->src.rbits == 8 && conv->src.gbits == 8 && conv->src.bbits == 8) {
|
|
175 |
conv->conv_from = conv_32_to_pixel_fast;
|
|
176 |
} else {
|
|
177 |
conv->conv_from = conv_32_to_pixel_generic;
|
|
178 |
}
|
|
179 |
break;
|
|
180 |
default:
|
|
181 |
goto err;
|
|
182 |
}
|
|
183 |
switch (conv->dst.bytes_per_pixel) {
|
|
184 |
case 2:
|
|
185 |
conv->conv_to = conv_pixel_to_16;
|
|
186 |
break;
|
|
187 |
case 4:
|
|
188 |
conv->conv_to = conv_pixel_to_32;
|
|
189 |
break;
|
|
190 |
default:
|
|
191 |
goto err;
|
|
192 |
}
|
|
193 |
conv->convert = convert_generic;
|
|
194 |
}
|
|
195 |
return conv;
|
|
196 |
|
|
197 |
err:
|
|
198 |
qemu_free(conv);
|
|
199 |
return NULL;
|
|
200 |
}
|
|
201 |
|
|
202 |
void qemu_pf_conv_run(QemuPfConv *conv, void *dst, void *src, uint32_t cnt)
|
|
203 |
{
|
|
204 |
conv->convert(conv, dst, src, cnt);
|
|
205 |
}
|
|
206 |
|
|
207 |
void qemu_pf_conv_put(QemuPfConv *conv)
|
|
208 |
{
|
|
209 |
if (conv) {
|
|
210 |
qemu_free(conv->conv_buf);
|
|
211 |
qemu_free(conv);
|
|
212 |
}
|
|
213 |
}
|