root / pflib.c @ 45724d6d
History | View | Annotate | Download (6.7 kB)
1 | d6d94fc3 | Gerd Hoffmann | /*
|
---|---|---|---|
2 | d6d94fc3 | Gerd Hoffmann | * PixelFormat conversion library.
|
3 | d6d94fc3 | Gerd Hoffmann | *
|
4 | d6d94fc3 | Gerd Hoffmann | * Author: Gerd Hoffmann <kraxel@redhat.com>
|
5 | d6d94fc3 | Gerd Hoffmann | *
|
6 | d6d94fc3 | Gerd Hoffmann | * This work is licensed under the terms of the GNU GPL, version 2. See
|
7 | d6d94fc3 | Gerd Hoffmann | * the COPYING file in the top-level directory.
|
8 | d6d94fc3 | Gerd Hoffmann | *
|
9 | 6b620ca3 | Paolo Bonzini | * Contributions after 2012-01-13 are licensed under the terms of the
|
10 | 6b620ca3 | Paolo Bonzini | * GNU GPL, version 2 or (at your option) any later version.
|
11 | d6d94fc3 | Gerd Hoffmann | */
|
12 | d6d94fc3 | Gerd Hoffmann | #include "qemu-common.h" |
13 | d6d94fc3 | Gerd Hoffmann | #include "console.h" |
14 | d6d94fc3 | Gerd Hoffmann | #include "pflib.h" |
15 | d6d94fc3 | Gerd Hoffmann | |
16 | d6d94fc3 | Gerd Hoffmann | typedef struct QemuPixel QemuPixel; |
17 | d6d94fc3 | Gerd Hoffmann | |
18 | d6d94fc3 | Gerd Hoffmann | typedef void (*pf_convert)(QemuPfConv *conv, |
19 | d6d94fc3 | Gerd Hoffmann | void *dst, void *src, uint32_t cnt); |
20 | d6d94fc3 | Gerd Hoffmann | typedef void (*pf_convert_from)(PixelFormat *pf, |
21 | d6d94fc3 | Gerd Hoffmann | QemuPixel *dst, void *src, uint32_t cnt);
|
22 | d6d94fc3 | Gerd Hoffmann | typedef void (*pf_convert_to)(PixelFormat *pf, |
23 | d6d94fc3 | Gerd Hoffmann | void *dst, QemuPixel *src, uint32_t cnt);
|
24 | d6d94fc3 | Gerd Hoffmann | |
25 | d6d94fc3 | Gerd Hoffmann | struct QemuPfConv {
|
26 | d6d94fc3 | Gerd Hoffmann | pf_convert convert; |
27 | d6d94fc3 | Gerd Hoffmann | PixelFormat src; |
28 | d6d94fc3 | Gerd Hoffmann | PixelFormat dst; |
29 | d6d94fc3 | Gerd Hoffmann | |
30 | d6d94fc3 | Gerd Hoffmann | /* for copy_generic() */
|
31 | d6d94fc3 | Gerd Hoffmann | pf_convert_from conv_from; |
32 | d6d94fc3 | Gerd Hoffmann | pf_convert_to conv_to; |
33 | d6d94fc3 | Gerd Hoffmann | QemuPixel *conv_buf; |
34 | d6d94fc3 | Gerd Hoffmann | uint32_t conv_cnt; |
35 | d6d94fc3 | Gerd Hoffmann | }; |
36 | d6d94fc3 | Gerd Hoffmann | |
37 | d6d94fc3 | Gerd Hoffmann | struct QemuPixel {
|
38 | d6d94fc3 | Gerd Hoffmann | uint8_t red; |
39 | d6d94fc3 | Gerd Hoffmann | uint8_t green; |
40 | d6d94fc3 | Gerd Hoffmann | uint8_t blue; |
41 | d6d94fc3 | Gerd Hoffmann | uint8_t alpha; |
42 | d6d94fc3 | Gerd Hoffmann | }; |
43 | d6d94fc3 | Gerd Hoffmann | |
44 | d6d94fc3 | Gerd Hoffmann | /* ----------------------------------------------------------------------- */
|
45 | d6d94fc3 | Gerd Hoffmann | /* PixelFormat -> QemuPixel conversions */
|
46 | d6d94fc3 | Gerd Hoffmann | |
47 | d6d94fc3 | Gerd Hoffmann | static void conv_16_to_pixel(PixelFormat *pf, |
48 | d6d94fc3 | Gerd Hoffmann | QemuPixel *dst, void *src, uint32_t cnt)
|
49 | d6d94fc3 | Gerd Hoffmann | { |
50 | d6d94fc3 | Gerd Hoffmann | uint16_t *src16 = src; |
51 | d6d94fc3 | Gerd Hoffmann | |
52 | d6d94fc3 | Gerd Hoffmann | while (cnt > 0) { |
53 | d6d94fc3 | Gerd Hoffmann | dst->red = ((*src16 & pf->rmask) >> pf->rshift) << (8 - pf->rbits);
|
54 | d6d94fc3 | Gerd Hoffmann | dst->green = ((*src16 & pf->gmask) >> pf->gshift) << (8 - pf->gbits);
|
55 | d6d94fc3 | Gerd Hoffmann | dst->blue = ((*src16 & pf->bmask) >> pf->bshift) << (8 - pf->bbits);
|
56 | d6d94fc3 | Gerd Hoffmann | dst->alpha = ((*src16 & pf->amask) >> pf->ashift) << (8 - pf->abits);
|
57 | d6d94fc3 | Gerd Hoffmann | dst++, src16++, cnt--; |
58 | d6d94fc3 | Gerd Hoffmann | } |
59 | d6d94fc3 | Gerd Hoffmann | } |
60 | d6d94fc3 | Gerd Hoffmann | |
61 | d6d94fc3 | Gerd Hoffmann | /* assumes pf->{r,g,b,a}bits == 8 */
|
62 | d6d94fc3 | Gerd Hoffmann | static void conv_32_to_pixel_fast(PixelFormat *pf, |
63 | d6d94fc3 | Gerd Hoffmann | QemuPixel *dst, void *src, uint32_t cnt)
|
64 | d6d94fc3 | Gerd Hoffmann | { |
65 | d6d94fc3 | Gerd Hoffmann | uint32_t *src32 = src; |
66 | d6d94fc3 | Gerd Hoffmann | |
67 | d6d94fc3 | Gerd Hoffmann | while (cnt > 0) { |
68 | d6d94fc3 | Gerd Hoffmann | dst->red = (*src32 & pf->rmask) >> pf->rshift; |
69 | d6d94fc3 | Gerd Hoffmann | dst->green = (*src32 & pf->gmask) >> pf->gshift; |
70 | d6d94fc3 | Gerd Hoffmann | dst->blue = (*src32 & pf->bmask) >> pf->bshift; |
71 | d6d94fc3 | Gerd Hoffmann | dst->alpha = (*src32 & pf->amask) >> pf->ashift; |
72 | d6d94fc3 | Gerd Hoffmann | dst++, src32++, cnt--; |
73 | d6d94fc3 | Gerd Hoffmann | } |
74 | d6d94fc3 | Gerd Hoffmann | } |
75 | d6d94fc3 | Gerd Hoffmann | |
76 | d6d94fc3 | Gerd Hoffmann | static void conv_32_to_pixel_generic(PixelFormat *pf, |
77 | d6d94fc3 | Gerd Hoffmann | QemuPixel *dst, void *src, uint32_t cnt)
|
78 | d6d94fc3 | Gerd Hoffmann | { |
79 | d6d94fc3 | Gerd Hoffmann | uint32_t *src32 = src; |
80 | d6d94fc3 | Gerd Hoffmann | |
81 | d6d94fc3 | Gerd Hoffmann | while (cnt > 0) { |
82 | d6d94fc3 | Gerd Hoffmann | if (pf->rbits < 8) { |
83 | d6d94fc3 | Gerd Hoffmann | dst->red = ((*src32 & pf->rmask) >> pf->rshift) << (8 - pf->rbits);
|
84 | d6d94fc3 | Gerd Hoffmann | } else {
|
85 | d6d94fc3 | Gerd Hoffmann | dst->red = ((*src32 & pf->rmask) >> pf->rshift) >> (pf->rbits - 8);
|
86 | d6d94fc3 | Gerd Hoffmann | } |
87 | d6d94fc3 | Gerd Hoffmann | if (pf->gbits < 8) { |
88 | d6d94fc3 | Gerd Hoffmann | dst->green = ((*src32 & pf->gmask) >> pf->gshift) << (8 - pf->gbits);
|
89 | d6d94fc3 | Gerd Hoffmann | } else {
|
90 | d6d94fc3 | Gerd Hoffmann | dst->green = ((*src32 & pf->gmask) >> pf->gshift) >> (pf->gbits - 8);
|
91 | d6d94fc3 | Gerd Hoffmann | } |
92 | d6d94fc3 | Gerd Hoffmann | if (pf->bbits < 8) { |
93 | d6d94fc3 | Gerd Hoffmann | dst->blue = ((*src32 & pf->bmask) >> pf->bshift) << (8 - pf->bbits);
|
94 | d6d94fc3 | Gerd Hoffmann | } else {
|
95 | d6d94fc3 | Gerd Hoffmann | dst->blue = ((*src32 & pf->bmask) >> pf->bshift) >> (pf->bbits - 8);
|
96 | d6d94fc3 | Gerd Hoffmann | } |
97 | d6d94fc3 | Gerd Hoffmann | if (pf->abits < 8) { |
98 | d6d94fc3 | Gerd Hoffmann | dst->alpha = ((*src32 & pf->amask) >> pf->ashift) << (8 - pf->abits);
|
99 | d6d94fc3 | Gerd Hoffmann | } else {
|
100 | d6d94fc3 | Gerd Hoffmann | dst->alpha = ((*src32 & pf->amask) >> pf->ashift) >> (pf->abits - 8);
|
101 | d6d94fc3 | Gerd Hoffmann | } |
102 | d6d94fc3 | Gerd Hoffmann | dst++, src32++, cnt--; |
103 | d6d94fc3 | Gerd Hoffmann | } |
104 | d6d94fc3 | Gerd Hoffmann | } |
105 | d6d94fc3 | Gerd Hoffmann | |
106 | d6d94fc3 | Gerd Hoffmann | /* ----------------------------------------------------------------------- */
|
107 | d6d94fc3 | Gerd Hoffmann | /* QemuPixel -> PixelFormat conversions */
|
108 | d6d94fc3 | Gerd Hoffmann | |
109 | d6d94fc3 | Gerd Hoffmann | static void conv_pixel_to_16(PixelFormat *pf, |
110 | d6d94fc3 | Gerd Hoffmann | void *dst, QemuPixel *src, uint32_t cnt)
|
111 | d6d94fc3 | Gerd Hoffmann | { |
112 | d6d94fc3 | Gerd Hoffmann | uint16_t *dst16 = dst; |
113 | d6d94fc3 | Gerd Hoffmann | |
114 | d6d94fc3 | Gerd Hoffmann | while (cnt > 0) { |
115 | d6d94fc3 | Gerd Hoffmann | *dst16 = ((uint16_t)src->red >> (8 - pf->rbits)) << pf->rshift;
|
116 | d6d94fc3 | Gerd Hoffmann | *dst16 |= ((uint16_t)src->green >> (8 - pf->gbits)) << pf->gshift;
|
117 | d6d94fc3 | Gerd Hoffmann | *dst16 |= ((uint16_t)src->blue >> (8 - pf->bbits)) << pf->bshift;
|
118 | d6d94fc3 | Gerd Hoffmann | *dst16 |= ((uint16_t)src->alpha >> (8 - pf->abits)) << pf->ashift;
|
119 | d6d94fc3 | Gerd Hoffmann | dst16++, src++, cnt--; |
120 | d6d94fc3 | Gerd Hoffmann | } |
121 | d6d94fc3 | Gerd Hoffmann | } |
122 | d6d94fc3 | Gerd Hoffmann | |
123 | d6d94fc3 | Gerd Hoffmann | static void conv_pixel_to_32(PixelFormat *pf, |
124 | d6d94fc3 | Gerd Hoffmann | void *dst, QemuPixel *src, uint32_t cnt)
|
125 | d6d94fc3 | Gerd Hoffmann | { |
126 | d6d94fc3 | Gerd Hoffmann | uint32_t *dst32 = dst; |
127 | d6d94fc3 | Gerd Hoffmann | |
128 | d6d94fc3 | Gerd Hoffmann | while (cnt > 0) { |
129 | d6d94fc3 | Gerd Hoffmann | *dst32 = ((uint32_t)src->red >> (8 - pf->rbits)) << pf->rshift;
|
130 | d6d94fc3 | Gerd Hoffmann | *dst32 |= ((uint32_t)src->green >> (8 - pf->gbits)) << pf->gshift;
|
131 | d6d94fc3 | Gerd Hoffmann | *dst32 |= ((uint32_t)src->blue >> (8 - pf->bbits)) << pf->bshift;
|
132 | d6d94fc3 | Gerd Hoffmann | *dst32 |= ((uint32_t)src->alpha >> (8 - pf->abits)) << pf->ashift;
|
133 | d6d94fc3 | Gerd Hoffmann | dst32++, src++, cnt--; |
134 | d6d94fc3 | Gerd Hoffmann | } |
135 | d6d94fc3 | Gerd Hoffmann | } |
136 | d6d94fc3 | Gerd Hoffmann | |
137 | d6d94fc3 | Gerd Hoffmann | /* ----------------------------------------------------------------------- */
|
138 | d6d94fc3 | Gerd Hoffmann | /* PixelFormat -> PixelFormat conversions */
|
139 | d6d94fc3 | Gerd Hoffmann | |
140 | d6d94fc3 | Gerd Hoffmann | static void convert_copy(QemuPfConv *conv, void *dst, void *src, uint32_t cnt) |
141 | d6d94fc3 | Gerd Hoffmann | { |
142 | d6d94fc3 | Gerd Hoffmann | uint32_t bytes = cnt * conv->src.bytes_per_pixel; |
143 | d6d94fc3 | Gerd Hoffmann | memcpy(dst, src, bytes); |
144 | d6d94fc3 | Gerd Hoffmann | } |
145 | d6d94fc3 | Gerd Hoffmann | |
146 | d6d94fc3 | Gerd Hoffmann | static void convert_generic(QemuPfConv *conv, void *dst, void *src, uint32_t cnt) |
147 | d6d94fc3 | Gerd Hoffmann | { |
148 | d6d94fc3 | Gerd Hoffmann | if (conv->conv_cnt < cnt) {
|
149 | d6d94fc3 | Gerd Hoffmann | conv->conv_cnt = cnt; |
150 | 7267c094 | Anthony Liguori | conv->conv_buf = g_realloc(conv->conv_buf, sizeof(QemuPixel) * conv->conv_cnt);
|
151 | d6d94fc3 | Gerd Hoffmann | } |
152 | d6d94fc3 | Gerd Hoffmann | conv->conv_from(&conv->src, conv->conv_buf, src, cnt); |
153 | d6d94fc3 | Gerd Hoffmann | conv->conv_to(&conv->dst, dst, conv->conv_buf, cnt); |
154 | d6d94fc3 | Gerd Hoffmann | } |
155 | d6d94fc3 | Gerd Hoffmann | |
156 | d6d94fc3 | Gerd Hoffmann | /* ----------------------------------------------------------------------- */
|
157 | d6d94fc3 | Gerd Hoffmann | /* public interface */
|
158 | d6d94fc3 | Gerd Hoffmann | |
159 | d6d94fc3 | Gerd Hoffmann | QemuPfConv *qemu_pf_conv_get(PixelFormat *dst, PixelFormat *src) |
160 | d6d94fc3 | Gerd Hoffmann | { |
161 | 7267c094 | Anthony Liguori | QemuPfConv *conv = g_malloc0(sizeof(QemuPfConv));
|
162 | d6d94fc3 | Gerd Hoffmann | |
163 | d6d94fc3 | Gerd Hoffmann | conv->src = *src; |
164 | d6d94fc3 | Gerd Hoffmann | conv->dst = *dst; |
165 | d6d94fc3 | Gerd Hoffmann | |
166 | d6d94fc3 | Gerd Hoffmann | if (memcmp(&conv->src, &conv->dst, sizeof(PixelFormat)) == 0) { |
167 | d6d94fc3 | Gerd Hoffmann | /* formats identical, can simply copy */
|
168 | d6d94fc3 | Gerd Hoffmann | conv->convert = convert_copy; |
169 | d6d94fc3 | Gerd Hoffmann | } else {
|
170 | d6d94fc3 | Gerd Hoffmann | /* generic two-step conversion: src -> QemuPixel -> dst */
|
171 | d6d94fc3 | Gerd Hoffmann | switch (conv->src.bytes_per_pixel) {
|
172 | d6d94fc3 | Gerd Hoffmann | case 2: |
173 | d6d94fc3 | Gerd Hoffmann | conv->conv_from = conv_16_to_pixel; |
174 | d6d94fc3 | Gerd Hoffmann | break;
|
175 | d6d94fc3 | Gerd Hoffmann | case 4: |
176 | d6d94fc3 | Gerd Hoffmann | if (conv->src.rbits == 8 && conv->src.gbits == 8 && conv->src.bbits == 8) { |
177 | d6d94fc3 | Gerd Hoffmann | conv->conv_from = conv_32_to_pixel_fast; |
178 | d6d94fc3 | Gerd Hoffmann | } else {
|
179 | d6d94fc3 | Gerd Hoffmann | conv->conv_from = conv_32_to_pixel_generic; |
180 | d6d94fc3 | Gerd Hoffmann | } |
181 | d6d94fc3 | Gerd Hoffmann | break;
|
182 | d6d94fc3 | Gerd Hoffmann | default:
|
183 | d6d94fc3 | Gerd Hoffmann | goto err;
|
184 | d6d94fc3 | Gerd Hoffmann | } |
185 | d6d94fc3 | Gerd Hoffmann | switch (conv->dst.bytes_per_pixel) {
|
186 | d6d94fc3 | Gerd Hoffmann | case 2: |
187 | d6d94fc3 | Gerd Hoffmann | conv->conv_to = conv_pixel_to_16; |
188 | d6d94fc3 | Gerd Hoffmann | break;
|
189 | d6d94fc3 | Gerd Hoffmann | case 4: |
190 | d6d94fc3 | Gerd Hoffmann | conv->conv_to = conv_pixel_to_32; |
191 | d6d94fc3 | Gerd Hoffmann | break;
|
192 | d6d94fc3 | Gerd Hoffmann | default:
|
193 | d6d94fc3 | Gerd Hoffmann | goto err;
|
194 | d6d94fc3 | Gerd Hoffmann | } |
195 | d6d94fc3 | Gerd Hoffmann | conv->convert = convert_generic; |
196 | d6d94fc3 | Gerd Hoffmann | } |
197 | d6d94fc3 | Gerd Hoffmann | return conv;
|
198 | d6d94fc3 | Gerd Hoffmann | |
199 | d6d94fc3 | Gerd Hoffmann | err:
|
200 | 7267c094 | Anthony Liguori | g_free(conv); |
201 | d6d94fc3 | Gerd Hoffmann | return NULL; |
202 | d6d94fc3 | Gerd Hoffmann | } |
203 | d6d94fc3 | Gerd Hoffmann | |
204 | d6d94fc3 | Gerd Hoffmann | void qemu_pf_conv_run(QemuPfConv *conv, void *dst, void *src, uint32_t cnt) |
205 | d6d94fc3 | Gerd Hoffmann | { |
206 | d6d94fc3 | Gerd Hoffmann | conv->convert(conv, dst, src, cnt); |
207 | d6d94fc3 | Gerd Hoffmann | } |
208 | d6d94fc3 | Gerd Hoffmann | |
209 | d6d94fc3 | Gerd Hoffmann | void qemu_pf_conv_put(QemuPfConv *conv)
|
210 | d6d94fc3 | Gerd Hoffmann | { |
211 | d6d94fc3 | Gerd Hoffmann | if (conv) {
|
212 | 7267c094 | Anthony Liguori | g_free(conv->conv_buf); |
213 | 7267c094 | Anthony Liguori | g_free(conv); |
214 | d6d94fc3 | Gerd Hoffmann | } |
215 | d6d94fc3 | Gerd Hoffmann | } |