cirrus: fix off-by-one in cirrus_bitblt_rop_bkwd_transp_*_16
[qemu.git] / hw / display / cirrus_vga_rop.h
1 /*
2 * QEMU Cirrus CLGD 54xx VGA Emulator.
3 *
4 * Copyright (c) 2004 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 static inline void glue(rop_8_, ROP_NAME)(CirrusVGAState *s,
26 uint32_t dstaddr, uint8_t src)
27 {
28 uint8_t *dst = &s->vga.vram_ptr[dstaddr & s->cirrus_addr_mask];
29 *dst = ROP_FN(*dst, src);
30 }
31
32 static inline void glue(rop_tr_8_, ROP_NAME)(CirrusVGAState *s,
33 uint32_t dstaddr, uint8_t src,
34 uint8_t transp)
35 {
36 uint8_t *dst = &s->vga.vram_ptr[dstaddr & s->cirrus_addr_mask];
37 uint8_t pixel = ROP_FN(*dst, src);
38 if (pixel != transp) {
39 *dst = pixel;
40 }
41 }
42
43 static inline void glue(rop_16_, ROP_NAME)(CirrusVGAState *s,
44 uint32_t dstaddr, uint16_t src)
45 {
46 uint16_t *dst = (uint16_t *)
47 (&s->vga.vram_ptr[dstaddr & s->cirrus_addr_mask & ~1]);
48 *dst = ROP_FN(*dst, src);
49 }
50
51 static inline void glue(rop_tr_16_, ROP_NAME)(CirrusVGAState *s,
52 uint32_t dstaddr, uint16_t src,
53 uint16_t transp)
54 {
55 uint16_t *dst = (uint16_t *)
56 (&s->vga.vram_ptr[dstaddr & s->cirrus_addr_mask & ~1]);
57 uint16_t pixel = ROP_FN(*dst, src);
58 if (pixel != transp) {
59 *dst = pixel;
60 }
61 }
62
63 static inline void glue(rop_32_, ROP_NAME)(CirrusVGAState *s,
64 uint32_t dstaddr, uint32_t src)
65 {
66 uint32_t *dst = (uint32_t *)
67 (&s->vga.vram_ptr[dstaddr & s->cirrus_addr_mask & ~3]);
68 *dst = ROP_FN(*dst, src);
69 }
70
71 #define ROP_OP(st, d, s) glue(rop_8_, ROP_NAME)(st, d, s)
72 #define ROP_OP_TR(st, d, s, t) glue(rop_tr_8_, ROP_NAME)(st, d, s, t)
73 #define ROP_OP_16(st, d, s) glue(rop_16_, ROP_NAME)(st, d, s)
74 #define ROP_OP_TR_16(st, d, s, t) glue(rop_tr_16_, ROP_NAME)(st, d, s, t)
75 #define ROP_OP_32(st, d, s) glue(rop_32_, ROP_NAME)(st, d, s)
76 #undef ROP_FN
77
78 static void
79 glue(cirrus_bitblt_rop_fwd_, ROP_NAME)(CirrusVGAState *s,
80 uint32_t dstaddr,
81 uint32_t srcaddr,
82 int dstpitch, int srcpitch,
83 int bltwidth, int bltheight)
84 {
85 int x,y;
86 dstpitch -= bltwidth;
87 srcpitch -= bltwidth;
88
89 if (bltheight > 1 && (dstpitch < 0 || srcpitch < 0)) {
90 return;
91 }
92
93 for (y = 0; y < bltheight; y++) {
94 for (x = 0; x < bltwidth; x++) {
95 ROP_OP(s, dstaddr, cirrus_src(s, srcaddr));
96 dstaddr++;
97 srcaddr++;
98 }
99 dstaddr += dstpitch;
100 srcaddr += srcpitch;
101 }
102 }
103
104 static void
105 glue(cirrus_bitblt_rop_bkwd_, ROP_NAME)(CirrusVGAState *s,
106 uint32_t dstaddr,
107 uint32_t srcaddr,
108 int dstpitch, int srcpitch,
109 int bltwidth, int bltheight)
110 {
111 int x,y;
112 dstpitch += bltwidth;
113 srcpitch += bltwidth;
114 for (y = 0; y < bltheight; y++) {
115 for (x = 0; x < bltwidth; x++) {
116 ROP_OP(s, dstaddr, cirrus_src(s, srcaddr));
117 dstaddr--;
118 srcaddr--;
119 }
120 dstaddr += dstpitch;
121 srcaddr += srcpitch;
122 }
123 }
124
125 static void
126 glue(glue(cirrus_bitblt_rop_fwd_transp_, ROP_NAME),_8)(CirrusVGAState *s,
127 uint32_t dstaddr,
128 uint32_t srcaddr,
129 int dstpitch,
130 int srcpitch,
131 int bltwidth,
132 int bltheight)
133 {
134 int x,y;
135 uint8_t transp = s->vga.gr[0x34];
136 dstpitch -= bltwidth;
137 srcpitch -= bltwidth;
138
139 if (bltheight > 1 && (dstpitch < 0 || srcpitch < 0)) {
140 return;
141 }
142
143 for (y = 0; y < bltheight; y++) {
144 for (x = 0; x < bltwidth; x++) {
145 ROP_OP_TR(s, dstaddr, cirrus_src(s, srcaddr), transp);
146 dstaddr++;
147 srcaddr++;
148 }
149 dstaddr += dstpitch;
150 srcaddr += srcpitch;
151 }
152 }
153
154 static void
155 glue(glue(cirrus_bitblt_rop_bkwd_transp_, ROP_NAME),_8)(CirrusVGAState *s,
156 uint32_t dstaddr,
157 uint32_t srcaddr,
158 int dstpitch,
159 int srcpitch,
160 int bltwidth,
161 int bltheight)
162 {
163 int x,y;
164 uint8_t transp = s->vga.gr[0x34];
165 dstpitch += bltwidth;
166 srcpitch += bltwidth;
167 for (y = 0; y < bltheight; y++) {
168 for (x = 0; x < bltwidth; x++) {
169 ROP_OP_TR(s, dstaddr, cirrus_src(s, srcaddr), transp);
170 dstaddr--;
171 srcaddr--;
172 }
173 dstaddr += dstpitch;
174 srcaddr += srcpitch;
175 }
176 }
177
178 static void
179 glue(glue(cirrus_bitblt_rop_fwd_transp_, ROP_NAME),_16)(CirrusVGAState *s,
180 uint32_t dstaddr,
181 uint32_t srcaddr,
182 int dstpitch,
183 int srcpitch,
184 int bltwidth,
185 int bltheight)
186 {
187 int x,y;
188 uint16_t transp = s->vga.gr[0x34] | (uint16_t)s->vga.gr[0x35] << 8;
189 dstpitch -= bltwidth;
190 srcpitch -= bltwidth;
191
192 if (bltheight > 1 && (dstpitch < 0 || srcpitch < 0)) {
193 return;
194 }
195
196 for (y = 0; y < bltheight; y++) {
197 for (x = 0; x < bltwidth; x+=2) {
198 ROP_OP_TR_16(s, dstaddr, cirrus_src16(s, srcaddr), transp);
199 dstaddr += 2;
200 srcaddr += 2;
201 }
202 dstaddr += dstpitch;
203 srcaddr += srcpitch;
204 }
205 }
206
207 static void
208 glue(glue(cirrus_bitblt_rop_bkwd_transp_, ROP_NAME),_16)(CirrusVGAState *s,
209 uint32_t dstaddr,
210 uint32_t srcaddr,
211 int dstpitch,
212 int srcpitch,
213 int bltwidth,
214 int bltheight)
215 {
216 int x,y;
217 uint16_t transp = s->vga.gr[0x34] | (uint16_t)s->vga.gr[0x35] << 8;
218 dstpitch += bltwidth;
219 srcpitch += bltwidth;
220 for (y = 0; y < bltheight; y++) {
221 for (x = 0; x < bltwidth; x+=2) {
222 ROP_OP_TR_16(s, dstaddr - 1, cirrus_src16(s, srcaddr - 1), transp);
223 dstaddr -= 2;
224 srcaddr -= 2;
225 }
226 dstaddr += dstpitch;
227 srcaddr += srcpitch;
228 }
229 }
230
231 #define DEPTH 8
232 #include "cirrus_vga_rop2.h"
233
234 #define DEPTH 16
235 #include "cirrus_vga_rop2.h"
236
237 #define DEPTH 24
238 #include "cirrus_vga_rop2.h"
239
240 #define DEPTH 32
241 #include "cirrus_vga_rop2.h"
242
243 #undef ROP_NAME
244 #undef ROP_OP
245 #undef ROP_OP_16
246 #undef ROP_OP_32