fork of PCE focusing on macplus, supporting DaynaPort SCSI network emulation
macplus: Track writes to video memory, only draw when dirty
When we're idle and nothing is happening on screen, we can save some
host CPU by not having to constantly iterate through the video
memory buffer and send it through SDL just to redraw the same thing
over and over.
+48
+22
src/arch/macplus/macplus.c
+22
src/arch/macplus/macplus.c
···
258
258
}
259
259
260
260
static
261
+
void mac_ram_write (void *ext, uint32_t addr, unsigned size)
262
+
{
263
+
macplus_t *sim = ext;
264
+
265
+
if (sim->video == NULL) {
266
+
return;
267
+
}
268
+
269
+
if ((addr + size) > sim->video->vbuf_addr &&
270
+
addr < (sim->video->vbuf_addr + sim->video->vbuf_size)) {
271
+
mac_video_set_dirty (sim->video);
272
+
}
273
+
}
274
+
275
+
static
261
276
void mac_set_vbuf (macplus_t *sim, unsigned long addr)
262
277
{
263
278
unsigned char *vbuf;
279
+
unsigned long vbuf_size;
264
280
mem_blk_t *blk;
281
+
282
+
vbuf_size = ((unsigned long)(sim->video->w + 7) / 8) * sim->video->h;
265
283
266
284
if (addr < mem_blk_get_size (sim->ram)) {
267
285
vbuf = mem_blk_get_data (sim->ram) + addr;
···
271
289
272
290
if (blk == NULL) {
273
291
mac_video_set_vbuf (sim->video, NULL);
292
+
mac_video_set_vbuf_addr (sim->video, 0, 0);
274
293
return;
275
294
}
276
295
···
279
298
}
280
299
281
300
mac_video_set_vbuf (sim->video, vbuf);
301
+
mac_video_set_vbuf_addr (sim->video, addr, vbuf_size);
282
302
}
283
303
284
304
static
···
1394
1414
mac_setup_sound (sim, ini);
1395
1415
mac_setup_terminal (sim, ini);
1396
1416
mac_setup_video (sim, ini);
1417
+
1418
+
e68_set_ram_write_fct (sim->cpu, sim, mac_ram_write);
1397
1419
1398
1420
pce_load_mem_ini (sim->mem, ini);
1399
1421
+20
src/arch/macplus/video.c
+20
src/arch/macplus/video.c
···
33
33
int mac_video_init (mac_video_t *mv, unsigned w, unsigned h)
34
34
{
35
35
mv->vbuf = NULL;
36
+
mv->vbuf_addr = 0;
37
+
mv->vbuf_size = 0;
38
+
mv->dirty = 1;
36
39
mv->trm = NULL;
37
40
38
41
mv->w = w;
···
121
124
mv->vbuf = vbuf;
122
125
}
123
126
127
+
void mac_video_set_vbuf_addr (mac_video_t *mv, unsigned long addr, unsigned long size)
128
+
{
129
+
mv->vbuf_addr = addr;
130
+
mv->vbuf_size = size;
131
+
mv->dirty = 1;
132
+
}
133
+
134
+
void mac_video_set_dirty (mac_video_t *mv)
135
+
{
136
+
mv->dirty = 1;
137
+
}
138
+
124
139
void mac_video_set_terminal (mac_video_t *mv, terminal_t *trm)
125
140
{
126
141
mv->trm = trm;
···
186
201
return;
187
202
}
188
203
204
+
if (!mv->dirty && !mv->force) {
205
+
return;
206
+
}
207
+
189
208
for (i = 0; i < 3; i++) {
190
209
col0[i] = (mv->brightness * mv->col0[i]) / 255;
191
210
col1[i] = (mv->brightness * mv->col1[i]) / 255;
···
236
255
}
237
256
238
257
mv->force = 0;
258
+
mv->dirty = 0;
239
259
240
260
trm_update (mv->trm);
241
261
}
+6
src/arch/macplus/video.h
+6
src/arch/macplus/video.h
···
30
30
typedef struct {
31
31
const unsigned char *vbuf;
32
32
33
+
unsigned long vbuf_addr;
34
+
unsigned long vbuf_size;
35
+
char dirty;
36
+
33
37
unsigned w;
34
38
unsigned h;
35
39
···
69
73
void mac_video_set_vbi_fct (mac_video_t *mv, void *ext, void *fct);
70
74
71
75
void mac_video_set_vbuf (mac_video_t *mv, const unsigned char *vbuf);
76
+
void mac_video_set_vbuf_addr (mac_video_t *mv, unsigned long addr, unsigned long size);
77
+
void mac_video_set_dirty (mac_video_t *mv);
72
78
void mac_video_set_terminal (mac_video_t *mv, terminal_t *trm);
73
79
74
80
/*****************************************************************************