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Move video blit to seperate thread.

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This commit is contained in:
SarahW 2016-07-18 21:15:32 +01:00
commit 9f4b159121
18 changed files with 268 additions and 99 deletions
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91
src/video.c
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@ -9,6 +9,7 @@
#include "io.h"
#include "cpu.h"
#include "rom.h"
#include "thread.h"
#include "timer.h"
#include "vid_ati18800.h"
@ -213,8 +214,8 @@ int video_timing_b, video_timing_w, video_timing_l;
int video_res_x, video_res_y, video_bpp;
void (*video_blit_memtoscreen)(int x, int y, int y1, int y2, int w, int h);
void (*video_blit_memtoscreen_8)(int x, int y, int w, int h);
void (*video_blit_memtoscreen_func)(int x, int y, int y1, int y2, int w, int h);
void (*video_blit_memtoscreen_8_func)(int x, int y, int w, int h);
void video_init()
{
@ -359,6 +360,19 @@ void loadfont(char *s, int format)
fclose(f);
}
static struct
{
int x, y, y1, y2, w, h, blit8;
int busy;
int buffer_in_use;
thread_t *blit_thread;
event_t *wake_blit_thread;
event_t *blit_complete;
event_t *buffer_not_in_use;
} blit_data;
static void blit_thread(void *param);
void initvideo()
{
@ -413,12 +427,85 @@ void initvideo()
for (c = 0; c < 65536; c++)
video_16to32[c] = ((c & 31) << 3) | (((c >> 5) & 63) << 10) | (((c >> 11) & 31) << 19);
blit_data.wake_blit_thread = thread_create_event();
blit_data.blit_complete = thread_create_event();
blit_data.buffer_not_in_use = thread_create_event();
blit_data.blit_thread = thread_create(blit_thread, NULL);
}
void closevideo()
{
thread_kill(blit_data.blit_thread);
thread_destroy_event(blit_data.buffer_not_in_use);
thread_destroy_event(blit_data.blit_complete);
thread_destroy_event(blit_data.wake_blit_thread);
free(video_15to32);
free(video_16to32);
destroy_bitmap(buffer);
destroy_bitmap(buffer32);
}
static void blit_thread(void *param)
{
while (1)
{
thread_wait_event(blit_data.wake_blit_thread, -1);
thread_reset_event(blit_data.wake_blit_thread);
if (blit_data.blit8)
video_blit_memtoscreen_8_func(blit_data.x, blit_data.y, blit_data.w, blit_data.h);
else
video_blit_memtoscreen_func(blit_data.x, blit_data.y, blit_data.y1, blit_data.y2, blit_data.w, blit_data.h);
blit_data.busy = 0;
thread_set_event(blit_data.blit_complete);
}
}
void video_blit_complete()
{
blit_data.buffer_in_use = 0;
thread_set_event(blit_data.buffer_not_in_use);
}
void video_wait_for_blit()
{
while (blit_data.busy)
thread_wait_event(blit_data.blit_complete, -1);
thread_reset_event(blit_data.blit_complete);
}
void video_wait_for_buffer()
{
while (blit_data.buffer_in_use)
thread_wait_event(blit_data.buffer_not_in_use, -1);
thread_reset_event(blit_data.buffer_not_in_use);
}
void video_blit_memtoscreen(int x, int y, int y1, int y2, int w, int h)
{
video_wait_for_blit();
blit_data.busy = 1;
blit_data.buffer_in_use = 1;
blit_data.x = x;
blit_data.y = y;
blit_data.y1 = y1;
blit_data.y2 = y2;
blit_data.w = w;
blit_data.h = h;
blit_data.blit8 = 0;
thread_set_event(blit_data.wake_blit_thread);
}
void video_blit_memtoscreen_8(int x, int y, int w, int h)
{
video_wait_for_blit();
blit_data.busy = 1;
blit_data.x = x;
blit_data.y = y;
blit_data.w = w;
blit_data.h = h;
blit_data.blit8 = 1;
thread_set_event(blit_data.wake_blit_thread);
}