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(screen) Only repaint changed pixels

This commit is contained in:
Devine Lu Linvega 2023-05-04 11:15:16 -07:00
parent a740105b76
commit 8f98281d89
4 changed files with 28 additions and 13 deletions
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29
src/devices/screen.c
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@ -24,6 +24,15 @@ static Uint8 blending[4][16] = {
{1, 2, 3, 1, 1, 2, 3, 1, 1, 2, 3, 1, 1, 2, 3, 1}, {1, 2, 3, 1, 1, 2, 3, 1, 1, 2, 3, 1, 1, 2, 3, 1},
{2, 3, 1, 2, 2, 3, 1, 2, 2, 3, 1, 2, 2, 3, 1, 2}}; {2, 3, 1, 2, 2, 3, 1, 2, 2, 3, 1, 2, 2, 3, 1, 2}};
static void
screen_change(UxnScreen *s, Uint16 x1, Uint16 y1, Uint16 x2, Uint16 y2)
{
if(x1 < s->x1) s->x1 = x1;
if(y1 < s->y1) s->y1 = y1;
if(x2 > s->x2) s->x2 = x2;
if(y2 > s->y2) s->y2 = y2;
}
static void static void
screen_fill(UxnScreen *s, Uint8 *pixels, Uint16 x1, Uint16 y1, Uint16 x2, Uint16 y2, Uint8 color) screen_fill(UxnScreen *s, Uint8 *pixels, Uint16 x1, Uint16 y1, Uint16 x2, Uint16 y2, Uint8 color)
{ {
@ -63,7 +72,7 @@ screen_palette(UxnScreen *p, Uint8 *addr)
p->palette[i] = 0x0f000000 | r << 16 | g << 8 | b; p->palette[i] = 0x0f000000 | r << 16 | g << 8 | b;
p->palette[i] |= p->palette[i] << 4; p->palette[i] |= p->palette[i] << 4;
} }
p->fg.changed = p->bg.changed = 1; screen_change(&uxn_screen, 0, 0, p->width, p->height);
} }
void void
@ -90,13 +99,19 @@ screen_resize(UxnScreen *p, Uint16 width, Uint16 height)
void void
screen_redraw(UxnScreen *p) screen_redraw(UxnScreen *p)
{ {
Uint32 i, size = p->width * p->height, palette[16], *pixels = p->pixels; Uint32 i, x, y, w = p->width, palette[16], *pixels = p->pixels;
Uint8 *fg = p->fg.pixels, *bg = p->bg.pixels; Uint8 *fg = p->fg.pixels, *bg = p->bg.pixels;
int x1 = p->x1, y1 = p->y1;
int x2 = p->x2 > p->width ? p->width : p->x2, y2 = p->y2 > p->height ? p->height : p->y2;
for(i = 0; i < 16; i++) for(i = 0; i < 16; i++)
palette[i] = p->palette[(i >> 2) ? (i >> 2) : (i & 3)]; palette[i] = p->palette[(i >> 2) ? (i >> 2) : (i & 3)];
for(i = 0; i < size; i++) for(y = y1; y < y2; y++)
for(x = x1; x < x2; x++) {
i = x + y * w;
pixels[i] = palette[fg[i] << 2 | bg[i]]; pixels[i] = palette[fg[i] << 2 | bg[i]];
p->fg.changed = p->bg.changed = 0; }
p->x1 = p->y1 = 0xffff;
p->x2 = p->y2 = 0;
} }
Uint8 Uint8
@ -134,7 +149,7 @@ screen_deo(Uint8 *ram, Uint8 *d, Uint8 port)
if(ctrl & 0x10) x2 = x, x = 0; if(ctrl & 0x10) x2 = x, x = 0;
if(ctrl & 0x20) y2 = y, y = 0; if(ctrl & 0x20) y2 = y, y = 0;
screen_fill(&uxn_screen, layer->pixels, x, y, x2, y2, color); screen_fill(&uxn_screen, layer->pixels, x, y, x2, y2, color);
layer->changed = 1; screen_change(&uxn_screen, x, y, x2, y2);
} }
/* pixel mode */ /* pixel mode */
else { else {
@ -142,7 +157,7 @@ screen_deo(Uint8 *ram, Uint8 *d, Uint8 port)
Uint16 height = uxn_screen.height; Uint16 height = uxn_screen.height;
if(x < width && y < height) if(x < width && y < height)
layer->pixels[x + y * width] = color; layer->pixels[x + y * width] = color;
layer->changed = 1; screen_change(&uxn_screen, x, y, x + 1, y + 1);
if(d[0x6] & 0x1) POKE2(d + 0x8, x + 1); /* auto x+1 */ if(d[0x6] & 0x1) POKE2(d + 0x8, x + 1); /* auto x+1 */
if(d[0x6] & 0x2) POKE2(d + 0xa, y + 1); /* auto y+1 */ if(d[0x6] & 0x2) POKE2(d + 0xa, y + 1); /* auto y+1 */
} }
@ -164,7 +179,7 @@ screen_deo(Uint8 *ram, Uint8 *d, Uint8 port)
screen_blit(&uxn_screen, layer->pixels, x + dy * i, y + dx * i, ram, addr, ctrl & 0xf, ctrl & 0x10, ctrl & 0x20, twobpp); screen_blit(&uxn_screen, layer->pixels, x + dy * i, y + dx * i, ram, addr, ctrl & 0xf, ctrl & 0x10, ctrl & 0x20, twobpp);
addr += (move & 0x04) << (1 + twobpp); addr += (move & 0x04) << (1 + twobpp);
} }
layer->changed = 1; screen_change(&uxn_screen, x, y, x + dy * length + 8, y + dx * length + 8);
if(move & 0x1) POKE2(d + 0x8, x + dx); /* auto x+8 */ if(move & 0x1) POKE2(d + 0x8, x + dx); /* auto x+8 */
if(move & 0x2) POKE2(d + 0xa, y + dy); /* auto y+8 */ if(move & 0x2) POKE2(d + 0xa, y + dy); /* auto y+8 */
if(move & 0x4) POKE2(d + 0xc, addr); /* auto addr+length */ if(move & 0x4) POKE2(d + 0xc, addr); /* auto addr+length */

4
src/devices/screen.h
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@ -11,12 +11,12 @@ WITH REGARD TO THIS SOFTWARE.
*/ */
typedef struct Layer { typedef struct Layer {
Uint8 *pixels, changed; Uint8 *pixels;
} Layer; } Layer;
typedef struct UxnScreen { typedef struct UxnScreen {
Uint32 palette[4], *pixels; Uint32 palette[4], *pixels;
Uint16 width, height; Uint16 width, height, x1, y1, x2, y2;
Layer fg, bg; Layer fg, bg;
} UxnScreen; } UxnScreen;

2
src/uxnemu.c
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@ -467,7 +467,7 @@ run(Uxn *u)
return 0; return 0;
screen_vector = PEEK2(&u->dev[0x20]); screen_vector = PEEK2(&u->dev[0x20]);
uxn_eval(u, screen_vector); uxn_eval(u, screen_vector);
if(uxn_screen.fg.changed || uxn_screen.bg.changed) if(uxn_screen.x2)
redraw(); redraw();
now = SDL_GetPerformanceCounter(); now = SDL_GetPerformanceCounter();
if(screen_vector) { if(screen_vector) {