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(screen.c) Reduced number of variables indirections

This commit is contained in:
Devine Lu Linvega 2023-04-14 09:51:50 -07:00
parent b6e6839d25
commit 04554dd1d3
1 changed files with 19 additions and 18 deletions
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37
src/devices/screen.c
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@ -25,27 +25,27 @@ static Uint8 blending[4][16] = {
{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 static void
screen_fill(UxnScreen *p, Layer *layer, 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)
{ {
int x, y; int x, y, width = s->width, height = s->height;
for(y = y1; y < y2 && y < p->height; y++) for(y = y1; y < y2 && y < height; y++)
for(x = x1; x < x2 && x < p->width; x++) for(x = x1; x < x2 && x < width; x++)
layer->pixels[x + y * p->width] = color; pixels[x + y * width] = color;
} }
static void static void
screen_blit(UxnScreen *p, Layer *layer, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 color, Uint8 flipx, Uint8 flipy, Uint8 twobpp) screen_blit(UxnScreen *p, Uint8 *pixels, Uint16 x1, Uint16 y1, Uint8 *sprite, Uint8 color, Uint8 flipx, Uint8 flipy, Uint8 twobpp)
{ {
int v, h, opaque = (color % 5) || !color; int v, h, width = p->width, height = p->height, opaque = (color % 5) || !color;
for(v = 0; v < 8; v++) { for(v = 0; v < 8; v++) {
Uint16 c = sprite[v] | (twobpp ? (sprite[v + 8] << 8) : 0); Uint16 c = sprite[v] | (twobpp ? (sprite[v + 8] << 8) : 0);
Uint16 y = y1 + (flipy ? 7 - v : v);
for(h = 7; h >= 0; --h, c >>= 1) { for(h = 7; h >= 0; --h, c >>= 1) {
Uint8 ch = (c & 1) | ((c >> 7) & 2); Uint8 ch = (c & 1) | ((c >> 7) & 2);
if(opaque || ch) { if(opaque || ch) {
Uint16 xx = x + (flipx ? 7 - h : h); Uint16 x = x1 + (flipx ? 7 - h : h);
Uint16 yy = y + (flipy ? 7 - v : v); if(x < width && y < height)
if(xx < p->width && yy < p->height) pixels[x + y * width] = blending[ch][color];
layer->pixels[xx + yy * p->width] = blending[ch][color];
} }
} }
} }
@ -83,18 +83,19 @@ screen_resize(UxnScreen *p, Uint16 width, Uint16 height)
p->pixels = pixels; p->pixels = pixels;
p->width = width; p->width = width;
p->height = height; p->height = height;
screen_fill(p, &p->bg, 0, 0, p->width, p->height, 0); screen_fill(p, p->bg.pixels, 0, 0, p->width, p->height, 0);
screen_fill(p, &p->fg, 0, 0, p->width, p->height, 0); screen_fill(p, p->fg.pixels, 0, 0, p->width, p->height, 0);
} }
void void
screen_redraw(UxnScreen *p) screen_redraw(UxnScreen *p)
{ {
Uint32 i, size = p->width * p->height, palette[16]; Uint32 i, size = p->width * p->height, palette[16], *pixels = p->pixels;
Uint8 *fg = p->fg.pixels, *bg = p->bg.pixels;
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(i = 0; i < size; i++)
p->pixels[i] = palette[p->fg.pixels[i] << 2 | p->bg.pixels[i]]; pixels[i] = palette[fg[i] << 2 | bg[i]];
p->fg.changed = p->bg.changed = 0; p->fg.changed = p->bg.changed = 0;
} }
@ -132,7 +133,7 @@ screen_deo(Uint8 *ram, Uint8 *d, Uint8 port)
Uint16 y2 = uxn_screen.height; Uint16 y2 = uxn_screen.height;
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, x, y, x2, y2, color); screen_fill(&uxn_screen, layer->pixels, x, y, x2, y2, color);
layer->changed = 1; layer->changed = 1;
} }
/* pixel mode */ /* pixel mode */
@ -164,9 +165,9 @@ screen_deo(Uint8 *ram, Uint8 *d, Uint8 port)
for(i = 0; i <= length; i++) { for(i = 0; i <= length; i++) {
if(!(ctrl & 0xf)) { if(!(ctrl & 0xf)) {
Uint16 ex = x + dy * i, ey = y + dx * i; Uint16 ex = x + dy * i, ey = y + dx * i;
screen_fill(&uxn_screen, layer, ex, ey, ex + 8, ey + 8, 0); screen_fill(&uxn_screen, layer->pixels, ex, ey, ex + 8, ey + 8, 0);
} else { } else {
screen_blit(&uxn_screen, layer, 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);
} }
} }