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(Screen) Only check for screen boundary in blit, once

This commit is contained in:
neauoire 2023-11-11 21:47:54 -08:00
parent e52db28299
commit f98b69827f
2 changed files with 15 additions and 15 deletions
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28
src/devices/screen.c
View File

@ -47,7 +47,7 @@ screen_fill(Uint8 *layer, int color)
}
void
screen_rect(Uint8 *layer, int x1, int y1, int x2, int y2, int color)
screen_rect(Uint8 *layer, Uint16 x1, Uint16 y1, Uint16 x2, Uint16 y2, int color)
{
int x, y, width = uxn_screen.width, height = uxn_screen.height;
for(y = y1; y < y2 && y < height; y++)
@ -56,19 +56,19 @@ screen_rect(Uint8 *layer, int x1, int y1, int x2, int y2, int color)
}
static void
screen_blit(Uint8 *layer, Uint8 *ram, Uint16 addr, int x1, int y1, int color, int flipx, int flipy, int twobpp)
screen_blit(Uint8 *layer, Uint8 *ram, Uint16 addr, Uint16 x1, Uint16 y1, Uint16 color, int flipx, int flipy, int twobpp)
{
int v, h, width = uxn_screen.width, height = uxn_screen.height, opaque = (color % 5);
/* TODO: Draw partial tile */
if(x1 + 8 >= width) return;
if(y1 + 8 >= height) return;
for(v = 0; v < 8; v++) {
Uint16 c = ram[(addr + v) & 0xffff] | (twobpp ? (ram[(addr + v + 8) & 0xffff] << 8) : 0);
Uint16 y = y1 + (flipy ? 7 - v : v);
int y = (y1 + (flipy ? 7 - v : v)) * width;
for(h = 7; h >= 0; --h, c >>= 1) {
Uint8 ch = (c & 1) | ((c >> 7) & 2);
if(opaque || ch) {
Uint16 x = x1 + (flipx ? 7 - h : h);
if(x < width && y < height)
layer[x + y * width] = blending[ch][color];
}
if(opaque || ch)
layer[(x1 + (flipx ? 7 - h : h)) + y] = blending[ch][color];
}
}
}
@ -104,16 +104,16 @@ screen_debugger(Uxn *u)
int i;
for(i = 0; i < 0x08; i++) {
Uint8 pos = u->wst.ptr - 4 + i;
Uint8 color = i > 4 ? 0x01 : !pos ? 0xc
: i == 4 ? 0x8
: 0x2;
Uint8 color = i > 4 ? 0x01 : !pos ? 0xc :
i == 4 ? 0x8 :
0x2;
draw_byte(u->wst.dat[pos], i * 0x18 + 0x8, uxn_screen.height - 0x18, color);
}
for(i = 0; i < 0x08; i++) {
Uint8 pos = u->rst.ptr - 4 + i;
Uint8 color = i > 4 ? 0x01 : !pos ? 0xc
: i == 4 ? 0x8
: 0x2;
Uint8 color = i > 4 ? 0x01 : !pos ? 0xc :
i == 4 ? 0x8 :
0x2;
draw_byte(u->rst.dat[pos], i * 0x18 + 0x8, uxn_screen.height - 0x10, color);
}
screen_blit(uxn_screen.fg, arrow, 0, 0x68, uxn_screen.height - 0x20, 3, 0, 0, 0);

2
src/devices/screen.h
View File

@ -23,7 +23,7 @@ extern UxnScreen uxn_screen;
extern int emu_resize(int width, int height);
void screen_fill(Uint8 *layer, int color);
void screen_rect(Uint8 *layer, int x1, int y1, int x2, int y2, int color);
void screen_rect(Uint8 *layer, Uint16 x1, Uint16 y1, Uint16 x2, Uint16 y2, int color);
void screen_palette(Uint8 *addr);
void screen_resize(Uint16 width, Uint16 height);
void screen_change(Uint16 x1, Uint16 y1, Uint16 x2, Uint16 y2);