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Minor cleanup

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This commit is contained in:
neauoire 2021-04-07 20:30:10 -07:00
parent 33a660aef8
commit 63fa4242c3
4 changed files with 58 additions and 72 deletions
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2
build.sh
View file

@ -30,7 +30,7 @@ else
fi
echo "Assembling.."
./bin/assembler projects/software/noodle.usm bin/boot.rom
./bin/assembler projects/examples/dev.audio.usm bin/boot.rom
echo "Running.."
if [ "${2}" = '--cli' ];

90
src/emulator.c
View file

@ -18,36 +18,20 @@ WITH REGARD TO THIS SOFTWARE.
int initapu(Uxn *u, Uint8 id);
static Ppu screen;
SDL_AudioDeviceID audio_id;
static SDL_Window *gWindow;
static SDL_Renderer *gRenderer;
static SDL_Texture *gTexture;
SDL_AudioDeviceID audio_id;
static Ppu ppu;
static Device *devsystem, *devscreen, *devmouse, *devkey, *devctrl;
#pragma mark - Helpers
int
clamp(int val, int min, int max)
{
return (val >= min) ? (val <= max) ? val : max : min;
}
void
setflag(Uint8 *a, char flag, int b)
{
if(b)
*a |= flag;
else
*a &= (~flag);
}
int
getflag(Uint8 *a, char flag)
{
return *a & flag;
}
/* clang-format off */
int clamp(int val, int min, int max) { return (val >= min) ? (val <= max) ? val : max : min; }
void setflag(Uint8 *a, char flag, int b) { if(b) *a |= flag; else *a &= (~flag); }
/* clang-format on */
#pragma mark - Core
@ -61,41 +45,35 @@ error(char *msg, const char *err)
void
redraw(Uint32 *dst, Uxn *u)
{
Uint16 x, y;
for(y = 0; y < VER; ++y)
for(x = 0; x < HOR; ++x) {
Uint16 key = (y * HOR + x) * 16;
drawchr(&screen, (x + PAD) * 8, (y + PAD) * 8, &screen.bg[key], 0);
drawchr(&screen, (x + PAD) * 8, (y + PAD) * 8, &screen.fg[key], 1);
}
if(screen.debugger)
drawdebugger(&screen, u->wst.dat, u->wst.ptr);
draw(&ppu);
if(ppu.debugger)
drawdebugger(&ppu, u->wst.dat, u->wst.ptr);
SDL_UpdateTexture(gTexture, NULL, dst, WIDTH * sizeof(Uint32));
SDL_RenderClear(gRenderer);
SDL_RenderCopy(gRenderer, gTexture, NULL, NULL);
SDL_RenderPresent(gRenderer);
screen.reqdraw = 0;
ppu.reqdraw = 0;
}
void
toggledebug(Uxn *u)
{
screen.debugger = !screen.debugger;
redraw(screen.output, u);
ppu.debugger = !ppu.debugger;
redraw(ppu.output, u);
}
void
togglezoom(Uxn *u)
{
screen.zoom = screen.zoom == 3 ? 1 : screen.zoom + 1;
SDL_SetWindowSize(gWindow, WIDTH * screen.zoom, HEIGHT * screen.zoom);
redraw(screen.output, u);
ppu.zoom = ppu.zoom == 3 ? 1 : ppu.zoom + 1;
SDL_SetWindowSize(gWindow, WIDTH * ppu.zoom, HEIGHT * ppu.zoom);
redraw(ppu.output, u);
}
void
quit(void)
{
free(screen.output);
free(ppu.output);
SDL_DestroyTexture(gTexture);
gTexture = NULL;
SDL_DestroyRenderer(gRenderer);
@ -111,7 +89,7 @@ init(void)
{
if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0)
return error("Init", SDL_GetError());
gWindow = SDL_CreateWindow("Uxn", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WIDTH * screen.zoom, HEIGHT * screen.zoom, SDL_WINDOW_SHOWN);
gWindow = SDL_CreateWindow("Uxn", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WIDTH * ppu.zoom, HEIGHT * ppu.zoom, SDL_WINDOW_SHOWN);
if(gWindow == NULL)
return error("Window", SDL_GetError());
gRenderer = SDL_CreateRenderer(gWindow, -1, 0);
@ -122,7 +100,7 @@ init(void)
return error("Texture", SDL_GetError());
SDL_StartTextInput();
SDL_ShowCursor(SDL_DISABLE);
if(!initppu(&screen))
if(!initppu(&ppu))
return error("PPU", "Init failure");
return 1;
}
@ -132,8 +110,8 @@ domouse(Uxn *u, SDL_Event *event)
{
Uint8 flag = 0x00;
Uint16 addr = devmouse->addr + 2;
Uint16 x = clamp(event->motion.x / screen.zoom - PAD * 8, 0, HOR * 8 - 1);
Uint16 y = clamp(event->motion.y / screen.zoom - PAD * 8, 0, VER * 8 - 1);
Uint16 x = clamp(event->motion.x / ppu.zoom - PAD * 8, 0, HOR * 8 - 1);
Uint16 y = clamp(event->motion.y / ppu.zoom - PAD * 8, 0, VER * 8 - 1);
u->ram.dat[addr + 0] = (x >> 8) & 0xff;
u->ram.dat[addr + 1] = x & 0xff;
u->ram.dat[addr + 2] = (y >> 8) & 0xff;
@ -149,9 +127,9 @@ domouse(Uxn *u, SDL_Event *event)
break;
case SDL_MOUSEBUTTONDOWN:
setflag(&u->ram.dat[addr + 4], flag, 1);
if(flag == 0x10 && getflag(&u->ram.dat[addr + 4], 0x01))
if(flag == 0x10 && (u->ram.dat[addr + 4] & 0x01))
u->ram.dat[addr + 5] = 0x01;
if(flag == 0x01 && getflag(&u->ram.dat[addr + 4], 0x10))
if(flag == 0x01 && (u->ram.dat[addr + 4] & 0x10))
u->ram.dat[addr + 5] = 0x10;
break;
}
@ -229,8 +207,8 @@ screen_poke(Uxn *u, Uint16 ptr, Uint8 b0, Uint8 b1)
if(b0 == 0x0c) {
Uint16 x = (m[ptr] << 8) + m[ptr + 1];
Uint16 y = (m[ptr + 2] << 8) + m[ptr + 3];
paintpixel(b1 >> 4 & 0xf ? screen.fg : screen.bg, x, y, b1 & 0xf);
screen.reqdraw = 1;
putpixel(b1 >> 4 & 0xf ? ppu.fg : ppu.bg, x, y, b1 & 0xf);
ppu.reqdraw = 1;
}
return b1;
}
@ -245,16 +223,16 @@ sprite_poke(Uxn *u, Uint16 ptr, Uint8 b0, Uint8 b1)
Uint16 x = (m[ptr] << 8) + m[ptr + 1];
Uint16 y = (m[ptr + 2] << 8) + m[ptr + 3];
Uint8 blend = b1 & 0xf;
Uint8 *layer = ((b1 >> 4) & 0xf) % 2 ? screen.fg : screen.bg;
Uint8 *layer = ((b1 >> 4) & 0xf) % 2 ? ppu.fg : ppu.bg;
Uint8 *sprite = &m[(m[ptr + 4] << 8) + m[ptr + 5]];
for(v = 0; v < 8; v++)
for(h = 0; h < 8; h++) {
Uint8 ch1 = ((sprite[v] >> (7 - h)) & 0x1);
if(ch1 == 0 && (blend == 0x05 || blend == 0x0a || blend == 0x0f))
continue;
paintpixel(layer, x + h, y + v, ch1 ? blend % 4 : blend / 4);
putpixel(layer, x + h, y + v, ch1 ? blend % 4 : blend / 4);
}
screen.reqdraw = 1;
ppu.reqdraw = 1;
}
return b1;
}
@ -319,7 +297,7 @@ system_poke(Uxn *u, Uint16 ptr, Uint8 b0, Uint8 b1)
{
Uint8 *m = u->ram.dat;
m[PAGE_DEVICE + b0] = b1;
loadtheme(&screen, &m[PAGE_DEVICE + 0x0008]);
loadtheme(&ppu, &m[PAGE_DEVICE + 0x0008]);
(void)ptr;
return b1;
}
@ -339,7 +317,7 @@ int
start(Uxn *u)
{
inituxn(u, 0x0200);
redraw(screen.output, u);
redraw(ppu.output, u);
while(1) {
SDL_Event event;
double elapsed, start = SDL_GetPerformanceCounter();
@ -367,14 +345,14 @@ start(Uxn *u)
break;
case SDL_WINDOWEVENT:
if(event.window.event == SDL_WINDOWEVENT_EXPOSED)
redraw(screen.output, u);
redraw(ppu.output, u);
break;
}
}
evaluxn(u, devscreen->vector);
SDL_UnlockAudioDevice(audio_id);
if(screen.reqdraw)
redraw(screen.output, u);
if(ppu.reqdraw)
redraw(ppu.output, u);
elapsed = (SDL_GetPerformanceCounter() - start) / (double)SDL_GetPerformanceFrequency() * 1000.0f;
SDL_Delay(clamp(16.666f - elapsed, 0, 1000));
}
@ -385,7 +363,7 @@ int
main(int argc, char **argv)
{
Uxn u;
screen.zoom = 2;
ppu.zoom = 2;
if(argc < 2)
return error("Input", "Missing");

29
src/ppu.c
View file

@ -33,10 +33,9 @@ Uint8 font[][8] = {
void
clear(Ppu *p)
{
int v, h;
for(v = 0; v < HEIGHT; v++)
for(h = 0; h < WIDTH; h++)
p->output[v * WIDTH + h] = p->colors[0];
int i, sz = HEIGHT * WIDTH;
for(i = 0; i < sz; ++i)
p->output[i] = p->colors[0];
}
void
@ -90,19 +89,19 @@ drawdebugger(Ppu *p, Uint8 *stack, Uint8 ptr)
}
void
paintpixel(Uint8 *dst, Uint16 x, Uint16 y, Uint8 color)
putpixel(Uint8 *layer, Uint16 x, Uint16 y, Uint8 color)
{
Uint16 row = (y % 8) + ((x / 8 + y / 8 * HOR) * 16), col = 7 - (x % 8);
if(x >= HOR * 8 || y >= VER * 8 || row > RES - 8)
return;
if(color == 0 || color == 2)
dst[row] &= ~(1UL << col);
layer[row] &= ~(1UL << col);
else
dst[row] |= 1UL << col;
layer[row] |= 1UL << col;
if(color == 0 || color == 1)
dst[row + 8] &= ~(1UL << col);
layer[row + 8] &= ~(1UL << col);
else
dst[row + 8] |= 1UL << col;
layer[row + 8] |= 1UL << col;
}
void
@ -119,6 +118,18 @@ loadtheme(Ppu *p, Uint8 *addr)
p->reqdraw = 1;
}
void
draw(Ppu *p)
{
Uint16 x, y;
for(y = 0; y < VER; ++y)
for(x = 0; x < HOR; ++x) {
Uint16 key = (y * HOR + x) * 16;
drawchr(p, (x + PAD) * 8, (y + PAD) * 8, &p->bg[key], 0);
drawchr(p, (x + PAD) * 8, (y + PAD) * 8, &p->fg[key], 1);
}
}
int
initppu(Ppu *p)
{

9
src/ppu.h
View file

@ -32,11 +32,8 @@ typedef struct Ppu {
Uint32 *output, colors[4];
} Ppu;
void clear(Ppu *p);
void drawpixel(Ppu *p, Uint16 x, Uint16 y, Uint8 color);
void drawchr(Ppu *p, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 alpha);
void drawicn(Ppu *p, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 fg, Uint8 bg);
int initppu(Ppu *p);
void draw(Ppu *p);
void drawdebugger(Ppu *p, Uint8 *stack, Uint8 ptr);
void paintpixel(Uint8 *dst, Uint16 x, Uint16 y, Uint8 color);
void loadtheme(Ppu *p, Uint8 *addr);
int initppu(Ppu *p);
void putpixel(Uint8 *layer, Uint16 x, Uint16 y, Uint8 color);