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- [NEW] gbscreen ara accedeix a la hram i vram directament

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- [NEW] Afegida al makefile opció per a profilechar
This commit is contained in:
Raimon Zamora
2025-01-30 12:20:58 +01:00
parent 1b343e4dcc
commit dc6b3b6a78
6 changed files with 90 additions and 75 deletions
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131
gbscreen.cpp
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@@ -11,6 +11,11 @@
namespace gbscreen
{
struct oam_entry_t
{
uint8_t y, x, tile, attr;
};
uint32_t palette[4] = {
//0xFFFFFF, 0xFF0000, 0x00FF00, 0x0000FF
0xFFFFFF, 0xAAAAAA, 0x555555, 0x000000
@@ -35,11 +40,35 @@ namespace gbscreen
uint32_t t_screen = 0;
uint8_t gb_pixels[160*144];
uint8_t *ptr_pixel = gb_pixels;
uint16_t dots_in_scanline = 0;
uint8_t line_buffer[160];
uint8_t *_LCDC = nullptr;
uint8_t *_STAT = nullptr;
uint8_t *_SCY = nullptr;
uint8_t *_SCX = nullptr;
uint8_t *_LY = nullptr;
uint8_t *_LYC = nullptr;
uint8_t *_BGP = nullptr;
uint8_t *_WY = nullptr;
uint8_t *_WX = nullptr;
uint8_t *OBP = nullptr;
oam_entry_t *oam = nullptr;
uint8_t *vram = nullptr;
#define LCDC (*_LCDC)
#define STAT (*_STAT)
#define SCY (*_SCY)
#define SCX (*_SCX)
#define LY (*_LY)
#define LYC (*_LYC)
#define BGP (*_BGP)
#define WY (*_WY)
#define WX (*_WX)
bool eventHandler(SDL_Event *e)
{
if (e->type==SDL_WINDOWEVENT) {
@@ -117,6 +146,20 @@ namespace gbscreen
dest_rect.h = 144 * zoom;
}
_LCDC = mem::rawHram(0xff40);
_STAT = mem::rawHram(0xff41);
_SCY = mem::rawHram(0xff42);
_SCX = mem::rawHram(0xff43);
_LY = mem::rawHram(0xff44);
_LYC = mem::rawHram(0xff45);
_BGP = mem::rawHram(0xff47);
_WY = mem::rawHram(0xff4a);
_WX = mem::rawHram(0xff4b);
OBP = mem::rawHram(0xff48);
oam = (oam_entry_t*)mem::rawHram(0xfe00);
vram = mem::rawVram();
focus();
}
@@ -133,34 +176,30 @@ namespace gbscreen
redraw();
}
}
void fill_line_buffer_bkg(uint8_t LY)
void fill_line_buffer_bkg()
{
const uint8_t LCDC = mem::readMem(0xff40);
if ((LCDC & 0x1) == 0) {
for (int i=0; i<160; ++i) line_buffer[i]=0;
return;
}
const uint8_t SCY = mem::readMem(0xff42);
const uint8_t SCX = mem::readMem(0xff43);
const uint8_t BGP = mem::readMem(0xff47);
const uint16_t ty = uint8_t(SCY+LY) >> 3;
const uint8_t ly = uint8_t(SCY+LY) & 0x7;
uint16_t tx = SCX >> 3;
uint8_t ox = SCX & 0x7;
uint16_t base_tilemap_address = LCDC&0x8 ? 0x9c00 : 0x9800;
uint16_t base_tilemap_address = LCDC&0x8 ? 0x1c00 : 0x1800;
int pi = 0;
while(true) {
uint16_t tilemap_address = base_tilemap_address + tx + (ty<<5);
uint16_t tile = mem::readMem(tilemap_address);
uint16_t base_tile_address = 0x8000;
if ( ((LCDC&0x10)==0) && (tile<128) ) base_tile_address = 0x9000;
uint16_t tile = vram[tilemap_address];
uint16_t base_tile_address = 0x0000;
if ( ((LCDC&0x10)==0) && (tile<128) ) base_tile_address = 0x1000;
uint16_t tile_address = base_tile_address + (tile<<4) + (ly*2);
uint8_t a = mem::readMem(tile_address);
uint8_t b = mem::readMem(tile_address+1);
uint8_t a = vram[tile_address];
uint8_t b = vram[tile_address+1];
for (int i=0; i<8; ++i) {
if (ox==0) {
uint8_t index = (a&0x80 ? 1 : 0) + (b&0x80 ? 2 : 0 );
@@ -175,31 +214,27 @@ namespace gbscreen
}
}
void fill_line_buffer_win(uint8_t LY)
void fill_line_buffer_win()
{
const uint8_t LCDC = mem::readMem(0xff40);
if ((LCDC & 0x21) != 0x21) return;
const uint8_t WY = mem::readMem(0xff4a);
if (LY<WY) return;
const uint8_t WX = mem::readMem(0xff4b);
const uint8_t BGP = mem::readMem(0xff47);
const uint16_t ty = uint8_t(LY-WY) >> 3;
const uint8_t ly = uint8_t(LY-WY) & 0x7;
uint8_t ox = WX<7 ? 7-WX : 0;
uint16_t tx = 0;
uint16_t base_tilemap_address = LCDC&0x40 ? 0x9c00 : 0x9800;
uint16_t base_tilemap_address = LCDC&0x40 ? 0x1c00 : 0x1800;
int pi = WX<7 ? 0 : WX-7;
while(true) {
uint16_t tilemap_address = base_tilemap_address + tx + (ty<<5);
uint16_t tile = mem::readMem(tilemap_address);
uint16_t base_tile_address = 0x8000;
if ( ((LCDC&0x10)==0) && (tile<128) ) base_tile_address = 0x9000;
uint16_t tile = vram[tilemap_address];
uint16_t base_tile_address = 0x0000;
if ( ((LCDC&0x10)==0) && (tile<128) ) base_tile_address = 0x1000;
uint16_t tile_address = base_tile_address + (tile<<4) + (ly*2);
uint8_t a = mem::readMem(tile_address);
uint8_t b = mem::readMem(tile_address+1);
uint8_t a = vram[tile_address];
uint8_t b = vram[tile_address+1];
for (int i=0; i<8; ++i) {
if (ox==0) {
uint8_t index = (a&0x80 ? 1 : 0) + (b&0x80 ? 2 : 0 );
@@ -214,19 +249,10 @@ namespace gbscreen
}
}
struct oam_entry_t
void fill_line_buffer_obj()
{
uint8_t y, x, tile, attr;
};
oam_entry_t *oam = nullptr;
void fill_line_buffer_obj(uint8_t LY)
{
const uint8_t LCDC = mem::readMem(0xff40);
const uint8_t OBP[2] = { mem::readMem(0xff48), mem::readMem(0xff49) };
if ((LCDC & 0x2) == 0) return;
oam = (oam_entry_t*)mem::rawPtr(0xfe00);
const uint8_t height = (LCDC & 0x4) ? 16 : 8;
uint8_t obj_list[10] = { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 };
int num_obj_found=0;
@@ -251,10 +277,10 @@ namespace gbscreen
uint16_t tile = height==8 ? o->tile : o->tile & 0xFE; // si es dos tiles de alt, el primer sempre comença en numero parell
uint8_t yflip = o->attr&0x40 ? (height-1)-ly : ly; // està invertit verticalment?
uint16_t tile_address = 0x8000 + (tile<<4) + (yflip*2);
uint16_t tile_address = 0x0000 + (tile<<4) + (yflip*2);
uint8_t a = mem::readMem(tile_address);
uint8_t b = mem::readMem(tile_address+1);
uint8_t a = vram[tile_address];
uint8_t b = vram[tile_address+1];
for (int i=0; i<8; ++i) { // Per a cada pixel de la linea del tile...
if (o->x+i>=168) break; // Si ja estem fora de la pantalla per la dreta, eixim del bucle
@@ -285,19 +311,14 @@ namespace gbscreen
void refresh(const uint32_t dt, const bool full)
{
const uint8_t LCDC = mem::readMem(0xff40);
if ((LCDC&0x80)==0) return;
uint8_t STAT = mem::readMem(0xff41);
uint8_t LY = mem::readMem(0xff44);
const uint8_t LYC = mem::readMem(0xff45);
for (int i=0;i<dt;++i)
{
// Açò va volcant els pixels del line_buffer en pantalla
if ( (STAT&0x3)==3) {
uint16_t current_pixel = dots_in_scanline-80;
if (current_pixel<160) {
//*(ptr_pixel++) = line_buffer[current_pixel];
gb_pixels[current_pixel+LY*160] = line_buffer[current_pixel];
}
}
@@ -318,11 +339,10 @@ namespace gbscreen
{
dots_in_scanline = 0;
LY++;
if (LY==154) LY=0;
if (LY==144)
{
STAT = (STAT & 0xFC) | 0x01; // Set mode 1
//mem::writeMem(0xff41, STAT);
//mem::writeMem(0xff44, LY);
interrupts |= INTERRUPT_VBLANK;
if (STAT&0x10) interrupts |= INTERRUPT_LCD;
}
@@ -332,13 +352,9 @@ namespace gbscreen
{
STAT = (STAT & 0xFC) | 0x02; // Set mode 2
if (STAT&0x20) interrupts |= INTERRUPT_LCD;
fill_line_buffer_bkg(LY);
fill_line_buffer_win(LY);
fill_line_buffer_obj(LY);
}
else if (LY==154)
{
LY=0;
fill_line_buffer_bkg();
fill_line_buffer_win();
fill_line_buffer_obj();
}
}
if (LY==LYC)
@@ -354,32 +370,23 @@ namespace gbscreen
if (interrupts)
{
mem::writeMem(0xff41, STAT);
mem::writeMem(0xff44, LY);
sm83::interrupt(interrupts);
}
t_screen++;
if (t_screen>=t_states_total)
{
t_screen=0;
ptr_pixel = gb_pixels;
t_screen-=t_states_total;
redraw();
//if (!full) sm83::interrupt(INTERRUPT_VBLANK);
}
}
mem::writeMem(0xff41, STAT);
mem::writeMem(0xff44, LY);
}
void fullrefresh()
{
uint32_t tmp = t_screen;
t_screen = 0;
//uint8_t * tmp_ptr = ptr_pixel;
//ptr_pixel = gb_pixels;
refresh(t_states_total, true);
//ptr_pixel = tmp_ptr;
t_screen = tmp;
}
@@ -420,7 +427,7 @@ namespace gbscreen
if (fullscreen) SDL_GetWindowSize(win, &rect.w, &rect.h);
SDL_RenderFillRect(ren, &rect);
}
audio_viewer::refresh();
//audio_viewer::refresh();
}
void present()