bsnes/sfc/alt/ppu-balanced/render/line.cpp

121 lines
3.0 KiB
C++

#ifdef PPU_CPP
inline uint16 PPU::get_palette(uint8 index) {
const unsigned addr = index << 1;
return cgram[addr] + (cgram[addr + 1] << 8);
}
//p = 00000bgr <palette data>
//t = BBGGGRRR <tilemap data>
//r = 0BBb00GGGg0RRRr0 <return data>
inline uint16 PPU::get_direct_color(uint8 p, uint8 t) {
return ((t & 7) << 2) | ((p & 1) << 1) |
(((t >> 3) & 7) << 7) | (((p >> 1) & 1) << 6) |
((t >> 6) << 13) | ((p >> 2) << 12);
}
inline uint16 PPU::get_pixel_normal(uint32 x) {
pixel_t& p = pixel_cache[x];
uint16 src_main, src_sub;
uint8 bg_sub;
src_main = p.src_main;
if(!regs.addsub_mode) {
bg_sub = BACK;
src_sub = regs.color_rgb;
} else {
bg_sub = p.bg_sub;
src_sub = p.src_sub;
}
if(!window[COL].main[x]) {
if(!window[COL].sub[x]) {
return 0x0000;
}
src_main = 0x0000;
}
if(!p.ce_main && regs.color_enabled[p.bg_main] && window[COL].sub[x]) {
bool halve = false;
if(regs.color_halve && window[COL].main[x]) {
if(regs.addsub_mode && bg_sub == BACK);
else {
halve = true;
}
}
return addsub(src_main, src_sub, halve);
}
return src_main;
}
inline uint16 PPU::get_pixel_swap(uint32 x) {
pixel_t& p = pixel_cache[x];
uint16 src_main, src_sub;
uint8 bg_sub;
src_main = p.src_sub;
if(!regs.addsub_mode) {
bg_sub = BACK;
src_sub = regs.color_rgb;
} else {
bg_sub = p.bg_main;
src_sub = p.src_main;
}
if(!window[COL].main[x]) {
if(!window[COL].sub[x]) {
return 0x0000;
}
src_main = 0x0000;
}
if(!p.ce_sub && regs.color_enabled[p.bg_sub] && window[COL].sub[x]) {
bool halve = false;
if(regs.color_halve && window[COL].main[x]) {
if(regs.addsub_mode && bg_sub == BACK);
else {
halve = true;
}
}
return addsub(src_main, src_sub, halve);
}
return src_main;
}
inline void PPU::render_line_output() {
uint32* ptr = (uint32*)output + (line * 1024) + ((interlace() && field()) ? 512 : 0);
uint32 curr, prev;
if(!regs.pseudo_hires && regs.bg_mode != 5 && regs.bg_mode != 6) {
for(unsigned x = 0; x < 256; x++) {
curr = (regs.display_brightness << 15) | get_pixel_normal(x);
*ptr++ = video.palette[curr];
}
} else {
for(unsigned x = 0, prev = 0; x < 256; x++) {
//blending is disabled below, as this should be done via video filtering
//blending code is left for reference purposes
curr = (regs.display_brightness << 15) | get_pixel_swap(x);
*ptr++ = video.palette[curr]; //(prev + curr - ((prev ^ curr) & 0x0421)) >> 1;
//prev = curr;
curr = (regs.display_brightness << 15) | get_pixel_normal(x);
*ptr++ = video.palette[curr]; //(prev + curr - ((prev ^ curr) & 0x0421)) >> 1;
//prev = curr;
}
}
}
inline void PPU::render_line_clear() {
uint32* ptr = (uint32*)output + (line * 1024) + ((interlace() && field()) ? 512 : 0);
unsigned width = (!regs.pseudo_hires && regs.bg_mode != 5 && regs.bg_mode != 6) ? 256 : 512;
memset(ptr, 0, width * 2 * sizeof(uint32));
}
#endif