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System 16A - sprites - support screen flip

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This commit is contained in:
Barry Harris 2017-02-06 13:49:34 +00:00
parent d27eacbb71
commit e01e03e139
1 changed files with 35 additions and 64 deletions
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99
src/burn/drv/sega/sys16_gfx.cpp
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@ -1587,73 +1587,44 @@ static void System16ARenderSpriteLayer(INT32 Priority)
bank %= numbanks;
spritedata = spritebase + 0x8000 * bank;
if (!System16ScreenFlip) {
for (y = top; y < bottom; y++) {
addr += pitch;
if (y >= 0 && y <= 223) {
UINT16* pPixel = pTransDraw + (y * 320);
if (!(addr & 0x8000)) {
/* start at the word before because we preincrement below */
data[7] = addr - 1;
for (x = xpos; ((xpos - x) & 0x1ff) != 1; ) {
UINT16 pixels = BURN_ENDIAN_SWAP_INT16(spritedata[++data[7] & 0x7fff]);
pix = (pixels >> 12) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 8) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 4) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 0) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
if (pix == 15) break;
}
} else {
data[7] = addr + 1;
for (x = xpos; ((xpos - x) & 0x1ff) != 1; ) {
UINT16 pixels = BURN_ENDIAN_SWAP_INT16(spritedata[--data[7] & 0x7fff]);
/* draw four pixels */
pix = (pixels >> 0) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 4) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 8) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 12) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
/* stop if the last pixel in the group was 0xf */
if (pix == 15) break;
}
if (System16ScreenFlip) {
INT32 temp = top;
top = 224 - bottom;
bottom = 224 - temp;
xpos = 320 - xpos;
xdelta = -1;
}
for (y = top; y < bottom; y++) {
addr += pitch;
if (y >= 0 && y <= 223) {
UINT16* pPixel = pTransDraw + (y * 320);
if (!(addr & 0x8000)) {
/* start at the word before because we preincrement below */
data[7] = addr - 1;
for (x = xpos; ((xpos - x) & 0x1ff) != 1; ) {
UINT16 pixels = BURN_ENDIAN_SWAP_INT16(spritedata[++data[7] & 0x7fff]);
pix = (pixels >> 12) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 8) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 4) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 0) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
if (pix == 15) break;
}
}
}
} else {
for (y = bottom - 3; y > top - 3; y--) {
addr += pitch;
if (y >= 0 && y <= 223) {
UINT16* pPixel = pTransDraw + (y * 320);
if (!(addr & 0x8000)) {
/* start at the word before because we preincrement below */
data[7] = addr - 1;
for (x = xpos; ((xpos - x) & 0x1ff) != 1; ) {
UINT16 pixels = BURN_ENDIAN_SWAP_INT16(spritedata[++data[7] & 0x7fff]);
pix = (pixels >> 12) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 8) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 4) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 0) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
if (pix == 15) break;
}
} else {
data[7] = addr + 1;
for (x = xpos; ((xpos - x) & 0x1ff) != 1; ) {
UINT16 pixels = BURN_ENDIAN_SWAP_INT16(spritedata[--data[7] & 0x7fff]);
} else {
data[7] = addr + 1;
for (x = xpos; ((xpos - x) & 0x1ff) != 1; ) {
UINT16 pixels = BURN_ENDIAN_SWAP_INT16(spritedata[--data[7] & 0x7fff]);
/* draw four pixels */
pix = (pixels >> 0) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 4) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 8) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 12) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
/* draw four pixels */
pix = (pixels >> 0) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 4) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 8) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
pix = (pixels >> 12) & 0xf; System16DrawPixel(x, pix, color, pPixel); x += xdelta;
/* stop if the last pixel in the group was 0xf */
if (pix == 15) break;
}
/* stop if the last pixel in the group was 0xf */
if (pix == 15) break;
}
}
}