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Working (but with pitch troubles) BitBLT emulation

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This commit is contained in:
Cacodemon345
2024-02-02 13:20:24 +06:00
parent 08660004af
commit 08d784fe07
1 changed files with 10 additions and 11 deletions
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21
src/video/vid_c&t_69000.c
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@@ -460,7 +460,7 @@ chips_69000_do_rop_8bpp_patterned(uint8_t *dst, uint8_t src, uint8_t nonpattern_
}
void
chips_69000_do_rop_16bpp_patterned(uint16_t *dst, uint16_t src, uint8_t nonpattern_src, uint8_t rop)
chips_69000_do_rop_16bpp_patterned(uint16_t *dst, uint16_t src, uint16_t nonpattern_src, uint8_t rop)
{
if ((rop & 0xF) == ((rop >> 4) & 0xF)) {
return chips_69000_do_rop_16bpp(dst, nonpattern_src, rop);
@@ -521,7 +521,7 @@ chips_69000_do_rop_16bpp_patterned(uint16_t *dst, uint16_t src, uint8_t nonpatte
}
void
chips_69000_do_rop_24bpp_patterned(uint32_t *dst, uint32_t src, uint8_t nonpattern_src, uint8_t rop)
chips_69000_do_rop_24bpp_patterned(uint32_t *dst, uint32_t src, uint32_t nonpattern_src, uint8_t rop)
{
uint32_t orig_dst = *dst & 0xFF000000;
@@ -832,10 +832,6 @@ chips_69000_setup_bitblt(chips_69000_t* chips)
break;
}
if (chips->bitblt_running.bitblt.bitblt_control & (1 << 10)) {
return;
}
/* Drawing is pointless if monochrome pattern is enabled, monochrome write-masking is enabled and solid pattern is enabled. */
if ((chips->bitblt_running.bitblt.bitblt_control & (1 << 17))
&& (chips->bitblt_running.bitblt.bitblt_control & (1 << 18))
@@ -844,6 +840,10 @@ chips_69000_setup_bitblt(chips_69000_t* chips)
return;
}
if (chips->bitblt_running.bitblt.bitblt_control & (1 << 10)) {
return;
}
do {
do {
uint32_t pixel = 0;
@@ -896,16 +896,15 @@ chips_69000_bitblt_write(chips_69000_t* chips, uint8_t data) {
if (chips->bitblt_running.bytes_written == chips->bitblt_running.bytes_per_pixel) {
uint32_t source_pixel = chips->bitblt_running.bytes_port[0];
chips->bitblt_running.bytes_written = 0;
if (chips->bitblt_running.bytes_per_pixel == 1)
source_pixel = (chips->bitblt_running.bytes_port[1] << 8);
if (chips->bitblt_running.bytes_per_pixel == 2)
source_pixel = (chips->bitblt_running.bytes_port[2] << 16);
source_pixel |= (chips->bitblt_running.bytes_port[1] << 8);
if (chips->bitblt_running.bytes_per_pixel == 3)
source_pixel |= (chips->bitblt_running.bytes_port[2] << 16);
chips_69000_process_pixel(chips, source_pixel);
chips->bitblt_running.x += chips->bitblt_running.x_dir;
chips->bitblt_running.count_x++;
if (chips->bitblt_running.count_x >= chips->bitblt_running.actual_destination_width) {
if (++chips->bitblt_running.count_x >= chips->bitblt_running.actual_destination_width - 1) {
chips->bitblt_running.y += chips->bitblt_running.y_dir;
chips->bitblt_running.count_y++;