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Non-CPU-driven monochrome source blits
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@Cacodemon345
Cacodemon345 committed Feb 6, 2024
1 parent cd03088 commit 614241b
Showing 1 changed file with 72 additions and 6 deletions.
78 changes: 72 additions & 6 deletions src/video/vid_c&t_69000.c
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Original file line number Diff line number Diff line change
Expand Up @@ -137,7 +137,6 @@ typedef struct chips_69000_t {
uint8_t bytes_skip;
uint32_t bytes_counter;
uint32_t bytes_in_line_written;
uint32_t bytes_in_line_counter;
uint8_t bytes_port[8];

/* Monochrome sources. */
Expand Down Expand Up @@ -1103,6 +1102,8 @@ chips_69000_process_mono_data_non_qword(UNUSED(chips_69000_t* chips), uint8_t va
}
}

void chips_69000_bitblt_write(chips_69000_t* chips, uint8_t data);

void
chips_69000_setup_bitblt(chips_69000_t* chips)
{
Expand Down Expand Up @@ -1161,7 +1162,6 @@ chips_69000_setup_bitblt(chips_69000_t* chips)
if (!(chips->bitblt_running.bitblt.bitblt_control & (1 << 12))) {
//pclog("source_span = %d, dest_span = %d\n", chips->bitblt_running.bitblt.source_span, chips->bitblt_running.bitblt.destination_span);
//pclog("destination_width = %d (qword aligned = %d), skip left = %d\n", chips->bitblt_running.bitblt.destination_width, (chips->bitblt_running.bitblt.destination_width + 7) & ~7, chips->bitblt_running.bitblt.source_addr);
chips->bitblt_running.bytes_in_line_counter = (chips->bitblt_running.bitblt.source_addr + chips->bitblt_running.bitblt.destination_width + 7) & ~7;
if ((chips->bitblt_running.bitblt.source_addr + (chips->bitblt_running.bitblt.destination_width)) > ((chips->bitblt_running.bitblt.destination_width + 7) & ~7))
chips->bitblt_running.bytes_skip = 8 + (((chips->bitblt_running.bitblt.destination_width + 7) & ~7) - chips->bitblt_running.bitblt.destination_width);
}
Expand All @@ -1182,9 +1182,49 @@ chips_69000_setup_bitblt(chips_69000_t* chips)
chips->bitblt_running.bitblt.destination_height);

while (chips->engine_active) {
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[0]);

source_addr += chips->bitblt_running.x_dir;
switch (chips->bitblt_running.bitblt.monochrome_source_alignment) {
case 0: /* Source-span aligned. */
{
/* TODO: This is handled purely on a best case basis. */
uint32_t orig_count_y = chips->bitblt_running.count_y;
uint32_t orig_source_addr = chips->bitblt_running.bitblt.source_addr;
while (orig_count_y == chips->bitblt_running.count_y) {
uint8_t data = chips_69000_readb_linear(orig_source_addr, chips);
orig_source_addr++;
chips_69000_bitblt_write(chips, data & 0xFF);
if ((source_addr + chips->bitblt_running.bitblt.source_span) == orig_source_addr)
break;
}

source_addr = chips->bitblt_running.bitblt.source_addr + chips->bitblt_running.bitblt.source_span;
chips->bitblt_running.bitblt.source_addr = source_addr;
break;
}
case 4: /* Doubleword-aligned*/
{
uint32_t data = chips_69000_readl_linear(source_addr, chips);
chips_69000_bitblt_write(chips, data & 0xFF);
chips_69000_bitblt_write(chips, (data >> 8) & 0xFF);
chips_69000_bitblt_write(chips, (data >> 16) & 0xFF);
chips_69000_bitblt_write(chips, (data >> 24) & 0xFF);
source_addr += 4;
break;
}
case 5: /* Quadword-aligned*/
{
uint64_t data = (uint64_t)chips_69000_readl_linear(source_addr, chips) | ((uint64_t)chips_69000_readl_linear(source_addr + 4, chips) << 32ull);
chips_69000_bitblt_write(chips, data & 0xFF);
chips_69000_bitblt_write(chips, (data >> 8) & 0xFF);
chips_69000_bitblt_write(chips, (data >> 16) & 0xFF);
chips_69000_bitblt_write(chips, (data >> 24) & 0xFF);
chips_69000_bitblt_write(chips, (data >> 32ull) & 0xFF);
chips_69000_bitblt_write(chips, (data >> 40ull) & 0xFF);
chips_69000_bitblt_write(chips, (data >> 48ull) & 0xFF);
chips_69000_bitblt_write(chips, (data >> 56ull) & 0xFF);
source_addr += 8;
break;
}
}
}
}

Expand Down Expand Up @@ -1236,7 +1276,16 @@ chips_69000_bitblt_write(chips_69000_t* chips, uint8_t data) {

if (chips->bitblt_running.bitblt.bitblt_control & (1 << 12)) {
chips->bitblt_running.bytes_port[chips->bitblt_running.bytes_written++] = data;
if (chips->bitblt_running.bitblt.monochrome_source_alignment == 4
if (chips->bitblt_running.bitblt.monochrome_source_alignment == 0) {
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[0]);
chips->bitblt_running.bytes_written &= 7;
} else if (chips->bitblt_running.bitblt.monochrome_source_alignment == 3
&& chips->bitblt_running.bytes_written == 2) {
chips->bitblt_running.bytes_written = 0;
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[0]);
if (chips->bitblt_running.actual_destination_width > 8)
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[1]);
} else if (chips->bitblt_running.bitblt.monochrome_source_alignment == 4
&& chips->bitblt_running.bytes_written == 4) {
chips->bitblt_running.bytes_written = 0;
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[0]);
Expand All @@ -1246,6 +1295,23 @@ chips_69000_bitblt_write(chips_69000_t* chips, uint8_t data) {
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[2]);
if (chips->bitblt_running.actual_destination_width > 24)
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[3]);
} else if (chips->bitblt_running.bitblt.monochrome_source_alignment == 5 && chips->bitblt_running.bytes_written == 8) {
chips->bitblt_running.bytes_written = 0;
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[0]);
if (chips->bitblt_running.actual_destination_width > 8)
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[1]);
if (chips->bitblt_running.actual_destination_width > 16)
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[2]);
if (chips->bitblt_running.actual_destination_width > 24)
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[3]);
if (chips->bitblt_running.actual_destination_width > 32)
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[4]);
if (chips->bitblt_running.actual_destination_width > 40)
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[5]);
if (chips->bitblt_running.actual_destination_width > 48)
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[6]);
if (chips->bitblt_running.actual_destination_width > 52)
chips_69000_process_mono_data_non_qword(chips, chips->bitblt_running.bytes_port[7]);
} else if (chips->bitblt_running.bytes_written == 8) {
chips->bitblt_running.bytes_written = 0;
uint64_t mono_data = chips->bitblt_running.bytes_port[0];
Expand Down

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