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atirage: Improve draw_hw_cursor loops. 

- Read 8 bytes at a time instead of just 1.
- Remove multiply operations from loop. We just need increments or additions.
- Change compares with int to compares with zero.
This commit is contained in:
joevt 2024-03-20 05:12:32 -07:00 committed by dingusdev
parent 9d0bae2d03
commit 72b257e5d1
1 changed files with 15 additions and 19 deletions
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34
devices/video/atirage.cpp
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@ -757,42 +757,38 @@ void ATIRage::crtc_update() {
this->crtc_on = true;
}
void ATIRage::draw_hw_cursor(uint8_t *dst_buf, int dst_pitch) {
uint8_t *src_buf, *src_row, *dst_row, px4;
int vert_offset = extract_bits<uint32_t>(this->regs[ATI_CUR_HORZ_VERT_OFF], ATI_CUR_VERT_OFF, ATI_CUR_VERT_OFF_size);
src_buf = &this->vram_ptr[this->regs[ATI_CUR_OFFSET] * 8];
void ATIRage::draw_hw_cursor(uint8_t* dst_row, int dst_pitch) {
int vert_offset = extract_bits<uint32_t>(
this->regs[ATI_CUR_HORZ_VERT_OFF], ATI_CUR_VERT_OFF, ATI_CUR_VERT_OFF_size);
int cur_height = 64 - vert_offset;
uint32_t color0 = this->regs[ATI_CUR_CLR0] | 0x000000FFUL;
uint32_t color1 = this->regs[ATI_CUR_CLR1] | 0x000000FFUL;
for (int h = 0; h < cur_height; h++) {
dst_row = &dst_buf[h * dst_pitch];
src_row = &src_buf[h * 16];
uint64_t* src_row = (uint64_t*)&this->vram_ptr[this->regs[ATI_CUR_OFFSET] * 8];
dst_pitch -= 64 * 4;
for (int x = 0; x < 16; x++) {
px4 = src_row[x];
for (int p = 0; p < 4; p++, px4 >>= 2, dst_row += 4) {
switch(px4 & 3) {
case 0: // cursor color 0
for (int h = cur_height; h > 0; h--) {
for (int x = 2; x > 0; x--) {
uint64_t px = *src_row++;
for (int p = 32; p > 0; p--, px >>= 2, dst_row += 4) {
switch (px & 3) {
case 0: // cursor color 0
WRITE_DWORD_BE_A(dst_row, color0);
break;
case 1: // cursor color 1
case 1: // cursor color 1
WRITE_DWORD_BE_A(dst_row, color1);
break;
case 2: // transparent
case 2: // transparent
WRITE_DWORD_BE_A(dst_row, 0);
break;
case 3: // 1's complement of display pixel
case 3: // 1's complement of display pixel
WRITE_DWORD_BE_A(dst_row, 0x0000007F);
break;
}
}
}
dst_row += dst_pitch;
}
}