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atimach64gx: Redraw only when necessary.

This commit is contained in:
joevt 2024-04-20 03:40:08 -07:00 committed by dingusdev
parent e6d669d187
commit 755dd7f60a
1 changed files with 42 additions and 0 deletions
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42
devices/video/atimach64gx.cpp
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@ -502,6 +502,39 @@ void AtiMach64Gx::write_reg(uint32_t reg_offset, uint32_t value, uint32_t size)
}
break;
}
case ATI_OVR_CLR:
case ATI_OVR_WID_LEFT_RIGHT:
case ATI_OVR_WID_TOP_BOTTOM:
new_value = value;
if (value != 0) {
LOG_F(ERROR, "%s: Unhandled value 0x%08x.", this->name.c_str(), value);
}
return;
case ATI_CUR_CLR0:
case ATI_CUR_CLR1:
new_value = value;
this->cursor_dirty = true;
draw_fb = true;
return;
case ATI_CUR_OFFSET:
new_value = value;
if (old_value != new_value)
this->cursor_dirty = true;
draw_fb = true;
return;
case ATI_CUR_HORZ_VERT_OFF:
new_value = value;
if (
extract_bits<uint32_t>(new_value, ATI_CUR_VERT_OFF, ATI_CUR_VERT_OFF_size) !=
extract_bits<uint32_t>(old_value, ATI_CUR_VERT_OFF, ATI_CUR_VERT_OFF_size)
)
this->cursor_dirty = true;
draw_fb = true;
return;
case ATI_CUR_HORZ_VERT_POSN:
new_value = value;
draw_fb = true;
return;
case ATI_DAC_REGS:
new_value = old_value; // no change
if (size == 1) { // only byte accesses are allowed for DAC registers
@ -559,6 +592,7 @@ void AtiMach64Gx::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int
{
if (rgn_start == this->aperture_base[0]) {
if (offset < this->vram_size) {
draw_fb = true;
return write_mem(&this->vram_ptr[offset], value, size);
}
if (offset >= this->mm_regs_offset && offset < this->mm_regs_offset + 0x400) {
@ -677,6 +711,8 @@ void AtiMach64Gx::crtc_update()
if (!need_recalc)
return;
this->draw_fb = true;
// calculate display refresh rate
this->refresh_rate = this->pixel_clock / this->hori_total / this->vert_total;
@ -690,26 +726,31 @@ void AtiMach64Gx::crtc_update()
switch (this->pixel_format) {
case 2:
this->convert_fb_cb = [this](uint8_t *dst_buf, int dst_pitch) {
draw_fb = false;
this->convert_frame_4bpp_indexed(dst_buf, dst_pitch);
};
break;
case 3:
this->convert_fb_cb = [this](uint8_t *dst_buf, int dst_pitch) {
draw_fb = false;
this->convert_frame_8bpp_indexed(dst_buf, dst_pitch);
};
break;
case 4:
this->convert_fb_cb = [this](uint8_t *dst_buf, int dst_pitch) {
draw_fb = false;
this->convert_frame_15bpp_BE(dst_buf, dst_pitch);
};
break;
case 5:
this->convert_fb_cb = [this](uint8_t *dst_buf, int dst_pitch) {
draw_fb = false;
this->convert_frame_24bpp(dst_buf, dst_pitch);
};
break;
case 6:
this->convert_fb_cb = [this](uint8_t *dst_buf, int dst_pitch) {
draw_fb = false;
this->convert_frame_32bpp_BE(dst_buf, dst_pitch);
};
break;
@ -812,6 +853,7 @@ void AtiMach64Gx::rgb514_write_reg(uint8_t reg_addr, uint8_t value)
clut_color[1], clut_color[2], 0xFF);
this->clut_index++;
this->comp_index = 0;
draw_fb = true;
}
break;
case Rgb514::CLUT_MASK: