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atirage: Draw frame buffer only when it changes.

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This commit is contained in:
joevt 2024-01-25 23:41:34 -08:00 committed by dingusdev
parent 5de1c23aba
commit d134107aba
3 changed files with 26 additions and 3 deletions
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20
devices/video/atirage.cpp
View File

@ -385,6 +385,16 @@ void ATIRage::write_reg(uint32_t reg_offset, uint32_t value, uint32_t size) {
}
}
break;
case ATI_CUR_CLR0:
case ATI_CUR_CLR1:
this->setup_hw_cursor();
// fallthrough
case ATI_CUR_OFFSET:
case ATI_CUR_HORZ_VERT_POSN:
case ATI_CUR_HORZ_VERT_OFF:
new_value = value;
draw_fb = true;
break;
case ATI_GP_IO:
new_value = value;
if (offset <= 1 && offset + size > 1) {
@ -446,6 +456,7 @@ void ATIRage::write_reg(uint32_t reg_offset, uint32_t value, uint32_t size) {
this->setup_hw_cursor();
else
this->cursor_on = false;
draw_fb = true;
}
if (bit_changed(old_value, new_value, ATI_GEN_GUI_RESETB)) {
if (!bit_set(new_value, ATI_GEN_GUI_RESETB))
@ -549,9 +560,11 @@ void ATIRage::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int siz
{
if (rgn_start == this->aperture_base[0] && offset < this->aperture_size[0]) {
if (offset < this->vram_size) { // little-endian VRAM region
draw_fb = true;
return write_mem(&this->vram_ptr[offset], value, size);
}
if (offset >= BE_FB_OFFSET) { // big-endian VRAM region
draw_fb = true;
return write_mem(&this->vram_ptr[offset & (BE_FB_OFFSET - 1)], value, size);
}
//if (!bit_set(this->regs[ATI_BUS_CNTL], ATI_BUS_APER_REG_DIS)) {
@ -695,38 +708,45 @@ void ATIRage::crtc_update() {
switch (this->pixel_format) {
case 1:
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 2:
if (bit_set(this->regs[ATI_DAC_CNTL], ATI_DAC_DIRECT)) {
this->convert_fb_cb = [this](uint8_t *dst_buf, int dst_pitch) {
draw_fb = false;
this->convert_frame_8bpp(dst_buf, dst_pitch);
};
}
else {
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 3:
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 4:
this->convert_fb_cb = [this](uint8_t *dst_buf, int dst_pitch) {
draw_fb = false;
this->convert_frame_16bpp(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;

8
devices/video/videoctrl.cpp
View File

@ -74,9 +74,11 @@ void VideoCtrlBase::update_screen()
this->get_cursor_position(cursor_x, cursor_y);
}
this->display.update(
this->convert_fb_cb, this->cursor_ovl_cb,
this->cursor_on, cursor_x, cursor_y);
if (draw_fb) {
this->display.update(
this->convert_fb_cb, this->cursor_ovl_cb,
this->cursor_on, cursor_x, cursor_y);
}
}
void VideoCtrlBase::start_refresh_task() {

1
devices/video/videoctrl.h
View File

@ -85,6 +85,7 @@ protected:
int pixel_format;
float pixel_clock;
float refresh_rate;
bool draw_fb = true;
uint32_t palette[256]; // internal DAC palette in RGBA format