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dingusppc/devices/atirage.cpp

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/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-20 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "displayid.h"
#include "endianswap.h"
#include "memaccess.h"
#include "pcidevice.h"
#include <atirage.h>
#include <chrono>
#include <cstdint>
#include <map>
#include <loguru.hpp>
/* Mach64 post dividers. */
static const int mach64_post_div[8] = {
1, 2, 4, 8, // standard post dividers
3, 5, 6, 12 // alternate post dividers
};
/* Human readable Mach64 HW register names for easier debugging. */
static const std::map<uint16_t, std::string> mach64_reg_names = {
{0x0000, "CRTC_H_TOTAL_DISP"},
{0x0004, "CRTC_H_SYNC_STRT_WID"},
{0x0008, "CRTC_V_TOTAL_DISP"},
{0x000C, "CRTC_V_SYNC_STRT_WID"},
{0x0010, "CRTC_VLINE_CRNT_VLINE"},
{0x0014, "CRTC_OFF_PITCH"},
{0x0018, "CRTC_INT_CNTL"},
{0x001C, "CRTC_GEN_CNTL"},
{0x0020, "DSP_CONFIG"},
{0x0024, "DSP_ON_OFF"},
{0x002C, "MEM_BUF_CNTL"},
{0x0034, "MEM_ADDR_CFG"},
{0x0040, "OVR_CLR"},
{0x0044, "OVR_WID_LEFT_RIGHT"},
{0x0048, "OVR_WID_TOP_BOTTOM"},
{0x0060, "CUR_CLR0"},
{0x0064, "CUR_CLR1"},
{0x0068, "CUR_OFFSET"},
{0x006C, "CUR_HORZ_VERT_POSN"},
{0x0078, "GP_IO"},
{0x007C, "HW_DEBUG"},
{0x0080, "SCRATCH_REG0"},
{0x0084, "SCRATCH_REG1"},
{0x0088, "SCRATCH_REG2"},
{0x008C, "SCRATCH_REG3"},
{0x0090, "CLOCK_CNTL"},
{0x00A0, "BUS_CNTL"},
{0x00AC, "EXT_MEM_CNTL"},
{0x00B0, "MEM_CNTL"},
{0x00C0, "DAC_REGS"},
{0x00C4, "DAC_CNTL"},
{0x00D0, "GEN_TEST_CNTL"},
{0x00D4, "CUSTOM_MACRO_CNTL"},
{0x00E0, "CONFIG_CHIP_ID"},
{0x00E4, "CONFIG_STAT0"},
{0x01B4, "SRC_CNTL"},
{0x01FC, "SCALE_3D_CNTL"},
{0x0310, "FIFO_STAT"},
{0x0338, "GUI_STAT"},
{0x04C0, "MPP_CONFIG"},
{0x04C4, "MPP_STROBE_SEQ"},
{0x04C8, "MPP_ADDR"},
{0x04CC, "MPP_DATA"},
{0x0500, "TVO_CNTL"},
{0x0704, "SETUP_CNTL"},
};
ATIRage::ATIRage(uint16_t dev_id, uint32_t mem_amount) : PCIDevice("ati-rage") {
uint8_t asic_id;
this->vram_size = mem_amount << 20;
/* allocate video RAM */
this->vram_ptr = new uint8_t[this->vram_size];
/* ATI Rage driver needs to know ASIC ID (manufacturer's internal chip code)
to operate properly */
switch (dev_id) {
case ATI_RAGE_GT_DEV_ID:
asic_id = 0x9A; // GT-B2U3 fabricated by UMC
break;
case ATI_RAGE_PRO_DEV_ID:
asic_id = 0x5C; // R3B/D/P-A4 fabricated by UMC
break;
default:
asic_id = 0xDD;
LOG_F(WARNING, "ATI Rage: bogus ASIC ID assigned!");
}
/* set up PCI configuration space header */
WRITE_DWORD_LE_A(&this->pci_cfg[0], (dev_id << 16) | ATI_PCI_VENDOR_ID);
WRITE_DWORD_LE_A(&this->pci_cfg[8], (0x030000 << 8) | asic_id);
WRITE_DWORD_LE_A(&this->pci_cfg[0x3C], 0x00080100);
/* stuff default values into chip registers */
WRITE_DWORD_LE_A(&this->block_io_regs[ATI_CONFIG_CHIP_ID],
(asic_id << 24) | dev_id);
/* initialize display identification */
this->disp_id = new DisplayID();
//this->surface = new uint8_t[640 * 480];
}
ATIRage::~ATIRage()
{
//delete (this->surface);
if (this->vram_ptr) {
delete this->vram_ptr;
}
delete (this->disp_id);
}
const char* ATIRage::get_reg_name(uint32_t reg_offset) {
auto iter = mach64_reg_names.find(reg_offset & ~3);
if (iter != mach64_reg_names.end()) {
return iter->second.c_str();
} else {
return "unknown Mach64 register";
}
}
uint32_t ATIRage::read_reg(uint32_t offset, uint32_t size) {
uint32_t res;
switch (offset & ~3) {
case ATI_GP_IO:
break;
case ATI_CLOCK_CNTL:
/* reading from internal PLL registers */
if (offset == ATI_CLOCK_CNTL+2 && size == 1 &&
!(this->block_io_regs[ATI_CLOCK_CNTL+1] & 0x2)) {
return this->plls[this->block_io_regs[ATI_CLOCK_CNTL+1] >> 2];
}
break;
case ATI_DAC_REGS:
if (offset == ATI_DAC_DATA) {
this->block_io_regs[ATI_DAC_DATA] =
this->palette[this->block_io_regs[ATI_DAC_R_INDEX]][this->comp_index];
this->comp_index++; /* move to next color component */
if (this->comp_index >= 3) {
/* autoincrement reading index - move to next palette entry */
(this->block_io_regs[ATI_DAC_R_INDEX])++;
this->comp_index = 0;
}
}
break;
default:
LOG_F(
INFO,
"ATI Rage: read I/O reg %s at 0x%X, size=%d, val=0x%X",
get_reg_name(offset),
offset,
size,
read_mem(&this->block_io_regs[offset], size));
}
res = read_mem(&this->block_io_regs[offset], size);
return res;
}
void ATIRage::write_reg(uint32_t offset, uint32_t value, uint32_t size) {
uint32_t gpio_val;
uint16_t gpio_dir;
/* size-dependent endian conversion */
write_mem(&this->block_io_regs[offset], value, size);
switch (offset & ~3) {
case ATI_CRTC_OFF_PITCH:
LOG_F(INFO, "ATI Rage: CRTC_OFF_PITCH=0x%08X", READ_DWORD_LE_A(&this->block_io_regs[ATI_CRTC_OFF_PITCH]));
break;
case ATI_CRTC_GEN_CNTL:
if (this->block_io_regs[ATI_CRTC_GEN_CNTL+3] & 2) {
this->crtc_enable();
} else {
this->crtc_on = false;
}
LOG_F(INFO, "ATI Rage: CRTC_GEN_CNTL:CRTC_ENABLE=%d", !!(this->block_io_regs[ATI_CRTC_GEN_CNTL+3] & 2));
LOG_F(INFO, "ATI Rage: CRTC_GEN_CNTL:CRTC_DISPLAY_DIS=%d", !!(this->block_io_regs[ATI_CRTC_GEN_CNTL] & 0x40));
break;
case ATI_CUR_OFFSET:
LOG_F(INFO, "ATI Rage: CUR_OFFSET=0x%08X", READ_DWORD_LE_A(&this->block_io_regs[ATI_CUR_OFFSET]));
break;
case ATI_CUR_HORZ_VERT_POSN:
LOG_F(INFO, "ATI Rage: CUR_HORZ_VERT_POSN=0x%08X", READ_DWORD_LE_A(&this->block_io_regs[ATI_CUR_HORZ_VERT_POSN]));
break;
case ATI_CUR_HORZ_VERT_OFF:
LOG_F(INFO, "ATI Rage: CUR_HORZ_VERT_OFF=0x%08X", READ_DWORD_LE_A(&this->block_io_regs[ATI_CUR_HORZ_VERT_OFF]));
break;
case ATI_GP_IO:
if (offset < (ATI_GP_IO + 2)) {
gpio_val = READ_DWORD_LE_A(&this->block_io_regs[ATI_GP_IO]);
gpio_dir = (gpio_val >> 16) & 0x3FFF;
WRITE_WORD_LE_A(
&this->block_io_regs[ATI_GP_IO],
this->disp_id->read_monitor_sense(gpio_val, gpio_dir));
}
break;
case ATI_CLOCK_CNTL:
/* writing to internal PLL registers */
if (offset == ATI_CLOCK_CNTL+2 && size == 1 &&
(this->block_io_regs[ATI_CLOCK_CNTL+1] & 0x2)) {
int pll_addr = this->block_io_regs[ATI_CLOCK_CNTL+1] >> 2;
uint8_t pll_data = this->block_io_regs[ATI_CLOCK_CNTL+2];
this->plls[pll_addr] = pll_data;
LOG_F(INFO, "ATI Rage: PLL #%d set to 0x%02X", pll_addr, pll_data);
} else if (offset == ATI_CLOCK_CNTL && size == 1) {
LOG_F(INFO, "ATI Rage: CLOCK_SEL = 0x%02X",
this->block_io_regs[ATI_CLOCK_CNTL] & 3);
}
break;
case ATI_DAC_REGS:
switch (offset) {
/* writing to read/write index registers resets color component index */
case ATI_DAC_W_INDEX:
case ATI_DAC_R_INDEX:
this->comp_index = 0;
break;
case ATI_DAC_DATA:
this->palette[this->block_io_regs[ATI_DAC_W_INDEX]][this->comp_index] = value & 0xFF;
this->comp_index++; /* move to next color component */
if (this->comp_index >= 3) {
LOG_F(
INFO,
"ATI DAC palette entry #%d set to R=%X, G=%X, B=%X",
this->block_io_regs[ATI_DAC_W_INDEX],
this->palette[this->block_io_regs[ATI_DAC_W_INDEX]][0],
this->palette[this->block_io_regs[ATI_DAC_W_INDEX]][1],
this->palette[this->block_io_regs[ATI_DAC_W_INDEX]][2]);
/* autoincrement writing index - move to next palette entry */
(this->block_io_regs[ATI_DAC_W_INDEX])++;
this->comp_index = 0;
}
}
break;
case ATI_GEN_TEST_CNTL:
LOG_F(INFO, "HW cursor: %s", this->block_io_regs[ATI_GEN_TEST_CNTL] & 0x80 ? "on" : "off");
break;
default:
LOG_F(
INFO,
"ATI Rage: %s register at 0x%X set to 0x%X",
get_reg_name(offset),
offset & ~3,
READ_DWORD_LE_A(&this->block_io_regs[offset & ~3]));
}
if ((this->block_io_regs[ATI_CRTC_GEN_CNTL+3] & 2) &&
!(this->block_io_regs[ATI_CRTC_GEN_CNTL] & 0x40)) {
this->update_screen();
}
}
uint32_t ATIRage::pci_cfg_read(uint32_t reg_offs, uint32_t size) {
uint32_t res = 0;
LOG_F(INFO, "Reading ATI Rage config space, offset = 0x%X, size=%d", reg_offs, size);
res = read_mem(&this->pci_cfg[reg_offs], size);
LOG_F(INFO, "Return value: 0x%X", res);
return res;
}
void ATIRage::pci_cfg_write(uint32_t reg_offs, uint32_t value, uint32_t size) {
LOG_F(
INFO,
"Writing into ATI Rage PCI config space, offset = 0x%X, val=0x%X size=%d",
reg_offs,
BYTESWAP_32(value),
size);
switch (reg_offs) {
case 0x10: /* BAR 0 */
if (value == 0xFFFFFFFFUL) {
WRITE_DWORD_LE_A(&this->pci_cfg[CFG_REG_BAR0], 0xFF000000UL);
}
else {
this->aperture_base = BYTESWAP_32(value);
LOG_F(INFO, "ATI Rage aperture address set to 0x%08X", this->aperture_base);
WRITE_DWORD_BE_A(&this->pci_cfg[CFG_REG_BAR0], value);
this->host_instance->pci_register_mmio_region(this->aperture_base,
APERTURE_SIZE, this);
}
break;
case 0x14: /* BAR 1: I/O space base, 256 bytes wide */
if (value == 0xFFFFFFFFUL) {
WRITE_DWORD_BE_A(&this->pci_cfg[CFG_REG_BAR1], 0xFFFFFF01UL);
}
else {
WRITE_DWORD_BE_A(&this->pci_cfg[CFG_REG_BAR1], value);
}
break;
case 0x18: /* BAR 2 */
if (value == 0xFFFFFFFFUL) {
WRITE_DWORD_BE_A(&this->pci_cfg[CFG_REG_BAR2], 0xFFFFF000UL);
}
else {
WRITE_DWORD_BE_A(&this->pci_cfg[CFG_REG_BAR2], value);
}
break;
case CFG_REG_BAR3: /* unimplemented */
case CFG_REG_BAR4: /* unimplemented */
case CFG_REG_BAR5: /* unimplemented */
WRITE_DWORD_BE_A(&this->pci_cfg[reg_offs], 0);
break;
case CFG_EXP_BASE: /* no expansion ROM */
if (value == 0x00F8FFFFUL) {
// return 0 (not implemented) when attempting to size the expansion ROM
WRITE_DWORD_BE_A(&this->pci_cfg[reg_offs], 0);
} else {
WRITE_DWORD_BE_A(&this->pci_cfg[reg_offs], value);
}
break;
default:
write_mem(&this->pci_cfg[reg_offs], value, size);
}
}
bool ATIRage::io_access_allowed(uint32_t offset, uint32_t* p_io_base) {
if (!(this->pci_cfg[CFG_REG_CMD] & 1)) {
LOG_F(WARNING, "ATI I/O space disabled in the command reg");
return false;
}
uint32_t io_base = READ_DWORD_LE_A(&this->pci_cfg[CFG_REG_BAR1]) & ~3;
if (offset < io_base || offset > (io_base + 0x100)) {
LOG_F(WARNING, "Rage: I/O out of range, base=0x%X, offset=0x%X", io_base, offset);
return false;
}
*p_io_base = io_base;
return true;
}
bool ATIRage::pci_io_read(uint32_t offset, uint32_t size, uint32_t* res) {
uint32_t io_base;
if (!this->io_access_allowed(offset, &io_base)) {
return false;
}
*res = this->read_reg(offset - io_base, size);
return true;
}
bool ATIRage::pci_io_write(uint32_t offset, uint32_t value, uint32_t size) {
uint32_t io_base;
if (!this->io_access_allowed(offset, &io_base)) {
return false;
}
this->write_reg(offset - io_base, value, size);
return true;
}
uint32_t ATIRage::read(uint32_t reg_start, uint32_t offset, int size)
{
LOG_F(8, "Reading ATI Rage PCI memory: region=%X, offset=%X, size %d", reg_start, offset, size);
if (reg_start < this->aperture_base || offset > APERTURE_SIZE) {
LOG_F(WARNING, "ATI Rage: attempt to read outside the aperture!");
return 0;
}
if (offset < this->vram_size) {
/* read from little-endian VRAM region */
return read_mem(this->vram_ptr + offset, size);
}
else if (offset >= BE_FB_OFFSET) {
/* read from big-endian VRAM region */
return read_mem_rev(this->vram_ptr + (offset - BE_FB_OFFSET), size);
}
else if (offset >= MM_REGS_0_OFF) {
/* read from memory-mapped registers, block 0 */
return this->read_reg(offset - MM_REGS_0_OFF, size);
}
else if (offset >= MM_REGS_1_OFF) {
/* read from memory-mapped registers, block 1 */
return this->read_reg(offset - MM_REGS_1_OFF + 0x400, size);
}
else {
LOG_F(WARNING, "ATI Rage: read attempt from unmapped aperture region at 0x%08X", offset);
}
return 0;
}
void ATIRage::write(uint32_t reg_start, uint32_t offset, uint32_t value, int size)
{
LOG_F(8, "Writing reg=%X, offset=%X, value=%X, size %d", reg_start, offset, value, size);
if (reg_start < this->aperture_base || offset > APERTURE_SIZE) {
LOG_F(WARNING, "ATI Rage: attempt to write outside the aperture!");
return;
}
if (offset < this->vram_size) {
/* write to little-endian VRAM region */
write_mem(this->vram_ptr + offset, value, size);
}
else if (offset >= BE_FB_OFFSET) {
/* write to big-endian VRAM region */
write_mem_rev(this->vram_ptr + (offset - BE_FB_OFFSET), value, size);
}
else if (offset >= MM_REGS_0_OFF) {
/* write to memory-mapped registers, block 0 */
this->write_reg(offset - MM_REGS_0_OFF, value, size);
}
else if (offset >= MM_REGS_1_OFF) {
/* write to memory-mapped registers, block 1 */
this->write_reg(offset - MM_REGS_1_OFF + 0x400, value, size);
}
else {
LOG_F(WARNING, "ATI Rage: write attempt to unmapped aperture region at 0x%08X", offset);
}
}
float ATIRage::calc_pll_freq(int scale, int fb_div) {
return (ATI_XTAL * scale * fb_div) / this->plls[PLL_REF_DIV];
}
void ATIRage::verbose_pixel_format(int crtc_index) {
if (crtc_index) {
LOG_F(ERROR, "CRTC2 not supported yet");
return;
}
const char* what = "Pixel format:";
switch (this->block_io_regs[ATI_CRTC_GEN_CNTL+1] & 7) {
case 1:
LOG_F(INFO, "%s 4 bpp with DAC palette", what);
break;
case 2:
// check the undocumented DAC_DIRECT bit
if (this->block_io_regs[ATI_DAC_CNTL+1] & 4) {
LOG_F(INFO, "%s 8 bpp direct color (RGB322)", what);
} else {
LOG_F(INFO, "%s 8 bpp with DAC palette", what);
}
break;
case 3:
LOG_F(INFO, "%s 15 bpp direct color (RGB555)", what);
break;
case 4:
LOG_F(INFO, "%s 16 bpp direct color (RGB565)", what);
break;
case 5:
LOG_F(INFO, "%s 24 bpp direct color (RGB888)", what);
break;
case 6:
LOG_F(INFO, "%s 32 bpp direct color (ARGB8888)", what);
break;
default:
LOG_F(ERROR, "ATI Rage: CRTC pixel format %d not supported",
this->block_io_regs[ATI_CRTC_GEN_CNTL+2] & 7);
}
}
void ATIRage::crtc_enable() {
/* active (visible) width is specified in characters (8 px) - 1 */
this->active_width = (this->block_io_regs[ATI_CRTC_H_TOTAL_DISP+2] + 1) * 8;
/* active (visible) height is specified in lines - 1 */
this->active_height =
(READ_WORD_LE_A(&this->block_io_regs[ATI_CRTC_V_TOTAL_DISP+2]) & 0x7FFUL) + 1;
if ((this->plls[PLL_VCLK_CNTL] & 3) == 3) {
/* look up which VPLL ouput is requested */
int clock_sel = this->block_io_regs[ATI_CLOCK_CNTL] & 3;
/* calculate VPLL output frequency */
float vpll_freq = calc_pll_freq(2, this->plls[VCLK0_FB_DIV + clock_sel]);
/* calculate post divider's index */
/* NOTE: post divider's index has been extended by an additional
bit in Rage Pro. This bit is resided in PLL_EXT_CNTL register.
*/
int post_div_idx = ((this->plls[PLL_EXT_CNTL] >> (clock_sel + 2)) & 4) |
((this->plls[VCLK_POST_DIV] >> (clock_sel * 2)) & 3);
/* pixel clock = source_freq / post_div */
this->pixel_clock = vpll_freq / mach64_post_div[post_div_idx];
/* calculate display refresh rate */
int hori_total =
((READ_WORD_LE_A(&this->block_io_regs[ATI_CRTC_H_TOTAL_DISP])
& 0x1FFUL) + 1) * 8;
int vert_total =
(READ_WORD_LE_A(&this->block_io_regs[ATI_CRTC_V_TOTAL_DISP]) & 0x7FFUL) + 1;
this->refresh_rate = pixel_clock / hori_total / vert_total;
LOG_F(INFO, "ATI Rage: primary CRT controller enabled:");
LOG_F(INFO, "Video mode: %s",
(this->block_io_regs[ATI_CRTC_GEN_CNTL+3] & 1) ? "extended" : "VGA");
LOG_F(INFO, "Video width: %d px", this->active_width);
LOG_F(INFO, "Video height: %d px", this->active_height);
verbose_pixel_format(0);
LOG_F(INFO, "VPLL frequency: %f MHz", vpll_freq * 1e-6);
LOG_F(INFO, "Pixel (dot) clock: %f MHz", this->pixel_clock * 1e-6);
LOG_F(INFO, "Refresh rate: %f Hz", this->refresh_rate);
} else {
LOG_F(WARNING, "ATI Rage: VLCK source != VPLL!");
}
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 horz_offset = READ_DWORD_LE_A(&this->block_io_regs[ATI_CUR_HORZ_VERT_OFF]) & 0x3F;
int vert_offset = (READ_DWORD_LE_A(&this->block_io_regs[ATI_CUR_HORZ_VERT_OFF]) >> 16) & 0x3F;
src_buf = this->vram_ptr + (READ_DWORD_LE_A(&this->block_io_regs[ATI_CUR_OFFSET]) * 8);
int cur_height = 64 - vert_offset;
uint32_t color0 = READ_DWORD_LE_A(&this->block_io_regs[ATI_CUR_CLR0]) | 0x000000FFUL;
uint32_t color1 = READ_DWORD_LE_A(&this->block_io_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];
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
WRITE_DWORD_BE_A(dst_row, color0);
break;
case 1: // cursor color 1
WRITE_DWORD_BE_A(dst_row, color1);
break;
case 2: // transparent
break;
case 3: // 1's complement of display pixel
break;
}
}
}
}
}
void ATIRage::update_screen() {
uint8_t *src_buf, *dst_buf, *src_row, *dst_row, pix;
int src_pitch, dst_pitch;
//auto start_time = std::chrono::steady_clock::now();
this->disp_id->get_disp_texture((void **)&dst_buf, &dst_pitch);
uint32_t src_offset = (READ_DWORD_LE_A(&this->block_io_regs[ATI_CRTC_OFF_PITCH]) & 0xFFFF) * 8;
src_pitch = ((READ_DWORD_LE_A(&this->block_io_regs[ATI_CRTC_OFF_PITCH])) >> 19) & 0x1FF8;
src_buf = this->vram_ptr + src_offset;
for (int h = 0; h < this->active_height; h++) {
src_row = &src_buf[h * src_pitch];
dst_row = &dst_buf[h * dst_pitch];
for (int x = 0; x < this->active_width; x++) {
pix = src_row[x];
dst_row[0] = this->palette[pix][2]; // B
dst_row[1] = this->palette[pix][1]; // G
dst_row[2] = this->palette[pix][0]; // R
dst_row[3] = 255; // A
dst_row += 4;
}
}
// HW cursor data is stored at the beginning of the video memory
// HACK: use src_offset to recognize cursor data being ready
// Normally, we should check GEN_CUR_ENABLE bit in the GEN_TEST_CNTL register
if (src_offset > 0x400 && READ_DWORD_LE_A(&this->block_io_regs[ATI_CUR_OFFSET])) {
this->draw_hw_cursor(dst_buf + dst_pitch * 20 + 120, dst_pitch);
}
this->disp_id->update_screen();
//auto end_time = std::chrono::steady_clock::now();
//auto time_elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end_time - start_time);
//LOG_F(INFO, "Display uodate took: %lld ns", time_elapsed.count());
SDL_Delay(15);
}
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