mirror of
https://github.com/dingusdev/dingusppc.git
synced 2024-12-27 00:29:18 +00:00
273 lines
8.2 KiB
C++
273 lines
8.2 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-23 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** @file PDM on-board video emulation. */
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#include <core/timermanager.h>
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#include <cpu/ppc/ppcmmu.h>
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#include <devices/memctrl/hmc.h>
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#include <devices/video/pdmonboard.h>
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#include <devices/video/videoctrl.h>
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#include <machines/machinebase.h>
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#include <loguru.hpp>
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#include <cinttypes>
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PdmOnboardVideo::PdmOnboardVideo()
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: VideoCtrlBase()
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{
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this->video_mode = PDM_VMODE_OFF;
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this->blanking = 0x80;
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this->crtc_on = false;
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this->vdac_mode = 8;
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this->pixel_depth = 0;
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// get pointer to the Highspeed Memory controller
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this->hmc_obj = dynamic_cast<HMC*>(gMachineObj->get_comp_by_name("HMC"));
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}
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void PdmOnboardVideo::set_video_mode(uint8_t new_mode)
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{
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if (this->blanking != (new_mode & 0x80)) {
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if (new_mode & 0x80) {
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this->disable_video_internal();
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} else {
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this->blank_on = false;
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this->blanking = 0;
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}
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}
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switch(new_mode & 0x7F) {
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case PdmVideoMode::Portrait:
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case PdmVideoMode::Rgb12in:
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case PdmVideoMode::Rgb13in:
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case PdmVideoMode::Rgb16in:
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case PdmVideoMode::VGA:
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if (this->video_mode != (new_mode & 0x1F)) {
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this->video_mode = new_mode & 0x1F;
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LOG_F(INFO, "PDM-Video: video mode set to 0x%X", this->video_mode);
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}
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if (!this->blanking) {
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this->enable_video_internal();
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}
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break;
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default:
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LOG_F(9, "PDM-Video: video disabled, new mode = 0x%X", new_mode & 0x1F);
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this->video_mode = new_mode & 0x1F;
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this->disable_video_internal();
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}
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}
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void PdmOnboardVideo::set_pixel_depth(uint8_t depth)
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{
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static uint8_t pix_depths[8] = {1, 2, 4, 8, 16, 0xFF, 0xFF, 0xFF};
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uint8_t new_pix_depth = pix_depths[depth];
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if (new_pix_depth == 0xFF) {
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ABORT_F("PDM-Video: invalid pixel depth code %d specified!", depth);
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}
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if (new_pix_depth != this->pixel_depth) {
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this->pixel_depth = new_pix_depth;
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this->set_depth_internal(this->active_width);
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LOG_F(INFO, "PDM-Video: pixel depth changed to %dbpp", new_pix_depth);
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}
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}
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void PdmOnboardVideo::set_vdac_config(uint8_t mode)
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{
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this->vdac_mode = mode;
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if ((mode & 0xF8) != 8) {
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LOG_F(WARNING, "Ariel control changed to unknown value 0x%X", mode);
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}
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}
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void PdmOnboardVideo::set_clut_index(uint8_t index)
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{
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this->clut_index = index;
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this->comp_index = 0;
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}
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void PdmOnboardVideo::set_clut_color(uint8_t color)
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{
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this->clut_color[this->comp_index++] = color;
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if (this->comp_index >= 3) {
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this->set_palette_color(this->clut_index, clut_color[0],
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clut_color[1], clut_color[2], 0xFF);
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this->clut_index++;
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this->comp_index = 0;
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}
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}
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void PdmOnboardVideo::set_depth_internal(int pitch)
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{
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switch (this->pixel_depth) {
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case 1:
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this->convert_fb_cb = [this](uint8_t* dst_buf, int dst_pitch) {
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this->convert_frame_1bpp(dst_buf, dst_pitch);
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};
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this->fb_pitch = pitch >> 3; // one byte contains 8 pixels
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break;
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case 8:
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this->convert_fb_cb = [this](uint8_t* dst_buf, int dst_pitch) {
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this->convert_frame_8bpp(dst_buf, dst_pitch);
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};
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this->fb_pitch = pitch; // one byte contains 1 pixel
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break;
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default:
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ABORT_F("PDM-Video: pixel depth %d not implemented yet!", this->pixel_depth);
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}
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}
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void PdmOnboardVideo::enable_video_internal()
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{
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int new_width, new_height, hori_blank, vert_blank;
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// ensure all video parameters contain safe values
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switch(this->video_mode) {
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case PdmVideoMode::Portrait:
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case PdmVideoMode::Rgb16in:
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case PdmVideoMode::VGA:
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if (this->pixel_depth > 8) {
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ABORT_F("PDM-Video: no 16bpp support in mode %d!", this->video_mode);
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}
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default:
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break;
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}
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// set video mode parameters
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switch(this->video_mode) {
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case PdmVideoMode::Portrait:
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new_width = 640;
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new_height = 870;
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hori_blank = 192;
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vert_blank = 48;
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this->pixel_clock = 57283200;
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break;
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case PdmVideoMode::Rgb12in:
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new_width = 512;
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new_height = 384;
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hori_blank = 128;
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vert_blank = 23;
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this->pixel_clock = 15667200;
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break;
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case PdmVideoMode::Rgb13in:
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new_width = 640;
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new_height = 480;
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hori_blank = 256;
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vert_blank = 45;
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this->pixel_clock = 31334400;
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break;
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case PdmVideoMode::Rgb16in:
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new_width = 832;
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new_height = 624;
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hori_blank = 320;
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vert_blank = 43;
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this->pixel_clock = 57283200;
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break;
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case PdmVideoMode::VGA:
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new_width = 640;
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new_height = 480;
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hori_blank = 160;
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vert_blank = 45;
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this->pixel_clock = 25175000;
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break;
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default:
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ABORT_F("PDM-Video: invalid video mode %d", this->video_mode);
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}
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if (new_width != this->active_width || new_height != this->active_height) {
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LOG_F(WARNING, "Display window resizing not implemented yet!");
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}
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// figure out where our framebuffer is located
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uint64_t hmc_control = this->hmc_obj->get_control_reg();
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uint32_t fb_base_phys = ((hmc_control >> HMC_VBASE_BIT) & 1) ? 0 : 0x100000;
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LOG_F(INFO, "PDM-Video: framebuffer phys base addr = 0x%X", fb_base_phys);
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// set framebuffer address and pitch
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this->fb_ptr = mmu_get_dma_mem(fb_base_phys, PDM_FB_SIZE_MAX, nullptr);
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this->active_width = new_width;
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this->active_height = new_height;
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this->set_depth_internal(new_width);
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if (this->refresh_task_id) {
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TimerManager::get_instance()->cancel_timer(this->refresh_task_id);
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}
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// set up video refresh timer
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double refresh_rate_hz = (double)(this->pixel_clock) / (new_width + hori_blank) / (new_height + vert_blank);
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LOG_F(INFO, "PDM-Video: refresh rate set to %f Hz", refresh_rate_hz);
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uint64_t refresh_interval = static_cast<uint64_t>(1.0f / refresh_rate_hz * NS_PER_SEC + 0.5);
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this->refresh_task_id = TimerManager::get_instance()->add_cyclic_timer(
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refresh_interval,
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[this]() {
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this->update_screen();
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}
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);
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LOG_F(9, "PDM-Video: video enabled");
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this->crtc_on = true;
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}
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void PdmOnboardVideo::disable_video_internal()
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{
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this->blank_on = true;
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this->blank_display();
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this->blanking = 0x80;
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this->crtc_on = false;
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LOG_F(9, "PDM-Video: video disabled");
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}
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/** Ariel II has a weird 1bpp mode where a white pixel is mapped to
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CLUT entry #127 (%01111111) and a black pixel to #255 (%11111111).
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It requres a non-standard conversion routine implementend below.
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*/
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void PdmOnboardVideo::convert_frame_1bpp(uint8_t *dst_buf, int dst_pitch)
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{
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uint8_t *src_buf, *src_row, pix;
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uint32_t *dst_row;
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int src_pitch, width;
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uint32_t pixels[2];
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// prepare cached ARGB values for white & black pixels
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pixels[0] = this->palette[127];
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pixels[1] = this->palette[255];
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src_buf = this->fb_ptr;
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src_pitch = this->fb_pitch;
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width = this->active_width >> 3;
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for (int h = 0; h < this->active_height; h++) {
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src_row = &src_buf[h * src_pitch];
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dst_row = (uint32_t *)(&dst_buf[h * dst_pitch]);
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for (int x = 0; x < width; x++) {
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pix = src_row[x];
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for (int i = 0; i < 8; i++, pix <<= 1, dst_row++) {
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*dst_row = pixels[(pix >> 7) & 1];
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}
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}
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}
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}
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