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104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "../Core/IRenderingDevice.h"
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#include "../Core/VideoRenderer.h"
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#include "../Core/EmulationSettings.h"
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#include "../Core/Console.h"
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#include "../Utilities/nes_ntsc.h"
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#include "libretro.h"
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class LibretroRenderer : public IRenderingDevice
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{
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private:
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shared_ptr<Console> _console;
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retro_video_refresh_t _sendFrame = nullptr;
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retro_environment_t _retroEnv = nullptr;
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bool _skipMode = false;
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int32_t _previousHeight = -1;
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int32_t _previousWidth = -1;
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public:
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LibretroRenderer(shared_ptr<Console> console, retro_environment_t retroEnv)
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{
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_console = console;
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_retroEnv = retroEnv;
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_console->GetVideoRenderer()->RegisterRenderingDevice(this);
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}
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~LibretroRenderer()
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{
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_console->GetVideoRenderer()->UnregisterRenderingDevice(this);
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}
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// Inherited via IRenderingDevice
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virtual void UpdateFrame(void *frameBuffer, uint32_t width, uint32_t height) override
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{
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if(!_skipMode && _sendFrame) {
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//Use Blargg's NTSC filter's max size as a minimum resolution, to prevent changing resolution too often
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int32_t newWidth = std::max<int32_t>(width, NES_NTSC_OUT_WIDTH(256));
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int32_t newHeight = std::max<int32_t>(height, 240);
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if(_retroEnv != nullptr && (_previousWidth != newWidth || _previousHeight != newHeight)) {
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//Resolution change is needed
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retro_system_av_info avInfo = {};
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GetSystemAudioVideoInfo(avInfo, newWidth, newHeight);
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_retroEnv(RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO, &avInfo);
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_previousWidth = newWidth;
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_previousHeight = newHeight;
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}
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_sendFrame(frameBuffer, width, height, sizeof(uint32_t) * width);
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}
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}
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void GetSystemAudioVideoInfo(retro_system_av_info &info, int32_t maxWidth = 0, int32_t maxHeight = 0)
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{
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info.timing.fps = _console->GetModel() == NesModel::NTSC ? 60.098811862348404716732985230828 : 50.006977968268290848936010226333;
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info.timing.sample_rate = _console->GetSettings()->GetSampleRate();
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float ratio = (float)_console->GetSettings()->GetAspectRatio(_console);
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if(ratio == 0.0f) {
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ratio = (float)256 / 240;
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}
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ratio *= (float)_console->GetSettings()->GetOverscanDimensions().GetScreenWidth() / _console->GetSettings()->GetOverscanDimensions().GetScreenHeight() / 256 * 240;
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if(_console->GetSettings()->GetScreenRotation() % 180) {
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info.geometry.aspect_ratio = ratio == 0.0f ? 0.0f : 1.0f / ratio;
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} else {
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info.geometry.aspect_ratio = ratio;
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}
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info.geometry.base_width = _console->GetSettings()->GetOverscanDimensions().GetScreenWidth();
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info.geometry.base_height = _console->GetSettings()->GetOverscanDimensions().GetScreenHeight();
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info.geometry.max_width = maxWidth;
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info.geometry.max_height = maxHeight;
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if(maxHeight > 0 && maxWidth > 0) {
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_previousWidth = maxWidth;
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_previousHeight = maxHeight;
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}
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}
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void SetVideoCallback(retro_video_refresh_t sendFrame)
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{
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_sendFrame = sendFrame;
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}
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void SetSkipMode(bool skip)
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{
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_skipMode = skip;
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}
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virtual void Render() override
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{
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}
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virtual void Reset() override
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{
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}
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virtual void SetFullscreenMode(bool fullscreen, void *windowHandle, uint32_t monitorWidth, uint32_t monitorHeight) override
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{
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}
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}; |