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GitHub Repository: hrydgard/ppsspp
 Path: blob/master/libretro/LibretroD3D11Context.cpp
Views: 1401
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#include "Common/Log.h"

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#include "Core/Config.h"

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#include "Core/ConfigValues.h"

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#include "libretro/LibretroD3D11Context.h"

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#include "Common/GPU/D3D11/D3D11Loader.h"

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#include <d3d11_1.h>

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#ifdef __MINGW32__

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#undef __uuidof

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#define __uuidof(type) IID_##type

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#endif

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bool LibretroD3D11Context::Init() {

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	if (!LibretroHWRenderContext::Init(true))

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		return false;

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	g_Config.iGPUBackend = (int)GPUBackend::DIRECT3D11;

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	return true;

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}

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void LibretroD3D11Context::CreateDrawContext() {

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	std::vector<std::string> adapterNames;

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	if (!Libretro::environ_cb(RETRO_ENVIRONMENT_GET_HW_RENDER_INTERFACE, (void **)&d3d11_) || !d3d11_) {

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		ERROR_LOG(Log::G3D, "Failed to get HW rendering interface!\n");

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		return;

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	}

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	if (d3d11_->interface_version != RETRO_HW_RENDER_INTERFACE_D3D11_VERSION) {

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		ERROR_LOG(Log::G3D, "HW render interface mismatch, expected %u, got %u!\n", RETRO_HW_RENDER_INTERFACE_D3D11_VERSION, d3d11_->interface_version);

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		return;

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	}

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   // Reject lower feature levels. We have D3D9 for these ancient GPUs.

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   if (d3d11_->featureLevel < D3D_FEATURE_LEVEL_10_0) {

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      ERROR_LOG(Log::G3D, "D3D11 featureLevel not high enough - rejecting!\n");

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      return;

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   }

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	ptr_D3DCompile = d3d11_->D3DCompile;

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	ID3D11Device1 *device1 = nullptr;

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	d3d11_->device->QueryInterface(__uuidof(ID3D11Device1), (void **)&device1);

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	ID3D11DeviceContext1 *context1 = nullptr;

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	d3d11_->context->QueryInterface(__uuidof(ID3D11DeviceContext1), (void **)&context1);

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	draw_ = Draw::T3DCreateD3D11Context(d3d11_->device, d3d11_->context, device1, context1, nullptr, d3d11_->featureLevel, NULL, adapterNames, 3);

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}

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void LibretroD3D11Context::DestroyDrawContext() {

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	LibretroHWRenderContext::DestroyDrawContext();

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	d3d11_ = nullptr;

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}

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void LibretroD3D11Context::GotBackbuffer() {

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	D3D11_TEXTURE2D_DESC desc{};

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	desc.Width = PSP_CoreParameter().pixelWidth;

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	desc.Height = PSP_CoreParameter().pixelHeight;

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	desc.MipLevels = 1;

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	desc.ArraySize = 1;

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	desc.Format = format_;

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	desc.SampleDesc.Count = 1;

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	desc.SampleDesc.Quality = 0;

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	desc.Usage = D3D11_USAGE_DEFAULT;

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	desc.BindFlags = D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE;

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	desc.CPUAccessFlags = 0;

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	desc.MiscFlags = 0;

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	if (SUCCEEDED(d3d11_->device->CreateTexture2D(&desc, nullptr, &texture_))) {

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		if (SUCCEEDED(d3d11_->device->CreateRenderTargetView(texture_, nullptr, &RTView_))) {

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			if (SUCCEEDED(d3d11_->device->CreateShaderResourceView(texture_, nullptr, &SRView_))) {

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				draw_->HandleEvent(Draw::Event::GOT_BACKBUFFER, PSP_CoreParameter().pixelWidth, PSP_CoreParameter().pixelHeight, RTView_, texture_);

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				return;

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			}

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			RTView_->Release();

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			RTView_ = nullptr;

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		}

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		texture_->Release();

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		texture_ = nullptr;

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	}

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}

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void LibretroD3D11Context::LostBackbuffer() {

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	LibretroGraphicsContext::LostBackbuffer();

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	SRView_->Release();

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	SRView_ = nullptr;

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	RTView_->Release();

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	RTView_ = nullptr;

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	texture_->Release();

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	texture_ = nullptr;

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}

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void LibretroD3D11Context::SwapBuffers() {

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	ID3D11RenderTargetView *nullView = nullptr;

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	d3d11_->context->OMSetRenderTargets(1, &nullView, nullptr);

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	d3d11_->context->PSSetShaderResources(0, 1, &SRView_);

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	LibretroHWRenderContext::SwapBuffers();

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	ID3D11ShaderResourceView *nullSRV = nullptr;

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	d3d11_->context->PSSetShaderResources(0, 1, &nullSRV);

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	draw_->HandleEvent(Draw::Event::PRESENTED, 0, 0, nullptr, nullptr);

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}

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