xbmc/pictures/SlideShowPictureDX.cpp

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "SlideShowPictureDX.h"
  10
  11 #include "guilib/TextureDX.h"
  12 #include "rendering/dx/DeviceResources.h"
  13 #include "rendering/dx/RenderContext.h"
  14
  15 #include <DirectXMath.h>
  16 using namespace DirectX;
  17 using namespace Microsoft::WRL;
  18
  19 std::unique_ptr<CSlideShowPic> CSlideShowPic::CreateSlideShowPicture()
  20 {
  21   return std::make_unique<CSlideShowPicDX>();
  22 }
  23
  24 bool CSlideShowPicDX::UpdateVertexBuffer(Vertex* vertices)
  25 {
  26   if (!m_vb) // create new
  27   {
  28     CD3D11_BUFFER_DESC desc(sizeof(Vertex) * 5, D3D11_BIND_VERTEX_BUFFER, D3D11_USAGE_DYNAMIC,
  29                             D3D11_CPU_ACCESS_WRITE);
  30     D3D11_SUBRESOURCE_DATA initData = {};
  31     initData.pSysMem = vertices;
  32     initData.SysMemPitch = sizeof(Vertex) * 5;
  33     if (SUCCEEDED(DX::DeviceResources::Get()->GetD3DDevice()->CreateBuffer(
  34             &desc, &initData, m_vb.ReleaseAndGetAddressOf())))
  35       return true;
  36   }
  37   else // update
  38   {
  39     ID3D11DeviceContext* pContext = DX::DeviceResources::Get()->GetD3DContext();
  40     D3D11_MAPPED_SUBRESOURCE res;
  41     if (SUCCEEDED(pContext->Map(m_vb.Get(), 0, D3D11_MAP_WRITE_DISCARD, 0, &res)))
  42     {
  43       memcpy(res.pData, vertices, sizeof(Vertex) * 5);
  44       pContext->Unmap(m_vb.Get(), 0);
  45       return true;
  46     }
  47   }
  48
  49   return false;
  50 }
  51
  52 void CSlideShowPicDX::Render(float* x,
  53                              float* y,
  54                              CTexture* pTexture,
  55                              KODI::UTILS::COLOR::Color color)
  56 {
  57   Vertex vertex[5];
  58   for (int i = 0; i < 4; i++)
  59   {
  60     vertex[i].pos = XMFLOAT3(x[i], y[i], 0);
  61     CD3DHelper::XMStoreColor(&vertex[i].color, color);
  62     vertex[i].texCoord = XMFLOAT2(0.0f, 0.0f);
  63     vertex[i].texCoord2 = XMFLOAT2(0.0f, 0.0f);
  64   }
  65
  66   if (pTexture)
  67   {
  68     vertex[1].texCoord.x = vertex[2].texCoord.x =
  69         (float)pTexture->GetWidth() / pTexture->GetTextureWidth();
  70     vertex[2].texCoord.y = vertex[3].texCoord.y =
  71         (float)pTexture->GetHeight() / pTexture->GetTextureHeight();
  72   }
  73   else
  74   {
  75     vertex[1].texCoord.x = vertex[2].texCoord.x = 1.0f;
  76     vertex[2].texCoord.y = vertex[3].texCoord.y = 1.0f;
  77   }
  78   vertex[4] = vertex[0]; // Not used when pTexture != NULL
  79
  80   CGUIShaderDX* pGUIShader = DX::Windowing()->GetGUIShader();
  81   pGUIShader->Begin(SHADER_METHOD_RENDER_TEXTURE_BLEND);
  82
  83   // Set state to render the image
  84   if (pTexture)
  85   {
  86     pTexture->LoadToGPU();
  87     CDXTexture* dxTexture = reinterpret_cast<CDXTexture*>(pTexture);
  88     ID3D11ShaderResourceView* shaderRes = dxTexture->GetShaderResource();
  89     pGUIShader->SetShaderViews(1, &shaderRes);
  90     pGUIShader->DrawQuad(vertex[0], vertex[1], vertex[2], vertex[3]);
  91   }
  92   else
  93   {
  94     if (!UpdateVertexBuffer(vertex))
  95       return;
  96
  97     ComPtr<ID3D11DeviceContext> pContext = DX::DeviceResources::Get()->GetD3DContext();
  98
  99     unsigned stride = sizeof(Vertex);
 100     unsigned offset = 0;
 101     pContext->IASetVertexBuffers(0, 1, m_vb.GetAddressOf(), &stride, &offset);
 102     pContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_LINESTRIP);
 103
 104     pGUIShader->Draw(5, 0);
 105     pGUIShader->RestoreBuffers();
 106   }
 107 }