D3D11渲染流程笔记

渲染流程

• gs_effect_set_vec4(color, colorVal); //参数到effect buffer
• gs_technique_begin_pass
  • gs_load_vertexshader
    • ID3D11DeviceContext::VSSetShader - 设置顶点着色器
    • ID3D11DeviceContext::IASetInputLayout - 设置顶点着色器的参数布局
    • ID3D11DeviceContext::VSSetConstantBuffers - 设置顶点着色器常量空间
  • gs_load_pixelshader
    • ID3D11DeviceContext::PSSetShader 设置像素着色器
    • ID3D11DeviceContext::PSSetConstantBuffers 设置像素着器常量空间
    • ID3D11DeviceContext::PSSetSamplers 设置采样状态
  • upload_parameters(tech->effect, false)
    • upload_shader_params(vshader_params, changed_only);
      • gs_shader_set_val（）// effect buffer -> gs buffer
    • upload_shader_params(pshader_params, changed_only);
      • gs_shader_set_val
• gs_draw_sprite(0, 0, context->width, context->height)
  • gs_vertexbuffer_flush(graphics->sprite_buffer); //map unmap更新显卡内部顶点数据
  • gs_load_vertexbuffer(graphics->sprite_buffer); //设置curVertexBuffer为graphics->sprite_buffer
  • gs_load_indexbuffer(NULL); //顶点索引没有用
  • gs_draw(GS_TRISTRIP, 0, 0)
    • device->FlushOutputViews();//设置OMSetRenderTargets
    • gs_effect_update_params(effect)
      • upload_parameters(effect, true)
    • device->LoadVertexBufferData(); //IASetVertexBuffers
    • device->UpdateBlendState(); //OMSetBlendState
    • device->UpdateRasterState(); //光栅化配置
    • device->UpdateZStencilState(); //OMSetDepthStencilState
    • device->UpdateViewProjMatrix();
    • device->curVertexShader->UploadParams();//更新顶点着色器参数到着色器常量空间
    • device->curPixelShader->UploadParams(); //更新像系着色器参数到着色器常量空间
    • device->context->Draw(num_verts, start_vert); //最终绘制D3D11DeviceContext::Draw