sRGB support for D3D9

src/image.cpp

@@ -1895,6 +1895,7 @@ namespace bgfx
 		_imageContainer.m_hasAlpha = hasAlpha;
 		_imageContainer.m_cubeMap  = numFaces > 1;
 		_imageContainer.m_ktx = false;
+		_imageContainer.m_srgb = colorSpace > 0;
 
 		return TextureFormat::Unknown != format;
 	}

src/renderer_d3d9.cpp

@@ -1077,6 +1077,8 @@ namespace bgfx { namespace d3d9
 					DX_CHECK(m_device->SetRenderTarget(ii, NULL) );
 				}
 				DX_CHECK(m_device->SetDepthStencilSurface(m_backBufferDepthStencil) );
+
+				DX_CHECK(m_device->SetRenderState(D3DRS_SRGBWRITEENABLE, 0 != (m_flags & BGFX_RESET_SRGB_BACKBUFFER) ));
 			}
 			else
 			{
@@ -1098,6 +1100,8 @@ namespace bgfx { namespace d3d9
 
 				IDirect3DSurface9* depthStencil = frameBuffer.m_depthStencil;
 				DX_CHECK(m_device->SetDepthStencilSurface(NULL != depthStencil ? depthStencil : m_backBufferDepthStencil) );
+
+				DX_CHECK(m_device->SetRenderState(D3DRS_SRGBWRITEENABLE, FALSE) );
 			}
 
 			m_fbh = _fbh;
@@ -1288,7 +1292,7 @@ namespace bgfx { namespace d3d9
 
 		void setSamplerState(uint8_t _stage, uint32_t _flags, bool _vertex = false)
 		{
-			const uint32_t flags = _flags&( (~BGFX_TEXTURE_RESERVED_MASK) | BGFX_TEXTURE_SAMPLER_BITS_MASK);
+			const uint32_t flags = _flags&( (~BGFX_TEXTURE_RESERVED_MASK) | BGFX_TEXTURE_SAMPLER_BITS_MASK | BGFX_TEXTURE_SRGB);
 			BX_CHECK(_stage < BX_COUNTOF(m_samplerFlags), "");
 			if (m_samplerFlags[_stage][_vertex] != flags)
 			{
@@ -1310,6 +1314,7 @@ namespace bgfx { namespace d3d9
 				DX_CHECK(device->SetSamplerState(stage, D3DSAMP_MAGFILTER, magFilter) );
 				DX_CHECK(device->SetSamplerState(stage, D3DSAMP_MIPFILTER, mipFilter) );
 				DX_CHECK(device->SetSamplerState(stage, D3DSAMP_MAXANISOTROPY, m_maxAnisotropy) );
+				DX_CHECK(device->SetSamplerState(stage, D3DSAMP_SRGBTEXTURE, 0 != (flags & BGFX_TEXTURE_SRGB)) );
 			}
 		}
 
@@ -2423,6 +2428,11 @@ namespace bgfx { namespace d3d9
 				createTexture(textureWidth, textureHeight, numMips);
 			}
 
+			if (imageContainer.m_srgb)
+			{
+				m_flags |= BGFX_TEXTURE_SRGB;
+			}
+
 			BX_TRACE("Texture %3d: %s (requested: %s), %dx%d%s%s."
 				, this - s_renderD3D9->m_textures
 				, getName( (TextureFormat::Enum)m_textureFormat)