void TexRegionRender::Render( DeviceContextGLImpl *pCtxGL,
ITextureView *pSrcSRV,
RESOURCE_DIMENSION TexType,
TEXTURE_FORMAT TexFormat,
Int32 DstToSrcXOffset,
Int32 DstToSrcYOffset,
Int32 SrcZ,
Int32 SrcMipLevel)
{
{
MapHelper< int > pConstant( pCtxGL, m_pConstantBuffer, MAP_WRITE_DISCARD, 0 );
pConstant[0] = DstToSrcXOffset;
pConstant[1] = DstToSrcYOffset;
pConstant[2] = SrcZ;
pConstant[3] = SrcMipLevel;
}
const auto &TexFmtAttribs = GetTextureFormatAttribs(TexFormat);
Uint32 FSInd = TexType * 3;
if( TexFmtAttribs.ComponentType == COMPONENT_TYPE_SINT )
FSInd += 1;
else if( TexFmtAttribs.ComponentType == COMPONENT_TYPE_UINT )
FSInd += 2;
if( TexFmtAttribs.ComponentType == COMPONENT_TYPE_SNORM )
{
LOG_WARNING_MESSAGE("CopyData() is performed by rendering to texture.\n"
"There might be an issue in OpenGL driver on NVidia hardware: when rendering to SNORM textures, all negative values are clamped to zero.")
}
pCtxGL->SetPipelineState(m_pPSO[FSInd]);
auto SrcTexVar = m_pFragmentShaders[FSInd]->GetShaderVariable( "gSourceTex" );
SrcTexVar->Set( pSrcSRV );
DrawAttribs DrawAttrs;
DrawAttrs.NumVertices = 4;
DrawAttrs.Topology = PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP;
pCtxGL->Draw( DrawAttrs );
SrcTexVar->Set( nullptr );
}
static TextureDesc GetTextureDescFromGLHandle(DeviceContextGLImpl *pDeviceContextGL, TextureDesc TexDesc, GLuint GLHandle, GLenum BindTarget)
{
auto &ContextState = pDeviceContextGL->GetContextState();
VERIFY(BindTarget != GL_TEXTURE_CUBE_MAP_ARRAY, "Cubemap arrays are not currently supported")
GLObjectWrappers::GLTextureObj TmpGLTexWrapper(true, GLObjectWrappers::GLTextureCreateReleaseHelper(GLHandle));
ContextState.BindTexture(-1, BindTarget, TmpGLTexWrapper);
GLenum QueryBindTarget = BindTarget;
if (BindTarget == GL_TEXTURE_CUBE_MAP)
QueryBindTarget = GL_TEXTURE_CUBE_MAP_POSITIVE_X;
GLint TexWidth = 0, TexHeight = 0, TexDepth = 0;
glGetTexLevelParameteriv(QueryBindTarget, 0, GL_TEXTURE_WIDTH, &TexWidth);
if (TexDesc.Type >= RESOURCE_DIM_TEX_2D)
glGetTexLevelParameteriv(QueryBindTarget, 0, GL_TEXTURE_HEIGHT, &TexHeight);
else
TexHeight = 1;
if (TexDesc.Type == RESOURCE_DIM_TEX_3D)
glGetTexLevelParameteriv(QueryBindTarget, 0, GL_TEXTURE_DEPTH, &TexDepth);
else
TexDepth = 1;
GLint GlFormat = 0;
glGetTexLevelParameteriv(QueryBindTarget, 0, GL_TEXTURE_INTERNAL_FORMAT, &GlFormat);
CHECK_GL_ERROR( "Failed to get texture level 0 parameters through glGetTexLevelParameteriv()" );
VERIFY(GlFormat != 0, "Unable to get texture format")
if (TexDesc.Format != TEX_FORMAT_UNKNOWN)
VERIFY(static_cast<GLenum>(GlFormat) == TexFormatToGLInternalTexFormat(TexDesc.Format), "Specified texture format (", GetTextureFormatAttribs(TexDesc.Format).Name,") does not match GL texture internal format (", GlFormat, ")")
else
TexDesc.Format = GLInternalTexFormatToTexFormat(GlFormat);
VERIFY_EXPR(TexWidth > 0 && TexHeight > 0 && TexDepth > 0);
VERIFY(TexDesc.Width == 0 || TexDesc.Width == static_cast<Uint32>(TexWidth), "Specified texture width (", TexDesc.Width, ") does not match the actual width (", TexWidth, ")");
VERIFY(TexDesc.Height == 0 || TexDesc.Height == static_cast<Uint32>(TexHeight), "Specified texture height (", TexDesc.Height,") does not match the actual height (", TexHeight, ")");
TexDesc.Width = static_cast<Uint32>(TexWidth);
TexDesc.Height = static_cast<Uint32>(TexHeight);
if (TexDesc.Type == RESOURCE_DIM_TEX_3D)
{
VERIFY(TexDesc.Depth == 0 || TexDesc.Depth == static_cast<Uint32>(TexDepth), "Specified texture depth (", TexDesc.Depth, ") does not match the actual depth (", TexDepth, ")");
TexDesc.Depth = static_cast<Uint32>(TexDepth);
}
GLint MipLevels = 0;
glGetTexParameteriv(BindTarget, GL_TEXTURE_IMMUTABLE_LEVELS, &MipLevels);
CHECK_GL_ERROR( "Failed to get texture parameters through glGetTexParameteriv()" );
VERIFY(TexDesc.MipLevels == 0 || TexDesc.MipLevels == static_cast<Uint32>(MipLevels), "Specified number of mip levels (", TexDesc.MipLevels, ") does not match the actual number of mip levels (", MipLevels, ")");
TexDesc.MipLevels = static_cast<Uint32>(MipLevels);
ContextState.BindTexture(-1, BindTarget, GLObjectWrappers::GLTextureObj(false) );
return TexDesc;
}