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/*
* Copyright 2019-2021 Diligent Graphics LLC
* Copyright 2015-2019 Egor Yusov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#include "pch.h"
#include "TexRegionRender.hpp"
#include "RenderDeviceGLImpl.hpp"
#include "DeviceContextGLImpl.hpp"
#include "../../GraphicsTools/interface/MapHelper.hpp"
namespace Diligent
{
// clang-format off
static const Char* VertexShaderSource =
{
//To use any built-in input or output in the gl_PerVertex and
//gl_PerFragment blocks in separable program objects, shader code must
//redeclare those blocks prior to use.
//
// Declaring this block causes compilation error on NVidia GLES
"#ifndef GL_ES \n"
"out gl_PerVertex \n"
"{ \n"
" vec4 gl_Position; \n"
"}; \n"
"#endif \n"
"void main() \n"
"{ \n"
" vec4 Bounds = vec4(-1.0, -1.0, 1.0, 1.0); \n"
" vec2 PosXY[4]; \n"
" PosXY[0] = Bounds.xy; \n"
" PosXY[1] = Bounds.xw; \n"
" PosXY[2] = Bounds.zy; \n"
" PosXY[3] = Bounds.zw; \n"
" gl_Position = vec4(PosXY[gl_VertexID], 0.0, 1.0);\n"
"} \n"
};
// clang-format on
TexRegionRender::TexRegionRender(class RenderDeviceGLImpl* pDeviceGL)
{
ShaderCreateInfo ShaderAttrs;
ShaderAttrs.Desc.Name = "TexRegionRender : Vertex shader";
ShaderAttrs.Desc.ShaderType = SHADER_TYPE_VERTEX;
ShaderAttrs.Source = VertexShaderSource;
constexpr bool IsInternalDeviceObject = true;
pDeviceGL->CreateShader(ShaderAttrs, &m_pVertexShader, IsInternalDeviceObject);
static const char* SamplerType[RESOURCE_DIM_NUM_DIMENSIONS] = {};
SamplerType[RESOURCE_DIM_TEX_1D] = "sampler1D";
SamplerType[RESOURCE_DIM_TEX_1D_ARRAY] = "sampler1DArray";
SamplerType[RESOURCE_DIM_TEX_2D] = "sampler2D";
SamplerType[RESOURCE_DIM_TEX_2D_ARRAY] = "sampler2DArray",
SamplerType[RESOURCE_DIM_TEX_3D] = "sampler3D";
// There is no texelFetch() for texture cube [array]
//SamplerType[RESOURCE_DIM_TEX_CUBE] = "samplerCube";
//SamplerType[RESOURCE_DIM_TEX_CUBE_ARRAY] = "smaplerCubeArray";
static const char* SrcLocations[RESOURCE_DIM_NUM_DIMENSIONS] = {};
SrcLocations[RESOURCE_DIM_TEX_1D] = "int(gl_FragCoord.x) + Constants.x";
SrcLocations[RESOURCE_DIM_TEX_1D_ARRAY] = "ivec2(int(gl_FragCoord.x) + Constants.x, Constants.z)";
SrcLocations[RESOURCE_DIM_TEX_2D] = "ivec2(gl_FragCoord.xy) + Constants.xy";
SrcLocations[RESOURCE_DIM_TEX_2D_ARRAY] = "ivec3(ivec2(gl_FragCoord.xy) + Constants.xy, Constants.z)",
SrcLocations[RESOURCE_DIM_TEX_3D] = "ivec3(ivec2(gl_FragCoord.xy) + Constants.xy, Constants.z)";
// There is no texelFetch() for texture cube [array]
//CoordDim[RESOURCE_DIM_TEX_CUBE] = "ivec2(gl_FragCoord.xy)";
//CoordDim[RESOURCE_DIM_TEX_CUBE_ARRAY] = "ivec2(gl_FragCoord.xy)";
BufferDesc CBDesc;
CBDesc.Name = "TexRegionRender: FS constants CB";
CBDesc.uiSizeInBytes = sizeof(Int32) * 4;
CBDesc.Usage = USAGE_DYNAMIC;
CBDesc.BindFlags = BIND_UNIFORM_BUFFER;
CBDesc.CPUAccessFlags = CPU_ACCESS_WRITE;
pDeviceGL->CreateBuffer(CBDesc, nullptr, &m_pConstantBuffer, IsInternalDeviceObject);
GraphicsPipelineStateCreateInfo PSOCreateInfo;
auto& GraphicsPipeline = PSOCreateInfo.GraphicsPipeline;
GraphicsPipeline.RasterizerDesc.CullMode = CULL_MODE_NONE;
GraphicsPipeline.RasterizerDesc.FillMode = FILL_MODE_SOLID;
GraphicsPipeline.DepthStencilDesc.DepthEnable = False;
GraphicsPipeline.DepthStencilDesc.DepthWriteEnable = False;
PSOCreateInfo.pVS = m_pVertexShader;
GraphicsPipeline.PrimitiveTopology = PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP;
static const char* CmpTypePrefix[3] = {"", "i", "u"};
for (Int32 Dim = RESOURCE_DIM_TEX_2D; Dim <= RESOURCE_DIM_TEX_3D; ++Dim)
{
const auto* SamplerDim = SamplerType[Dim];
const auto* SrcLocation = SrcLocations[Dim];
for (Int32 Fmt = 0; Fmt < 3; ++Fmt)
{
const auto* Prefix = CmpTypePrefix[Fmt];
String Name = "TexRegionRender : Pixel shader ";
Name.append(Prefix);
Name.append(SamplerDim);
ShaderAttrs.Desc.Name = Name.c_str();
ShaderAttrs.Desc.ShaderType = SHADER_TYPE_PIXEL;
std::stringstream SourceSS;
SourceSS << "uniform " << Prefix << SamplerDim << " gSourceTex;\n"
<< "layout(location = 0) out " << Prefix
<< "vec4 Out;\n"
"uniform cbConstants\n"
"{\n"
" ivec4 Constants;\n"
"};\n"
"void main()\n"
"{\n"
" Out = texelFetch( gSourceTex, "
<< SrcLocation
<< ", Constants.w );\n"
"}\n";
auto Source = SourceSS.str();
ShaderAttrs.Source = Source.c_str();
auto& FragmetShader = m_pFragmentShaders[Dim * 3 + Fmt];
pDeviceGL->CreateShader(ShaderAttrs, &FragmetShader, IsInternalDeviceObject);
PSOCreateInfo.pPS = FragmetShader;
auto& ResourceLayout = PSOCreateInfo.PSODesc.ResourceLayout;
ResourceLayout.DefaultVariableType = SHADER_RESOURCE_VARIABLE_TYPE_DYNAMIC;
ShaderResourceVariableDesc Vars[] =
{
{SHADER_TYPE_PIXEL, "cbConstants", SHADER_RESOURCE_VARIABLE_TYPE_MUTABLE} //
};
ResourceLayout.NumVariables = _countof(Vars);
ResourceLayout.Variables = Vars;
pDeviceGL->CreateGraphicsPipelineState(PSOCreateInfo, &m_pPSO[Dim * 3 + Fmt], IsInternalDeviceObject);
}
}
m_pPSO[RESOURCE_DIM_TEX_2D * 3]->CreateShaderResourceBinding(&m_pSRB);
m_pSRB->GetVariableByName(SHADER_TYPE_PIXEL, "cbConstants")->Set(m_pConstantBuffer);
m_pSrcTexVar = m_pSRB->GetVariableByName(SHADER_TYPE_PIXEL, "gSourceTex");
}
void TexRegionRender::SetStates(DeviceContextGLImpl* pCtxGL)
{
pCtxGL->GetRenderTargets(m_NumRenderTargets, m_pOrigRTVs, &m_pOrigDSV);
Uint32 NumViewports = 0;
pCtxGL->GetViewports(NumViewports, nullptr);
m_OrigViewports.resize(NumViewports);
pCtxGL->GetViewports(NumViewports, m_OrigViewports.data());
pCtxGL->GetPipelineState(&m_pOrigPSO, m_OrigBlendFactors, m_OrigStencilRef);
}
void TexRegionRender::RestoreStates(DeviceContextGLImpl* pCtxGL)
{
pCtxGL->SetRenderTargets(m_NumRenderTargets, m_pOrigRTVs, m_pOrigDSV, RESOURCE_STATE_TRANSITION_MODE_TRANSITION);
for (Uint32 rt = 0; rt < _countof(m_pOrigRTVs); ++rt)
{
if (m_pOrigRTVs[rt])
m_pOrigRTVs[rt]->Release();
m_pOrigRTVs[rt] = nullptr;
}
m_pOrigDSV.Release();
pCtxGL->SetViewports((Uint32)m_OrigViewports.size(), m_OrigViewports.data(), 0, 0);
if (m_pOrigPSO)
pCtxGL->SetPipelineState(m_pOrigPSO);
m_pOrigPSO.Release();
pCtxGL->SetStencilRef(m_OrigStencilRef);
pCtxGL->SetBlendFactors(m_OrigBlendFactors);
}
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, MAP_FLAG_DISCARD);
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.");
}
DEV_CHECK_ERR(m_pPSO[FSInd], "TexRegionRender does not support this combination of texture dimension/format");
pCtxGL->SetPipelineState(m_pPSO[FSInd]);
m_pSrcTexVar->Set(pSrcSRV);
pCtxGL->CommitShaderResources(m_pSRB, RESOURCE_STATE_TRANSITION_MODE_TRANSITION);
DrawAttribs DrawAttrs;
DrawAttrs.NumVertices = 4;
pCtxGL->Draw(DrawAttrs);
m_pSrcTexVar->Set(nullptr);
}
} // namespace Diligent
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