void RowInterleaved3D::Present() const
{
FGLPostProcessState savedState;
savedState.SaveTextureBindings(2);
prepareInterleavedPresent(*GLRenderer->mPresent3dRowShader);
// Compute absolute offset from top of screen to top of current display window
// because we need screen-relative, not window-relative, scan line parity
int windowVOffset = 0;
#ifdef _WIN32
if (! fullscreen) {
I_SaveWindowedPos(); // update win_y CVAR
windowVOffset = (win_y + WINDOW_BORDER_VERTICAL_PARITY) % 2;
}
#endif // _WIN32
GLRenderer->mPresent3dRowShader->WindowPositionParity.Set(
(windowVOffset
+ GLRenderer->mOutputLetterbox.height + 1 // +1 because of origin at bottom
) % 2
);
GLRenderer->RenderScreenQuad();
}
void CheckerInterleaved3D::Present() const
{
FGLPostProcessState savedState;
savedState.SaveTextureBindings(2);
prepareInterleavedPresent(*GLRenderer->mPresent3dCheckerShader);
// Compute absolute offset from top of screen to top of current display window
// because we need screen-relative, not window-relative, scan line parity
int windowVOffset = 0;
int windowHOffset = 0;
#ifdef _WIN32
if (!fullscreen) {
I_SaveWindowedPos(); // update win_y CVAR
windowHOffset = (win_x + WINDOW_BORDER_HORIZONTAL_PARITY) % 2;
windowVOffset = (win_y + WINDOW_BORDER_VERTICAL_PARITY) % 2;
}
#endif // _WIN32
GLRenderer->mPresent3dCheckerShader->Uniforms->WindowPositionParity =
(windowVOffset
+ windowHOffset
+ screen->mOutputLetterbox.height + 1 // +1 because of origin at bottom
) % 2; // because we want the top pixel offset, but gl_FragCoord.y is the bottom pixel offset
GLRenderer->mPresent3dCheckerShader->Uniforms.Set();
GLRenderer->RenderScreenQuad();
}
void ColumnInterleaved3D::Present() const
{
FGLPostProcessState savedState;
savedState.SaveTextureBindings(2);
prepareInterleavedPresent(*GLRenderer->mPresent3dColumnShader);
// Compute absolute offset from top of screen to top of current display window
// because we need screen-relative, not window-relative, scan line parity
int windowHOffset = 0;
#ifdef _WIN32
if (!fullscreen) {
I_SaveWindowedPos(); // update win_y CVAR
windowHOffset = (win_x + WINDOW_BORDER_HORIZONTAL_PARITY) % 2;
}
#endif // _WIN32
GLRenderer->mPresent3dColumnShader->WindowPositionParity.Set(windowHOffset);
GLRenderer->RenderScreenQuad();
}
void FGLRenderBuffers::RenderEffect(const FString &name)
{
if (hw_postprocess.Effects[name].Size() == 0)
return;
FGLDebug::PushGroup(name.GetChars());
FGLPostProcessState savedState;
for (const PPStep &step : hw_postprocess.Effects[name])
{
// Bind input textures
for (unsigned int index = 0; index < step.Textures.Size(); index++)
{
savedState.SaveTextureBindings(index + 1);
const PPTextureInput &input = step.Textures[index];
int filter = (input.Filter == PPFilterMode::Nearest) ? GL_NEAREST : GL_LINEAR;
int wrap = (input.Wrap == PPWrapMode::Clamp) ? GL_CLAMP : GL_REPEAT;
switch (input.Type)
{
default:
case PPTextureType::CurrentPipelineTexture:
BindCurrentTexture(index, filter, wrap);
break;
case PPTextureType::NextPipelineTexture:
I_FatalError("PPTextureType::NextPipelineTexture not allowed as input\n");
break;
case PPTextureType::PPTexture:
GLTextures[input.Texture].Bind(index, filter, wrap);
break;
case PPTextureType::SceneColor:
BindSceneColorTexture(index);
break;
case PPTextureType::SceneFog:
BindSceneFogTexture(index);
break;
case PPTextureType::SceneNormal:
BindSceneNormalTexture(index);
break;
case PPTextureType::SceneDepth:
BindSceneDepthTexture(index);
break;
}
}
// Set render target
switch (step.Output.Type)
{
default:
I_FatalError("Unsupported postprocess output type\n");
break;
case PPTextureType::CurrentPipelineTexture:
BindCurrentFB();
break;
case PPTextureType::NextPipelineTexture:
BindNextFB();
break;
case PPTextureType::PPTexture:
if (GLTextureFBs[step.Output.Texture])
GLTextureFBs[step.Output.Texture].Bind();
else
GLTextureFBs[step.Output.Texture] = CreateFrameBuffer(step.Output.Texture.GetChars(), GLTextures[step.Output.Texture]);
break;
case PPTextureType::SceneColor:
BindSceneFB(false);
break;
}
// Set blend mode
if (step.BlendMode.BlendOp == STYLEOP_Add && step.BlendMode.SrcAlpha == STYLEALPHA_One && step.BlendMode.DestAlpha == STYLEALPHA_Zero && step.BlendMode.Flags == 0)
{
glDisable(GL_BLEND);
}
else
{
// To do: support all the modes
glEnable(GL_BLEND);
glBlendEquation(GL_FUNC_ADD);
if (step.BlendMode.SrcAlpha == STYLEALPHA_One && step.BlendMode.DestAlpha == STYLEALPHA_One)
glBlendFunc(GL_ONE, GL_ONE);
else
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
// Setup viewport
glViewport(step.Viewport.left, step.Viewport.top, step.Viewport.width, step.Viewport.height);
auto &shader = GLShaders[step.ShaderName];
// Set uniforms
if (step.Uniforms.Data.Size() > 0)
{
if (!shader->Uniforms)
shader->Uniforms.reset(screen->CreateDataBuffer(POSTPROCESS_BINDINGPOINT, false));
shader->Uniforms->SetData(step.Uniforms.Data.Size(), step.Uniforms.Data.Data());
shader->Uniforms->BindBase();
}
// Set shader
shader->Bind(NOQUEUE);
// Draw the screen quad
GLRenderer->RenderScreenQuad();
// Advance to next PP texture if our output was sent there
if (step.Output.Type == PPTextureType::NextPipelineTexture)
NextTexture();
}
glViewport(screen->mScreenViewport.left, screen->mScreenViewport.top, screen->mScreenViewport.width, screen->mScreenViewport.height);
FGLDebug::PopGroup();
}