XCEngine/engine/src/Rendering/SceneRenderFeaturePass.cpp

#include "Rendering/SceneRenderFeaturePass.h"

#include <XCEngine/Rendering/Graph/RenderGraphRecordingContext.h>
#include <XCEngine/Rendering/RenderPassGraphContract.h>

#include <algorithm>

namespace XCEngine {
namespace Rendering {

bool SceneRenderFeaturePass::RecordRenderGraph(
    const SceneRenderFeaturePassRenderGraphContext& context) {
    const bool usesSourceColor = context.sourceColorTexture.IsValid();
    const bool writesColor =
        std::any_of(
            context.colorTargets.begin(),
            context.colorTargets.end(),
            [](RenderGraphTextureHandle handle) {
                return handle.IsValid();
            });
    const RenderGraphRecordingContext baseRecordingContext =
        BuildRenderGraphRecordingContext(context);
    const RenderSurface sourceSurfaceTemplate =
        baseRecordingContext.sourceSurface != nullptr
            ? *baseRecordingContext.sourceSurface
            : (usesSourceColor ? context.surface : RenderSurface());
    RenderGraphRecordingContextOverrides overrides = {};
    overrides.overrideSourceSurface =
        baseRecordingContext.sourceSurface == nullptr && usesSourceColor;
    overrides.sourceSurface =
        overrides.overrideSourceSurface ? &sourceSurfaceTemplate : nullptr;
    const RenderGraphRecordingContext recordingContext =
        CloneRenderGraphRecordingContext(
            baseRecordingContext,
            overrides);

    const RenderPassGraphBeginCallback beginPassCallback =
        context.beginPassCallback
            ? RenderPassGraphBeginCallback(
                [beginPass = context.beginPassCallback,
                 clearAttachments = context.clearAttachments](
                    const RenderPassContext& passContext) {
                    return beginPass(passContext, clearAttachments);
                })
            : RenderPassGraphBeginCallback();
    const RenderPassRenderGraphContext passContext =
        BuildRenderPassRenderGraphContext(
            recordingContext,
            beginPassCallback,
            context.endPassCallback);
    return RecordRasterRenderPass(
        *this,
        passContext,
        {
            usesSourceColor,
            writesColor,
            context.depthTarget.IsValid()
        });
}

} // namespace Rendering
} // namespace XCEngine