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60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
//
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// CRTContants.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 19/03/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#ifndef CRTConstants_h
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#define CRTConstants_h
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#include "OpenGL.hpp"
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#include <cstddef>
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namespace Outputs {
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namespace CRT {
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// Output vertices are those used to copy from an input buffer — whether it describes data that maps directly to RGB
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// or is one of the intermediate buffers that we've used to convert from composite towards RGB.
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const GLsizei OutputVertexOffsetOfPosition = 0;
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const GLsizei OutputVertexOffsetOfTexCoord = 4;
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const GLsizei OutputVertexOffsetOfTimestamp = 8;
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const GLsizei OutputVertexOffsetOfLateral = 12;
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const GLsizei OutputVertexOffsetOfFrameID = 13;
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const GLsizei OutputVertexSize = 16;
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// Input vertices, used only in composite mode, map from the input buffer to temporary buffer locations; such
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// remapping occurs to ensure a continous stream of data for each scan, giving correct out-of-bounds behaviour
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const GLsizei SourceVertexOffsetOfInputPosition = 0;
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const GLsizei SourceVertexOffsetOfOutputPosition = 4;
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const GLsizei SourceVertexOffsetOfPhaseAmplitudeAndOffset = 8;
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const GLsizei SourceVertexOffsetOfPhaseTime = 12;
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const GLsizei SourceVertexSize = 16;
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// These constants hold the size of the rolling buffer to which the CPU writes
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const GLsizei InputBufferBuilderWidth = 2048;
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const GLsizei InputBufferBuilderHeight = 1024;
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// This is the size of the intermediate buffers used during composite to RGB conversion
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const GLsizei IntermediateBufferWidth = 2048;
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const GLsizei IntermediateBufferHeight = 2048;
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// Some internal buffer sizes
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const GLsizeiptr OutputVertexBufferDataSize = 262080; // a multiple of 6 * OutputVertexSize
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const GLsizeiptr SourceVertexBufferDataSize = 87360; // a multiple of 2 * SourceVertexSize
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// Runs are divided discretely by vertical syncs in order to put a usable bounds on the uniform used to track
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// run age; that therefore creates a discrete number of fields that are stored. This number should be the
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// number of historic fields that are required fully to complete a frame. It should be at least two and not
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// more than four.
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const int NumberOfFields = 4;
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}
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}
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#endif /* CRTContants_h */
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