88 lines
2.4 KiB
C#
88 lines
2.4 KiB
C#
using System;
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using WellspringCS;
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namespace MoonWorks.Graphics.Font
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{
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public class TextBatch
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{
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private GraphicsDevice GraphicsDevice { get; }
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public IntPtr Handle { get; }
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public Buffer VertexBuffer { get; protected set; } = null;
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public Buffer IndexBuffer { get; protected set; } = null;
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public Texture Texture { get; protected set; }
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public TextBatch(GraphicsDevice graphicsDevice)
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{
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GraphicsDevice = graphicsDevice;
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Handle = Wellspring.Wellspring_CreateTextBatch();
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}
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public void Start(Packer packer)
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{
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Wellspring.Wellspring_StartTextBatch(Handle, packer.Handle);
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Texture = packer.Texture;
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}
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public unsafe void Draw(float x, float y, float depth, Color color, string text)
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{
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fixed (char* chars = text)
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{
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var byteCount = System.Text.Encoding.UTF8.GetByteCount(text);
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var bytes = stackalloc byte[byteCount];
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System.Text.Encoding.UTF8.GetBytes(chars, text.Length, bytes, byteCount);
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var result = Wellspring.Wellspring_Draw(
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Handle,
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x,
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y,
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depth,
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new Wellspring.Color { R = color.R, G = color.G, B = color.B, A = color.A },
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(IntPtr) bytes,
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(uint) byteCount
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);
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if (result == 0)
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{
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throw new System.ArgumentException("Could not decode string!");
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}
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}
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}
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// Call this after you have made all the Draw calls you want.
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public unsafe void UploadBufferData(CommandBuffer commandBuffer)
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{
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Wellspring.Wellspring_GetBufferData(
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Handle,
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out IntPtr vertexDataPointer,
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out uint vertexDataLengthInBytes,
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out IntPtr indexDataPointer,
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out uint indexDataLengthInBytes
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);
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if (VertexBuffer == null)
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{
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VertexBuffer = new Buffer(GraphicsDevice, BufferUsageFlags.Vertex, vertexDataLengthInBytes);
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}
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else if (VertexBuffer.Size < vertexDataLengthInBytes)
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{
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VertexBuffer.Dispose();
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VertexBuffer = new Buffer(GraphicsDevice, BufferUsageFlags.Vertex, vertexDataLengthInBytes);
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}
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if (IndexBuffer == null)
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{
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IndexBuffer = new Buffer(GraphicsDevice, BufferUsageFlags.Index, indexDataLengthInBytes);
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}
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else if (IndexBuffer.Size < indexDataLengthInBytes)
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{
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IndexBuffer.Dispose();
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IndexBuffer = new Buffer(GraphicsDevice, BufferUsageFlags.Index, indexDataLengthInBytes);
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}
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commandBuffer.SetBufferData(VertexBuffer, vertexDataPointer, 0, vertexDataLengthInBytes);
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commandBuffer.SetBufferData(IndexBuffer, indexDataPointer, 0, indexDataLengthInBytes);
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}
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}
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}
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