public void SetArrayByBlock()
{
ArrayBufferObjectBase arrayBuffer1 = null, arrayBuffer2 = null, arrayBuffer3 = null;
try {
arrayBuffer1 = new ArrayBufferObject(VertexBaseType.Float, 3, BufferObjectHint.StaticCpuDraw);
arrayBuffer1.Create(16);
arrayBuffer2 = new ArrayBufferObjectInterleaved(typeof(ComplexVertexElement), BufferObjectHint.StaticCpuDraw);
arrayBuffer2.Create(16);
arrayBuffer3 = new ArrayBufferObjectPacked(typeof(ComplexVertexElement), BufferObjectHint.StaticCpuDraw);
arrayBuffer3.Create(16);
using (VertexArrayObject vertexArray = new VertexArrayObject()) {
// Set array buffers to different attributes
Assert.DoesNotThrow(delegate() { vertexArray.SetArray(arrayBuffer1, "attribute1", null); });
VertexArrayBufferValues(vertexArray, "attribute1", null, arrayBuffer1, 0);
Assert.DoesNotThrow(delegate() { vertexArray.SetArray(arrayBuffer2, "attribute2", null); });
VertexArrayBufferValues(vertexArray, "attribute2", null, arrayBuffer2, 0);
Assert.DoesNotThrow(delegate() { vertexArray.SetArray(arrayBuffer2, "attribute3", null); });
VertexArrayBufferValues(vertexArray, "attribute3", null, arrayBuffer2, 0);
Assert.DoesNotThrow(delegate() { vertexArray.SetArray(arrayBuffer3, "attribute4", null); });
VertexArrayBufferValues(vertexArray, "attribute4", null, arrayBuffer3, 0);
}
Assert.IsTrue(arrayBuffer1.IsDisposed);
Assert.IsTrue(arrayBuffer2.IsDisposed);
Assert.IsTrue(arrayBuffer3.IsDisposed);
} finally {
if (arrayBuffer1 != null && !arrayBuffer1.IsDisposed)
{
arrayBuffer1.Dispose();
}
if (arrayBuffer2 != null && !arrayBuffer2.IsDisposed)
{
arrayBuffer2.Dispose();
}
if (arrayBuffer3 != null && !arrayBuffer3.IsDisposed)
{
arrayBuffer3.Dispose();
}
}
}
/// <summary>
/// Allocate an instance of the type.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for allocating the instance.
/// </param>
/// <returns>
/// It returns an instance of a specific type.
/// </returns>
public override object Allocate(GraphicsContext ctx)
{
VertexArrayBatchObject vertexArrayObject = new VertexArrayBatchObject();
ArrayBufferObject arrayBufferObject;
arrayBufferObject = new ArrayBufferObject(VertexBaseType.Float, 3, BufferObjectHint.StaticCpuDraw);
arrayBufferObject.Create(16);
vertexArrayObject.SetArray(arrayBufferObject, VertexArraySemantic.Position);
arrayBufferObject = new ArrayBufferObject(VertexBaseType.Float, 2, BufferObjectHint.StaticCpuDraw);
arrayBufferObject.Create(16);
vertexArrayObject.SetArray(arrayBufferObject, VertexArraySemantic.TexCoord);
vertexArrayObject.SetElementArray(PrimitiveType.Lines);
return(vertexArrayObject);
}
public void SetArraySectionByBlock()
{
ArrayBufferObjectBase arrayBuffer1 = null, arrayBuffer2 = null, arrayBuffer3 = null;
try {
arrayBuffer1 = new ArrayBufferObject(VertexBaseType.Float, 3, BufferObjectHint.StaticCpuDraw);
arrayBuffer1.Create(16);
arrayBuffer2 = new ArrayBufferObjectInterleaved(typeof(ComplexVertexElement), BufferObjectHint.StaticCpuDraw);
arrayBuffer2.Create(16);
arrayBuffer3 = new ArrayBufferObjectPacked(typeof(ComplexVertexElement), BufferObjectHint.StaticCpuDraw);
arrayBuffer3.Create(16);
using (VertexArrayObject vertexArray = new VertexArrayObject()) {
// Set array buffers to different attributes
Assert.DoesNotThrow(delegate () { vertexArray.SetArray(arrayBuffer1, 0, "attribute1", null); });
VertexArrayBufferValues(vertexArray, "attribute1", null, arrayBuffer1, 0);
Assert.DoesNotThrow(delegate () { vertexArray.SetArray(arrayBuffer2, 0, "attribute2", null); });
VertexArrayBufferValues(vertexArray, "attribute2", null, arrayBuffer2, 0);
Assert.DoesNotThrow(delegate () { vertexArray.SetArray(arrayBuffer2, 1, "attribute3", null); });
VertexArrayBufferValues(vertexArray, "attribute3", null, arrayBuffer2, 1);
Assert.DoesNotThrow(delegate () { vertexArray.SetArray(arrayBuffer3, 2, "attribute4", null); });
VertexArrayBufferValues(vertexArray, "attribute4", null, arrayBuffer3, 2);
}
Assert.IsTrue(arrayBuffer1.IsDisposed);
Assert.IsTrue(arrayBuffer2.IsDisposed);
Assert.IsTrue(arrayBuffer3.IsDisposed);
} finally {
if (arrayBuffer1 != null && !arrayBuffer1.IsDisposed)
arrayBuffer1.Dispose();
if (arrayBuffer2 != null && !arrayBuffer2.IsDisposed)
arrayBuffer2.Dispose();
if (arrayBuffer3 != null && !arrayBuffer3.IsDisposed)
arrayBuffer3.Dispose();
}
}
/// <summary>
/// Allocate an instance of the type mocked for spying.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for allocating the instance.
/// </param>
/// <returns>
/// It returns an instance of a specific type.
/// </returns>
public override T AllocateSpy <T>(GraphicsContext ctx)
{
T arrayBufferObjectSpy = (T)CreateTypeSpy(_InstanceType);
VertexArrayBatchObject vertexArrayObject = arrayBufferObjectSpy as VertexArrayBatchObject;
if (vertexArrayObject != null)
{
ArrayBufferObject arrayBufferObject;
arrayBufferObject = new ArrayBufferObject(VertexBaseType.Float, 3, BufferObjectHint.StaticCpuDraw);
arrayBufferObject.Create(16);
vertexArrayObject.SetArray(arrayBufferObject, VertexArraySemantic.Position);
arrayBufferObject = new ArrayBufferObject(VertexBaseType.Float, 2, BufferObjectHint.StaticCpuDraw);
arrayBufferObject.Create(16);
vertexArrayObject.SetArray(arrayBufferObject, VertexArraySemantic.TexCoord);
vertexArrayObject.SetElementArray(PrimitiveType.Lines);
}
return(arrayBufferObjectSpy);
}
/// <summary>
/// Automatically computes bounding box for the specified vertex arrays.
/// </summary>
/// <param name="vertexArrayObject">
///
/// </param>
/// <returns>
/// It returns the <see cref="IBoundingVolume"/> for <paramref name="vertexArrayObject"/>, if possible.
/// </returns>
private static IBoundingVolume ComputeBoundingVolume(VertexArrayObject vertexArrayObject)
{
if (vertexArrayObject == null)
{
throw new ArgumentNullException("vertexArrayObject");
}
VertexArrayObject.IVertexArray vertexArray = vertexArrayObject.GetVertexArray(VertexArraySemantic.Position);
if (vertexArray == null)
{
return(null);
}
ArrayBufferObjectBase positionArray = vertexArray.Array;
Type positionArrayType = positionArray.GetType();
if (positionArrayType == typeof(ArrayBufferObject <Vertex4f>))
{
ArrayBufferObject <Vertex4f> positionArray4f = (ArrayBufferObject <Vertex4f>)positionArray;
Vertex4f min = Vertex4f.Maximum, max = Vertex4f.Minimum;
positionArray4f.MinMax(out min, out max);
return(new BoundingBox((Vertex3f)min, (Vertex3f)max));
}
else if (positionArrayType == typeof(ArrayBufferObject <Vertex3f>))
{
ArrayBufferObject <Vertex3f> positionArray3f = (ArrayBufferObject <Vertex3f>)positionArray;
Vertex3f min = Vertex3f.Maximum, max = Vertex3f.Minimum;
positionArray3f.MinMax(out min, out max);
return(new BoundingBox(min, max));
}
else
{
return(null);
}
}
/// <summary>
/// Test <see cref="ArrayBufferObject.ToArray()"/>.
/// </summary>
/// <param name="vertexBaseType"></param>
/// <param name="vertexLength"></param>
/// <param name="array"></param>
public void TestToArrayCtx_Core(VertexBaseType vertexBaseType, uint vertexLength, Array array)
{
using (ArrayBufferObject arrayBuffer = new ArrayBufferObject(vertexBaseType, vertexLength, BufferObjectHint.StaticCpuDraw)) {
// Without creation, ToArray(GraphicsContext) will throw an exception
Assert.Throws <InvalidOperationException>(delegate() { arrayBuffer.ToArray(_Context); });
// Create client buffer
arrayBuffer.Create(array);
// ToArray() must be equal to array
CollectionAssert.AreEqual(array, arrayBuffer.ToArray());
// Without creation, ToArray(GraphicsContext) will throw an exception
Assert.Throws <InvalidOperationException>(delegate() { arrayBuffer.ToArray(_Context); });
// Create GPU buffer
arrayBuffer.Create(_Context);
// ToArray() must be equal to array
CollectionAssert.AreEqual(array, arrayBuffer.ToArray(_Context));
// Create a reversed array from test array
Array arrayReverse = Array.CreateInstance(array.GetType().GetElementType(), array.Length);
Array.Copy(array, arrayReverse, array.Length);
Array.Reverse(arrayReverse);
CollectionAssert.AreEquivalent(array, arrayReverse);
// Update client buffer
arrayBuffer.Create(arrayReverse);
// Client buffer is updated, but not the GPU buffer
CollectionAssert.AreEqual(arrayReverse, arrayBuffer.ToArray());
CollectionAssert.AreNotEqual(arrayReverse, arrayBuffer.ToArray(_Context));
// Update GPU buffer
arrayBuffer.Create(_Context);
CollectionAssert.AreEqual(arrayReverse, arrayBuffer.ToArray(_Context));
}
}
/// <summary>
/// Create a <see cref="VertexArrayObject"/> for rendering glyphs.
/// </summary>
private void LinkSharedResources(GraphicsContext ctx)
{
CheckCurrentContext(ctx);
string resourceClassId = "OpenGL.Objects.FontPatch";
string resourceBaseId = String.Format("{0}.{1}-{2}-{3}", resourceClassId, Family, Size, Style);
string vertexArrayId = resourceBaseId + ".VertexArray";
string glyphDbId = resourceBaseId + ".GlyphDb";
#region Vertex Arrays
_VertexArrays = (VertexArrayObject)ctx.GetSharedResource(vertexArrayId);
Dictionary <char, Glyph> glyphsDb = null;
if (_VertexArrays == null)
{
_VertexArrays = new VertexArrayObject();
List <GlyphPolygons> glyphPolygons = GenerateGlyphs(Family, Size, Style);
List <Vertex2f> glyphsVertices = new List <Vertex2f>();
GlyphPolygons gGlyph = null;
uint gVertexIndex = 0;
glyphsDb = new Dictionary <char, Glyph>();
using (Tessellator tessellator = new Tessellator()) {
tessellator.Begin += delegate(object sender, TessellatorBeginEventArgs e) {
gVertexIndex = (uint)glyphsVertices.Count;
};
tessellator.End += delegate(object sender, EventArgs e) {
// Create element (range)
int glyphIndex = _VertexArrays.SetElementArray(PrimitiveType.Triangles, gVertexIndex, (uint)glyphsVertices.Count - gVertexIndex);
glyphsDb.Add(gGlyph.GlyphChar, new Glyph(gGlyph.GlyphChar, gGlyph.GlyphSize, glyphIndex));
};
tessellator.Vertex += delegate(object sender, TessellatorVertexEventArgs e) {
glyphsVertices.Add((Vertex2f)e.Vertex);
};
// Tessellate all glyphs
foreach (GlyphPolygons glyph in glyphPolygons)
{
gGlyph = glyph;
if (glyph.Contours.Count == 0)
{
glyphsDb.Add(gGlyph.GlyphChar, new Glyph(gGlyph.GlyphChar, gGlyph.GlyphSize, -1));
continue;
}
tessellator.BeginPolygon();
foreach (List <Vertex2f> countour in glyph.Contours)
{
tessellator.AddContour(countour.ToArray(), Vertex3f.UnitZ);
}
tessellator.EndPolygon();
}
}
// Element vertices
ArrayBufferObject <Vertex2f> gVertexPosition = new ArrayBufferObject <Vertex2f>(BufferObjectHint.StaticCpuDraw);
gVertexPosition.Create(glyphsVertices.ToArray());
_VertexArrays.SetArray(gVertexPosition, VertexArraySemantic.Position);
// Share
ctx.SetSharedResource(vertexArrayId, _VertexArrays);
}
LinkResource(_VertexArrays);
#endregion
#region Glyph Metadata
_Glyphs = (Dictionary <char, Glyph>)ctx.GetSharedResource(glyphDbId);
if (glyphsDb != null)
{
_Glyphs = glyphsDb;
}
if (_Glyphs == null)
{
throw new InvalidProgramException("no glyph metadata");
}
// Share
ctx.SetSharedResource(glyphDbId, _Glyphs);
#endregion
}
private SceneObjectGeometry CreateCubeGeometry()
{
SceneObjectGeometry cubeGeometry = new SceneObjectGeometry("Cube");
#region State
cubeGeometry.ObjectState.DefineState(new DepthTestState(DepthFunction.Less));
cubeGeometry.ObjectState.DefineState(new CullFaceState(FrontFaceDirection.Ccw, CullFaceMode.Back));
cubeGeometry.ObjectState.DefineState(new TransformState());
MaterialState cubeMaterialState = new MaterialState();
cubeMaterialState.FrontMaterial = new MaterialState.Material(ColorRGBAF.ColorWhite * 0.5f);
cubeMaterialState.FrontMaterial.Ambient = ColorRGBAF.ColorBlack;
cubeMaterialState.FrontMaterial.Diffuse = ColorRGBAF.ColorWhite * 0.5f;
cubeMaterialState.FrontMaterial.Specular = ColorRGBAF.ColorWhite * 0.5f;
cubeMaterialState.FrontMaterial.Shininess = 10.0f;
cubeGeometry.ObjectState.DefineState(cubeMaterialState);
#endregion
#region Vertex Arrays
if (_CubeArrayPosition == null)
{
_CubeArrayPosition = new ArrayBufferObject <Vertex3f>(BufferObjectHint.StaticCpuDraw);
_CubeArrayPosition.Create(ArrayPosition);
}
if (_CubeArrayColor == null)
{
_CubeArrayColor = new ArrayBufferObject <ColorRGBF>(BufferObjectHint.StaticCpuDraw);
_CubeArrayColor.Create(ArrayColors);
}
if (_CubeArrayNormal == null)
{
_CubeArrayNormal = new ArrayBufferObject <Vertex3f>(BufferObjectHint.StaticCpuDraw);
_CubeArrayNormal.Create(ArrayNormals);
}
if (_CubeArrays == null)
{
_CubeArrays = new VertexArrayObject();
_CubeArrays.SetArray(_CubeArrayPosition, VertexArraySemantic.Position);
_CubeArrays.SetArray(_CubeArrayColor, VertexArraySemantic.Color);
_CubeArrays.SetArray(_CubeArrayNormal, VertexArraySemantic.Normal);
_CubeArrays.SetElementArray(PrimitiveType.Triangles);
}
cubeGeometry.VertexArray = _CubeArrays;
#endregion
#region Program
cubeGeometry.BoundingVolume = new BoundingBox(-Vertex3f.One * _CubeSize, Vertex3f.One * _CubeSize);
#endregion
return(cubeGeometry);
}
public void TestLineShaderRender()
{
using (ShaderProgram shaderProgram = ShadersLibrary.Instance.CreateProgram("OpenGL.Line")) {
Assert.DoesNotThrow(delegate () { shaderProgram.Create(_Context); });
using (VertexArrayObject vao = new VertexArrayObject()) {
List<Vertex2f> vertices = new List<Vertex2f>();
for (float y = 0.375f; y < _Framebuffer.Height; y += 2.0f) {
vertices.Add(new Vertex2f(0.0f, y));
vertices.Add(new Vertex2f(_Framebuffer.Width, y));
}
// Setup ABO (Position)
ArrayBufferObject abo = new ArrayBufferObject(VertexBaseType.Float, 2, BufferObjectHint.StaticCpuDraw);
abo.Create(vertices.ToArray());
// Setup VAO
vao.SetArray(abo, VertexArraySemantic.Position);
vao.SetElementArray(PrimitiveType.Lines);
vao.Create(_Context);
// Draw test
Image feedbackImageFixed = null, feedbackImageShader = null;
try {
Gl.Viewport(0, 0, (int)_Framebuffer.Width, (int)_Framebuffer.Height);
#region Fixed pipeline
_Framebuffer.SetClearColor(new ColorRGBAF(0.0f, 0.0f, 0.0f));
_Framebuffer.Clear(_Context);
Gl.MatrixMode(MatrixMode.Projection);
Gl.LoadMatrix(new OrthoProjectionMatrix(0.0f, _Framebuffer.Width, 0.0f, _Framebuffer.Height).ToArray());
Gl.MatrixMode(MatrixMode.Modelview);
Gl.LoadIdentity();
Gl.Color3(1.0f, 1.0f, 1.0f);
Gl.LineWidth(1.0f);
vao.Draw(_Context);
feedbackImageFixed = _Framebuffer.ReadColorBuffer(_Context, 0, 0, 0, _Framebuffer.Width, _Framebuffer.Height, PixelLayout.GRAY8);
ImageCodec.Instance.Save(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "LineProgram.Fixed.png"),
feedbackImageFixed, ImageFormat.Png, null
);
#endregion
#region Shader pipeline
_Framebuffer.SetClearColor(new ColorRGBAF(0.0f, 0.0f, 0.0f));
_Framebuffer.Clear(_Context);
shaderProgram.Bind(_Context);
shaderProgram.SetUniform(_Context, "hal_ModelViewProjection", RenderProjectionMatrix);
shaderProgram.SetUniform(_Context, "hal_UniformColor", new ColorRGBA(1.0f, 1.0f, 1.0f));
shaderProgram.SetUniform(_Context, "hal_LineWidth", 1.0f);
shaderProgram.SetUniform(_Context, "hal_ViewportSize", new Vertex2f(_Framebuffer.Width, _Framebuffer.Height));
vao.Draw(_Context, shaderProgram);
feedbackImageShader = _Framebuffer.ReadColorBuffer(_Context, 0, 0, 0, _Framebuffer.Width, _Framebuffer.Height, PixelLayout.GRAY8);
ImageCodec.Instance.Save(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "LineProgram.Shader.png"),
feedbackImageShader, ImageFormat.Png, null
);
#endregion
// Compare results
} finally {
if (feedbackImageFixed != null)
feedbackImageFixed.Dispose();
if (feedbackImageShader != null)
feedbackImageShader.Dispose();
}
}
//// Get rendering feedback
//using (Image feedbackImage = _Framebuffer.ReadColorBuffer(_Context, 0, 0, 0, _Framebuffer.Width, _Framebuffer.Height, PixelLayout.GRAY8)) {
// // Drawn only even lines
// for (uint y = 0; y < _Framebuffer.Height; y++) {
// for (uint x = 0; x < _Framebuffer.Width; x++) {
// ColorGRAY8 fragment = (ColorGRAY8)feedbackImage[x, y];
// Assert.AreEqual((y % 2) == 0 ? 255 : 0, fragment.Level, String.Format("Color mismatch at {0}x{1}", x, y));
// }
// }
//}
}
}
public VertexArrayObject CreateArrays(ObjContext objContext)
{
if (objContext == null)
{
throw new ArgumentNullException("objContext");
}
VertexArrayObject vertexArray = new VertexArrayObject();
List <ObjFaceCoord> coords = new List <ObjFaceCoord>();
bool hasTexCoord = Material.DiffuseTexture != null;
bool hasNormals = true;
bool hasTanCoord = hasTexCoord && Material.NormalTexture != null;
foreach (ObjFace f in Faces)
{
hasTexCoord |= f.HasTexCoord;
hasNormals |= f.HasNormal;
coords.AddRange(f.Triangulate());
}
uint vertexCount = (uint)coords.Count;
Vertex4f[] position = new Vertex4f[vertexCount];
Vertex3f[] normal = hasNormals ? new Vertex3f[vertexCount] : null;
Vertex2f[] texcoord = new Vertex2f[vertexCount];
for (int i = 0; i < position.Length; i++)
{
Debug.Assert(coords[i].VertexIndex < objContext.Vertices.Count);
position[i] = objContext.Vertices[coords[i].VertexIndex];
if (hasTexCoord)
{
Debug.Assert(coords[i].TexCoordIndex < objContext.TextureCoords.Count);
texcoord[i] = objContext.TextureCoords[coords[i].TexCoordIndex];
}
if (hasNormals)
{
Debug.Assert(coords[i].NormalIndex < objContext.Normals.Count);
normal[i] = objContext.Normals[coords[i].NormalIndex];
}
}
// Position (mandatory)
ArrayBufferObject <Vertex4f> positionBuffer = new ArrayBufferObject <Vertex4f>(BufferObjectHint.StaticCpuDraw);
positionBuffer.Create(position);
vertexArray.SetArray(positionBuffer, VertexArraySemantic.Position);
// Layout (triangles)
vertexArray.SetElementArray(PrimitiveType.Triangles);
// Texture
if (hasTexCoord)
{
ArrayBufferObject <Vertex2f> texCoordBuffer = new ArrayBufferObject <Vertex2f>(BufferObjectHint.StaticCpuDraw);
texCoordBuffer.Create(texcoord);
vertexArray.SetArray(texCoordBuffer, VertexArraySemantic.TexCoord);
}
// Normals
if (hasNormals)
{
ArrayBufferObject <Vertex3f> normalBuffer = new ArrayBufferObject <Vertex3f>(BufferObjectHint.StaticCpuDraw);
normalBuffer.Create(normal);
vertexArray.SetArray(normalBuffer, VertexArraySemantic.Normal);
}
else
{
ArrayBufferObject <Vertex3f> normalBuffer = new ArrayBufferObject <Vertex3f>(BufferObjectHint.StaticCpuDraw);
normalBuffer.Create(vertexCount);
vertexArray.SetArray(normalBuffer, VertexArraySemantic.Normal);
vertexArray.GenerateNormals();
}
// Tangents
if (hasTanCoord)
{
ArrayBufferObject <Vertex3f> tanCoordBuffer = new ArrayBufferObject <Vertex3f>(BufferObjectHint.StaticCpuDraw);
tanCoordBuffer.Create(vertexCount);
vertexArray.SetArray(tanCoordBuffer, VertexArraySemantic.Tangent);
ArrayBufferObject <Vertex3f> bitanCoordBuffer = new ArrayBufferObject <Vertex3f>(BufferObjectHint.StaticCpuDraw);
bitanCoordBuffer.Create(vertexCount);
vertexArray.SetArray(bitanCoordBuffer, VertexArraySemantic.Bitangent);
vertexArray.GenerateTangents();
}
return(vertexArray);
}
public void SetArrayByBlock_Exception2()
{
using (VertexArrayObject vertexArray = new VertexArrayObject()) {
using (ArrayBufferObject arrayBuffer = new ArrayBufferObject(VertexBaseType.Float, 3, BufferObjectHint.StaticCpuDraw)) {
// arrayBuffer is empty
Assert.Throws(Is.InstanceOf(typeof(ArgumentException)), delegate () { vertexArray.SetArray(arrayBuffer, "attributeName", null); });
}
}
}
/// <summary>
/// Create a <see cref="VertexArrayObject"/> for rendering glyphs.
/// </summary>
/// <param name="fontFamily"></param>
/// <param name="emSize"></param>
/// <param name="glyphs"></param>
/// <returns></returns>
private static VertexArrayObject CreateVertexArray(GraphicsContext ctx, FontFamily fontFamily, uint emSize, FontStyle fontStyle, out Dictionary <char, Glyph> glyphs)
{
CheckCurrentContext(ctx);
string resourceBaseId = String.Format("OpenGL.Objects.FontPatch.{0}-{1}-{2}", fontFamily, emSize, fontStyle);
string vertexArrayId = resourceBaseId + ".VertexArray";
string glyphDbId = resourceBaseId + ".GlyphDb";
VertexArrayObject vertexArrays = (VertexArrayObject)ctx.GetSharedResource(vertexArrayId);
Dictionary <char, Glyph> glyphsDb = (Dictionary <char, Glyph>)ctx.GetSharedResource(glyphDbId);
if (vertexArrays != null && glyphsDb != null)
{
glyphs = glyphsDb;
return(vertexArrays);
}
vertexArrays = new VertexArrayObject();
glyphsDb = new Dictionary <char, Glyph>();
List <GlyphPolygons> glyphPolygons = GenerateGlyphs(fontFamily, emSize, fontStyle);
List <Vertex2f> glyphsVertices = new List <Vertex2f>();
GlyphPolygons gGlyph = null;
uint gVertexIndex = 0;
glyphs = new Dictionary <char, Glyph>();
using (Tessellator tessellator = new Tessellator()) {
tessellator.Begin += delegate(object sender, TessellatorBeginEventArgs e) {
gVertexIndex = (uint)glyphsVertices.Count;
};
tessellator.End += delegate(object sender, EventArgs e) {
// Create element (range)
int glyphIndex = vertexArrays.SetElementArray(PrimitiveType.Triangles, gVertexIndex, (uint)glyphsVertices.Count - gVertexIndex);
glyphsDb.Add(gGlyph.GlyphChar, new Glyph(gGlyph.GlyphChar, gGlyph.GlyphSize, glyphIndex));
};
tessellator.Vertex += delegate(object sender, TessellatorVertexEventArgs e) {
glyphsVertices.Add((Vertex2f)e.Vertex);
};
// Tessellate all glyphs
foreach (GlyphPolygons glyph in glyphPolygons)
{
gGlyph = glyph;
if (glyph.Contours.Count == 0)
{
glyphsDb.Add(gGlyph.GlyphChar, new Glyph(gGlyph.GlyphChar, gGlyph.GlyphSize, -1));
continue;
}
tessellator.BeginPolygon();
foreach (List <Vertex2f> countour in glyph.Contours)
{
tessellator.AddContour(countour.ToArray(), Vertex3f.UnitZ);
}
tessellator.EndPolygon();
}
}
// Element vertices
ArrayBufferObject <Vertex2f> gVertexPosition = new ArrayBufferObject <Vertex2f>(BufferObjectHint.StaticCpuDraw);
gVertexPosition.Create(glyphsVertices.ToArray());
vertexArrays.SetArray(gVertexPosition, VertexArraySemantic.Position);
// Returns glyphs database
glyphs = glyphsDb;
// Share resources
ctx.SetSharedResource(vertexArrayId, vertexArrays);
ctx.SetSharedResource(glyphDbId, glyphsDb);
return(vertexArrays);
}
/// <summary>
///
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="dx"></param>
/// <param name="dy"></param>
/// <returns></returns>
public static VertexArrayObject CreatePlane(float x, float y, float z, uint dx, uint dy)
{
VertexArrayObject vertexArray = new VertexArrayObject();
// Vertex generation
Vertex3f[] position = new Vertex3f[(dx + 1) * (dy + 1)];
float x2 = x / 2.0f, y2 = y / 2.0f;
float vdx = x / dx, vdy = y / dy;
int vidx = 0;
for (float vy = -y2; vy <= y2; vy += vdy)
{
for (float vx = -x2; vx <= x2; vx += vdx)
{
Debug.Assert(vidx < position.Length);
position[vidx++] = new Vertex3f(vx, vy, z);
}
}
// Elements generation
List <uint> indices = new List <uint>();
uint vstride = dx + 1;
for (uint i = 0; i < dy; i++)
{
uint yoffset = i * vstride;
// Triangle strip start
indices.Add(yoffset + vstride);
for (uint ix = 0; ix < dx; ix++)
{
uint xoffset = yoffset + ix;
indices.Add(xoffset);
indices.Add(xoffset + vstride + 1);
}
indices.Add(yoffset + vstride - 1);
if (Gl.CurrentExtensions.PrimitiveRestart == false)
{
throw new NotImplementedException();
}
else
{
indices.Add(uint.MaxValue);
}
}
// Buffer definition
ArrayBufferObject <Vertex3f> positionBuffer = new ArrayBufferObject <Vertex3f>(BufferObjectHint.StaticCpuDraw);
positionBuffer.Create(position);
vertexArray.SetArray(positionBuffer, VertexArraySemantic.Position);
ElementBufferObject <uint> elementBuffer = new ElementBufferObject <uint>(BufferObjectHint.StaticCpuDraw);
elementBuffer.Create(indices.ToArray());
elementBuffer.RestartIndexEnabled = Gl.CurrentExtensions.PrimitiveRestart;
vertexArray.SetElementArray(PrimitiveType.TriangleStrip, elementBuffer);
return(vertexArray);
}
/// <summary>
/// Create a <see cref="VertexArrayObject"/> for rendering glyphs.
/// </summary>
/// <param name="fontFamily"></param>
/// <param name="emSize"></param>
/// <param name="glyphs"></param>
/// <returns></returns>
private void LinkSharedResources(GraphicsContext ctx)
{
CheckCurrentContext(ctx);
// Font-wide resources
string resourceClassId = "OpenGL.Objects.FontTextureArray2d";
string instanceArrayId = resourceClassId + ".InstanceArray";
string vertexArrayId = resourceClassId + ".VertexArray";
_GlyphInstances = (ArrayBufferObjectInterleaved <GlyphInstance>)ctx.GetSharedResource(instanceArrayId);
_VertexArrays = (VertexArrayObject)ctx.GetSharedResource(vertexArrayId);
if (_GlyphInstances == null)
{
_GlyphInstances = new ArrayBufferObjectInterleaved <GlyphInstance>(BufferObjectHint.DynamicCpuDraw);
_GlyphInstances.Create(256);
// Share
ctx.SetSharedResource(instanceArrayId, _GlyphInstances);
}
LinkResource(_GlyphInstances);
if (_VertexArrays == null)
{
_VertexArrays = new VertexArrayObject();
ArrayBufferObject <Vertex2f> arrayPosition = new ArrayBufferObject <Vertex2f>(BufferObjectHint.StaticCpuDraw);
arrayPosition.Create(new Vertex2f[] {
new Vertex2f(0.0f, 1.0f),
new Vertex2f(0.0f, 0.0f),
new Vertex2f(1.0f, 1.0f),
new Vertex2f(1.0f, 0.0f),
});
_VertexArrays.SetArray(arrayPosition, VertexArraySemantic.Position);
_VertexArrays.SetInstancedArray(_GlyphInstances, 0, 1, "glo_GlyphModelViewProjection");
_VertexArrays.SetInstancedArray(_GlyphInstances, 1, 1, "glo_GlyphVertexParams");
_VertexArrays.SetInstancedArray(_GlyphInstances, 2, 1, "glo_GlyphTexParams");
_VertexArrays.SetElementArray(PrimitiveType.TriangleStrip);
// Share
ctx.SetSharedResource(vertexArrayId, _VertexArrays);
}
LinkResource(_VertexArrays);
// Font resources
string resourceBaseId = String.Format("{0}.{1}-{2}-{3}", resourceClassId, Family, Size, Style);
string glyphDbId = resourceBaseId + ".GlyphDb";
string textureId = resourceBaseId + ".Texture";
_GlyphDb = (Dictionary <char, Glyph>)ctx.GetSharedResource(glyphDbId);
_FontTexture = (TextureArray2d)ctx.GetSharedResource(textureId);
StringFormat stringFormat = StringFormat.GenericTypographic;
if (_GlyphDb == null)
{
_GlyphDb = new Dictionary <char, Glyph>();
char[] fontChars = GetFontCharacters().ToCharArray();
uint layer = 0;
using (Bitmap bitmap = new Bitmap(1, 1))
using (Graphics g = Graphics.FromImage(bitmap))
using (System.Drawing.Font font = new System.Drawing.Font(Family, Size, Style))
{
// Avoid grid fitting
g.TextRenderingHint = TextRenderingHint.AntiAlias;
float glyphHeight = font.GetHeight();
foreach (char c in fontChars)
{
SizeF glyphSize;
switch (c)
{
case ' ':
glyphSize = g.MeasureString(c.ToString(), font, 0, StringFormat.GenericDefault);
break;
default:
glyphSize = g.MeasureString(c.ToString(), font, 0, stringFormat);
break;
}
Glyph glyph = new Glyph(c, glyphSize, layer++, new SizeF(1.0f, 1.0f));
_GlyphDb.Add(c, glyph);
}
}
// Share
ctx.SetSharedResource(glyphDbId, _GlyphDb);
}
if (_FontTexture == null)
{
// Get the size required for all glyphs
float w = 0.0f, h = 0.0f;
uint z = 0;
foreach (Glyph glyph in _GlyphDb.Values)
{
w = Math.Max(w, glyph.GlyphSize.Width);
h = Math.Max(h, glyph.GlyphSize.Height);
z = Math.Max(z, glyph.Layer);
}
// Create texture
_FontTexture = new TextureArray2d((uint)Math.Ceiling(w), (uint)Math.Ceiling(h), z + 1, PixelLayout.R8);
_FontTexture.Create(ctx);
using (System.Drawing.Font font = new System.Drawing.Font(Family, Size, Style))
using (Brush brush = new SolidBrush(Color.White))
{
foreach (Glyph glyph in _GlyphDb.Values)
{
using (Bitmap bitmap = new Bitmap((int)_FontTexture.Width, (int)_FontTexture.Height, System.Drawing.Imaging.PixelFormat.Format24bppRgb))
using (Graphics g = Graphics.FromImage(bitmap)) {
// Recompute texture scaling
glyph.TexScale = new SizeF(
glyph.GlyphSize.Width / bitmap.Width,
glyph.GlyphSize.Height / bitmap.Height
);
// Avoid grid fitting
g.TextRenderingHint = TextRenderingHint.AntiAlias;
g.Clear(Color.Black);
g.DrawString(glyph.GlyphChar.ToString(), font, brush, 0.0f, 0.0f, stringFormat);
_FontTexture.Create(ctx, PixelLayout.R8, bitmap, glyph.Layer);
}
}
}
// Share
ctx.SetSharedResource(textureId, _FontTexture);
}
LinkResource(_FontTexture);
}
public void Draw()
{
Vertex2f[] vertices = new Vertex2f[] {
new Vertex2f(0.0f, 0.0f),
new Vertex2f(1.0f, 0.0f),
new Vertex2f(1.0f, 1.0f),
new Vertex2f(0.0f, 1.0f),
};
using (VertexArrayObject vao = new VertexArrayObject()) {
// Setup ABO (Position)
ArrayBufferObject abo = new ArrayBufferObject(VertexBaseType.Float, 2, BufferObjectHint.StaticCpuDraw);
abo.Create(vertices);
// Setup VAO
vao.SetArray(abo, VertexArraySemantic.Position);
vao.SetElementArray(PrimitiveType.TriangleStrip);
vao.Create(_Context);
using (State.GraphicsStateSet currentState = State.GraphicsStateSet.GetDefaultSet()) {
// Set transform state
State.TransformStateBase stateTransform = (State.TransformStateBase)currentState[State.TransformStateBase.StateId];
// Set normalized orthogonal projection
stateTransform.LocalProjection = new OrthoProjectionMatrix(0.0f, 1.0f, 0.0f, 1.0f);
// Apply state
currentState.Apply(_Context);
// Draw
Assert.DoesNotThrow(delegate () { vao.Draw(_Context); });
}
}
}
public void SetArraySectionBySemantic_Exception2()
{
using (VertexArrayObject vertexArray = new VertexArrayObject()) {
using (ArrayBufferObject arrayBuffer = new ArrayBufferObject(VertexBaseType.Float, 3, BufferObjectHint.StaticCpuDraw)) {
// arrayBuffer is empty
Assert.Throws(Is.InstanceOf(typeof(ArgumentException)), delegate () { vertexArray.SetArray(arrayBuffer, 1, VertexArraySemantic.Position); });
}
}
}
public void TestLineShaderRender()
{
using (ShaderProgram shaderProgram = ShadersLibrary.Instance.CreateProgram("OpenGL.Line")) {
Assert.DoesNotThrow(delegate() { shaderProgram.Create(_Context); });
using (VertexArrayObject vao = new VertexArrayObject()) {
List <Vertex2f> vertices = new List <Vertex2f>();
for (float y = 0.375f; y < _Framebuffer.Height; y += 2.0f)
{
vertices.Add(new Vertex2f(0.0f, y));
vertices.Add(new Vertex2f(_Framebuffer.Width, y));
}
// Setup ABO (Position)
ArrayBufferObject abo = new ArrayBufferObject(VertexBaseType.Float, 2, BufferObjectHint.StaticCpuDraw);
abo.Create(vertices.ToArray());
// Setup VAO
vao.SetArray(abo, VertexArraySemantic.Position);
vao.SetElementArray(PrimitiveType.Lines);
vao.Create(_Context);
// Draw test
Image feedbackImageFixed = null, feedbackImageShader = null;
try {
Gl.Viewport(0, 0, (int)_Framebuffer.Width, (int)_Framebuffer.Height);
#region Fixed pipeline
_Framebuffer.SetClearColor(new ColorRGBAF(0.0f, 0.0f, 0.0f));
_Framebuffer.Clear(_Context);
Gl.MatrixMode(MatrixMode.Projection);
Gl.LoadMatrix(new OrthoProjectionMatrix(0.0f, _Framebuffer.Width, 0.0f, _Framebuffer.Height).ToArray());
Gl.MatrixMode(MatrixMode.Modelview);
Gl.LoadIdentity();
Gl.Color3(1.0f, 1.0f, 1.0f);
Gl.LineWidth(1.0f);
vao.Draw(_Context);
feedbackImageFixed = _Framebuffer.ReadColorBuffer(_Context, 0, 0, 0, _Framebuffer.Width, _Framebuffer.Height, PixelLayout.R8);
ImageCodec.Instance.Save(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "LineProgram.Fixed.png"),
feedbackImageFixed, ImageFormat.Png, null
);
#endregion
#region Shader pipeline
_Framebuffer.SetClearColor(new ColorRGBAF(0.0f, 0.0f, 0.0f));
_Framebuffer.Clear(_Context);
_Context.Bind(shaderProgram);
shaderProgram.SetUniform(_Context, "hal_ModelViewProjection", RenderProjectionMatrix);
shaderProgram.SetUniform(_Context, "hal_UniformColor", new ColorRGBA(1.0f, 1.0f, 1.0f));
shaderProgram.SetUniform(_Context, "hal_LineWidth", 1.0f);
shaderProgram.SetUniform(_Context, "hal_ViewportSize", new Vertex2f(_Framebuffer.Width, _Framebuffer.Height));
vao.Draw(_Context, shaderProgram);
feedbackImageShader = _Framebuffer.ReadColorBuffer(_Context, 0, 0, 0, _Framebuffer.Width, _Framebuffer.Height, PixelLayout.R8);
ImageCodec.Instance.Save(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "LineProgram.Shader.png"),
feedbackImageShader, ImageFormat.Png, null
);
#endregion
// Compare results
} finally {
if (feedbackImageFixed != null)
{
feedbackImageFixed.Dispose();
}
if (feedbackImageShader != null)
{
feedbackImageShader.Dispose();
}
}
}
//// Get rendering feedback
//using (Image feedbackImage = _Framebuffer.ReadColorBuffer(_Context, 0, 0, 0, _Framebuffer.Width, _Framebuffer.Height, PixelLayout.GRAY8)) {
// // Drawn only even lines
// for (uint y = 0; y < _Framebuffer.Height; y++) {
// for (uint x = 0; x < _Framebuffer.Width; x++) {
// ColorGRAY8 fragment = (ColorGRAY8)feedbackImage[x, y];
// Assert.AreEqual((y % 2) == 0 ? 255 : 0, fragment.Level, String.Format("Color mismatch at {0}x{1}", x, y));
// }
// }
//}
}
}
public void SetArraySectionByBlock_Exception3()
{
using (VertexArrayObject vertexArray = new VertexArrayObject()) {
using (ArrayBufferObject arrayBuffer = new ArrayBufferObject(VertexBaseType.Float, 3, BufferObjectHint.StaticCpuDraw)) {
// Create the array buffer
arrayBuffer.Create(16);
// sectionIndex is out of range
Assert.Throws(Is.InstanceOf(typeof(ArgumentOutOfRangeException)), delegate () { vertexArray.SetArray(arrayBuffer, 1, "attributeName", null); });
}
}
}
