private unsafe void UpdateTexCoordBuffer(string text)
{
GlyphServer server = this.glyphServer;
float textureWidth = server.TextureWidth;
float textureHeight = server.TextureHeight;
//float maxHeight = server.MaxHeight;
//float maxDiff = server.MaxDiff;
Dictionary <char, GlyphInfo> dict = server.CharGlyphDict;
//float cursorX = 0, cursorY = 0;
var glyphTexCoord = (GlyphTexCoord *)this.texCoordBuffer.MapBuffer(MapBufferAccess.ReadWrite);
int index = 0;
for (int i = 0; i < this.Capacity && i < text.Length; i++)
{
char c = text[i];
GlyphInfo glyphInfo;
if (dict.TryGetValue(c, out glyphInfo))
{
float left = (glyphInfo.x) / textureWidth;
float right = (glyphInfo.x + glyphInfo.width) / textureWidth;
float bottom = (glyphInfo.y) / textureHeight;
float top = (glyphInfo.y + glyphInfo.height) / textureHeight;
glyphTexCoord[index] = new GlyphTexCoord(
new vec2(left, top),
new vec2(left, bottom),
new vec2(right, bottom),
new vec2(right, top)
);
index++;
}
}
this.texCoordBuffer.UnmapBuffer();
}
public void RenderBeforeChildren(RenderEventArgs arg)
{
if (!this.IsInitialized)
{
this.Initialize();
}
var method = this.RenderUnit.Methods[0]; // the only render unit in this node.
ShaderProgram program = method.Program;
SingleLineModel lineModel = this.singleLineModel;
GlyphServer glyphServer = lineModel.GetGlyphServer();
Texture texture = glyphServer.GlyphsTexture;
if (texture != null)
{
program.SetUniform("glyphTexture", texture);
}
var viewport = new int[4];
GL.Instance.GetIntegerv((uint)GetTarget.Viewport, viewport);
ICamera camera = arg.Camera;
mat4 projection = camera.GetProjectionMatrix();
mat4 view = camera.GetViewMatrix();
mat4 model = this.GetModelMatrix();
program.SetUniform("mvpMat", projection * view * model);
program.SetUniform("screenSize", new ivec2(viewport[2], viewport[3]));
program.SetUniform("lineSize", new vec2(lineModel.LineWidth, lineModel.LineHeight));
program.SetUniform("textColor", this.textColor);
program.SetUniform("backgroundColor", Color.SkyBlue.ToVec4());
program.SetUniform("fontSize", this.fontSize);
method.Render();
}
private unsafe void UpdatePositionBuffer(string text)
{
GlyphServer server = this.glyphServer;
float maxHeight = server.MaxHeight;
float maxDiff = server.MaxDiff;
Dictionary <char, GlyphInfo> dict = server.CharGlyphDict;
float cursorX = 0, cursorY = 0;
var glyphPositions = (GlyphPosition *)this.positionBuffer.MapBuffer(MapBufferAccess.ReadWrite);
for (int i = 0; i < this.Capacity && i < text.Length; i++)
{
char c = text[i];
GlyphInfo glyphInfo;
if (dict.TryGetValue(c, out glyphInfo))
{
float left = cursorX + glyphInfo.xOffset;
float right = left + glyphInfo.width;
float bottom = cursorY + maxHeight - glyphInfo.yOffset - maxDiff;
float top = bottom + glyphInfo.height;
glyphPositions[i] = new GlyphPosition(
new vec2(left, top),
new vec2(left, bottom),
new vec2(right, bottom),
new vec2(right, top)
);
cursorX += glyphInfo.xAdvance;
}
}
// move glyphs to center in model space.
//float halfWidth = cursorX / 2, halfHeight = maxHeight / 2;
//for (int i = 0; i < text.Length; i++)
//{
// GlyphPosition position = glyphPositions[i];
// float left = position.leftBottom.x;
// float right = position.rightBottom.x;
// float bottom = position.leftBottom.y;
// float top = position.leftTop.y;
// left -= halfWidth; right -= halfWidth;
// bottom -= halfHeight; top -= halfHeight;
// left /= cursorX; right /= cursorX;
// bottom /= maxHeight; top /= maxHeight;
// glyphPositions[index] = new GlyphPosition(
// new vec2(left, top),
// new vec2(left, bottom),
// new vec2(right, bottom),
// new vec2(right, top)
// );
//}
this.positionBuffer.UnmapBuffer();
this.lineWidth = cursorX;
this.lineHeight = maxHeight;
}
public static SingleLineNode Create(int capacity, GlyphServer glyphServer)
{
var vs = new VertexShader(vertexCode);
var fs = new FragmentShader(fragmentCode);
var provider = new ShaderArray(vs, fs);
var map = new AttributeMap();
map.Add("inPosition", SingleLineModel.strPosition);
map.Add("inTexCoord", SingleLineModel.strTexCoord);
var builder = new RenderMethodBuilder(provider, map, new BlendSwitch());
var node = new SingleLineNode(new SingleLineModel(capacity, glyphServer), builder);
node.Initialize();
return(node);
}
//private SceneNodeBase GetRootElement()
//{
// var rectangle = DistanceFieldNode.Create();
// rectangle.Scale *= 3;
// string folder = System.Windows.Forms.Application.StartupPath;
// rectangle.TextureSource = new TextureSource(System.IO.Path.Combine(folder, @"texture2D.png"));
// var group = new GroupNode(rectangle);//, blend, blend2);
// var axis = AxisNode.Create();
// group.Children.Add(axis);
// return group;
//}
private SceneNodeBase GetRootElement()
{
var group = new GroupNode();
{
string dictFilename = "VeraMoBI.ttf_sdf.txt";
string glyphsFilename = "VeraMoBI.ttf_sdf.png";
GlyphServer server = GlyphServer.Load(dictFilename, glyphsFilename);
var node = SingleLineNode.Create(100, server);
node.TextColor = Color.Red;
node.Text = "The quick brown fox jumps over a lazy dog!";
group.Children.Add(node);
this.singleLineNode = node;
}
{
var axis = AxisNode.Create();
group.Children.Add(axis);
}
return(group);
}
public static GlyphServer Load(string dictFilename, string glyphsFilename)
{
Dictionary <char, GlyphInfo> dict = SDFDictParser.Parse(dictFilename);
float maxHeight, maxDiff;
GetHeight(dict, out maxHeight, out maxDiff);
Texture texture = LoadTexture(glyphsFilename);
int textureWidth, textureHeight;
GetTextureSize(glyphsFilename, out textureWidth, out textureHeight);
var result = new GlyphServer();
result.charGlyphDict = dict;
result.maxHeight = maxHeight;
result.maxDiff = maxDiff;
result.glyphsTexture = texture;
result.textureWidth = textureWidth;
result.textureHeight = textureHeight;
return(result);
}
/// <summary>
///
/// </summary>
/// <param name="capacity"></param>
/// <param name="glyphServer"></param>
public SingleLineModel(int capacity, GlyphServer glyphServer)
{
this.Capacity = capacity;
this.glyphServer = glyphServer;
}