public static void glfons__renderDraw(object userPtr, float[] verts, float[] tcoords,
uint[] colors, int nverts)
{
GLFONScontext gl = (GLFONScontext)userPtr;
if (gl.tex == 0)
{
return;
}
GL.BindTexture(TextureTarget.Texture2D, gl.tex);
GL.Enable(EnableCap.Texture2D);
GL.EnableClientState(ArrayCap.VertexArray);
GL.EnableClientState(ArrayCap.TextureCoordArray);
GL.EnableClientState(ArrayCap.ColorArray);
//GL.VertexPointer(2, VertexPointerType.Float, sizeof(float)*2, verts);
//GL.TexCoordPointer(2, TexCoordPointerType.Float, sizeof(float)*2, tcoords);
//GL.ColorPointer(4, ColorPointerType.UnsignedByte, sizeof(uint), colors);
GL.VertexPointer(2, VertexPointerType.Float, 0, verts);
GL.TexCoordPointer(2, TexCoordPointerType.Float, 0, tcoords);
GL.ColorPointer(4, ColorPointerType.UnsignedByte, 0, colors);
GL.DrawArrays(BeginMode.Triangles, 0, nverts);
GL.Disable(EnableCap.Texture2D);
GL.DisableClientState(ArrayCap.VertexArray);
GL.DisableClientState(ArrayCap.TextureCoordArray);
GL.DisableClientState(ArrayCap.ColorArray);
}
public static void glfons__renderDelete(object userPtr)
{
GLFONScontext gl = (GLFONScontext)userPtr;
if (gl.tex != 0)
{
GL.DeleteTextures(1, ref gl.tex);
}
gl.tex = 0;
//free(gl);
}
public static FONScontext glfonsCreate(int width, int height, FONSflags flags)
{
FONSparams fparams;
GLFONScontext gl = new GLFONScontext();
fparams.width = width;
fparams.height = height;
fparams.flags = flags;
fparams.renderCreate = glfons__renderCreate;
fparams.renderResize = glfons__renderResize;
fparams.renderUpdate = glfons__renderUpdate;
fparams.renderDraw = glfons__renderDraw;
fparams.renderDelete = glfons__renderDelete;
fparams.userPtr = gl;
return(FontStash.fonsCreateInternal(ref fparams));
}
public static void glfons__renderUpdate(object uptr, ref int[] rect, byte[] data)
{
GLFONScontext gl = (GLFONScontext)uptr;
int w = rect[2] - rect[0];
int h = rect[3] - rect[1];
if (gl.tex == 0)
{
return;
}
GL.PushClientAttrib(ClientAttribMask.ClientPixelStoreBit);
GL.BindTexture(TextureTarget.Texture2D, gl.tex);
GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
GL.PixelStore(PixelStoreParameter.UnpackRowLength, gl.width);
GL.PixelStore(PixelStoreParameter.UnpackSkipPixels, rect[0]);
GL.PixelStore(PixelStoreParameter.UnpackSkipRows, rect[1]);
GL.TexSubImage2D(TextureTarget.Texture2D, 0, rect[0], rect[1], w, h,
PixelFormat.Alpha, PixelType.UnsignedByte, data);
GL.PopClientAttrib();
}
public static int glfons__renderCreate(object userPtr, int width, int height)
{
GLFONScontext gl = userPtr as GLFONScontext;
// Create may be called multiple times, delete existing texture.
if (gl.tex != 0)
{
GL.DeleteTextures(1, ref gl.tex);
gl.tex = 0;
}
GL.GenTextures(1, out gl.tex);
if (!(gl.tex != 0))
{
return(0);
}
gl.width = width;
gl.height = height;
GL.BindTexture(TextureTarget.Texture2D, gl.tex);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Alpha,
gl.width, gl.height, 0, PixelFormat.Alpha, PixelType.UnsignedByte, IntPtr.Zero);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter,
(int)TextureMinFilter.Linear);
return(1);
}
