int LoadTexture(string imgFileName)
{
//Bitmap bmp = new Bitmap(imgFileName);
PixelFarm.Agg.ActualImage bmp = DemoHelper.LoadImage(imgFileName);
int texture;
GL.GenTextures(1, out texture);
GL.BindTexture(TextureTarget.Texture2D, texture);
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.LinearMipmapLinear);
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
//glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
//glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, static_cast<GLsizei>(image.width), static_cast<GLsizei>(image.height), 0,
// GL_RGBA, GL_UNSIGNED_BYTE, image.data.data());
//var bmpdata = bmp.LockBits(new System.Drawing.Rectangle(0, 0,
// bmp.Width, bmp.Height),
// System.Drawing.Imaging.ImageLockMode.ReadOnly,
// System.Drawing.Imaging.PixelFormat.Format32bppArgb);
var lazyImgProvider = new PixelFarm.DrawingGL.LazyAggBitmapBufferProvider(bmp);
IntPtr ptr = lazyImgProvider.GetRawBufferHead();
//var bmpdata = bmp.LockBits();
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, bmp.Width, bmp.Height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, ptr);
// bmp.UnlockBits(bmpdata);
lazyImgProvider.ReleaseBufferHead();
//glGenerateMipmap(GL_TEXTURE_2D);
GL.GenerateMipmap(TextureTarget.Texture2D);
return(texture);
}
public override void Init()
{
UseBitmapExt = false;
string imgFileName = "d:\\WImageTest\\lion1.png";
if (System.IO.File.Exists(imgFileName))
{
lionImg = DemoHelper.LoadImage(imgFileName);
}
}
protected override void OnReadyForInitGLShaderProgram()
{
//---------------------
var atlasBuilder = new Typography.Rendering.SimpleFontAtlasBuilder();
fontAtlas = atlasBuilder.LoadFontInfo(RootDemoPath.Path + @"\a_total.xml");
var actualImg = DemoHelper.LoadImage(RootDemoPath.Path + @"\a_total.png");
//var bmpdata = totalImg.LockBits(new System.Drawing.Rectangle(0, 0, totalImg.Width, totalImg.Height), System.Drawing.Imaging.ImageLockMode.ReadWrite, totalImg.PixelFormat);
//var buffer = new int[totalImg.Width * totalImg.Height];
//System.Runtime.InteropServices.Marshal.Copy(bmpdata.Scan0, buffer, 0, buffer.Length);
//totalImg.UnlockBits(bmpdata);
var glyph = new Typography.Rendering.GlyphImage(totalImg.Width, totalImg.Height);
glyph.SetImageBuffer(PixelFarm.Agg.ActualImage.CopyImgBuffer(actualImg), false);
fontAtlas.TotalGlyph = glyph;
}
protected override void OnReadyForInitGLShaderProgram()
{
//--------------------------------------------------------------------------
string vs = @"
attribute vec4 a_position;
attribute vec2 a_texCoord;
uniform mat4 u_mvpMatrix;
varying vec2 v_texCoord;
void main()
{
gl_Position = u_mvpMatrix* a_position;
v_texCoord = a_texCoord;
}
";
//in fs, angle on windows
//we need to switch color component
//because we store value in memory as BGRA
//and gl expect input in RGBA
string fs = @"
precision mediump float;
varying vec2 v_texCoord;
uniform sampler2D s_texture;
void main()
{
vec4 c = texture2D(s_texture, v_texCoord);
gl_FragColor = vec4(c[2],c[1],c[0],c[3]);
}
";
mProgram = ES2Utils.CompileProgram(vs, fs);
if (mProgram == 0)
{
//return false
}
// Get the attribute locations
mPositionLoc = GL.GetAttribLocation(mProgram, "a_position");
mTexCoordLoc = GL.GetAttribLocation(mProgram, "a_texCoord");
u_matrix = GL.GetUniformLocation(mProgram, "u_mvpMatrix");
// Get the sampler location
mSamplerLoc = GL.GetUniformLocation(mProgram, "s_texture");
//// Load the texture
PixelFarm.Agg.ActualImage bmp = DemoHelper.LoadImage(RootDemoPath.Path + @"\test001.png");
int bmpW = bmp.Width;
int bmpH = bmp.Height;
mTexture = LoadTexture(bmp);
GL.ClearColor(0, 0, 0, 0);
//================================================================================
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GL.ClearColor(1, 1, 1, 1);
//setup viewport size
int max = Math.Max(this.Width, this.Height);
orthoViewMat = MyMat4.ortho(0, max, 0, max, 0, 1).data;
//square viewport
GL.Viewport(0, 0, max, max);
imgVertices = new float[]
{
0, bmpH, 0,
0, 0,
//---------------------
0, 0, 0,
0, 1,
//---------------------
bmpW, bmpH, 0,
1, 0,
//---------------------
bmpW, 0, 0,
1, 1
};
}