protected bool BuildProgram(string vs, string fs)
{
//NOTE: during development,
//new shader source may not recompile if you don't clear cache or disable cache feature
//like...
//EnableProgramBinaryCache = false;
//---------------------
if (!LoadCompiledShader())
{
if (!_shaderProgram.Build(vs, fs))
{
return(false);
}
SaveCompiledShader();
}
//-----------------------
a_position = _shaderProgram.GetAttrV3f("a_position");
a_texCoord = _shaderProgram.GetAttrV2f("a_texCoord");
u_matrix = _shaderProgram.GetUniformMat4("u_mvpMatrix");
u_orthov_offset = _shaderProgram.GetUniform2("u_ortho_offset");
s_texture = _shaderProgram.GetUniform1("s_texture");
OnProgramBuilt();
return(true);
}
//--------------------------------
bool LoadShaders()
{
//--------------------------------------
//create shader program
shaderProgram = new MiniShaderProgram();
//--------------------------------------
string vs = @"
attribute vec3 a_position;
attribute vec4 a_color;
uniform mat4 u_mvpMatrix;
uniform vec4 u_solidColor;
uniform int u_useSolidColor;
varying vec4 v_color;
varying vec4 a_position_output;
void main()
{
a_position_output = u_mvpMatrix* vec4(a_position[0],a_position[1],0,1);
gl_Position = a_position_output;
v_color= vec4(1,0,0,1);
}
";
//fragment source
// string fs = @"void main()
// {
// gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);
// }
// ";
string fs = @"
precision mediump float;
varying vec4 v_color;
varying vec4 a_position_output;
void main()
{
if(a_position_output[1]>0.5){
gl_FragColor = vec4(0,1,1,1);
}else{
gl_FragColor= vec4(0,1,0,1);
}
}
";
if (!shaderProgram.Build(vs, fs))
{
throw new NotSupportedException();
}
a_position = shaderProgram.GetAttrV3f("a_position");
a_color = shaderProgram.GetAttrV4f("a_color");
u_matrix = shaderProgram.GetUniformMat4("u_mvpMatrix");
u_useSolidColor = shaderProgram.GetUniform1("u_useSolidColor");
u_solidColor = shaderProgram.GetUniform4("u_solidColor");
return(true);
}
protected bool BuildProgram(string vs, string fs)
{
//---------------------
if (!shaderProgram.Build(vs, fs))
{
return(false);
}
//-----------------------
a_position = shaderProgram.GetAttrV3f("a_position");
a_texCoord = shaderProgram.GetAttrV2f("a_texCoord");
u_matrix = shaderProgram.GetUniformMat4("u_mvpMatrix");
s_texture = shaderProgram.GetUniform1("s_texture");
OnProgramBuilt();
return(true);
}
protected override void OnReadyForInitGLShaderProgram()
{
//----------------
//vertex shader source
string vs = @"
precision mediump float;
attribute vec2 a_position;
attribute vec3 a_color;
attribute vec2 a_texcoord;
uniform mat4 u_mvpMatrix;
uniform vec4 u_solidColor;
uniform int u_useSolidColor;
varying vec4 v_color;
varying vec2 v_texcoord;
void main()
{
gl_Position = u_mvpMatrix* vec4(a_position[0],a_position[1],0.0,1.0);
if(u_useSolidColor !=0)
{
v_color= u_solidColor;
}
else
{
v_color = vec4(a_color,1.0);
}
v_texcoord= a_texcoord;
}
";
//fragment source
string fs = @"
precision mediump float;
varying vec4 v_color;
varying vec2 v_texcoord;
void main()
{
//gl_FragColor = vec4(1,v_texcoord.y,0,1);
gl_FragColor= v_color;
}
";
if (!shaderProgram.Build(vs, fs))
{
throw new NotSupportedException();
}
a_position = shaderProgram.GetAttrV2f("a_position");
a_color = shaderProgram.GetAttrV3f("a_color");
a_textureCoord = shaderProgram.GetAttrV2f("a_texcoord");
u_matrix = shaderProgram.GetUniformMat4("u_mvpMatrix");
u_useSolidColor = shaderProgram.GetUniform1("u_useSolidColor");
u_solidColor = shaderProgram.GetUniform4("u_solidColor");
//--------------------------------------------------------------------------------
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);
//square viewport
GL.Viewport(0, 0, max, max);
orthoView = MyMat4.ortho(0, max, 0, max, 0, 1);
//--------------------------------------------------------------------------------
//load image
}
