override protected void ActivateWithPass(int pass, Texture texture, Matrix mvpMatrix)
{
UpdateParamaters(pass, (int)texture.NativeWidth, (int)texture.NativeHeight);
bool isColorPass = _enableColorUniform && pass == NumPasses - 1;
BlurProgram program = isColorPass ? _tintedProgram : _program;
GL.UseProgram(program.Name);
Matrix4 mvp = mvpMatrix.ConvertToMatrix4();
GL.UniformMatrix4(program.UMvpMatrix, false, ref mvp);
GL.Uniform4(program.UOffsets, 1, _offsets);
GL.Uniform4(program.UWeights, 1, _weights);
if (isColorPass)
{
GL.Uniform4(program.UColor, 1, _color);
}
}
/// <summary>
/// Activates the optimal shader program for the current settings; alpha and matrix uniforms are
/// passed to the program right away, and the texture (if available) is bound.
/// Parameters:
/// mvpMatrix: The modelview-projection matrix used for rendering. Any vertex will be multiplied with this matrix.
/// premultipliedAlpha: Indicates if the color values of texture and vertices use premultiplied alpha.
/// alpha: The alpha value with which every vertex color will be multiplied.
/// useTinting: Set to true if you dont use textures or want to use alpha.
/// texture: The texture that's projected onto the quad, or 'null' if there is none.
/// </summary>
public void PrepareToDraw(Matrix mvpMatrix, bool premultipliedAlpha, float alpha, bool useTinting, Texture texture = null)
{
bool hasTexture = texture != null;
string programName;
if (hasTexture)
{
programName = useTinting ? "SparrowAlphaTextureProgram" : "SparrowTextureProgram";
}
else
{
programName = "SparrowQuadProgram";
}
if (_currentProgram == null || _currentProgram != SparrowSharpApp.GetProgram(programName))
{
if (SparrowSharpApp.Programs.ContainsKey(programName))
{
_currentProgram = SparrowSharpApp.GetProgram(programName);
}
else
{
string vertexShader = VertexShaderString(hasTexture, useTinting);
string fragmentShader = FragmentShaderString(hasTexture, useTinting);
_currentProgram = new Program(vertexShader, fragmentShader);
SparrowSharpApp.RegisterProgram(programName, _currentProgram);
}
_aPosition = _currentProgram.Attributes["aPosition"];
if (_currentProgram.Attributes.ContainsKey("aColor"))
{
_aColor = _currentProgram.Attributes["aColor"];
}
if (_currentProgram.Attributes.ContainsKey("aTexCoords"))
{
_aTexCoords = _currentProgram.Attributes["aTexCoords"];
}
_uMvpMatrix = _currentProgram.Uniforms["uMvpMatrix"];
if (_currentProgram.Uniforms.ContainsKey("uAlpha"))
{
_uAlpha = _currentProgram.Uniforms["uAlpha"];
}
}
Matrix4 glkMvpMatrix = mvpMatrix.ConvertToMatrix4();
GL.UseProgram(_currentProgram.Name);
GL.UniformMatrix4(_uMvpMatrix, false, ref glkMvpMatrix); // TODO check; was glUniformMatrix4fv(_uMvpMatrix, 1, NO, glkMvpMatrix.m);
if (useTinting)
{
if (premultipliedAlpha)
{
GL.Uniform4(_uAlpha, alpha, alpha, alpha, alpha);
}
else
{
GL.Uniform4(_uAlpha, 1.0f, 1.0f, 1.0f, alpha);
}
}
if (hasTexture)
{
GL.ActiveTexture (TextureUnit.Texture0);
GL.BindTexture (TextureTarget.Texture2D, texture.Name);
}
}
override protected void ActivateWithPass(int pass, Texture texture, Matrix mvpMatrix)
{
GL.UseProgram(_program.Name);
Matrix4 mvp = mvpMatrix.ConvertToMatrix4();
GL.UniformMatrix4(_program.Uniforms["uMvpMatrix"], false, ref mvp);
}
