Method setTexture

core/src/processing/opengl/PShader.java:1324–1368

(Texture tex)

  }

  protected void setTexture(Texture tex) {
    texture = tex;

    float scaleu = 1;
    float scalev = 1;
    float dispu  = 0;
    float dispv  = 0;

    if (tex != null) {
      if (tex.invertedX()) {
        scaleu = -1;
        dispu  = 1;
      }

      if (tex.invertedY()) {
        scalev = -1;
        dispv  = 1;
      }

      scaleu *= tex.maxTexcoordU();
      dispu  *= tex.maxTexcoordU();
      scalev *= tex.maxTexcoordV();
      dispv  *= tex.maxTexcoordV();

      setUniformValue(texOffsetLoc, 1.0f / tex.width, 1.0f / tex.height);

      if (-1 < textureLoc) {
        texUnit =  -1 < ppixelsUnit ? ppixelsUnit + 1 : getLastTexUnit() + 1;
        setUniformValue(textureLoc, texUnit);
        pgl.activeTexture(PGL.TEXTURE0 + texUnit);
        tex.bind();
      }
    }

    if (-1 < texMatrixLoc) {
      if (tcmat == null) {
        tcmat = new float[16];
      }
      tcmat[0] = scaleu; tcmat[4] = 0;      tcmat[ 8] = 0; tcmat[12] = dispu;
      tcmat[1] = 0;      tcmat[5] = scalev; tcmat[ 9] = 0; tcmat[13] = dispv;
      tcmat[2] = 0;      tcmat[6] = 0;      tcmat[10] = 0; tcmat[14] = 0;
      tcmat[3] = 0;      tcmat[7] = 0;      tcmat[11] = 0; tcmat[15] = 0;
      setUniformMatrix(texMatrixLoc, tcmat);
    }
  }


  protected boolean supportsTexturing() {