Method initTex2DShader

core/src/processing/opengl/PGL.java:1329–1361

()

  protected PGL initTex2DShader() {
    PGL ppgl = primaryPGL ? this : graphics.getPrimaryPGL();

    if (!ppgl.loadedTex2DShader || ppgl.tex2DShaderContext != ppgl.glContext) {
      String[] preprocVertSrc = preprocessVertexSource(texVertShaderSource, getGLSLVersion(), getGLSLVersionSuffix());
      String vertSource = PApplet.join(preprocVertSrc, "\n");
      String[] preprocFragSrc = preprocessFragmentSource(tex2DFragShaderSource, getGLSLVersion(), getGLSLVersionSuffix());
      String fragSource = PApplet.join(preprocFragSrc, "\n");
      ppgl.tex2DVertShader = createShader(VERTEX_SHADER, vertSource);
      ppgl.tex2DFragShader = createShader(FRAGMENT_SHADER, fragSource);
      if (0 < ppgl.tex2DVertShader && 0 < ppgl.tex2DFragShader) {
        ppgl.tex2DShaderProgram = createProgram(ppgl.tex2DVertShader, ppgl.tex2DFragShader);
      }
      if (0 < ppgl.tex2DShaderProgram) {
        ppgl.tex2DVertLoc = getAttribLocation(ppgl.tex2DShaderProgram, "position");
        ppgl.tex2DTCoordLoc = getAttribLocation(ppgl.tex2DShaderProgram, "texCoord");
        ppgl.tex2DSamplerLoc = getUniformLocation(ppgl.tex2DShaderProgram, "texMap");
      }
      ppgl.loadedTex2DShader = true;
      ppgl.tex2DShaderContext = ppgl.glContext;

      genBuffers(1, intBuffer);
      ppgl.tex2DGeoVBO = intBuffer.get(0);
      bindBuffer(ARRAY_BUFFER, ppgl.tex2DGeoVBO);
      bufferData(ARRAY_BUFFER, 16 * SIZEOF_FLOAT, null, STATIC_DRAW);
    }

    if (texData == null) {
      texData = allocateDirectFloatBuffer(texCoords.length);
    }

    return ppgl;
  }


  protected void drawTexture2D(int id, int texW, int texH,