method renderTextureQuad

Source

@override
void renderTextureQuad(
    RenderState renderState,
    RenderTextureQuad renderTextureQuad) {

  if (renderTextureQuad.hasCustomVertices) {
    var renderTexture = renderTextureQuad.renderTexture;
    var ixList = renderTextureQuad.ixList;
    var vxList = renderTextureQuad.vxList;
    this.renderTextureMesh(renderState, renderTexture, ixList, vxList);
    return;
  }

  var context = _renderingContext;
  var source = renderTextureQuad.renderTexture.source;
  var rotation = renderTextureQuad.rotation;
  var sourceRect = renderTextureQuad.sourceRectangle;
  var vxList = renderTextureQuad.vxListQuad;
  var matrix = renderState.globalMatrix;
  var alpha = renderState.globalAlpha;
  var blendMode = renderState.globalBlendMode;

  if (_activeAlpha != alpha) {
    _activeAlpha = alpha;
    context.globalAlpha = alpha;
  }

  if (_activeBlendMode != blendMode) {
    _activeBlendMode = blendMode;
    context.globalCompositeOperation = blendMode.compositeOperation;
  }

  if (rotation == 0) {
    context.setTransform(matrix.a, matrix.b, matrix.c, matrix.d, matrix.tx, matrix.ty);
    context.drawImageScaledFromSource(source,
        sourceRect.left, sourceRect.top, sourceRect.width, sourceRect.height,
        vxList[0], vxList[1], vxList[8] - vxList[0], vxList[9] - vxList[1]);
  } else if (rotation == 1) {
    context.setTransform(-matrix.c, -matrix.d, matrix.a, matrix.b, matrix.tx, matrix.ty);
    context.drawImageScaledFromSource(source,
        sourceRect.left, sourceRect.top, sourceRect.width, sourceRect.height,
        0.0 - vxList[13], vxList[12], vxList[9] - vxList[1], vxList[8] - vxList[0]);
  } else if (rotation == 2) {
    context.setTransform(-matrix.a, -matrix.b, -matrix.c, -matrix.d, matrix.tx, matrix.ty);
    context.drawImageScaledFromSource(source,
        sourceRect.left, sourceRect.top, sourceRect.width, sourceRect.height,
        0.0 - vxList[8], 0.0 - vxList[9], vxList[8] - vxList[0], vxList[9] - vxList[1]);
  } else if (rotation == 3) {
    context.setTransform(matrix.c, matrix.d, -matrix.a, -matrix.b, matrix.tx, matrix.ty);
    context.drawImageScaledFromSource(source,
        sourceRect.left, sourceRect.top, sourceRect.width, sourceRect.height,
        vxList[5], 0.0 - vxList[4], vxList[9] - vxList[1], vxList[8] - vxList[0]);
  }
}