Test the WebGL premultipledAlpha context creation flag.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


testing: premultipliedAlpha: true imageFormat: image/png
PASS gl.getContextAttributes().premultipledAlpha is premultipledAlpha
PASS gl.getContextAttributes().preserveDrawingBuffer is true
PASS getError was expected value: NO_ERROR : Should be no errors from setup.
PASS getError was expected value: NO_ERROR : Should be no errors from drawing.
PASS getError was expected value: NO_ERROR : Should be no errors from creating copy.
PASS getError was expected value: NO_ERROR : Should be no errors from 2nd drawing.
PASS should draw with 64,128,255,128

testing: premultipliedAlpha: true imageFormat: undefined
PASS gl.getContextAttributes().premultipledAlpha is premultipledAlpha
PASS gl.getContextAttributes().preserveDrawingBuffer is true
PASS getError was expected value: NO_ERROR : Should be no errors from setup.
PASS getError was expected value: NO_ERROR : Should be no errors from drawing.
PASS getError was expected value: NO_ERROR : Should be no errors from creating copy.
PASS getError was expected value: NO_ERROR : Should be no errors from 2nd drawing.
PASS should draw with 64,128,255,128

testing: premultipliedAlpha: false imageFormat: image/png
PASS gl.getContextAttributes().premultipledAlpha is premultipledAlpha
PASS gl.getContextAttributes().preserveDrawingBuffer is true
PASS getError was expected value: NO_ERROR : Should be no errors from setup.
PASS getError was expected value: NO_ERROR : Should be no errors from drawing.
PASS getError was expected value: NO_ERROR : Should be no errors from creating copy.
PASS getError was expected value: NO_ERROR : Should be no errors from 2nd drawing.
PASS should draw with 255,192,128,1

testing: premultipliedAlpha: false imageFormat: undefined
PASS gl.getContextAttributes().premultipledAlpha is premultipledAlpha
PASS gl.getContextAttributes().preserveDrawingBuffer is true
PASS getError was expected value: NO_ERROR : Should be no errors from setup.
PASS getError was expected value: NO_ERROR : Should be no errors from drawing.
PASS getError was expected value: NO_ERROR : Should be no errors from creating copy.
PASS getError was expected value: NO_ERROR : Should be no errors from 2nd drawing.
PASS should draw with 255,192,128,1

testing: premultipliedAlpha: false imageFormat: image/jpeg
PASS gl.getContextAttributes().premultipledAlpha is premultipledAlpha
PASS gl.getContextAttributes().preserveDrawingBuffer is true
PASS getError was expected value: NO_ERROR : Should be no errors from setup.
PASS getError was expected value: NO_ERROR : Should be no errors from drawing.
PASS getError was expected value: NO_ERROR : Should be no errors from creating copy.
PASS getError was expected value: NO_ERROR : Should be no errors from 2nd drawing.
PASS should draw with 128,128,128,255

testing: premultipliedAlpha: true imageFormat: image/jpeg
PASS gl.getContextAttributes().premultipledAlpha is premultipledAlpha
PASS gl.getContextAttributes().preserveDrawingBuffer is true
PASS getError was expected value: NO_ERROR : Should be no errors from setup.
PASS getError was expected value: NO_ERROR : Should be no errors from drawing.
PASS getError was expected value: NO_ERROR : Should be no errors from creating copy.
PASS getError was expected value: NO_ERROR : Should be no errors from 2nd drawing.
PASS should draw with 128,128,128,255
PASS successfullyParsed is true

TEST COMPLETE