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我試圖將亮度紋理複製到亮度紋理。更具體地說,我試圖用另一個紋理在內存中擴展單通道紋理。將亮度/ alpha紋理複製到GLES中的紋理
我現在的步驟:
create FBO with Luminance format, new width and height.
bind FBO.
render the textures concatenated.
unbind FBO
create Luminance texture the size of FBO
bind FBO with Luminance texture
render FBO's previous texture
unbind FBO
然而GLES 2.0文檔狀態,即FBO的不能渲染到紋理的亮度。我如何處理單字節紋理呢?無論如何,我是否可以複製GPU上的亮度紋理?