e673. Getting Amount of Free Accelerated Image Memory
阿新 • • 發佈:2018-09-03
volatile rap fas ima usually link before reat end on some systems. The method returns 0 even if accelerated image memory is available. A workaround is to create a temporary volatile image on the graphics device before calling the method. Once the volatile image is created, the method appears to return the correct value on all subsequent calls.
Enabling Full-Screen Mode and e674 創建並繪制加速圖像.
Images in accelerated memory are much faster to draw on the screen. However, accelerated memory is typically limited and it is usually necessary for an application to manage the images residing in this space. This example demonstrates how to determine the amount free accelerated available.
Note: There appears to be a problem with GraphicsDevice.getAvailableAcceleratedMemory()
See also e601
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); try { GraphicsDevice[] gs = ge.getScreenDevices(); // Get current amount of available memory in bytes for each screen for (int i=0; i<gs.length; i++) { // Workaround; see description VolatileImage im = gs[i].getDefaultConfiguration().createCompatibleVolatileImage(1, 1); // Retrieve available free accelerated image memory int bytes = gs[i].getAvailableAcceleratedMemory(); if (bytes < 0) { // Amount of memory is unlimited } // Release the temporary volatile image im.flush(); } } catch (HeadlessException e) { // Is thrown if there are no screen devices }
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e673. Getting Amount of Free Accelerated Image Memory