Photoshop CS4 + OpenGL (Screencast)

Photoshop CS4 uses a graphics card processor, instead of the main processor, to increase the rendering speed. To access the Photoshop graphics processor, it is necessary that the video card supports OpenGL and has enough RAM (128MB minimum) and drivers that support OpenGL 2.0 and Shader Model 3.0.

If your video card meets all requirements, then OpenGL drawing is turned on in Photoshop.
Check here:

Windows: Edit → Preferences → Performance
Mac OS: Photoshop → Preferences → Performance

If this feature is disabled, then most likely your card is not supported.
A list of supported video cards can be viewed on the Adobe website .

The list of functions working with OpenGL in Photoshop CS4:

• Smooth mapping at any zoom level
• Animated scaling
• Animated transitions when scaling with one click
• Hand pushing image
• Bird's eye view
• Rotate canvas
• Smooth display of images with non-square pixels
• Grid for pixels
• Color matching is now processed using a graphics processor.
• Brush Preview
• Various functions for processing 3D images.

operating system	GPU support and limitations
Mac OS PPC	Photoshop supports OpenGL features, including smooth display at all zoom levels, a bird's eye view, canvas rotation, a preview of the brush, and hand pushing of the image on PowerPC machines if the computer has an installed video card that is on the list of supported ones. More advanced features are not supported on PowerPC machines, even if you have the right video card.
Mac OS Intel	Supported.
Windows XP 32	Supported.
Windows XP 64	Not supported because drivers for XP 64 do not support this technology.
Windows Vista 32	Supported, but by default rendering using OpenGL is disabled.
Windows Vista 64	Supported.

The screencast that I recorded to show some of the new, or improved, old features in Photoshop CS4 in which OpenGL is involved.

^{Since on Habré you cannot set the size of the video yourself (or I didn’t understand how), I advise you to click on the link , or zoom in on the whole screen (although the quality leaves much to be desired).}
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PS: This is my first screencast and first post on Habré.