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![]() Only one instance of a Context3D running in Constrained profile is allowed within a Flash Player instance.The Context3D back buffer must always be within the bounds of the stage.This affects sln/sge/seq/sne and needs to be replaced with compound mov/cmp instructions which are available with ps_2_0 (this will be done under the hood at the cost of using more instruction slots compared to ps_2_x). Limited to a smaller amount of constants/varying/temps per shader.Only 4 texture read indirections per shader.Limited to 64 ALU and 32 texture instructions per shader. ![]() Cards such as the GMA 900/950 only support pixel/vertex shader version 2.0 which forces the following limits on Stage3D when in Constrained profile: The trade-off for targeting lower end hardware with Constrained profile is that the Stage3D capabilities will be limited in order to guarantee that content runs well with that hardware. Constrained profile enables content authors to create Stage3D content targeting older systems using graphics cards such as Intel® GMA 900/950 on Windows®. This parameter is supplied to the Stage3D.requestContext3D() function and you can give it one of two value Context3DProfile.BASELINE ('baseline') which will return the typical Context3D that has existed in previous releases, or Context3DProfile.BASELINE_CONSTRAINED ('baselineConstrained') which will return a new kind of Context3D capable of running with hardware acceleration on previously unsupported GPU's.
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