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r6939 | pogokeen | 2018-07-14 14:36:44 -0700 (Sat, 14 Jul 2018) | 3 lines

Support software renderer upscaling engine-side in sdlayer and sdlayer12 with various scaling factors (beyond just pixel doubling).
When glsurface is available, use GL to upscale the render buffer.
Additionally, fix build issues with sdlayer12 introduced by GLAD changes (r6656).
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r6938 | pogokeen | 2018-07-14 14:36:34 -0700 (Sat, 14 Jul 2018) | 1 line

sdlayer.cpp: Don't destroy window resouces if switching between software rendering on glsurface and Polymost/Polymer
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