dc9854cc5b
Adds a class that represents an image rectangle in OpenGL coordinate convention. android.graphics.Rect puts (0, 0) as the top-left corner: it enforces `Rect.top <= Rect.bottom` and this matches `android.graphics.Bitmap` coordinates: docs https://developer.android.com/reference/android/graphics/Rect This is different from OpenGL coordinates where (0, 0) is at the bottom-left corner. I.e. GlRect.bottom <= GlRect.top: docs https://registry.khronos.org/OpenGL-Refpages/es3.0/html/glReadPixels.xhtml The reason for this change is to allow a public API GlRect getScaledRegion() which selects a region of pixels of a GL texture to be copied to CPU memory. PiperOrigin-RevId: 669231826