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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-10-12 22:02:10 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-11-07 19:27:33 +0200
commit9e10811bb5ec1cdace2041714f3235e94446738c (patch)
treed0ad7399bb5b07707d96491dce8a0ce149634923 /utils/ipu3
parent3badc5c4bea38cd362707ec3da25881f30113fac (diff)
qcam: viewfinder_gl: Add support for RGB formats
Add support for 24-bit and 32-bit RGB formats. The fragment samples the texture and reorders the components, using a pattern set through the RGB_PATTERN macro. The pattern stores the shader vec4 element indices (named {r, g, b, a} by convention, for elements 0 to 3) to be extracted from the texture samples, when interpreted by OpenGL as RGBA. Note that, as textures are created with GL_UNSIGNED_BYTE, the RGBA order corresponds to bytes in memory, while the libcamera formats are named based on the components order in a 32-bit word stored in memory in little endian format. An alternative to manual reordering in the shader would be to set the texture swizzling mask. This is however not available in OpenGL ES before version 3.0, which we don't mandate at the moment. Only the BGR888 and RGB888 formats have been tested, with the vimc pipeline handler. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Andrey Konovalov <andrey.konovalov@linaro.org> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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