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cogl/gl: Use CPU packing/unpacking for opaque fp16 formats

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There is no internal fp16 format which has no alpha which means we would
get garbage alpha when reading the framebuffer directly. We have to use
the packing/unpacking to always get the alpha of 1.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3441>
This commit is contained in:
Sebastian Wick 2023-12-04 17:44:48 +01:00
parent 9c219db9fe
commit 64f4415f28
1 changed files with 9 additions and 2 deletions
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11
cogl/cogl/driver/gl/gl/cogl-driver-gl.c
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@ -280,10 +280,8 @@ _cogl_driver_pixel_format_to_gl (CoglContext *context,
glformat = GL_BGRA;
gltype = GL_HALF_FLOAT;
break;
case COGL_PIXEL_FORMAT_XRGB_FP_16161616:
case COGL_PIXEL_FORMAT_ARGB_FP_16161616:
case COGL_PIXEL_FORMAT_ARGB_FP_16161616_PRE:
case COGL_PIXEL_FORMAT_XBGR_FP_16161616:
case COGL_PIXEL_FORMAT_ABGR_FP_16161616:
case COGL_PIXEL_FORMAT_ABGR_FP_16161616_PRE:
required_format =
@ -294,6 +292,15 @@ _cogl_driver_pixel_format_to_gl (CoglContext *context,
&glformat,
&gltype);
break;
case COGL_PIXEL_FORMAT_XRGB_FP_16161616:
case COGL_PIXEL_FORMAT_XBGR_FP_16161616:
required_format =
_cogl_driver_pixel_format_to_gl (context,
COGL_PIXEL_FORMAT_RGBX_FP_16161616,
&glintformat,
&glformat,
&gltype);
break;
case COGL_PIXEL_FORMAT_DEPTH_16:
glintformat = GL_DEPTH_COMPONENT16;