i965/screen: Add basic support for rendering 10 bpc/depth 30 framebuffers. (v3)

Expose formats which are supported at least back to Gen 5 Ironlake,
possibly further. Allow creation of 10 bpc winsys buffers for drawables.

glxinfo now lists new RGBA 10 10 10 2/0 formats.

v2: Move the BGRA/BGRX1010102 formats before the RGBA/RGBX8888
    32 bit formats, as the code comments require. Thanks Emil!
    Update num_formats from 3 to 5, to keep the special Android
    handling intact.

v3: Use num_formats = ARRAY_SIZE(formats) - 2 as suggested by Tapani,
    to only exclude the last 2 Android formats, add Tapani's r-b.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>

diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index 7c2690a92fdadfd5ba445a22a7efef1396782037..746c568de279d8ee4e76b368a29330f5c5df739e 100644 (file)
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -1602,7 +1602,13 @@ intelCreateBuffer(__DRIscreen *dri_screen,
       fb->Visual.samples = num_samples;
    }
 
-   if (mesaVis->redBits == 5) {
+   if (mesaVis->redBits == 10 && mesaVis->alphaBits > 0) {
+      rgbFormat = mesaVis->redMask == 0x3ff00000 ? MESA_FORMAT_B10G10R10A2_UNORM
+                                                 : MESA_FORMAT_R10G10B10A2_UNORM;
+   } else if (mesaVis->redBits == 10) {
+      rgbFormat = mesaVis->redMask == 0x3ff00000 ? MESA_FORMAT_B10G10R10X2_UNORM
+                                                 : MESA_FORMAT_R10G10B10X2_UNORM;
+   } else if (mesaVis->redBits == 5) {
       rgbFormat = mesaVis->redMask == 0x1f ? MESA_FORMAT_R5G6B5_UNORM
                                            : MESA_FORMAT_B5G6R5_UNORM;
    } else if (mesaVis->sRGBCapable) {
@@ -2012,6 +2018,10 @@ intel_screen_make_configs(__DRIscreen *dri_screen)
 
       MESA_FORMAT_B8G8R8A8_SRGB,
 
+      /* For 10 bpc, 30 bit depth framebuffers. */
+      MESA_FORMAT_B10G10R10A2_UNORM,
+      MESA_FORMAT_B10G10R10X2_UNORM,
+
       /* The 32-bit RGBA format must not precede the 32-bit BGRA format.
        * Likewise for RGBX and BGRX.  Otherwise, the GLX client and the GLX
        * server may disagree on which format the GLXFBConfig represents,