[Mesa-dev] [PATCH 2/2] i965: Add support for 16-bit unorm L, A, and I textures.

[Eric Anholt]

While not required by any particular spec version, mplayer was asking
for L16 and hoping for actual L16 without checking.  The 8 bits
allocated led to 10-bit planar video data stored in the lower 10 bits
giving only 2 bits of precision in video.  While it was an amusing
effect, give them what they actually wanted instead.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=41461
---
 src/mesa/drivers/dri/i965/brw_wm_surface_state.c |    3 +++
 src/mesa/drivers/dri/intel/intel_context.c       |    6 +++++-
 2 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index 04dc389..66a8a5a 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -80,6 +80,9 @@ brw_format_for_mesa_format(gl_format mesa_format)
       [MESA_FORMAT_I8] = BRW_SURFACEFORMAT_I8_UNORM,
       [MESA_FORMAT_A8] = BRW_SURFACEFORMAT_A8_UNORM,
       [MESA_FORMAT_AL88] = BRW_SURFACEFORMAT_L8A8_UNORM,
+      [MESA_FORMAT_L16] = BRW_SURFACEFORMAT_L16_UNORM,
+      [MESA_FORMAT_A16] = BRW_SURFACEFORMAT_A16_UNORM,
+      [MESA_FORMAT_I16] = BRW_SURFACEFORMAT_I16_UNORM,
       [MESA_FORMAT_AL1616] = BRW_SURFACEFORMAT_L16A16_UNORM,
       [MESA_FORMAT_R8] = BRW_SURFACEFORMAT_R8_UNORM,
       [MESA_FORMAT_R16] = BRW_SURFACEFORMAT_R16_UNORM,
diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c
index 8e8ab73..3e10ce0 100644
--- a/src/mesa/drivers/dri/intel/intel_context.c
+++ b/src/mesa/drivers/dri/intel/intel_context.c
@@ -640,8 +640,12 @@ intelInitContext(struct intel_context *intel,
    ctx->TextureFormatSupported[MESA_FORMAT_A8] = true;
    ctx->TextureFormatSupported[MESA_FORMAT_I8] = true;
    ctx->TextureFormatSupported[MESA_FORMAT_AL88] = true;
-   if (intel->gen >= 4)
+   if (intel->gen >= 4) {
+      ctx->TextureFormatSupported[MESA_FORMAT_L16] = true;
+      ctx->TextureFormatSupported[MESA_FORMAT_A16] = true;
+      ctx->TextureFormatSupported[MESA_FORMAT_I16] = true;
       ctx->TextureFormatSupported[MESA_FORMAT_AL1616] = true;
+   }
 
    /* Depth and stencil */
    ctx->TextureFormatSupported[MESA_FORMAT_S8_Z24] = true;
-- 
1.7.7