[Mesa-dev] [PATCH 6/7] i965: Add support for MESA_FORMAT_Z32_FLOAT and expose it under 3.0 override.

[Eric Anholt]

The MESA_FORMAT_Z32_FLOAT_X24S8 support will come later, and involves
a bunch of trickery with hiz.  Also, Z32_FLOAT will fail for swrast
paths until they change to MapRenderbuffer.
---
 src/mesa/drivers/dri/i965/brw_wm_surface_state.c |    5 +++++
 src/mesa/drivers/dri/intel/intel_extensions.c    |    2 ++
 2 files changed, 7 insertions(+), 0 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 d51fdac..8cfd6db 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -541,6 +541,7 @@ brw_init_surface_formats(struct brw_context *brw)
    brw->format_supported_as_render_target[MESA_FORMAT_X8_Z24] = true;
    brw->format_supported_as_render_target[MESA_FORMAT_S8] = true;
    brw->format_supported_as_render_target[MESA_FORMAT_Z16] = true;
+   brw->format_supported_as_render_target[MESA_FORMAT_Z32_FLOAT] = true;
 
    /* We remap depth formats to a supported texturing format in
     * translate_tex_format().
@@ -548,6 +549,7 @@ brw_init_surface_formats(struct brw_context *brw)
    ctx->TextureFormatSupported[MESA_FORMAT_S8_Z24] = true;
    ctx->TextureFormatSupported[MESA_FORMAT_X8_Z24] = true;
    ctx->TextureFormatSupported[MESA_FORMAT_Z16] = true;
+   ctx->TextureFormatSupported[MESA_FORMAT_Z32_FLOAT] = true;
 }
 
 bool
@@ -575,6 +577,9 @@ translate_tex_format(gl_format mesa_format,
    case MESA_FORMAT_X8_Z24:
       return BRW_SURFACEFORMAT_I24X8_UNORM;
 
+   case MESA_FORMAT_Z32_FLOAT:
+      return BRW_SURFACEFORMAT_I32_FLOAT;
+
    case MESA_FORMAT_SARGB8:
    case MESA_FORMAT_SLA8:
    case MESA_FORMAT_SL8:
diff --git a/src/mesa/drivers/dri/intel/intel_extensions.c b/src/mesa/drivers/dri/intel/intel_extensions.c
index 681f5f2..2e2a31f 100644
--- a/src/mesa/drivers/dri/intel/intel_extensions.c
+++ b/src/mesa/drivers/dri/intel/intel_extensions.c
@@ -109,6 +109,8 @@ intelInitExtensions(struct gl_context *ctx)
 
    if (intel->gen >= 4) {
       ctx->Extensions.ARB_color_buffer_float = true;
+      if (override_version >= 30)
+	 ctx->Extensions.ARB_depth_buffer_float = true;
       ctx->Extensions.ARB_depth_clamp = true;
       ctx->Extensions.ARB_fragment_coord_conventions = true;
       ctx->Extensions.ARB_fragment_program_shadow = true;
-- 
1.7.7.3