On 11/04/2011 03:01 PM, Eric Anholt wrote:
Texture filtering is not supported on floating-point textures until gen5, which showed up as failures in texwrap in particular. --- src/mesa/drivers/dri/intel/intel_extensions.c | 13 +++++++------ 1 files changed, 7 insertions(+), 6 deletions(-)diff --git a/src/mesa/drivers/dri/intel/intel_extensions.c b/src/mesa/drivers/dri/intel/intel_extensions.c index 7a5ef3e..5212168 100644 --- a/src/mesa/drivers/dri/intel/intel_extensions.c +++ b/src/mesa/drivers/dri/intel/intel_extensions.c @@ -93,8 +93,14 @@ intelInitExtensions(struct gl_context *ctx) ctx->Const.GLSLVersion = 120; _mesa_override_glsl_version(ctx); - if (intel->gen>= 5) + if (intel->gen>= 5) { ctx->Extensions.EXT_timer_query = true; +#ifdef TEXTURE_FLOAT_ENABLED + ctx->Extensions.ARB_texture_float = true; + ctx->Extensions.EXT_texture_shared_exponent = true; + ctx->Extensions.EXT_packed_float = true; +#endif + } if (intel->gen>= 4) { ctx->Extensions.ARB_color_buffer_float = true; @@ -107,11 +113,6 @@ intelInitExtensions(struct gl_context *ctx) ctx->Extensions.ARB_point_sprite = true; ctx->Extensions.ARB_seamless_cube_map = true; ctx->Extensions.ARB_shader_texture_lod = true; -#ifdef TEXTURE_FLOAT_ENABLED - ctx->Extensions.ARB_texture_float = true; - ctx->Extensions.EXT_texture_shared_exponent = true; - ctx->Extensions.EXT_packed_float = true; -#endif ctx->Extensions.ARB_texture_compression_rgtc = true; ctx->Extensions.ARB_texture_rg = true; ctx->Extensions.EXT_draw_buffers2 = true;
Based on my reading of Vol_4_G45_subsystem.pdf pages 131-132, it looks like texture filtering is supported for R9G9B9E5_SHAREDEXP, so I think we ought to be able to leave EXT_texture_shared_exponent enabled.
It also looks like filtering is supported for R11G11B10_FLOAT, so we might be able to leave EXT_packed_float enabled as well.
I agree that we can't do ARB_texture_float---texture filtering is clearly not supported for R32G32B32A32_FLOAT.
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