diff options
| -rw-r--r-- | src/gallium/drivers/r300/r300_state_derived.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/gallium/drivers/r300/r300_state_derived.c b/src/gallium/drivers/r300/r300_state_derived.c index d715dd82f8..5e86d18a74 100644 --- a/src/gallium/drivers/r300/r300_state_derived.c +++ b/src/gallium/drivers/r300/r300_state_derived.c @@ -687,6 +687,25 @@ static uint32_t r300_get_border_color(enum pipe_format format, return uc.ui; } +static boolean util_format_is_float(enum pipe_format format) +{ + const struct util_format_description *desc = util_format_description(format); + unsigned i; + + if (!format) + return FALSE; + + /* Find the first non-void channel. */ + for (i = 0; i < 4; i++) + if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) + break; + + if (i == 4) + return FALSE; + + return desc->channel[i].type == UTIL_FORMAT_TYPE_FLOAT ? TRUE : FALSE; +} + static void r300_merge_textures_and_samplers(struct r300_context* r300) { struct r300_textures_state *state = @@ -822,6 +841,32 @@ static void r300_merge_textures_and_samplers(struct r300_context* r300) texstate->filter0 |= R300_TX_MAX_MIP_LEVEL(min_level); } + /* Float textures only support nearest and mip-nearest filtering. */ + if (util_format_is_float(tex->b.b.b.format)) { + /* No MAG linear filtering. */ + if ((texstate->filter0 & R300_TX_MAG_FILTER_MASK) == + R300_TX_MAG_FILTER_LINEAR) { + texstate->filter0 &= ~R300_TX_MAG_FILTER_MASK; + texstate->filter0 |= R300_TX_MAG_FILTER_NEAREST; + } + /* No MIN linear filtering. */ + if ((texstate->filter0 & R300_TX_MIN_FILTER_MASK) == + R300_TX_MIN_FILTER_LINEAR) { + texstate->filter0 &= ~R300_TX_MIN_FILTER_MASK; + texstate->filter0 |= R300_TX_MIN_FILTER_NEAREST; + } + /* No mipmap linear filtering. */ + if ((texstate->filter0 & R300_TX_MIN_FILTER_MIP_MASK) == + R300_TX_MIN_FILTER_MIP_LINEAR) { + texstate->filter0 &= ~R300_TX_MIN_FILTER_MIP_MASK; + texstate->filter0 |= R300_TX_MIN_FILTER_MIP_NEAREST; + } + /* No anisotropic filtering. */ + texstate->filter0 &= ~R300_TX_MAX_ANISO_MASK; + texstate->filter1 &= ~R500_TX_MAX_ANISO_MASK; + texstate->filter1 &= ~R500_TX_ANISO_HIGH_QUALITY; + } + texstate->filter0 |= i << 28; size += 16; |