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iris: Use R/RG instead of I/L/A when sampling

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This commit is contained in:
Kenneth Graunke 2018-10-07 20:47:21 -07:00
parent 94569a6458
commit bfbebbaa36
1 changed files with 31 additions and 0 deletions
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31
src/gallium/drivers/iris/iris_formats.c
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@ -400,6 +400,26 @@ iris_isl_format_for_pipe_format(enum pipe_format pf)
return table[pf];
}
static enum pipe_format
alpha_to_red(enum pipe_format pf)
{
switch (pf) {
case PIPE_FORMAT_A8_UNORM: return PIPE_FORMAT_R8_UNORM;
case PIPE_FORMAT_A16_UNORM: return PIPE_FORMAT_R16_UNORM;
case PIPE_FORMAT_A8_SNORM: return PIPE_FORMAT_R8_SNORM;
case PIPE_FORMAT_A16_SNORM: return PIPE_FORMAT_R16_SNORM;
case PIPE_FORMAT_A16_FLOAT: return PIPE_FORMAT_R16_FLOAT;
case PIPE_FORMAT_A32_FLOAT: return PIPE_FORMAT_R32_FLOAT;
case PIPE_FORMAT_A8_UINT: return PIPE_FORMAT_A8_UINT;
case PIPE_FORMAT_A8_SINT: return PIPE_FORMAT_A8_SINT;
case PIPE_FORMAT_A16_UINT: return PIPE_FORMAT_R16_UINT;
case PIPE_FORMAT_A16_SINT: return PIPE_FORMAT_R16_SINT;
case PIPE_FORMAT_A32_UINT: return PIPE_FORMAT_R32_UINT;
case PIPE_FORMAT_A32_SINT: return PIPE_FORMAT_R32_SINT;
default: return pf;
}
}
struct iris_format_info
iris_format_for_usage(const struct gen_device_info *devinfo,
enum pipe_format pformat,
@ -407,6 +427,17 @@ iris_format_for_usage(const struct gen_device_info *devinfo,
{
struct isl_swizzle swizzle = ISL_SWIZZLE_IDENTITY;
if ((usage & ISL_SURF_USAGE_TEXTURE_BIT) && !util_format_is_srgb(pformat)) {
if (util_format_is_intensity(pformat)) {
swizzle = ISL_SWIZZLE(RED, RED, RED, RED);
} else if (util_format_is_luminance(pformat)) {
swizzle = ISL_SWIZZLE(RED, RED, RED, ONE);
} else if (util_format_is_alpha(pformat)) {
pformat = alpha_to_red(pformat);
swizzle = ISL_SWIZZLE(ZERO, ZERO, ZERO, RED);
}
}
enum isl_format format = iris_isl_format_for_pipe_format(pformat);
/* Convert RGBX into RGBA for rendering or typed image access. */