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radv: adjust determining if alpha should be on MSB

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Ported from RadeonSI.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29308>
This commit is contained in:
Samuel Pitoiset
2024-05-21 15:22:22 +02:00
parent 68c4d26691
commit 179f4ed414
1 changed files with 7 additions and 3 deletions
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10
src/amd/vulkan/radv_image.c
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@@ -772,11 +772,15 @@ vi_alpha_is_on_msb(const struct radv_device *device, const VkFormat format)
return false;
const struct util_format_description *desc = vk_format_description(format);
const uint32_t comp_swap = ac_translate_colorswap(pdev->info.gfx_level, desc->format, false);
if (pdev->info.gfx_level >= GFX10 && desc->nr_channels == 1)
return desc->swizzle[3] == PIPE_SWIZZLE_X;
/* The following code matches the hw behavior. */
if (desc->nr_channels == 1) {
return (comp_swap == V_028C70_SWAP_ALT_REV) !=
(pdev->info.family == CHIP_RAVEN2 || pdev->info.family == CHIP_RENOIR);
}
return ac_translate_colorswap(pdev->info.gfx_level, desc->format, false) <= 1;
return comp_swap != V_028C70_SWAP_STD_REV && comp_swap != V_028C70_SWAP_ALT_REV;
}
static void