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render/vulkan: allow rendering to non-8-bit buffers

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This is implemented by a two-subpass rendering scheme; the first
subpass draws (and blends) onto a linear R16G16B16A16_SFLOAT buffer,
while the second subpass performs linear->srgb conversion, writing
onto the actual output buffer.
This commit is contained in:
Manuel Stoeckl 2022-11-19 21:47:27 -05:00 • committed by Simon Ser
parent 8cdc4b7a31
commit 10dd416694
5 changed files with 651 additions and 90 deletions
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3
render/vulkan/pixel_format.c
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@ -293,10 +293,9 @@ static bool query_modifier_support(struct wlr_vk_device *dev,
char render_status[256], texture_status[256];
// check that specific modifier for render usage
// also, only allow rendering to formats with SRGB encoding
const char *errmsg = "unknown error";
if ((m.drmFormatModifierTilingFeatures & render_features) == render_features &&
props->format.is_srgb && !props->format.is_ycbcr) {
!props->format.is_ycbcr) {
struct wlr_vk_format_modifier_props p = {0};
if (query_modifier_usage_support(dev, props->format.vk, render_usage, &m, &p, &errmsg)) {
props->dmabuf.render_mods[props->dmabuf.render_mod_count++] = p;