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zink: handle emulated alpha format clears

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technically zink doesn't support this, but mesa/st doesn't care what drivers
support for clears

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17687>
This commit is contained in:
Mike Blumenkrantz
2022-08-02 08:33:02 -04:00
committed by Marge Bot
parent 89c41a7750
commit d5bf01e214
1 changed files with 27 additions and 1 deletions
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src/gallium/drivers/zink/zink_clear.c
+27 -1
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@@ -23,6 +23,7 @@
#include "zink_context.h"
#include "zink_kopper.h"
#include "zink_format.h"
#include "zink_framebuffer.h"
#include "zink_query.h"
#include "zink_resource.h"
@@ -254,17 +255,42 @@ zink_clear(struct pipe_context *pctx,
for (unsigned i = 0; i < fb->nr_cbufs; i++) {
if ((buffers & (PIPE_CLEAR_COLOR0 << i)) && fb->cbufs[i]) {
struct pipe_surface *psurf = fb->cbufs[i];
bool emulated_alpha = zink_format_is_emulated_alpha(psurf->format);
const struct util_format_description *desc = util_format_description(psurf->format);
struct zink_framebuffer_clear *fb_clear = &ctx->fb_clears[i];
struct zink_framebuffer_clear_data *clear = get_clear_data(ctx, fb_clear, needs_rp ? scissor_state : NULL);
const union pipe_color_union *color = pcolor;
union pipe_color_union tmp;
ctx->clears_enabled |= PIPE_CLEAR_COLOR0 << i;
clear->conditional = ctx->render_condition_active;
clear->has_scissor = needs_rp;
if (scissor_state && needs_rp)
clear->scissor = *scissor_state;
if (emulated_alpha) {
tmp = *pcolor;
if (util_format_is_alpha(psurf->format)) {
tmp.ui[0] = tmp.ui[3];
tmp.ui[1] = 0;
tmp.ui[2] = 0;
tmp.ui[3] = 0;
} else if (util_format_is_luminance(psurf->format)) {
tmp.ui[1] = tmp.ui[0];
tmp.ui[2] = tmp.ui[0];
tmp.f[3] = 1.0;
} else if (util_format_is_luminance_alpha(psurf->format)) {
tmp.f[3] = tmp.ui[1];
tmp.ui[1] = tmp.ui[0];
tmp.ui[2] = tmp.ui[0];
} else /* zink_format_is_red_alpha */ {
tmp.ui[1] = tmp.ui[3];
tmp.ui[2] = 0;
tmp.ui[3] = 0;
}
color = &tmp;
}
for (unsigned i = 0; i < 4; i++)
clamp_color(desc, &clear->color, pcolor, i);
clamp_color(desc, &clear->color, color, i);
if (zink_fb_clear_first_needs_explicit(fb_clear))
ctx->rp_clears_enabled &= ~(PIPE_CLEAR_COLOR0 << i);
else