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vrend: avoid srgb views on eglimage-backed surfaces

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Continue using the existing option to manually encode writes to such
surfaces via fragment shader glsl augmentation.

Uses the new vrend_resource_supports_view() to detect this scenario.

Signed-off-by: Ryan Neph <ryanneph@google.com>
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests/725>
macos/master
Ryan Neph 2 years ago committed by Marge Bot
parent 4bcc867600
commit 187e651304
1 changed files with 20 additions and 15 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 35
      src/vrend_renderer.c

35
src/vrend_renderer.c
Unescape View File

@ -1958,9 +1958,12 @@ int vrend_create_surface(struct vrend_context *ctx,
int first_layer = surf->val1 & 0xffff;
int last_layer = (surf->val1 >> 16) & 0xffff;
if ((first_layer != last_layer &&
(first_layer != 0 || (last_layer != (int)util_max_layer(&res->base, surf->val0)))) ||
surf->format != res->base.format) {
bool needs_view = first_layer != last_layer &&
(first_layer != 0 || (last_layer != (int)util_max_layer(&res->base, surf->val0)));
if (!needs_view && surf->format != res->base.format)
needs_view = true;
if (needs_view && vrend_resource_supports_view(res, surf->format)) {
GLenum target = res->target;
GLenum internalformat = tex_conv_table[format].internalformat;
@ -2646,21 +2649,23 @@ static void vrend_hw_emit_framebuffer_state(struct vrend_sub_context *sub_ctx)
for (int i = 0; i < sub_ctx->nr_cbufs; i++) {
if (sub_ctx->surf[i]) {
struct vrend_surface *surf = sub_ctx->surf[i];
if (vrend_resource_is_emulated_bgra(surf->texture)) {
VREND_DEBUG(dbg_bgra, sub_ctx->parent, "swizzling output for 0x%x (surface format is %s; resource format is %s)\n",
i, util_format_name(surf->format), util_format_name(surf->texture->base.format));
/* glTextureView() is not applied to eglimage-backed surfaces, because it
* causes unintended format interpretation errors. But a swizzle may still
* be necessary, e.g. for rgb* views on bgr* resources. Ensure this
* happens by adding a shader swizzle to the final write of such surfaces.
*/
if (!vrend_resource_supports_view(surf->texture, surf->format) &&
!vrend_format_is_bgra(surf->format)) {
sub_ctx->swizzle_output_rgb_to_bgr |= 1 << i;
}
/* [R8G8B8|B8G8R8]X8_UNORM formatted resources imported to mesa as EGL images occupy 24bpp instead of
* more common 32bpp (with an ignored alpha channel). GL_RGB8 internal format must be specified when
* interacting with these textures in the host driver. Unfortunately, GL_SRGB8 is not guaranteed to
* be color-renderable on either GL or GLES, and is typically not supported. Thus, rendering to such
* surfaces by using an SRGB texture view will have no colorspace conversion effects.
* To work around this, manual colorspace conversion is used instead in the fragment shader and
* during glClearColor() setting.
*/
if (vrend_resource_has_24bpp_internal_format(surf->texture) && util_format_is_srgb(surf->format)) {
/* glTextureView() on eglimage-backed bgr* textures for is not supported.
* To work around this for colorspace conversion, views are avoided
* manual colorspace conversion is instead injected in the fragment
* shader writing to such surfaces and during glClearColor(). */
if (util_format_is_srgb(surf->format) &&
!vrend_resource_supports_view(surf->texture, surf->format)) {
VREND_DEBUG(dbg_tex, sub_ctx->parent,
"manually converting linear->srgb for EGL-backed framebuffer color attachment 0x%x"
" (surface format is %s; resource format is %s)\n",

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