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render/gles2: provide public API to access GL texture

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Prior to this commit, compositors needed to render the texture to an
intermediate off-screen buffer using wlr_renderer APIs if they wanted to
use a custom rendering path (e.g. render to a 3D scene).

A new wlr_gles2_texture_get_attribs exposes the GL texture target and ID
so that compositors can render wlr_textures with their own shaders. An
example of a compositor doing so is available at [1].

[1]: 3db905b784/src/render.c (L227)
This commit is contained in:
Simon Ser 2019-11-06 11:19:52 +01:00 • committed by Drew DeVault
parent eaa98f6aff
commit 447835afc1
2 changed files with 28 additions and 1 deletions
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16
render/gles2/texture.c
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@ -17,9 +17,13 @@
static const struct wlr_texture_impl texture_impl;
bool wlr_texture_is_gles2(struct wlr_texture *wlr_texture) {
return wlr_texture->impl == &texture_impl;
}
struct wlr_gles2_texture *gles2_get_texture(
struct wlr_texture *wlr_texture) {
assert(wlr_texture->impl == &texture_impl);
assert(wlr_texture_is_gles2(wlr_texture));
return (struct wlr_gles2_texture *)wlr_texture;
}
@ -291,3 +295,13 @@ struct wlr_texture *wlr_gles2_texture_from_dmabuf(struct wlr_egl *egl,
POP_GLES2_DEBUG;
return &texture->wlr_texture;
}
void wlr_gles2_texture_get_attribs(struct wlr_texture *wlr_texture,
struct wlr_gles2_texture_attribs *attribs) {
struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
memset(attribs, 0, sizeof(*attribs));
attribs->target = texture->target;
attribs->tex = texture->tex;
attribs->inverted_y = texture->inverted_y;
attribs->has_alpha = texture->has_alpha;
}