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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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13
include/wlr/render/gles2.h
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@ -9,6 +9,7 @@
#ifndef WLR_RENDER_GLES2_H
#define WLR_RENDER_GLES2_H
#include <GLES2/gl2.h>
#include <wlr/backend.h>
#include <wlr/render/wlr_renderer.h>
@ -24,4 +25,16 @@ struct wlr_texture *wlr_gles2_texture_from_wl_drm(struct wlr_egl *egl,
struct wlr_texture *wlr_gles2_texture_from_dmabuf(struct wlr_egl *egl,
struct wlr_dmabuf_attributes *attribs);
struct wlr_gles2_texture_attribs {
GLenum target; /* either GL_TEXTURE_2D or GL_TEXTURE_EXTERNAL_OES */
GLuint tex;
bool inverted_y;
bool has_alpha;
};
bool wlr_texture_is_gles2(struct wlr_texture *texture);
void wlr_gles2_texture_get_attribs(struct wlr_texture *texture,
struct wlr_gles2_texture_attribs *attribs);
#endif