diff options
| -rw-r--r-- | DOCS/man/vo.rst | 6 | ||||
| -rw-r--r-- | video/out/opengl/video.c | 9 |
2 files changed, 12 insertions, 3 deletions
diff --git a/DOCS/man/vo.rst b/DOCS/man/vo.rst index 7eaf2d6636..8a7d235ca3 100644 --- a/DOCS/man/vo.rst +++ b/DOCS/man/vo.rst @@ -747,9 +747,9 @@ Available video output drivers are: Specifies the size of the resulting texture for this pass. ``szexpr`` refers to an expression in RPN (reverse polish notation), using the operators + - * / > < !, floating point - literals, and references to existing texture sizes such as - MAIN.width or CHROMA.height. By default, these are set to HOOKED.w - and HOOKED.h, respectively. + literals, and references to sizes of existing texture and OUTPUT + (such as MAIN.width or CHROMA.height). By default, these are set to + HOOKED.w and HOOKED.h, respectively. WHEN <szexpr> Specifies a condition that needs to be true (non-zero) for the diff --git a/video/out/opengl/video.c b/video/out/opengl/video.c index 21eda6bc7d..c9179c7800 100644 --- a/video/out/opengl/video.c +++ b/video/out/opengl/video.c @@ -1688,6 +1688,15 @@ static bool eval_szexpr(struct gl_video *p, struct img_tex tex, struct bstr name = expr[i].val.varname; struct img_tex var_tex; + // The size of OUTPUT is determined. It could be useful for certain + // user shaders to skip passes. + if (bstr_equals0(name, "OUTPUT")) { + int vp_w = p->dst_rect.x1 - p->dst_rect.x0; + int vp_h = p->dst_rect.y1 - p->dst_rect.y0; + stack[idx++] = (expr[i].tag == SZEXP_VAR_W) ? vp_w : vp_h; + continue; + } + // HOOKED is a special case if (bstr_equals0(name, "HOOKED")) { var_tex = tex; |