github/mpv
1
Fork 0
mirror of https://github.com/mpv-player/mpv synced 2024-11-14 22:48:35 +01:00
Code Releases Activity

vo_opengl: improve boundary check for polar filters

Browse Source 
If the sampling point is placed diagonally, the radius difference
could be as large as sqrt(2.0). And a loosened check with (radius - 1)
would potentially include pixels out of the range.

Fix the check to handle those corner case properly to avoid
unnecessary texture lookup and improve the performance a bit.
This commit is contained in:
Bin Jin 2015-12-05 16:37:22 +00:00 committed by wm4
parent 30bbcd6452
commit 19b0b1df51
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
video/out/opengl/video_shaders.c
View File

@ -139,7 +139,7 @@ void pass_sample_polar(struct gl_shader_cache *sc, struct scaler *scaler)
continue;
GLSLF("d = length(vec2(%d.0, %d.0) - fcoord)/%f;\n", x, y, radius);
// Check for samples that might be skippable
if (dmax >= radius - 1)
if (dmax >= radius - M_SQRT2)
GLSLF("if (d < 1.0) {\n");
if (scaler->gl_target == GL_TEXTURE_1D) {
GLSL(w = texture1D(lut, d).r;)
@ -153,7 +153,7 @@ void pass_sample_polar(struct gl_shader_cache *sc, struct scaler *scaler)
GLSL(lo = min(lo, c);)
GLSL(hi = max(hi, c);)
}
if (dmax >= radius -1)
if (dmax >= radius - M_SQRT2)
GLSLF("}\n");
}
}