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graphicsdriver/opengl: Move comments

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This commit is contained in:
Hajime Hoshi 2020-06-24 23:52:39 +09:00
parent 20b5be0886
commit bfc2fffba6
1 changed files with 3 additions and 2 deletions
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5
internal/graphicsdriver/opengl/defaultshader.go
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@ -194,6 +194,9 @@ void main(void) {
#if defined(FILTER_LINEAR)
vec4 color;
highp vec2 texel_size = 1.0 / source_size;
// Shift 1/512 [texel] to avoid the tie-breaking issue.
// As all the vertex positions are aligned to 1/16 [pixel], this shiting should work in most cases.
highp vec2 p0 = pos - (texel_size) / 2.0 + (texel_size / 512.0);
highp vec2 p1 = pos + (texel_size) / 2.0 + (texel_size / 512.0);
@ -229,8 +232,6 @@ void main(void) {
highp vec2 texel_size = 1.0 / source_size;
highp vec2 half_scaled_texel_size = texel_size / 2.0 / scale;
// Shift 1/512 [texel] to avoid the tie-breaking issue.
// As all the vertex positions are aligned to 1/16 [pixel], this shiting should work in most cases.
highp vec2 p0 = pos - half_scaled_texel_size + (texel_size / 512.0);
highp vec2 p1 = pos + half_scaled_texel_size + (texel_size / 512.0);