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graphics: Refactoring shader

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Hajime Hoshi 2018-03-20 04:04:21 +09:00
parent bae8f9d874
commit a40dc5cf22
1 changed files with 3 additions and 5 deletions
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8
internal/graphics/shader.go
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@ -153,10 +153,8 @@ void main(void) {
#endif
#if defined(FILTER_SCREEN)
pos -= texel_size / 2.0 / scale;
highp vec2 p0 = pos;
highp vec2 p1 = pos + texel_size / scale;
highp vec2 p0 = pos - texel_size / 2.0 / scale;
highp vec2 p1 = pos + texel_size / 2.0 / scale;
vec4 c0 = texture2D(texture, p0);
vec4 c1 = texture2D(texture, vec2(p1.x, p0.y));
vec4 c2 = texture2D(texture, vec2(p0.x, p1.y));
@ -164,7 +162,7 @@ void main(void) {
// Texels must be in the source rect, so it is not necessary to check that like linear filter.
vec2 rateCenter = vec2(1.0, 1.0) - texel_size / 2.0 / scale;
vec2 rate = clamp(((fract(pos * source_size) - rateCenter) * scale) + rateCenter, 0.0, 1.0);
vec2 rate = clamp(((fract(p0 * source_size) - rateCenter) * scale) + rateCenter, 0.0, 1.0);
vec4 color = mix(mix(c0, c1, rate.x), mix(c2, c3, rate.x), rate.y);
#endif