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Avoid relying origin_upper_left

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It seems to cause considerable glitches when resizing.
This commit is contained in:
Héctor Ramón Jiménez 2020-05-21 01:01:47 +02:00
parent e0e4ee73fe
commit d77492c0c3
2 changed files with 17 additions and 3 deletions
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9
glow/src/shader/quad.frag
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@ -1,6 +1,7 @@
#version 450
layout(origin_upper_left) in vec4 gl_FragCoord;
layout(location = 2) uniform float u_Screen_Height;
layout(location = 0) in vec4 v_Color;
layout(location = 1) in vec4 v_BorderColor;
layout(location = 2) in vec2 v_Pos;
@ -31,12 +32,14 @@ float distance(in vec2 frag_coord, in vec2 position, in vec2 size, float radius)
void main() {
vec4 mixed_color;
vec2 fragCoord = vec2(gl_FragCoord.x, u_Screen_Height - gl_FragCoord.y);
// TODO: Remove branching (?)
if(v_BorderWidth > 0) {
float internal_border = max(v_BorderRadius - v_BorderWidth, 0);
float internal_distance = distance(
gl_FragCoord.xy,
fragCoord,
v_Pos + vec2(v_BorderWidth),
v_Scale - vec2(v_BorderWidth * 2.0),
internal_border
@ -54,7 +57,7 @@ void main() {
}
float d = distance(
gl_FragCoord.xy,
fragCoord,
v_Pos,
v_Scale,
v_BorderRadius