Fix distancefield shaders to compile on OpenGL ES

Remove invalid highp qualifiers from the shaders

Fixes: QT3DS-3262
Change-Id: I3c42b08aded38f42ab3814a0d76d02da5f63c318
Reviewed-by: Antti Määttä <antti.maatta@qt.io>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

2 files changed, 4 insertions, 4 deletions

diff --git a/src/runtime/shaders/distancefieldtext.vert b/src/runtime/shaders/distancefieldtext.vert
index 879545f..7a111bc 100644
--- a/src/runtime/shaders/distancefieldtext.vert
+++ b/src/runtime/shaders/distancefieldtext.vert
@@ -30,7 +30,7 @@ highp vec2 alphaRange(highp float scale)
     highp float range = spreadFunc(scale);
     highp float alphaMin = max(0.0, base - range);
     highp float alphaMax = min(base + range, 1.0);
-    return highp vec2(alphaMin, alphaMax);
+    return vec2(alphaMin, alphaMax);
 }
 
 highp float determinantOfSubmatrix(highp mat4 m, int col0, int col1, int row0, int row1)
@@ -59,6 +59,6 @@ void main()
 {
     highp float scale = fontScale * sqrt(abs(determinant(modelView)));
     alphas = alphaRange(scale);
-    sampleCoord = tCoord * highp vec2(1.0 / highp float(textureWidth), 1.0 / highp float(textureHeight));
+    sampleCoord = tCoord * vec2(1.0 / float(textureWidth), 1.0 / float(textureHeight));
     gl_Position = mvp * vCoord;
 }
diff --git a/src/runtime/shaders/distancefieldtext_dropshadow.vert b/src/runtime/shaders/distancefieldtext_dropshadow.vert
index 69fd211..65e8e00 100644
--- a/src/runtime/shaders/distancefieldtext_dropshadow.vert
+++ b/src/runtime/shaders/distancefieldtext_dropshadow.vert
@@ -34,7 +34,7 @@ highp vec2 alphaRange(highp float scale)
     highp float range = spreadFunc(scale);
     highp float alphaMin = max(0.0, base - range);
     highp float alphaMax = min(base + range, 1.0);
-    return highp vec2(alphaMin, alphaMax);
+    return vec2(alphaMin, alphaMax);
 }
 
 highp float determinantOfSubmatrix(highp mat4 m, int col0, int col1, int row0, int row1)
@@ -64,7 +64,7 @@ void main()
     highp float scale = fontScale * sqrt(abs(determinant(modelView)));
     alphas = alphaRange(scale);
 
-    highp vec2 textureSizeMultiplier = highp vec2(1.0 / highp float(textureWidth), 1.0 / highp float(textureHeight));
+    highp vec2 textureSizeMultiplier = vec2(1.0 / highp float(textureWidth), 1.0 / float(textureHeight));
 
     sampleCoord = tCoord * textureSizeMultiplier;
     shadowSampleCoord = (tCoord - shadowOffset) * textureSizeMultiplier;