Fix noise generation on GLES

gonetz · Aug 4, 2024 · cb06d7b · cb06d7b
1 parent 24f7f47
commit cb06d7b
Showing 1 changed file with 7 additions and 7 deletions.
diff --git a/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilderCommon.cpp b/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilderCommon.cpp
@@ -1004,11 +1004,11 @@ class ShaderNoise : public ShaderPart
  ShaderNoise(const opengl::GLInfo & _glinfo)
  {
  m_part =
- "uniform float uNoiseSeed;  \n"
+ "uniform mediump float uNoiseSeed; \n"
  "lowp float snoise() \n"
  "{ \n"
- " mediump vec2 coord = floor(gl_FragCoord.xy/uScreenScale); \n"
- " mediump vec3 p3 = vec3(uNoiseSeed, coord); \n"
+ " highp vec2 coord = floor(gl_FragCoord.xy/uScreenScale);\n"
+ " highp vec3 p3 = vec3(uNoiseSeed, coord);  \n"
  // hash13 from https://www.shadertoy.com/view/4djSRW
  " p3 = fract(p3 * .1031); \n"
  " p3 += dot(p3, p3.zyx + 31.32); \n"
@@ -1068,8 +1068,8 @@ class ShaderDither : public ShaderPart
  m_part +=
  " lowp float mult = 1.0; \n";
  m_part +=
- " mediump vec2 coord = floor(mult * (gl_FragCoord.xy/uScreenScale)); \n"
- " mediump vec3 p3 = vec3(uNoiseSeed, coord); \n"
+ " highp vec2 coord = floor(mult * (gl_FragCoord.xy/uScreenScale));\n"
+ " highp vec3 p3 = vec3(uNoiseSeed, coord);  \n"
  // hash33 from https://www.shadertoy.com/view/4djSRW
  " p3 = fract(p3 * vec3(.1031, .1030, .0973)); \n"
  " p3 += dot(p3, p3.yxz+33.33); \n"
@@ -1087,8 +1087,8 @@ class ShaderDither : public ShaderPart
  " lowp float mult = 1.0; \n";
  m_part +=
  " \n"
- " mediump vec2 coord = floor(mult * (gl_FragCoord.xy/uScreenScale)); \n"
- " mediump vec3 p3 = vec3(uNoiseSeed, coord); \n"
+ " highp vec2 coord = floor(mult * (gl_FragCoord.xy/uScreenScale));\n"
+ " highp vec3 p3 = vec3(uNoiseSeed, coord);  \n"
  // hash13 from https://www.shadertoy.com/view/4djSRW
  " p3 = fract(p3 * .1031); \n"
  " p3 += dot(p3, p3.zyx + 31.32); \n"