Shaders for Android (GLES 2) (#10506)

Shader support for OpenGL ES 2 devices (Android)

Co-authored-by: sfan5 <sfan5@live.de>

1 files changed, 7 insertions, 6 deletions

diff --git a/client/shaders/nodes_shader/opengl_fragment.glsl b/client/shaders/nodes_shader/opengl_fragment.glsl
index 36d47d1f5..82c87073a 100644
--- a/client/shaders/nodes_shader/opengl_fragment.glsl
+++ b/client/shaders/nodes_shader/opengl_fragment.glsl
@@ -15,11 +15,12 @@ varying vec3 vPosition;
 // cameraOffset + worldPosition (for large coordinates the limits of float
 // precision must be considered).
 varying vec3 worldPosition;
-
+varying lowp vec4 varColor;
+varying mediump vec2 varTexCoord;
 varying vec3 eyeVec;
 
 const float fogStart = FOG_START;
-const float fogShadingParameter = 1 / ( 1 - fogStart);
+const float fogShadingParameter = 1.0 / ( 1.0 - fogStart);
 
 #ifdef ENABLE_TONE_MAPPING
 
@@ -56,13 +57,13 @@ vec4 applyToneMapping(vec4 color)
 void main(void)
 {
 	vec3 color;
-	vec2 uv = gl_TexCoord[0].st;
+	vec2 uv = varTexCoord.st;
 
 	vec4 base = texture2D(baseTexture, uv).rgba;
-
 #ifdef USE_DISCARD
 	// If alpha is zero, we can just discard the pixel. This fixes transparency
-	// on GPUs like GC7000L, where GL_ALPHA_TEST is not implemented in mesa.
+	// on GPUs like GC7000L, where GL_ALPHA_TEST is not implemented in mesa,
+	// and also on GLES 2, where GL_ALPHA_TEST is missing entirely.
 	if (base.a == 0.0) {
 		discard;
 	}
@@ -70,7 +71,7 @@ void main(void)
 
 	color = base.rgb;
 
-	vec4 col = vec4(color.rgb * gl_Color.rgb, 1.0); 
+	vec4 col = vec4(color.rgb * varColor.rgb, 1.0);
 	
 #ifdef ENABLE_TONE_MAPPING
 	col = applyToneMapping(col);