fixing depth texture access in GLSL shaders

core/glsl/copyimage.frag

@@ -45,6 +45,6 @@ void main() {
     out_Color = getElement2DNormalized(_colorTexture, _texParams, fragCoord);
 
 #ifndef NO_DEPTH
-    gl_FragDepth = getElement2DNormalized(_depthTexture, _texParams, fragCoord).z;
+    gl_FragDepth = getElement2DNormalized(_depthTexture, _texParams, fragCoord).r;
 #endif
 }

modules/vis/glsl/depthdarkening.frag

@@ -89,7 +89,7 @@ float applyDepthGaussFilter(in vec2 texCoord) {
     for (int i = -_halfKernelDimension; i <= _halfKernelDimension; ++i) {
         // TODO: why the fuck does abs(i) not work here?!?
         int absi = (i < 0) ? -i : i;
-        float curDepth = getElement2DNormalized(_depthPass2Texture, _pass2TexParams, texCoord + (_direction * _viewportSizeRCP * i)).z;
+        float curDepth = getElement2DNormalized(_depthPass2Texture, _pass2TexParams, texCoord + (_direction * _viewportSizeRCP * i)).r;
         result += curDepth * _gaussKernel[absi];
     }
     result /= _norm;
@@ -110,7 +110,7 @@ void main() {
         gl_FragDepth = filteredDepth;
     } else {
         // we are in the second vertical pass and have to modulate the color
-        float curDepth = getElement2DNormalized(_depthTexture, _texParams, texCoord).z;
+        float curDepth = getElement2DNormalized(_depthTexture, _texParams, texCoord).r;
         float deltaD = normalizeDepth(filteredDepth) - normalizeDepth(curDepth);
 
         // apply depth darkening

modules/vis/glsl/quadview.frag

@@ -38,5 +38,5 @@ uniform TextureParameters2D _texParams;
 
 void main() {
     out_Color = getElement2DNormalized(_colorTexture, _texParams, ex_TexCoord.xy);
-    gl_FragDepth = getElement2DNormalized(_depthTexture, _texParams, ex_TexCoord.xy).z;
+    gl_FragDepth = getElement2DNormalized(_depthTexture, _texParams, ex_TexCoord.xy).r;
 }

modules/vis/glsl/rendertargetcompositor.frag

@@ -48,19 +48,19 @@ void main() {
     if (_compositingMethod == 0) {
         // only first
         out_Color = getElement2DNormalized(_firstColor, _firstTexParams, ex_TexCoord.xy);
-        gl_FragDepth = getElement2DNormalized(_firstDepth, _firstTexParams, ex_TexCoord.xy).z;
+        gl_FragDepth = getElement2DNormalized(_firstDepth, _firstTexParams, ex_TexCoord.xy).r;
     }
     else if (_compositingMethod == 1) {
         // only second
         out_Color = getElement2DNormalized(_secondColor, _secondTexParams, ex_TexCoord.xy);
-        gl_FragDepth = getElement2DNormalized(_secondDepth, _secondTexParams, ex_TexCoord.xy).z;
+        gl_FragDepth = getElement2DNormalized(_secondDepth, _secondTexParams, ex_TexCoord.xy).r;
     }
     else if (_compositingMethod == 2) {
         // alpha blending
         vec4 firstColor = getElement2DNormalized(_firstColor, _firstTexParams, ex_TexCoord.xy);
-        float firstDepth = getElement2DNormalized(_firstDepth, _firstTexParams, ex_TexCoord.xy).z;
+        float firstDepth = getElement2DNormalized(_firstDepth, _firstTexParams, ex_TexCoord.xy).r;
         vec4 secondColor = getElement2DNormalized(_secondColor, _secondTexParams, ex_TexCoord.xy);
-        float secondDepth = getElement2DNormalized(_secondDepth, _secondTexParams, ex_TexCoord.xy).z;
+        float secondDepth = getElement2DNormalized(_secondDepth, _secondTexParams, ex_TexCoord.xy).r;
 
         out_Color = mix(firstColor, secondColor, _alpha);
         gl_FragDepth = min(firstDepth, secondDepth);
@@ -68,17 +68,17 @@ void main() {
     else if (_compositingMethod == 3) {
         // difference
         vec4 firstColor = getElement2DNormalized(_firstColor, _firstTexParams, ex_TexCoord.xy);
-        float firstDepth = getElement2DNormalized(_firstDepth, _firstTexParams, ex_TexCoord.xy).z;
+        float firstDepth = getElement2DNormalized(_firstDepth, _firstTexParams, ex_TexCoord.xy).r;
         vec4 secondColor = getElement2DNormalized(_secondColor, _secondTexParams, ex_TexCoord.xy);
-        float secondDepth = getElement2DNormalized(_secondDepth, _secondTexParams, ex_TexCoord.xy).z;
+        float secondDepth = getElement2DNormalized(_secondDepth, _secondTexParams, ex_TexCoord.xy).r;
 
         out_Color = vec4(vec3(1.0) - abs(firstColor - secondColor).xyz, max(firstColor.w, secondColor.w));
         gl_FragDepth = min(firstDepth, secondDepth);
     }
     else if (_compositingMethod == 4) {
         // depth test
-        float firstDepth = getElement2DNormalized(_firstDepth, _firstTexParams, ex_TexCoord.xy).z;
-        float secondDepth = getElement2DNormalized(_secondDepth, _secondTexParams, ex_TexCoord.xy).z;
+        float firstDepth = getElement2DNormalized(_firstDepth, _firstTexParams, ex_TexCoord.xy).r;
+        float secondDepth = getElement2DNormalized(_secondDepth, _secondTexParams, ex_TexCoord.xy).r;
 
         if (firstDepth > secondDepth) {
             out_Color = getElement2DNormalized(_secondColor, _secondTexParams, ex_TexCoord.xy);

modules/vis/glsl/virtualmirrorcombine.frag

@@ -45,8 +45,8 @@ uniform sampler2D _mirrorRenderedDepth;
 uniform TextureParameters2D _mirrorRenderedTexParams;
 
 void main() {
-    float normalDepth = getElement2DNormalized(_normalDepth, _normalTexParams, ex_TexCoord.xy).z;
-    float mirrorRenderedDepth = getElement2DNormalized(_mirrorRenderedDepth, _mirrorRenderedTexParams, ex_TexCoord.xy).z;
+    float normalDepth = getElement2DNormalized(_normalDepth, _normalTexParams, ex_TexCoord.xy).r;
+    float mirrorRenderedDepth = getElement2DNormalized(_mirrorRenderedDepth, _mirrorRenderedTexParams, ex_TexCoord.xy).r;
 
     if (normalDepth <= mirrorRenderedDepth) {
         out_Color = getElement2DNormalized(_normalColor, _normalTexParams, ex_TexCoord.xy);
@@ -54,7 +54,7 @@ void main() {
     }
     else {
         out_Color = getElement2DNormalized(_mirrorColor, _mirrorTexParams, ex_TexCoord.xy);
-        gl_FragDepth = getElement2DNormalized(_mirrorDepth, _mirrorTexParams, ex_TexCoord.xy).z;
+        gl_FragDepth = getElement2DNormalized(_mirrorDepth, _mirrorTexParams, ex_TexCoord.xy).r;
     }
 
     if (out_Color.a == 0) {