fpglsl: a few more useful glsl tests

progs/fpglsl/dowhile.glsl

@@ -0,0 +1,8 @@
+void main() {
+    float sum = 0.0;
+    do {
+	sum += 0.1;
+	break;
+    } while (true);
+    gl_FragColor = vec4(sum);
+}

progs/fpglsl/dowhile2.glsl

@@ -0,0 +1,10 @@
+void main() {
+    float sum = 0.0;
+    do {
+	sum += 0.1;
+	if (sum < 0.499999)
+	    continue;
+	break;
+    } while (true);
+    gl_FragColor = vec4(sum);
+}

progs/fpglsl/forbreak.glsl

@@ -0,0 +1,13 @@
+uniform int KernelSizeInt;
+
+void main() {
+    int i;
+    vec4 sum = vec4(0.0);
+    for (i = 0; i < KernelSizeInt; ++i) {
+	sum.g += 0.25;
+        if (i > 0)
+           break;
+    }
+    sum.a = 1;
+    gl_FragColor = sum;
+}

progs/fpglsl/simpleif.glsl

@@ -0,0 +1,6 @@
+void main() {
+    // this should always be true
+    if (gl_FragCoord.x >= 0.0) {
+	gl_FragColor = vec4(0.5, 0.0, 0.5, 1.0);
+    }
+}

progs/fpglsl/while2.glsl

@@ -0,0 +1,9 @@
+void main() {
+    float sum = 0.0;
+    while (true) {
+	sum += 0.1;
+        if (sum > 0.8)
+           break;
+    }
+    gl_FragColor = vec4(sum);
+}