[Piglit] [PATCH] glsl-{fs|vs}-loop-300.shader_test: test simple loops of 300 iterations

[Brian Paul]

PS 3.0 only supports loops of up to 255 iterations.  Test a 300-iteration
loop to see what happens on platforms that eventually translate GLSL into
PS 3.0 shaders.
---
 tests/shaders/glsl-fs-loop-300.shader_test |   33 +++++++++++++++++++++++
 tests/shaders/glsl-vs-loop-300.shader_test |   40 ++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+), 0 deletions(-)
 create mode 100644 tests/shaders/glsl-fs-loop-300.shader_test
 create mode 100644 tests/shaders/glsl-vs-loop-300.shader_test

diff --git a/tests/shaders/glsl-fs-loop-300.shader_test b/tests/shaders/glsl-fs-loop-300.shader_test
new file mode 100644
index 0000000..b171b87
--- /dev/null
+++ b/tests/shaders/glsl-fs-loop-300.shader_test
@@ -0,0 +1,33 @@
+[require]
+GLSL >= 1.10
+
+[vertex shader file]
+glsl-mvp.vert
+
+[fragment shader]
+// Pass loop info as uniforms to avoid unrolling
+// We test 300 iterations because that's greater than PS3.0's 255 loop
+// iteration limit.
+uniform int iters;
+uniform float step;
+uniform float expected;
+void main()
+{
+	float sum = 0.0;
+	int i;
+	for (i = 0; i < iters; i++) {
+		sum += step;
+	}
+	if (sum == expected) {
+		gl_FragColor = vec4(0, 1, 0, 1); // green=good
+	} else {
+		gl_FragColor = vec4(1, 0, 0, 1); // red=bad
+	}
+}
+
+[test]
+uniform int iters 300
+uniform float step 1.0
+uniform float expected 300.0
+draw rect -1 -1 2 2
+probe rgb 1 1  0 1 0
diff --git a/tests/shaders/glsl-vs-loop-300.shader_test b/tests/shaders/glsl-vs-loop-300.shader_test
new file mode 100644
index 0000000..b856755
--- /dev/null
+++ b/tests/shaders/glsl-vs-loop-300.shader_test
@@ -0,0 +1,40 @@
+[require]
+GLSL >= 1.10
+
+[vertex shader]
+// Pass loop info as uniforms to avoid unrolling
+// We test 300 iterations because that's greater than PS3.0's 255 loop
+// iteration limit.
+uniform int iters;
+uniform float step;
+uniform float expected;
+varying vec4 color;
+void main()
+{
+	float sum = 0.0;
+	int i;
+	for (i = 0; i < iters; i++) {
+		sum += step;
+	}
+	if (sum == expected) {
+		color = vec4(0, 1, 0, 1); // green=good
+	} else {
+		color = vec4(1, 0, 0, 1); // red=bad
+	}
+	gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
+}
+
+
+[fragment shader]
+varying vec4 color;
+void main()
+{
+	gl_FragColor = color;
+}
+
+[test]
+uniform int iters 300
+uniform float step 1.0
+uniform float expected 300.0
+draw rect -1 -1 2 2
+probe rgb 1 1  0 1 0
-- 
1.7.3.4