[Piglit] [PATCH 1/2] arb_texture_cube_map_array: sample-cube-map-array-shadow sample from second layer

[Dave Airlie]

This test wasn't actually testing array behaviour at all, so
wouldn't catch the case where the layer was getting lost.

This modifies the test so that it samples from the second layer,
and makes the contents of the first layer incorrect to catch
this case.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 .../sampler-cube-array-shadow.c                    | 30 ++++++++++++++--------
 1 file changed, 20 insertions(+), 10 deletions(-)

diff --git a/tests/spec/arb_texture_cube_map_array/sampler-cube-array-shadow.c b/tests/spec/arb_texture_cube_map_array/sampler-cube-array-shadow.c
index d80f596..35818ce 100644
--- a/tests/spec/arb_texture_cube_map_array/sampler-cube-array-shadow.c
+++ b/tests/spec/arb_texture_cube_map_array/sampler-cube-array-shadow.c
@@ -60,12 +60,13 @@ static GLfloat compvals[6][4] = { { -0.50,  0.00,  0.50,  0.00 },
 				  {  0.90,  0.90,  0.90,  0.90 } };
 
 #define STRIDE (5 * sizeof(GLfloat))
-void setup_texcoords(void)
+void setup_texcoords(float layer_sample)
 {
 	int i, j;
 	for (i = 0; i < 6; i++) {
 		for (j = 0; j < 4; j++) {
 			memcpy(cube_shadow_texcoords[i][j], cube_face_texcoords[i][j], 3 * sizeof(GLfloat));
+			cube_shadow_texcoords[i][j][3] = layer_sample;
 			cube_shadow_texcoords[i][j][4] = compvals[i][j];
 		}
 	}
@@ -109,17 +110,26 @@ loadTex(void)
 #define height 2
 #define width 2
 	int i, j;
-	GLfloat tex_vals[6][width][height];
+	GLfloat tex_vals[12][width][height];
 
 	/* Set the cubemap depth values for each face */
 	for (i=0; i < height; ++i) {
 		for (j=0; j < width; ++j) {
-			tex_vals[0][i][j] = 0.0;
-			tex_vals[1][i][j] = 0.2;
-			tex_vals[2][i][j] = 0.35;
-			tex_vals[3][i][j] = 0.50;
-			tex_vals[4][i][j] = 0.75;
-			tex_vals[5][i][j] = 1.0;
+			/* fill base layer with wrong stuff - checks
+			   we don't accidentally sample layer 0 */
+			tex_vals[0][i][j] = 1.0;
+			tex_vals[1][i][j] = 0.75;
+			tex_vals[2][i][j] = 0.50;
+			tex_vals[3][i][j] = 0.35;
+			tex_vals[4][i][j] = 0.2;
+			tex_vals[5][i][j] = 0.0;
+
+			tex_vals[6][i][j] = 0.0;
+			tex_vals[7][i][j] = 0.2;
+			tex_vals[8][i][j] = 0.35;
+			tex_vals[9][i][j] = 0.50;
+			tex_vals[10][i][j] = 0.75;
+			tex_vals[11][i][j] = 1.0;
 		}
 	}
 
@@ -144,7 +154,7 @@ loadTex(void)
 			GL_LEQUAL);
 
 	glTexImage3D(GL_TEXTURE_CUBE_MAP_ARRAY, 0, GL_DEPTH_COMPONENT,
-		     width, height, 6, 0, GL_DEPTH_COMPONENT, GL_FLOAT, (void*)tex_vals);
+		     width, height, 12, 0, GL_DEPTH_COMPONENT, GL_FLOAT, (void*)tex_vals);
 #undef height
 #undef width
 }
@@ -163,7 +173,7 @@ piglit_init(int argc, char **argv)
 	glLoadIdentity();
 	glClearColor(0.1, 0.1, 0.1, 1.0);
 	shaderSetup();
-	setup_texcoords();
+	setup_texcoords(1.0);
 }
 
 enum piglit_result
-- 
1.7.11.7