test/utils.[ch]: Add new function operator_name()

This function returns the name of the given operator, which is useful
for printing out debug information. The function is done as a switch
without a default value so that the compiler will warn if new
operators are added in the future.

The function is used in affine-test.c, scaling-test.c, and
blitters-test.c.

5 files changed, 78 insertions, 6 deletions

diff --git a/test/affine-test.c b/test/affine-test.c
index f60ec14..477c1e1 100644
--- a/test/affine-test.c
+++ b/test/affine-test.c
@@ -201,8 +201,8 @@ test_composite (int      testnum,
 	transform.matrix[r][c]
 
 	printf ("src_fmt=%08X, dst_fmt=%08X\n", src_fmt, dst_fmt);
-	printf ("op=%d, repeat=%d, transform=\n",
-	        op, repeat);
+	printf ("op=%s, repeat=%d, transform=\n",
+	        operator_name (op), repeat);
 	printf (" { { { 0x%08x, 0x%08x, 0x%08x },\n"
 		"     { 0x%08x, 0x%08x, 0x%08x },\n"
 		"     { 0x%08x, 0x%08x, 0x%08x },\n"
diff --git a/test/blitters-test.c b/test/blitters-test.c
index 9bde99c..c5b452c 100644
--- a/test/blitters-test.c
+++ b/test/blitters-test.c
@@ -329,8 +329,8 @@ test_composite (int testnum, int verbose)
 
     if (verbose)
     {
-	printf ("op=%d, src_fmt=%08X, dst_fmt=%08X, mask_fmt=%08X\n",
-	    op, src_fmt, dst_fmt, mask_fmt);
+	printf ("op=%s, src_fmt=%08X, dst_fmt=%08X, mask_fmt=%08X\n",
+	    operator_name (op), src_fmt, dst_fmt, mask_fmt);
 	printf ("src_width=%d, src_height=%d, dst_width=%d, dst_height=%d\n",
 	    src_width, src_height, dst_width, dst_height);
 	printf ("src_x=%d, src_y=%d, dst_x=%d, dst_y=%d\n",
diff --git a/test/scaling-test.c b/test/scaling-test.c
index 64c12dd..173179c 100644
--- a/test/scaling-test.c
+++ b/test/scaling-test.c
@@ -240,8 +240,8 @@ test_composite (int      testnum,
     if (verbose)
     {
 	printf ("src_fmt=%08X, dst_fmt=%08X\n", src_fmt, dst_fmt);
-	printf ("op=%d, scale_x=%d, scale_y=%d, repeat=%d\n",
-	        op, scale_x, scale_y, repeat);
+	printf ("op=%s, scale_x=%d, scale_y=%d, repeat=%d\n",
+	        operator_name (op), scale_x, scale_y, repeat);
 	printf ("translate_x=%d, translate_y=%d\n",
 	        translate_x, translate_y);
 	printf ("src_width=%d, src_height=%d, dst_width=%d, dst_height=%d\n",
diff --git a/test/utils.c b/test/utils.c
index 08eaabb..480129b 100644
--- a/test/utils.c
+++ b/test/utils.c
@@ -870,6 +870,75 @@ initialize_palette (pixman_indexed_t *palette, uint32_t depth, int is_rgb)
     }
 }
 
+const char *
+operator_name (pixman_op_t op)
+{
+    switch (op)
+    {
+    case PIXMAN_OP_CLEAR: return "PIXMAN_OP_CLEAR";
+    case PIXMAN_OP_SRC: return "PIXMAN_OP_SRC";
+    case PIXMAN_OP_DST: return "PIXMAN_OP_DST";
+    case PIXMAN_OP_OVER: return "PIXMAN_OP_OVER";
+    case PIXMAN_OP_OVER_REVERSE: return "PIXMAN_OP_OVER_REVERSE";
+    case PIXMAN_OP_IN: return "PIXMAN_OP_IN";
+    case PIXMAN_OP_IN_REVERSE: return "PIXMAN_OP_IN_REVERSE";
+    case PIXMAN_OP_OUT: return "PIXMAN_OP_OUT";
+    case PIXMAN_OP_OUT_REVERSE: return "PIXMAN_OP_OUT_REVERSE";
+    case PIXMAN_OP_ATOP: return "PIXMAN_OP_ATOP";
+    case PIXMAN_OP_ATOP_REVERSE: return "PIXMAN_OP_ATOP_REVERSE";
+    case PIXMAN_OP_XOR: return "PIXMAN_OP_XOR";
+    case PIXMAN_OP_ADD: return "PIXMAN_OP_ADD";
+    case PIXMAN_OP_SATURATE: return "PIXMAN_OP_SATURATE";
+
+    case PIXMAN_OP_DISJOINT_CLEAR: return "PIXMAN_OP_DISJOINT_CLEAR";
+    case PIXMAN_OP_DISJOINT_SRC: return "PIXMAN_OP_DISJOINT_SRC";
+    case PIXMAN_OP_DISJOINT_DST: return "PIXMAN_OP_DISJOINT_DST";
+    case PIXMAN_OP_DISJOINT_OVER: return "PIXMAN_OP_DISJOINT_OVER";
+    case PIXMAN_OP_DISJOINT_OVER_REVERSE: return "PIXMAN_OP_DISJOINT_OVER_REVERSE";
+    case PIXMAN_OP_DISJOINT_IN: return "PIXMAN_OP_DISJOINT_IN";
+    case PIXMAN_OP_DISJOINT_IN_REVERSE: return "PIXMAN_OP_DISJOINT_IN_REVERSE";
+    case PIXMAN_OP_DISJOINT_OUT: return "PIXMAN_OP_DISJOINT_OUT";
+    case PIXMAN_OP_DISJOINT_OUT_REVERSE: return "PIXMAN_OP_DISJOINT_OUT_REVERSE";
+    case PIXMAN_OP_DISJOINT_ATOP: return "PIXMAN_OP_DISJOINT_ATOP";
+    case PIXMAN_OP_DISJOINT_ATOP_REVERSE: return "PIXMAN_OP_DISJOINT_ATOP_REVERSE";
+    case PIXMAN_OP_DISJOINT_XOR: return "PIXMAN_OP_DISJOINT_XOR";
+
+    case PIXMAN_OP_CONJOINT_CLEAR: return "PIXMAN_OP_CONJOINT_CLEAR";
+    case PIXMAN_OP_CONJOINT_SRC: return "PIXMAN_OP_CONJOINT_SRC";
+    case PIXMAN_OP_CONJOINT_DST: return "PIXMAN_OP_CONJOINT_DST";
+    case PIXMAN_OP_CONJOINT_OVER: return "PIXMAN_OP_CONJOINT_OVER";
+    case PIXMAN_OP_CONJOINT_OVER_REVERSE: return "PIXMAN_OP_CONJOINT_OVER_REVERSE";
+    case PIXMAN_OP_CONJOINT_IN: return "PIXMAN_OP_CONJOINT_IN";
+    case PIXMAN_OP_CONJOINT_IN_REVERSE: return "PIXMAN_OP_CONJOINT_IN_REVERSE";
+    case PIXMAN_OP_CONJOINT_OUT: return "PIXMAN_OP_CONJOINT_OUT";
+    case PIXMAN_OP_CONJOINT_OUT_REVERSE: return "PIXMAN_OP_CONJOINT_OUT_REVERSE";
+    case PIXMAN_OP_CONJOINT_ATOP: return "PIXMAN_OP_CONJOINT_ATOP";
+    case PIXMAN_OP_CONJOINT_ATOP_REVERSE: return "PIXMAN_OP_CONJOINT_ATOP_REVERSE";
+    case PIXMAN_OP_CONJOINT_XOR: return "PIXMAN_OP_CONJOINT_XOR";
+
+    case PIXMAN_OP_MULTIPLY: return "PIXMAN_OP_MULTIPLY";
+    case PIXMAN_OP_SCREEN: return "PIXMAN_OP_SCREEN";
+    case PIXMAN_OP_OVERLAY: return "PIXMAN_OP_OVERLAY";
+    case PIXMAN_OP_DARKEN: return "PIXMAN_OP_DARKEN";
+    case PIXMAN_OP_LIGHTEN: return "PIXMAN_OP_LIGHTEN";
+    case PIXMAN_OP_COLOR_DODGE: return "PIXMAN_OP_COLOR_DODGE";
+    case PIXMAN_OP_COLOR_BURN: return "PIXMAN_OP_COLOR_BURN";
+    case PIXMAN_OP_HARD_LIGHT: return "PIXMAN_OP_HARD_LIGHT";
+    case PIXMAN_OP_SOFT_LIGHT: return "PIXMAN_OP_SOFT_LIGHT";
+    case PIXMAN_OP_DIFFERENCE: return "PIXMAN_OP_DIFFERENCE";
+    case PIXMAN_OP_EXCLUSION: return "PIXMAN_OP_EXCLUSION";
+    case PIXMAN_OP_HSL_HUE: return "PIXMAN_OP_HSL_HUE";
+    case PIXMAN_OP_HSL_SATURATION: return "PIXMAN_OP_HSL_SATURATION";
+    case PIXMAN_OP_HSL_COLOR: return "PIXMAN_OP_HSL_COLOR";
+    case PIXMAN_OP_HSL_LUMINOSITY: return "PIXMAN_OP_HSL_LUMINOSITY";
+
+    case PIXMAN_OP_NONE:
+	return "<invalid operator 'none'>";
+    };
+
+    return "<unknown operator>";
+}
+
 static double
 round_channel (double p, int m)
 {
diff --git a/test/utils.h b/test/utils.h
index 45b457e..e984210 100644
--- a/test/utils.h
+++ b/test/utils.h
@@ -177,6 +177,9 @@ convert_linear_to_srgb (double component);
 void
 initialize_palette (pixman_indexed_t *palette, uint32_t depth, int is_rgb);
 
+const char *
+operator_name (pixman_op_t op);
+
 typedef struct
 {
     double r, g, b, a;