[Piglit] [PATCH] ARB_vertex_attrib_64bit: add doubles support to attributes test

[Timothy Arceri]

---
 tests/general/attribs.c | 68 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 65 insertions(+), 3 deletions(-)

diff --git a/tests/general/attribs.c b/tests/general/attribs.c
index 05a0d4a1e..bf627dece 100644
--- a/tests/general/attribs.c
+++ b/tests/general/attribs.c
@@ -53,6 +53,7 @@ enum {
 };
 
 enum {
+	DOUBLE_TYPE,
 	FLOAT_TYPE,
 	INT_TYPE,
 	UINT_TYPE
@@ -120,12 +121,13 @@ static GLboolean test(int x, int y, const char *shaderfunc,
 		      const char *info)
 {
 	static const char *templ = {
+		"%s \n"
 		"%s \n"
 		"#extension GL_ARB_explicit_attrib_location : require \n"
 		"layout(location = 1) in %s attr; \n"
 		"void main() { \n"
 		"  gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; \n"
-		"  gl_FrontColor = (%s) * vec4(1.0, 1.0, 1.0, 0.5); \n"
+		"  gl_FrontColor = vec4(%s %s) * vec4(1.0, 1.0, 1.0, 0.5); \n"
 		"} \n"
 	};
 	GLuint prog, vs;
@@ -139,10 +141,56 @@ static GLboolean test(int x, int y, const char *shaderfunc,
 		{0.5, 0.3, 0.9, 0.2}
 	};
 
+	char *defaults;
+	char *type_string;
+
+	/* From Section 11.1.1 (Vertex Attributes) of the OpenGL 4.6
+	 * Compatibility Profile spec:
+	 *
+	 *    "Scalar and vector vertex attribute types and VertexAttrib*
+	 *    commands used to set the values of the corresponding generic
+	 *    attribute. values are provided if the values of the vertex
+	 *    attribute variable are specified with fewer components than
+	 *    required for the attribute variable. For example, the fourth
+	 *    component of a variable of type dvec4 will be undefined if
+	 *    specified using VertexAttribL3dv, or using a vertex array
+	 *    specified with VertexAttribLPointer and a size of three.
+	 *
+	 * TODO: We should probably also be doing this for attribute functions
+	 *       other than doubles.
+	 */
+	if (type == DOUBLE_TYPE) {
+		switch (mask) {
+		case R:
+			type_string = "double";
+			defaults = ", dvec3(0.0, 0.0, 1.0)";
+			break;
+		case RG:
+			type_string = "dvec2";
+			defaults = ", dvec2(0.0, 1.0)";
+			break;
+		case RGB:
+			type_string = "dvec3";
+			defaults = ", 1.0";
+			break;
+		case RGBA:
+			type_string = "dvec4";
+			defaults = "";
+			break;
+		default:
+			assert(0);
+		}
+	} else {
+		defaults = "";
+		type_string =
+			type == INT_TYPE ? "ivec4" : type == UINT_TYPE ? "uvec4" : "vec4";
+	}
+
 	sprintf(vstext, templ,
 		type != FLOAT_TYPE ? "#version 130" : "",
-		type == INT_TYPE ? "ivec4" : type == UINT_TYPE ? "uvec4" : "vec4",
-		shaderfunc);
+		type == DOUBLE_TYPE ?
+		"#extension GL_ARB_gpu_shader_fp64: enable\n#extension GL_ARB_vertex_attrib_64bit: enable" : "",
+		type_string, shaderfunc, defaults);
 
 	/* Create the shader. */
 	vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vstext);
@@ -343,6 +391,19 @@ static test_func tests_GL3[] = {
 	test_glVertexAttribI4ui,
 };
 
+/* ARB_vertex_attrib_64bit */
+DEFINE_TEST(glVertexAttribL1d,,  (1, x),		"attr", R, DOUBLE_TYPE, "")
+DEFINE_TEST(glVertexAttribL2d,,  (1, x, y),		"attr", RG, DOUBLE_TYPE, "")
+DEFINE_TEST(glVertexAttribL3d,,  (1, x, y, z),		"attr", RGB, DOUBLE_TYPE, "")
+DEFINE_TEST(glVertexAttribL4d,,  (1, x, y, z, w),	"attr", RGBA, DOUBLE_TYPE, "")
+
+static test_func tests_GL_ARB_vertex_attrib_64bit[] = {
+	test_glVertexAttribL1d,
+	test_glVertexAttribL2d,
+	test_glVertexAttribL3d,
+	test_glVertexAttribL4d,
+};
+
 /* ARB_vertex_type_2_10_10_10_rev */
 /* Packing functions for a signed normalized 2-bit component.
  * These are based on equation 2.2 and 2.3 from the opengl specification, see:
@@ -503,6 +564,7 @@ struct test_set {
 } test_sets[] = {
 	{ TESTS(GL2) },
 	{ TESTS(GL3), 30 },
+	{ TESTS(GL_ARB_vertex_attrib_64bit), 32 },
 	{ TESTS(GL_ARB_vertex_type_2_10_10_10_rev), 0, "GL_ARB_vertex_type_2_10_10_10_rev" },
 };
 
-- 
2.17.1