[Piglit] [PATCH 3/3] glsl-1.10: Add a test for a bad shader not breaking a linked program.

[Eric Anholt]

This was a test I came up with from a description of a failure in the
webgl conformance suite, but which I don't know the actual sequence of
GL calls for.  It passes on Mesa, so it didn't catch what I was hoping
for.  I don't see previous coverage of this in piglit, though.
---
 tests/spec/glsl-1.10/execution/CMakeLists.txt      |    1 +
 .../execution/glsl-render-after-bad-attach.c       |  107 ++++++++++++++++++++
 2 files changed, 108 insertions(+)
 create mode 100644 tests/spec/glsl-1.10/execution/glsl-render-after-bad-attach.c

diff --git a/tests/spec/glsl-1.10/execution/CMakeLists.txt b/tests/spec/glsl-1.10/execution/CMakeLists.txt
index 611a57e..a768d27 100644
--- a/tests/spec/glsl-1.10/execution/CMakeLists.txt
+++ b/tests/spec/glsl-1.10/execution/CMakeLists.txt
@@ -1 +1,2 @@
+piglit_include_target_api()
 add_subdirectory (clipping)
diff --git a/tests/spec/glsl-1.10/execution/glsl-render-after-bad-attach.c b/tests/spec/glsl-1.10/execution/glsl-render-after-bad-attach.c
new file mode 100644
index 0000000..b77096f
--- /dev/null
+++ b/tests/spec/glsl-1.10/execution/glsl-render-after-bad-attach.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric at anholt.net>
+ *
+ */
+
+/** @file glsl-render-bad-attach.c
+ *
+ * Tests that rendering with a good program after attaching a bad
+ * shader to it still works.
+ */
+
+#include "piglit-util.h"
+
+int piglit_width = 10, piglit_height = 10;
+int piglit_window_mode = GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE;
+
+const char *vs_source =
+	"void main()\n"
+	"{\n"
+	"	gl_Position = gl_Vertex;\n"
+	"}\n";
+
+const char *good_fs_source =
+	"void main()\n"
+	"{\n"
+	"	gl_FragColor = vec4(0.0, 1.0, 0.0, 0.0);\n"
+	"}\n";
+
+const char *bad_fs_source =
+	"void BAD_FUNC()\n"
+	"{\n"
+	"	BAD;\n"
+	"}\n";
+
+enum piglit_result
+piglit_display(void)
+{
+	bool pass = GL_TRUE;
+	GLint ok;
+	float green[4] = {0, 1, 0, 0};
+	GLuint good_fs, bad_fs, vs, prog;
+
+	glClearColor(0.0, 1.0, 0.0, 0.0);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_source);
+	good_fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER,
+					     good_fs_source);
+	prog = piglit_link_simple_program(vs, good_fs);
+	if (!vs || !good_fs || !prog)
+		piglit_report_result(PIGLIT_FAIL);
+
+	glUseProgram(prog);
+
+	piglit_draw_rect(-1, -1, 1, 2);
+
+	bad_fs = glCreateShader(GL_FRAGMENT_SHADER);
+	glShaderSource(bad_fs, 1, (const GLchar **) &bad_fs_source, NULL);
+	glCompileShader(bad_fs);
+	glGetShaderiv(bad_fs, GL_COMPILE_STATUS, &ok);
+	if (ok)
+		piglit_report_result(PIGLIT_FAIL);
+	glAttachShader(prog, bad_fs);
+
+	piglit_draw_rect(0, -1, 1, 2);
+
+	pass = piglit_probe_rect_rgba(0, 0,
+				      piglit_width, piglit_height,
+				      green);
+
+	piglit_present_results();
+
+	glDeleteShader(good_fs);
+	glDeleteShader(bad_fs);
+	glDeleteShader(vs);
+	glDeleteProgram(prog);
+
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	piglit_require_GLSL();
+}
-- 
1.7.10