[Piglit] [PATCH] glx-multi-context-single-window: new GLX test

[Brian Paul]

Test rendering into one window with multiple contexts.

Currently fails with llvmpipe, softpipe.  Passes with VMware DRI driver.

v2: we only need to probe with context[0].  Fix comments.
---
 tests/all.py                                |   1 +
 tests/glx/CMakeLists.gl.txt                 |   1 +
 tests/glx/glx-multi-context-single-window.c | 155 ++++++++++++++++++++++++++++
 3 files changed, 157 insertions(+)
 create mode 100644 tests/glx/glx-multi-context-single-window.c

diff --git a/tests/all.py b/tests/all.py
index d4d66b1..6941c65 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -663,6 +663,7 @@ with profile.test_list.group_manager(
     g(['glx-fbo-binding'], run_concurrent=False)
     g(['glx-multi-context-front'], run_concurrent=False)
     g(['glx-multi-context-ib-1'], run_concurrent=False)
+    g(['glx-multi-context-single-window'], run_concurrent=False)
     g(['glx-multithread'], run_concurrent=False)
     g(['glx-multithread-texture'], run_concurrent=False)
     g(['glx-multithread-makecurrent-1'], run_concurrent=False)
diff --git a/tests/glx/CMakeLists.gl.txt b/tests/glx/CMakeLists.gl.txt
index 1e1c684..4ffd74d 100644
--- a/tests/glx/CMakeLists.gl.txt
+++ b/tests/glx/CMakeLists.gl.txt
@@ -32,6 +32,7 @@ IF(PIGLIT_BUILD_GLX_TESTS)
 	piglit_add_executable (glx-dont-care-mask glx-dont-care-mask.c)
 	piglit_add_executable (glx-multi-context-front glx-multi-context-front.c)
 	piglit_add_executable (glx-multi-context-ib-1 glx-multi-context-ib-1.c)
+	piglit_add_executable (glx-multi-context-single-window glx-multi-context-single-window.c)
 	piglit_add_executable (glx-multithread glx-multithread.c)
 	target_link_libraries(glx-multithread pthread)
 	piglit_add_executable (glx-context-flush-control glx-context-flush-control.c)
diff --git a/tests/glx/glx-multi-context-single-window.c b/tests/glx/glx-multi-context-single-window.c
new file mode 100644
index 0000000..726138c
--- /dev/null
+++ b/tests/glx/glx-multi-context-single-window.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright 2017 VMware, Inc.
+ *
+ * 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.
+ */
+
+/** @file glx-multi-context-single-window.c
+ *
+ * Exercise rendering to multiple windows with one context.
+ */
+
+#include <unistd.h>
+#include "piglit-util-gl.h"
+#include "piglit-glx-util.h"
+
+#define MAX_CONTEXTS 8
+
+static GLXContext ctx[MAX_CONTEXTS];
+static int num_contexts = MAX_CONTEXTS;
+static Window win;
+static Display *dpy;
+
+static const float colors[MAX_CONTEXTS][4] = {
+	{1, 0, 0, 1},
+	{0, 1, 0, 1},
+	{0, 0, 1, 1},
+	{0, 1, 1, 1},
+	{1, 0, 1, 1},
+	{1, 1, 0, 1},
+	{1, 1, 1, 1},
+	{.5, .5, .5, 1},
+};
+
+int piglit_width = 500, piglit_height = 500;
+
+static int rect_size = 40;
+
+
+static int
+rect_pos(int i)
+{
+	return i * rect_size / 2;
+}
+
+
+enum piglit_result
+draw(Display *dpy)
+{
+	int i;
+	bool pass = true;
+
+	/* draw a series of colored quads, one per context, at increasing
+	 * Z distance.
+	 */
+	for (i = 0; i < num_contexts; i++) {
+		glXMakeCurrent(dpy, win, ctx[i]);
+
+		if (i == 0) {
+			glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+		}
+
+		glEnable(GL_DEPTH_TEST);
+		glMatrixMode(GL_PROJECTION);
+		glLoadIdentity();
+		glOrtho(0, piglit_width, 0, piglit_height, 0, 1);
+
+		glMatrixMode(GL_MODELVIEW);
+		glLoadIdentity();
+
+		glPushMatrix();
+		float p = rect_pos(i);
+		float z = -i / 10.0;
+		glTranslatef(p, p, z);
+
+		glColor4fv(colors[i]);
+		piglit_draw_rect(0, 0, rect_size, rect_size);
+
+		glPopMatrix();
+	}
+
+	/* probe rendering */
+	glXMakeCurrent(dpy, win, ctx[0]);
+	for (i = 0; i < num_contexts; i++) {
+		int x = rect_pos(i) + rect_size * 3 / 4;
+		int p = piglit_probe_pixel_rgb(x, x, colors[i]);
+
+		if (!p) {
+			printf("Failed probe for rect/context %d\n", i);
+			pass = false;
+		}
+	}
+
+	glXSwapBuffers(dpy, win);
+
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+
+int
+main(int argc, char **argv)
+{
+	XVisualInfo *visinfo;
+	int i;
+
+	for (i = 1; i < argc; ++i) {
+		if (!strcmp(argv[i], "-auto"))
+			piglit_automatic = 1;
+		else
+			fprintf(stderr, "Unknown option: %s\n", argv[i]);
+	}
+
+	dpy = XOpenDisplay(NULL);
+	if (dpy == NULL) {
+		fprintf(stderr, "couldn't open display\n");
+		piglit_report_result(PIGLIT_FAIL);
+	}
+	visinfo = piglit_get_glx_visual(dpy);
+
+	win = piglit_get_glx_window(dpy, visinfo);
+	XMapWindow(dpy, win);
+
+	for (i = 0; i < num_contexts; i++) {
+		ctx[i] = piglit_get_glx_context(dpy, visinfo);
+	}
+
+	glXMakeCurrent(dpy, win, ctx[0]);
+	piglit_dispatch_default_init(PIGLIT_DISPATCH_GL);
+
+	piglit_glx_event_loop(dpy, draw);
+
+	XFree(visinfo);
+	glXDestroyWindow(dpy, win);
+	for (i = 0; i < num_contexts; i++) {
+		glXDestroyContext(dpy, ctx[i]);
+	}
+
+	return 0;
+}
-- 
1.9.1