This exercises a bug found in Mesa with softpipe, llvmpipe and swrast
---
tests/all.py | 1 +
tests/general/CMakeLists.gl.txt | 1 +
tests/general/line-flat-clip-color.c | 156 ++++++++++++++++++++++++++++++++++
3 files changed, 158 insertions(+)
create mode 100644 tests/general/line-flat-clip-color.c
diff --git a/tests/all.py b/tests/all.py
index 5d6ef9a..d1bd617 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -861,6 +861,7 @@ add_concurrent_test(gl11, 'glinfo')
add_plain_test(gl11, 'hiz')
add_plain_test(gl11, 'infinite-spot-light')
add_plain_test(gl11, 'line-aa-width')
+add_concurrent_test(gl11, 'line-flat-clip-color')
add_plain_test(gl11, 'linestipple')
add_plain_test(gl11, 'longprim')
add_concurrent_test(gl11, 'masked-clear')
diff --git a/tests/general/CMakeLists.gl.txt b/tests/general/CMakeLists.gl.txt
index 1933b13..69ed167 100644
--- a/tests/general/CMakeLists.gl.txt
+++ b/tests/general/CMakeLists.gl.txt
@@ -81,6 +81,7 @@ piglit_add_executable (line-aa-width line-aa-width.c)
IF (UNIX)
target_link_libraries (line-aa-width m)
ENDIF (UNIX)
+piglit_add_executable (line-flat-clip-color line-flat-clip-color.c)
piglit_add_executable (longprim longprim.c)
piglit_add_executable (masked-clear masked-clear.c)
piglit_add_executable (pos-array pos-array.c)
diff --git a/tests/general/line-flat-clip-color.c
b/tests/general/line-flat-clip-color.c
new file mode 100644
index 0000000..4cf37b2
--- /dev/null
+++ b/tests/general/line-flat-clip-color.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright © 2014 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.
+ */
+
+/*
+ * Test flat-shaded clipped line color.
+ * Exercises provoking vertex, line smooth, line width, etc.
+ *
+ * Author: Brian Paul
+ */
+
+
+#include "piglit-util-gl-common.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+ config.supports_gl_compat_version = 10;
+ config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
+PIGLIT_GL_TEST_CONFIG_END
+
+
+/* far left, far right verts */
+static const float verts[2][2] = {
+ { -10.0, 0.0 }, { 10.0, 0.0 }
+};
+
+static const float colors[2][3] = {
+ { 1.0, 0.0, 0.0 }, { 0.0, 1.0, 0.0 }
+};
+
+static const GLuint forward_order[2] = { 0, 1 };
+static const GLuint backward_order[2] = { 1, 0 };
+
+static bool have_pv = false;
+
+
+static bool
+test_one(int order, const float expected[3])
+{
+ bool pass;
+ int dy, y = piglit_height / 2;
+
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ /* draw horizontal line across middle of window */
+ if (order == 0)
+ glDrawElements(GL_LINES, 2, GL_UNSIGNED_INT, forward_order);
+ else
+ glDrawElements(GL_LINES, 2, GL_UNSIGNED_INT, backward_order);
+
+ /* To be resilient in the face of different line rasterization,
+ * try several Y values to find where the line was drawn.
+ */
+ for (dy = -1; dy <= 1; dy++) {
+ GLfloat color[3];
+ glReadPixels(0, y + dy, 1, 1, GL_RGB, GL_FLOAT, color);
+ if (color[0] || color[1] || color[2]) {
+ /* found non-black pixel */
+ /* test all pixels across middle of window */
+ pass = piglit_probe_rect_rgb(0, y + dy, /* x, y */
+ piglit_width, 1, /* w, h */
+ expected);
+ break;
+ }
+ }
+
+ piglit_present_results();
+
+ return pass;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+
+ glEnable(GL_VERTEX_ARRAY);
+ glEnable(GL_COLOR_ARRAY);
+ glVertexPointer(2, GL_FLOAT, 0, verts);
+ glColorPointer(3, GL_FLOAT, 0, colors);
+
+ glShadeModel(GL_FLAT);
+
+ if (piglit_is_extension_supported("GL_ARB_provoking_vertex")) {
+ have_pv = true;
+ }
+ else if (piglit_is_extension_supported("GL_EXT_provoking_vertex")) {
+ have_pv = true;
+ }
+
+ if (have_pv)
+ printf("Have provoking vertex.\n");
+}
+
+
+enum piglit_result
+piglit_display(void)
+{
+ int direction, smooth, pv, width;
+ bool p, pass = true;
+
+ for (pv = 0; pv <= (int) have_pv; pv++) {
+ if (pv == 1)
+ glProvokingVertex(GL_FIRST_VERTEX_CONVENTION_EXT);
+
+ for (width = 1; width <= 5; width += 4) {
+ glLineWidth((float) width);
+
+ for (smooth = 0; smooth <= 1; smooth++) {
+ if (smooth)
+ glEnable(GL_LINE_SMOOTH);
+ else
+ glDisable(GL_LINE_SMOOTH);
+
+ for (direction = 0; direction <= 1;
direction++) {
+ /* Determine which vertex color should
+ * have been used for the line.
+ */
+ int c = !(direction ^ pv);
+
+ p = test_one(direction, colors[c]);
+ if (!p) {
+ printf("failure (pv = %d, dir =
%d,"
+ " smooth = %d, width =
%d)\n",
+ pv, direction, smooth,
width);
+ }
+ pass = pass && p;
+ }
+ }
+ }
+ }
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
--
1.7.10.4
_______________________________________________
Piglit mailing list
[email protected]
http://lists.freedesktop.org/mailman/listinfo/piglit
