---
tests/all.tests | 1 +
tests/general/CMakeLists.gl.txt | 1 +
tests/general/clipflat.c | 528 +++++++++++++++++++++++++++++++++++++++
3 files changed, 530 insertions(+), 0 deletions(-)
create mode 100644 tests/general/clipflat.c
diff --git a/tests/all.tests b/tests/all.tests
index 7053989..71be932 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -477,6 +477,7 @@ add_plain_test(gl11, 'tri-tex-crash')
add_plain_test(gl11, 'vbo-buffer-unmap')
add_plain_test(gl11, 'array-stride')
add_plain_test(gl11, 'clear-accum')
+add_concurrent_test(gl11, 'clipflat')
add_plain_test(gl11, 'copypixels-draw-sync')
add_plain_test(gl11, 'copypixels-sync')
add_plain_test(gl11, 'depthfunc')
diff --git a/tests/general/CMakeLists.gl.txt b/tests/general/CMakeLists.gl.txt
index efaa56e..ec811d8 100644
--- a/tests/general/CMakeLists.gl.txt
+++ b/tests/general/CMakeLists.gl.txt
@@ -22,6 +22,7 @@ piglit_add_executable (bgra-sec-color-pointer
bgra-sec-color-pointer.c)
piglit_add_executable (blendminmax blendminmax.c)
piglit_add_executable (blendsquare blendsquare.c)
piglit_add_executable (clear-varray-2.0 clear-varray-2.0.c)
+piglit_add_executable (clipflat clipflat.c)
piglit_add_executable (copy-pixels copy-pixels.c)
piglit_add_executable (copypixels-sync copypixels-sync.c)
piglit_add_executable (copypixels-draw-sync copypixels-draw-sync.c)
diff --git a/tests/general/clipflat.c b/tests/general/clipflat.c
new file mode 100644
index 0000000..d654772
--- /dev/null
+++ b/tests/general/clipflat.c
@@ -0,0 +1,528 @@
+/*
+ * Copyright © 2013 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 that the correct provoking vertex is used when a tri/quad/polygon
+ * is clipped for glShadeModel(GL_FLAT).
+ *
+ * This is based on the glean clipFlat test.
+ *
+ * Test with glDrawArrays and glBegin/End. Test GL_CCW and GL_CW winding.
+ * Back-face polygon culling is enabled so if the winding order of any
+ * primitive is incorrect, nothing may be drawn.
+ *
+ * XXX We should also test with two-sided lighting.
+ *
+ * If GL_ARB/EXT_provoking_vertex is supported, that feature is tested as well.
+ *
+ * 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
+
+
+/* Note: all correctly rendered tris/quad/polygons will be green.
+ * Any other color indicates that the wrong vertex color was used.
+ */
+
+// GL_TRIANGLES: provoking vertex = last of tri
+static const GLfloat TriVerts[6][5] =
+ {
+ // R G B X Y
+ { 1, 0, 0, -1, -1 },
+ { 0, 0, 1, 1, -1 },
+ { 0, 1, 0, 1, 1 }, // PV
+
+ { 0, 0, 1, 1, 1 },
+ { 1, 0, 0, -1, 1 },
+ { 0, 1, 0, -1, -1 } // PV
+ };
+
+// GL_TRIANGLES: first provoking vertex
+static const GLfloat TriVertsFirstPV[6][5] =
+ {
+ { 0, 1, 0, 1, 1 }, // PV
+ { 1, 0, 0, -1, -1 },
+ { 0, 0, 1, 1, -1 },
+
+ { 0, 1, 0, -1, -1 }, // PV
+ { 0, 0, 1, 1, 1 },
+ { 1, 0, 0, -1, 1 }
+ };
+
+
+// GL_TRIANGLE_STRIP: provoking vertex = last of tri
+static const GLfloat TriStripVerts[6][5] =
+ {
+ { 1, 0, 0, -1, -1 },
+ { 0, 0, 1, 1, -1 },
+ { 0, 1, 0, -1, 0 }, // PV
+ { 0, 1, 0, 1, 0 }, // PV
+ { 0, 1, 0, -1, 1 }, // PV
+ { 0, 1, 0, 1, 1 } // PV
+ };
+
+// GL_TRIANGLE_STRIP: first provoking vertex
+static const GLfloat TriStripVertsFirstPV[6][5] =
+ {
+ { 0, 1, 0, -1, -1 }, // PV
+ { 0, 1, 0, 1, -1 }, // PV
+ { 0, 1, 0, -1, 0 }, // PV
+ { 0, 1, 0, 1, 0 }, // PV
+ { 1, 0, 0, -1, 1 },
+ { 0, 0, 1, 1, 1 }
+ };
+
+
+// GL_TRIANGLE_FAN: provoking vertex = last of tri
+static const GLfloat TriFanVerts[4][5] =
+ {
+ { 1, 0, 0, -1, -1 },
+ { 0, 0, 1, 1, -1 },
+ { 0, 1, 0, 1, 1 }, // PV
+ { 0, 1, 0, -1, 1 } // PV
+ };
+
+// GL_TRIANGLE_FAN: first provoking vertex
+static const GLfloat TriFanVertsFirstPV[4][5] =
+ {
+ { 0, 0, 1, 1, -1 },
+ { 0, 1, 0, 1, 1 }, // PV
+ { 0, 1, 0, -1, 1 }, // PV
+ { 1, 0, 0, -1, -1 }
+ };
+
+
+// GL_QUADS: provoking vertex = last of quad
+static const GLfloat QuadVerts[4][5] =
+ {
+ { 1, 0, 0, -1, -1 },
+ { 0, 0, 1, 1, -1 },
+ { 1, 1, 0, 1, 1 },
+ { 0, 1, 0, -1, 1 } // PV
+ };
+
+// GL_QUADS: first provoking vertex
+static const GLfloat QuadVertsFirstPV[4][5] =
+ {
+ { 0, 1, 0, -1, 1 }, // PV
+ { 1, 0, 0, -1, -1 },
+ { 0, 0, 1, 1, -1 },
+ { 1, 1, 0, 1, 1 }
+ };
+
+
+// GL_QUAD_STRIP: provoking vertex = last of quad
+static const GLfloat QuadStripVerts[6][5] =
+ {
+ { 1, 0, 0, -1, -1 },
+ { 0, 0, 1, 1, -1 },
+ { 1, 1, 0, -1, 0 },
+ { 0, 1, 0, 1, 0 }, // PV
+ { 1, 1, 0, -1, 1 },
+ { 0, 1, 0, 1, 1 } // PV
+ };
+
+// GL_QUAD_STRIP: first provoking vertex
+static const GLfloat QuadStripVertsFirstPV[6][5] =
+ {
+ { 0, 1, 0, -1, -1 }, // PV
+ { 1, 1, 0, 1, -1 },
+ { 0, 1, 0, -1, 0 }, // PV
+ { 1, 0, 0, 1, 0 },
+ { 0, 0, 1, -1, 1 },
+ { 1, 0, 0, 1, 1 }
+ };
+
+
+// GL_POLYGON: provoking vertex = first vertex
+static const GLfloat PolygonVerts[4][5] =
+ {
+ { 0, 1, 0, -1, -1 }, // PV
+ { 1, 0, 0, 1, -1 },
+ { 0, 0, 1, 1, 1 },
+ { 1, 1, 0, -1, 1 }
+ };
+
+
+enum draw_mode {
+ BEGIN_END,
+ DRAW_ARRAYS,
+ DRAW_ELEMENTS,
+ NUM_DRAW_MODES
+};
+
+
+static bool provoking_vertex_first;
+static bool quads_follows_pv_convention;
+static bool testing_first_pv;
+
+
+void
+piglit_init(int argc, char **argv)
+{
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glOrtho(-1.25, 1.25, -1.25, 1.25, -1, 1);
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+
+ glShadeModel(GL_FLAT);
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+
+ glFrontFace(GL_CW);
+ glCullFace(GL_FRONT);
+ glEnable(GL_CULL_FACE);
+
+ if (piglit_is_extension_supported("GL_ARB_provoking_vertex")) {
+ provoking_vertex_first = true;
+ }
+ else if (piglit_is_extension_supported("GL_EXT_provoking_vertex")) {
+ provoking_vertex_first = true;
+ }
+
+ if (provoking_vertex_first) {
+ GLboolean k;
+ glGetBooleanv(GL_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION_EXT,
&k);
+ quads_follows_pv_convention = k;
+ }
+}
+
+
+// Draw with glDrawArrays()
+static void
+drawArrays(GLenum mode, const GLfloat *verts, GLuint count)
+{
+ glColorPointer(3, GL_FLOAT, 5 * sizeof(GLfloat), verts + 0);
+ glVertexPointer(2, GL_FLOAT, 5 * sizeof(GLfloat), verts + 3);
+ glEnableClientState(GL_COLOR_ARRAY);
+ glEnableClientState(GL_VERTEX_ARRAY);
+
+ glDrawArrays(mode, 0, count);
+
+ glDisableClientState(GL_COLOR_ARRAY);
+ glDisableClientState(GL_VERTEX_ARRAY);
+}
+
+
+// Draw with glDrawElements()
+static void
+drawElements(GLenum mode, const GLfloat *verts, GLuint count)
+{
+ static const GLuint elements[6] = { 0, 1, 2, 3, 4, 5 };
+ glColorPointer(3, GL_FLOAT, 5 * sizeof(GLfloat), verts + 0);
+ glVertexPointer(2, GL_FLOAT, 5 * sizeof(GLfloat), verts + 3);
+ glEnableClientState(GL_COLOR_ARRAY);
+ glEnableClientState(GL_VERTEX_ARRAY);
+
+ assert(count <= ARRAY_SIZE(elements));
+
+ glDrawElements(mode, count, GL_UNSIGNED_INT, elements);
+
+ glDisableClientState(GL_COLOR_ARRAY);
+ glDisableClientState(GL_VERTEX_ARRAY);
+}
+
+
+// Draw with glBegin/End()
+static void
+drawBeginEnd(GLenum mode, const GLfloat *verts, GLuint count)
+{
+ GLuint i;
+
+ glBegin(mode);
+ for (i = 0; i < count; i++) {
+ glColor3fv(verts + i * 5);
+ glVertex2fv(verts + i * 5 + 3);
+ }
+ glEnd();
+}
+
+
+// Read pixels and check pixels. All pixels should be green or black.
+// Any other color indicates a failure.
+static bool
+checkResult(GLfloat badColor[3])
+{
+ GLubyte *image;
+ GLuint i, j;
+ bool anyGreen = false;
+
+ image = malloc(piglit_width * piglit_height * 3);
+
+ badColor[0] = badColor[1] = badColor[2] = 0.0f;
+
+ glReadPixels(0, 0, piglit_width, piglit_height,
+ GL_RGB, GL_UNSIGNED_BYTE, image);
+
+ if (!piglit_automatic)
+ piglit_present_results();
+
+ for (i = 0; i < piglit_height; i++) {
+ for (j = 0; j < piglit_width; j++) {
+ GLuint k = (i * piglit_width + j) * 3;
+
+ if (image[k + 0] == 0 &&
+ image[k + 1] == 0 &&
+ image[k + 2] == 0) {
+ // black - OK
+ }
+ else if (image[k + 0] == 0 &&
+ image[k + 1] >= 254 &&
+ image[k + 0] == 0) {
+ // green - OK
+ anyGreen = true;
+ }
+ else {
+ // any other color = failure
+ badColor[0] = image[k + 0] / 255.0;
+ badColor[1] = image[k + 1] / 255.0;
+ badColor[2] = image[k + 2] / 255.0;
+ free(image);
+ return false;
+ }
+ }
+ }
+
+ free(image);
+
+ return anyGreen;
+}
+
+
+static void
+reportFailure(GLenum mode, int drawMode, GLuint facing,
+ GLuint fill,
+ const GLfloat badColor[3], GLfloat x, GLfloat y)
+{
+ const char *m, *d, *f, *p;
+
+ switch (mode) {
+ case GL_TRIANGLES:
+ m = "GL_TRIANGLES";
+ break;
+ case GL_TRIANGLE_STRIP:
+ m = "GL_TRIANGLE_STRIP";
+ break;
+ case GL_TRIANGLE_FAN:
+ m = "GL_TRIANGLE_FAN";
+ break;
+ case GL_QUADS:
+ m = "GL_QUADS";
+ break;
+ case GL_QUAD_STRIP:
+ m = "GL_QUAD_STRIP";
+ break;
+ case GL_POLYGON:
+ m = "GL_POLYGON";
+ break;
+ default:
+ m = "???";
+ }
+
+ switch (drawMode) {
+ case BEGIN_END:
+ d = "glBegin/End";
+ break;
+ case DRAW_ARRAYS:
+ d = "glDrawArrays";
+ break;
+ case DRAW_ELEMENTS:
+ d = "glDrawElements";
+ break;
+ default:
+ assert(0);
+ }
+
+ if (facing == 0)
+ f = "GL_CCW";
+ else
+ f = "GL_CW";
+
+ if (fill == 0)
+ p = "GL_FILL";
+ else
+ p = "GL_LINE";
+
+ printf("clipflat: Failure for %s(%s),"
+ " glFrontFace(%s), glPolygonMode(%s)\n",
+ d, m, f, p);
+ printf("\ttranslation: %f, %f\n", x, y);
+
+ if (testing_first_pv)
+ printf("\tGL_EXT_provoking_vertex test: "
+ "GL_FIRST_VERTEX_CONVENTION_EXT mode\n");
+
+ printf("\tExpected color (0, 1, 0) but found (%g, %g, %g)\n",
+ badColor[0], badColor[1], badColor[2]);
+}
+
+
+// Test a particular primitive mode
+static bool
+testPrim(GLenum mode, const GLfloat *verts, GLuint count)
+{
+ GLfloat x, y;
+ GLuint facing, fill;
+ int drawMode;
+
+ // Loop over polygon mode: filled vs. outline
+ for (fill = 0; fill < 2; fill++) {
+
+ glPolygonMode(GL_FRONT_AND_BACK, fill ? GL_LINE : GL_FILL);
+
+ // Loop over drawing mode: glBegin/End vs glDrawArrays vs
glDrawElements
+ for (drawMode = 0; drawMode < NUM_DRAW_MODES; drawMode++) {
+
+ // Loop over CW vs. CCW winding (should make no
difference)
+ for (facing = 0; facing < 2; facing++) {
+
+ if (facing == 0) {
+ glFrontFace(GL_CCW);
+ glCullFace(GL_BACK);
+ }
+ else {
+ glFrontFace(GL_CW);
+ glCullFace(GL_FRONT);
+ }
+
+ // Position the geometry at 9 different
locations to test
+ // clipping against the left, right, bottom and
top edges of
+ // the window.
+ // Only the center location will be unclipped.
+ for (y = -1.0; y <= 1.0; y += 1.0) {
+ for (x = -1.0; x <= 1.0; x += 1.0) {
+ GLfloat badColor[3];
+
+ glPushMatrix();
+ glTranslatef(x, y, 0.0);
+
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ switch (drawMode) {
+ case BEGIN_END:
+ drawBeginEnd(mode,
verts, count);
+ break;
+ case DRAW_ARRAYS:
+ drawArrays(mode, verts,
count);
+ break;
+ case DRAW_ELEMENTS:
+ drawElements(mode,
verts, count);
+ break;
+ default:
+ assert(0);
+ }
+
+ glPopMatrix();
+
+ if (!checkResult(badColor)) {
+ reportFailure(mode,
drawMode, facing, fill, badColor, x, y);
+ return false;
+ }
+ }
+ }
+ }
+ }
+ }
+ return true;
+}
+
+
+enum piglit_result
+piglit_display(void)
+{
+ bool pass = true;
+
+ testing_first_pv = false;
+
+ pass = testPrim(GL_TRIANGLES,
+ (GLfloat *) TriVerts,
+ ARRAY_SIZE(TriVerts)) && pass;
+
+ pass = testPrim(GL_TRIANGLE_STRIP,
+ (GLfloat *) TriStripVerts,
+ ARRAY_SIZE(TriStripVerts)) && pass;
+
+ pass = testPrim(GL_TRIANGLE_FAN,
+ (GLfloat *) TriFanVerts,
+ ARRAY_SIZE(TriFanVerts)) && pass;
+
+ pass = testPrim(GL_QUADS,
+ (GLfloat *) QuadVerts,
+ ARRAY_SIZE(QuadVerts)) && pass;
+
+ pass = testPrim(GL_QUAD_STRIP,
+ (GLfloat *) QuadStripVerts,
+ ARRAY_SIZE(QuadStripVerts)) && pass;
+
+ pass = testPrim(GL_POLYGON,
+ (GLfloat *) PolygonVerts,
+ ARRAY_SIZE(PolygonVerts)) && pass;
+
+ if (provoking_vertex_first) {
+ glProvokingVertex(GL_FIRST_VERTEX_CONVENTION_EXT);
+ testing_first_pv = true;
+
+ pass = testPrim(GL_TRIANGLES,
+ (GLfloat *) TriVertsFirstPV,
+ ARRAY_SIZE(TriVertsFirstPV)) && pass;
+
+ pass = testPrim(GL_TRIANGLE_STRIP,
+ (GLfloat *) TriStripVertsFirstPV,
+ ARRAY_SIZE(TriStripVertsFirstPV)) && pass;
+
+ pass = testPrim(GL_TRIANGLE_FAN,
+ (GLfloat *) TriFanVertsFirstPV,
+ ARRAY_SIZE(TriFanVertsFirstPV)) && pass;
+
+ if (quads_follows_pv_convention)
+ pass = testPrim(GL_QUADS,
+ (GLfloat *) QuadVertsFirstPV,
+ ARRAY_SIZE(QuadVertsFirstPV)) && pass;
+ else
+ pass = testPrim(GL_QUADS,
+ (GLfloat *) QuadVerts,
+ ARRAY_SIZE(QuadVerts)) && pass;
+
+ if (quads_follows_pv_convention)
+ pass = testPrim(GL_QUAD_STRIP,
+ (GLfloat *) QuadStripVertsFirstPV,
+ ARRAY_SIZE(QuadStripVertsFirstPV)) &&
pass;
+ else
+ pass = testPrim(GL_QUAD_STRIP,
+ (GLfloat *) QuadStripVerts,
+ ARRAY_SIZE(QuadStripVerts)) && pass;
+
+ pass = testPrim(GL_POLYGON,
+ (GLfloat *) PolygonVerts,
+ ARRAY_SIZE(PolygonVerts)) && pass;
+ }
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
--
1.7.3.4
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