diff options
| -rw-r--r-- | tests/all.py | 1 | ||||
| -rw-r--r-- | tests/spec/gl-2.0/CMakeLists.gl.txt | 1 | ||||
| -rw-r--r-- | tests/spec/gl-2.0/two-sided-stencil.c | 751 |
3 files changed, 753 insertions, 0 deletions
diff --git a/tests/all.py b/tests/all.py index 0db54ac72..8c291b8c5 100644 --- a/tests/all.py +++ b/tests/all.py @@ -1069,6 +1069,7 @@ with profile.group_manager( g(['gl-2.0-edgeflag']) g(['gl-2.0-edgeflag-immediate']) g(['gl-2.0-large-point-fs']) + g(['gl-2.0-two-sided-stencil']) g(['gl-2.0-vertexattribpointer']) g(['gl-2.0-vertex-const-attr']) g(['gl-2.0-reuse_fragment_shader']) diff --git a/tests/spec/gl-2.0/CMakeLists.gl.txt b/tests/spec/gl-2.0/CMakeLists.gl.txt index e10940b3b..20b315a5e 100644 --- a/tests/spec/gl-2.0/CMakeLists.gl.txt +++ b/tests/spec/gl-2.0/CMakeLists.gl.txt @@ -13,6 +13,7 @@ piglit_add_executable (vertex-program-two-side vertex-program-two-side.c) piglit_add_executable (gl-2.0-edgeflag edgeflag.c) piglit_add_executable (gl-2.0-edgeflag-immediate edgeflag-immediate.c) piglit_add_executable (gl-2.0-large-point-fs large-point-fs.c) +piglit_add_executable (gl-2.0-two-sided-stencil two-sided-stencil.c) piglit_add_executable (gl-2.0-vertexattribpointer vertexattribpointer.c) piglit_add_executable (gl-2.0-vertex-const-attr vertex-const-attr.c) piglit_add_executable (gl-2.0-reuse_fragment_shader reuse_fragment_shader.c) diff --git a/tests/spec/gl-2.0/two-sided-stencil.c b/tests/spec/gl-2.0/two-sided-stencil.c new file mode 100644 index 000000000..2ae101970 --- /dev/null +++ b/tests/spec/gl-2.0/two-sided-stencil.c @@ -0,0 +1,751 @@ +/* + * BEGIN_COPYRIGHT -*- glean -*- + * + * Copyright (C) 1999 Allen Akin All Rights Reserved. + * Copyright (C) 2009 VMware, Inc. All Rights Reserved. + * Copyright (C) 2015 Intel Corporation All Rights Reserved. + * + * 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. + * + * END_COPYRIGHT + */ + +/** @file two-sided-stencil.c + * + * Test two-sided stencil extensions + * + * This test could be better: + * 1. Generate random state vectors, render and compare to expected values + * 2. Exercise separate front/back reference values and masks for the + * EXT and GL2 variations. + * + * Note: Must check writeMask of set_stencil_state to make sure it's correct + * + * Authors: + * Brian Paul <brianp@valinux.com> + * Adapted to Piglit by Juliet Fru <julietfru@gmail.com>, September 2015. + */ + +#include "piglit-util-gl.h" + +#include <assert.h> +#include <string.h> + + +PIGLIT_GL_TEST_CONFIG_BEGIN config.supports_gl_compat_version = 20; + +config.window_visual = + PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DEPTH | + PIGLIT_GL_VISUAL_STENCIL; + +PIGLIT_GL_TEST_CONFIG_END + +/* two-sided methods. */ +#define ATI 1 +#define EXT 2 +#define GL2 3 + +GLint stencil_bits, stencil_max; + + +static bool +have_stencil_wrap(void) +{ + if (piglit_get_gl_version() >= 2.0) { + return true; + } else if (piglit_is_extension_supported("GL_EXT_stencil_wrap")) { + return true; + } + return false; +} + + +/* Draw four quads: + * Bottom row uses GL_CCW + * Top row uses GL_CW + * Left column is front-facing + * Right column is back-facing + * Check the values in the stencil buffer to see if they match + * the expected values. + */ +static bool +render_test(GLuint expectedFront, GLuint expectedBack) +{ + GLint x0 = 0; + GLint x1 = piglit_width / 2; + GLint x2 = piglit_width; + GLint y0 = 0; + GLint y1 = piglit_width / 2; + GLint y2 = piglit_width; + + glFrontFace(GL_CCW); /* this the GL default */ + + /* lower left quad = front-facing */ + glBegin(GL_TRIANGLE_FAN); + glVertex2f(x0, y0); + glVertex2f(x1, y0); + glVertex2f(x1, y1); + glVertex2f(x0, y1); + glEnd(); + + /* lower right quad = back-facing */ + glBegin(GL_TRIANGLE_FAN); + glVertex2f(x1, y0); + glVertex2f(x1, y1); + glVertex2f(x2, y1); + glVertex2f(x2, y0); + glEnd(); + + glFrontFace(GL_CW); + + /* upper left quad = front-facing */ + glBegin(GL_TRIANGLE_FAN); + glVertex2f(x0, y1); + glVertex2f(x0, y2); + glVertex2f(x1, y2); + glVertex2f(x1, y1); + glEnd(); + + /* upper right quad = back-facing */ + glBegin(GL_TRIANGLE_FAN); + glVertex2f(x1, y1); + glVertex2f(x2, y1); + glVertex2f(x2, y2); + glVertex2f(x1, y2); + glEnd(); + + GLint midXleft = (x0 + x1) / 2; + GLint midXright = (x1 + x2) / 2; + GLint midYlower = (y0 + y1) / 2; + GLint midYupper = (y1 + y2) / 2; + GLuint lowerLeftVal, lowerRightVal; + GLuint upperLeftVal, upperRightVal; + + glReadPixels(midXleft, midYlower, 1, 1, + GL_STENCIL_INDEX, GL_UNSIGNED_INT, &lowerLeftVal); + glReadPixels(midXright, midYlower, 1, 1, + GL_STENCIL_INDEX, GL_UNSIGNED_INT, &lowerRightVal); + + glReadPixels(midXleft, midYupper, 1, 1, + GL_STENCIL_INDEX, GL_UNSIGNED_INT, &upperLeftVal); + glReadPixels(midXright, midYupper, 1, 1, + GL_STENCIL_INDEX, GL_UNSIGNED_INT, &upperRightVal); + + if (lowerLeftVal != upperLeftVal) { + printf(" FAIL:\n" + "\tLower-left value (%d) doesn't match upper-left " + "value (%d).\n \t Looks like a front/back " + "orientation bug.\n", lowerLeftVal, upperLeftVal); + return false; + } + + if (lowerRightVal != upperRightVal) { + printf(" FAIL:\n\tLower-right value (%d) doesn't match" + " upper-right value (%d).\n\tLooks like " + "a front/back-face orientation bug.\n", lowerRightVal, + upperRightVal); + return false; + } + + + if (lowerLeftVal != expectedFront) { + printf("FAIL:\n\tExpected front-face stencil value is " + "%d but found %d \n", expectedFront, lowerLeftVal); + return false; + } else if (lowerRightVal != expectedBack) { + printf("FAIL:\n\tExpected back-face stencil value is " + "%d but found %d \n", expectedBack, lowerRightVal); + return false; + } else { + return true; + } +} + + +static bool +compare_state(int method, GLenum found, GLenum expected, const char *msg) +{ + if (found != expected) { + printf(" FAIL:\n\tQuery of %s state failed for ", msg); + switch (method) { + case ATI: + printf("GL_ATI_separate_stencil\n"); + break; + case EXT: + printf("GL_EXT_stencil_two_side\n"); + break; + case GL2: + printf("GL 2.x two-sided stencil\n"); + break; + default: + printf("\n"); + assert(0); + } + + printf("\tFound 0x%x, expected 0x%x\n", found, expected); + return false; + } + return true; +} + + +/* Set stencil state, plus read it back and check that it's correct. + * Note: we only test with one reference value and one mask value + * even though EXT and GL2 support separate front/back refs/masks + */ +static bool +set_stencil_state(int method, + GLenum frontStencilFail, + GLenum backStencilFail, + GLenum frontZFail, + GLenum backZFail, + GLenum frontZPass, + GLenum backZPass, + GLenum frontFunc, + GLenum backFunc, + GLint frontRef, + GLint backRef, + GLuint frontMask, + GLuint backMask, + GLuint frontWriteMask, GLuint backWriteMask) +{ + GLint get_frontStencilFail; + GLint get_backStencilFail; + GLint get_frontZFail; + GLint get_backZFail; + GLint get_frontZPass; + GLint get_backZPass; + GLint get_frontFunc; + GLint get_backFunc; + GLint get_frontRef; + GLint get_backRef; + GLint get_frontMask; + GLint get_backMask; + GLint get_frontWriteMask; + GLint get_backWriteMask; + GLint twoEnabled; + + switch (method) { + case ATI: + assert(frontRef == backRef); + assert(frontMask == backMask); + assert(frontWriteMask == backWriteMask); + + /* set state */ + glStencilOpSeparateATI(GL_FRONT, + frontStencilFail, + frontZFail, frontZPass); + + glStencilOpSeparateATI(GL_BACK, + backStencilFail, backZFail, backZPass); + + glStencilFuncSeparateATI(frontFunc, backFunc, frontRef, + frontMask); + + glStencilMask(frontWriteMask); + + /* get state */ + glGetIntegerv(GL_STENCIL_FAIL, &get_frontStencilFail); + glGetIntegerv(GL_STENCIL_PASS_DEPTH_FAIL, &get_frontZFail); + glGetIntegerv(GL_STENCIL_PASS_DEPTH_PASS, &get_frontZPass); + glGetIntegerv(GL_STENCIL_FUNC, &get_frontFunc); + glGetIntegerv(GL_STENCIL_REF, &get_frontRef); + glGetIntegerv(GL_STENCIL_VALUE_MASK, &get_frontMask); + glGetIntegerv(GL_STENCIL_WRITEMASK, &get_frontWriteMask); + + glGetIntegerv(GL_STENCIL_BACK_FUNC_ATI, &get_backFunc); + glGetIntegerv(GL_STENCIL_BACK_FAIL_ATI, &get_backStencilFail); + glGetIntegerv(GL_STENCIL_BACK_PASS_DEPTH_FAIL_ATI, + &get_backZFail); + glGetIntegerv(GL_STENCIL_BACK_PASS_DEPTH_PASS_ATI, + &get_backZPass); + get_backRef = get_frontRef; + get_backMask = get_frontMask; + get_backWriteMask = get_frontWriteMask; + twoEnabled = GL_TRUE; + break; + + case EXT: + /* set state */ + glEnable(GL_STENCIL_TEST_TWO_SIDE_EXT); + + glActiveStencilFaceEXT(GL_FRONT); + glStencilOp(frontStencilFail, frontZFail, frontZPass); + glStencilFunc(frontFunc, frontRef, frontMask); + glStencilMask(frontWriteMask); + + glActiveStencilFaceEXT(GL_BACK); + glStencilOp(backStencilFail, backZFail, backZPass); + glStencilFunc(backFunc, backRef, backMask); + glStencilMask(backWriteMask); + + /* get state */ + glActiveStencilFaceEXT(GL_FRONT); + glGetIntegerv(GL_STENCIL_FAIL, &get_frontStencilFail); + glGetIntegerv(GL_STENCIL_PASS_DEPTH_FAIL, &get_frontZFail); + glGetIntegerv(GL_STENCIL_PASS_DEPTH_PASS, &get_frontZPass); + glGetIntegerv(GL_STENCIL_FUNC, &get_frontFunc); + glGetIntegerv(GL_STENCIL_REF, &get_frontRef); + glGetIntegerv(GL_STENCIL_VALUE_MASK, &get_frontMask); + glGetIntegerv(GL_STENCIL_WRITEMASK, &get_frontWriteMask); + glActiveStencilFaceEXT(GL_BACK); + glGetIntegerv(GL_STENCIL_FAIL, &get_backStencilFail); + glGetIntegerv(GL_STENCIL_PASS_DEPTH_FAIL, &get_backZFail); + glGetIntegerv(GL_STENCIL_PASS_DEPTH_PASS, &get_backZPass); + glGetIntegerv(GL_STENCIL_FUNC, &get_backFunc); + glGetIntegerv(GL_STENCIL_REF, &get_backRef); + glGetIntegerv(GL_STENCIL_VALUE_MASK, &get_backMask); + glGetIntegerv(GL_STENCIL_WRITEMASK, &get_backWriteMask); + glGetIntegerv(GL_STENCIL_TEST_TWO_SIDE_EXT, &twoEnabled); + break; + + case GL2: + /* set state */ + glStencilOpSeparate(GL_FRONT, + frontStencilFail, frontZFail, frontZPass); + glStencilOpSeparate(GL_BACK, + backStencilFail, backZFail, backZPass); + glStencilFuncSeparate(GL_FRONT, frontFunc, frontRef, + frontMask); + glStencilFuncSeparate(GL_BACK, backFunc, backRef, backMask); + glStencilMaskSeparate(GL_FRONT, frontWriteMask); + glStencilMaskSeparate(GL_BACK, backWriteMask); + + /* get state */ + glGetIntegerv(GL_STENCIL_FAIL, &get_frontStencilFail); + glGetIntegerv(GL_STENCIL_PASS_DEPTH_FAIL, &get_frontZFail); + glGetIntegerv(GL_STENCIL_PASS_DEPTH_PASS, &get_frontZPass); + glGetIntegerv(GL_STENCIL_FUNC, &get_frontFunc); + glGetIntegerv(GL_STENCIL_REF, &get_frontRef); + glGetIntegerv(GL_STENCIL_VALUE_MASK, &get_frontMask); + glGetIntegerv(GL_STENCIL_WRITEMASK, &get_frontWriteMask); + + glGetIntegerv(GL_STENCIL_BACK_FUNC, &get_backFunc); + glGetIntegerv(GL_STENCIL_BACK_FAIL, &get_backStencilFail); + glGetIntegerv(GL_STENCIL_BACK_PASS_DEPTH_FAIL, + &get_backZFail); + glGetIntegerv(GL_STENCIL_BACK_PASS_DEPTH_PASS, + &get_backZPass); + glGetIntegerv(GL_STENCIL_BACK_REF, &get_backRef); + glGetIntegerv(GL_STENCIL_BACK_VALUE_MASK, &get_backMask); + glGetIntegerv(GL_STENCIL_BACK_WRITEMASK, &get_backWriteMask); + twoEnabled = GL_TRUE; + break; + + default: + assert(0); + } + + /* mask off bits we don't care about */ + get_frontMask &= stencil_max; + frontMask &= stencil_max; + get_backMask &= stencil_max; + backMask &= stencil_max; + get_frontWriteMask &= stencil_max; + frontWriteMask &= stencil_max; + get_backWriteMask &= stencil_max; + backWriteMask &= stencil_max; + + + if (!piglit_check_gl_error(GL_NO_ERROR)) { + return false; + } + + /* see if state-get matches state-set */ + + if (!compare_state(method, get_frontStencilFail, frontStencilFail, + "front stencil fail")) + return false; + + if (!compare_state(method, get_backStencilFail, backStencilFail, + "back stencil fail")) + return false; + + if (!compare_state(method, get_frontZFail, frontZFail, + "front Z fail")) + return false; + + if (!compare_state(method, get_backZFail, backZFail, "back Z fail")) + return false; + + if (!compare_state(method, get_frontZPass, frontZPass, + "front Z pass")) + return false; + + if (!compare_state(method, get_backZPass, backZPass, "back Z pass")) + return false; + + if (!compare_state(method, get_frontFunc, frontFunc, + "front stencil func")) + return false; + + if (!compare_state(method, get_backFunc, backFunc, + "back stencil func")) + return false; + + if (!compare_state(method, get_frontRef, frontRef, + "front stencil ref")) + return false; + + if (!compare_state(method, get_backRef, backRef, "back stencil ref")) + return false; + + if (!compare_state(method, get_frontMask, frontMask, + "front stencil mask")) + return false; + + if (!compare_state(method, get_backMask, backMask, + "back stencil mask")) + return false; + + if (!compare_state(method, get_frontWriteMask, frontWriteMask, + "front stencil writemask")) + return false; + + if (!compare_state(method, get_backWriteMask, backWriteMask, + "back stencil writemask")) + return false; + + if (!compare_state(method, twoEnabled, GL_TRUE, "two-side enable")) + return false; + + return true; +} + + +static bool +set_stencil_state2(int method, + GLenum frontStencilFail, + GLenum backStencilFail, + GLenum frontZFail, + GLenum backZFail, + GLenum frontZPass, + GLenum backZPass, + GLenum frontFunc, + GLenum backFunc, + GLint ref, + GLuint mask, + GLuint writeMask) +{ + return set_stencil_state(method, frontStencilFail, + backStencilFail, frontZFail, backZFail, + frontZPass, backZPass, frontFunc, backFunc, + ref, /* frontRef */ + ref, /* backRef */ + mask, /* frontMask */ + mask, /* backMask */ + writeMask, /* frontWriteMask */ + writeMask); /* backWriteMask */ +} + + +void +reset_stencil_state(int method) +{ + switch (method) { + case ATI: + break; + case EXT: + glDisable(GL_STENCIL_TEST_TWO_SIDE_EXT); + glActiveStencilFaceEXT(GL_FRONT); + break; + case GL2: + break; + default: + assert(0); + } +} + + +static bool +test_stencil(int method) +{ + bool pass; + + glEnable(GL_STENCIL_TEST); + + /** + * No depth testing + */ + glDisable(GL_DEPTH_TEST); + + glClear(GL_COLOR_BUFFER_BIT | + GL_STENCIL_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + + /* set stencil buffer vals to 5 */ + pass = set_stencil_state2(method, GL_KEEP, GL_KEEP, /* stencil fail */ + GL_KEEP, GL_KEEP, /* z fail */ + GL_REPLACE, GL_REPLACE, /* z pass */ + GL_ALWAYS, GL_ALWAYS, /* stencil func */ + 5, ~0, ~0); /* ref, mask, set write_mask to ~0 */ + if (pass) + pass = render_test(5, 5); + reset_stencil_state(method); + if (!pass) + return false; + + /* incr front val to 6, decr back val to 4 */ + pass = set_stencil_state2(method, GL_KEEP, GL_KEEP, /* stencil fail */ + GL_KEEP, GL_KEEP, /* z fail */ + GL_INCR, GL_DECR, /* z pass */ + GL_ALWAYS, GL_ALWAYS, /* stencil func */ + 5, ~0, ~0); /* ref, mask, set write_mask to ~0 */ + if (pass) + pass = render_test(6, 4); + reset_stencil_state(method); + if (!pass) + return false; + + /* if front==6, keep + * if back<6, replace with zero + * final: front=6, back=0 + */ + pass = set_stencil_state2(method, GL_KEEP, GL_ZERO, /* stencil fail */ + GL_KEEP, GL_KEEP, /* z fail */ + GL_KEEP, GL_KEEP, /* z pass */ + GL_EQUAL, GL_LESS, /* stencil func */ + 6, ~0, ~0); /* ref, mask, set write_mask to ~0 */ + if (pass) + pass = render_test(6, 0); + reset_stencil_state(method); + if (!pass) + return false; + + /* if front!=10, keep, else decr + * if back<10, keep, else incr + * final: front=6, back=1 + */ + pass = set_stencil_state2(method, GL_DECR, GL_INCR, /* stencil fail */ + GL_KEEP, GL_KEEP, /* z fail */ + GL_KEEP, GL_KEEP, /* z pass */ + GL_NOTEQUAL, GL_LESS, /* stencil func */ + 10, ~0, ~0); /* ref, mask, set write_mask to ~0 */ + if (pass) + pass = render_test(6, 1); + reset_stencil_state(method); + if (!pass) + return false; + + if (method != ATI) { + /* if front!=10, keep, else decr + * if back<10, keep, else incr + * final: front=6, back=1 + */ + pass = set_stencil_state(method, GL_DECR, GL_INCR, /* stencil fail */ + GL_KEEP, GL_KEEP, /* z fail */ + GL_REPLACE, GL_REPLACE, /* z pass */ + GL_ALWAYS, GL_ALWAYS, /* stencil func */ + 0xf6, 0xf1, /* ref */ + 0xff, 0xff, /* mask */ + 0x60, 0x10); /* writeMask */ + if (pass) + pass = render_test(0x66, 0x11); + reset_stencil_state(method); + if (!pass) + return false; + } + + /* reset write mask for clear */ + set_stencil_state(method, GL_KEEP, GL_KEEP, /* stencil fail */ + GL_KEEP, GL_KEEP, /* z fail */ + GL_REPLACE, GL_REPLACE, /* z pass */ + GL_ALWAYS, GL_ALWAYS, /* stencil func */ + 0, 0, ~0, ~0, ~0, ~0); + + /* ============================================================ + * Now begin tests with depth test + */ + glEnable(GL_DEPTH_TEST); + glDepthFunc(GL_LESS); + + glClear(GL_COLOR_BUFFER_BIT | + GL_STENCIL_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + /* set stencil buffer vals to 7, set Z values */ + pass = set_stencil_state2(method, GL_KEEP, GL_KEEP, /* stencil fail */ + GL_KEEP, GL_KEEP, /* z fail */ + GL_REPLACE, GL_REPLACE, /* z pass */ + GL_ALWAYS, GL_ALWAYS, /* stencil func */ + 7, ~0, ~0); /* ref, mask, set write_mask to ~0 */ + if (pass) + pass = render_test(7, 7); + reset_stencil_state(method); + if (!pass) + return false; + + + /* GL_LESS test should fail everywhere + * decr front to 5, incr back to 2 + */ + pass = set_stencil_state2(method, GL_KEEP, GL_KEEP, /* stencil fail */ + GL_DECR, GL_INCR, /* z fail */ + GL_KEEP, GL_KEEP, /* z pass */ + GL_ALWAYS, GL_ALWAYS, /* stencil func */ + 99, ~0, ~0); /* ref, mask, set write_mask to ~0 */ + if (pass) + pass = render_test(6, 8); + reset_stencil_state(method); + if (!pass) + return false; + + + /* set depth test = GL_EQUAL + * Z test should pass everywhere + * set front to 3 + * decr back to 7 + */ + glDepthFunc(GL_EQUAL); + pass = set_stencil_state2(method, GL_KEEP, GL_KEEP, /* stencil fail */ + GL_KEEP, GL_KEEP, /* z fail */ + GL_REPLACE, GL_DECR, /* z pass */ + GL_ALWAYS, GL_ALWAYS, /* stencil func */ + 3, ~0, ~0); /* ref, mask, set write_mask to ~0 */ + if (pass) + pass = render_test(3, 7); + reset_stencil_state(method); + if (!pass) + return false; + + + /* incr front to 4 (by z pass), decr back to 6 (by stencil fail) */ + pass = set_stencil_state2(method, GL_DECR, GL_DECR, /* stencil fail */ + GL_KEEP, GL_KEEP, /* z fail */ + GL_INCR, GL_REPLACE, /* z pass */ + GL_EQUAL, GL_EQUAL, /* stencil func */ + 3, ~0, ~0); /* ref, mask, set write_mask to ~0 */ + if (pass) + pass = render_test(4, 6); + reset_stencil_state(method); + if (!pass) + return false; + + + /* ============================================================ + * Disable depth test + */ + glDisable(GL_DEPTH_TEST); + + /* test stencil value mask + * only test bit 1 in stencil values + * if !(front&0x2 == 15&0x2), decr to 3 (should happen) + * if !(back&0x2 == 15&0x2), incr to 7 (should not happen) + */ + pass = set_stencil_state2(method, GL_DECR, GL_INCR, /* stencil fail */ + GL_KEEP, GL_KEEP, /* z fail */ + GL_KEEP, GL_KEEP, /* z pass */ + GL_EQUAL, GL_EQUAL, /* stencil func */ + 15, 0x2, ~0); /* ref, mask, set write_mask to ~0 */ + if (pass) + pass = render_test(3, 6); + reset_stencil_state(method); + if (!pass) + return false; + + /* ============================================================ + * Test common two-sided stencil modes for shadow volume rendering + * Requires stencil /- wrap feature. + */ + + if (!have_stencil_wrap()) + return true; + + glClear(GL_COLOR_BUFFER_BIT | + GL_STENCIL_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + glEnable(GL_DEPTH_TEST); + glDepthFunc(GL_LESS); + + /* "traditional / Z-pass" method: + * front face: incr on zpass + * back face: decr on zpass + * both front and back Z-test should pass here + */ + pass = set_stencil_state2(method, GL_KEEP, GL_KEEP, /* stencil fail */ + GL_KEEP, GL_KEEP, /* z fail */ + GL_INCR_WRAP_EXT, GL_DECR_WRAP_EXT, /* z pass */ + GL_ALWAYS, GL_ALWAYS, /* stencil func */ + 0, ~0, ~0); /* ref, mask, set write_mask to ~0 */ + if (pass) + pass = render_test(1, stencil_max); + reset_stencil_state(method); + if (!pass) + return false; + + + /* "Z-fail" method: + * front face: decr on zfail + * back face: incr on zfail + * both front and back Z-test should fail here + */ + pass = set_stencil_state2(method, GL_KEEP, GL_KEEP, /* stencil fail */ + GL_DECR_WRAP_EXT, GL_INCR_WRAP_EXT, /* z fail */ + GL_KEEP, GL_KEEP, /* z pass */ + GL_ALWAYS, GL_ALWAYS, /* stencil func */ + 0, ~0, ~0); /* ref, mask, set write_mask to ~0 */ + if (pass) + pass = render_test(0, 0); + reset_stencil_state(method); + if (!pass) + return false; + + + return true; +} + + +void +piglit_init(int argc, char **argv) +{ + /* no initialization */ +} + + +enum piglit_result +piglit_display(void) +{ + bool pass = true; + + /* how many stencil bits (we assume at least 8 above) */ + glGetIntegerv(GL_STENCIL_BITS, &stencil_bits); + stencil_max = (1 << stencil_bits) - 1; + assert(stencil_bits >= 8); + + glViewport(0, 0, piglit_width, piglit_width); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glOrtho(0, piglit_width, 0, piglit_width, -1, 1); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + + if (piglit_is_extension_supported("GL_ATI_separate_stencil")) { + pass = test_stencil(ATI) && pass; + } + + if (piglit_is_extension_supported("GL_EXT_stencil_two_side")) { + pass = test_stencil(EXT) && pass; + } + + if (piglit_get_gl_version() >= 2.0) { + pass = test_stencil(GL2) && pass; + } + + return pass ? PIGLIT_PASS : PIGLIT_FAIL; +} |