[Piglit] [PATCH] Add test for ARB_clip_control v4.
Mathias.Froehlich at gmx.net
Mathias.Froehlich at gmx.net
Mon Nov 3 21:54:06 PST 2014
From: Mathias Fröhlich <Mathias.Froehlich at gmx.net>
Hi,
This adds clip control to the set of piglit tests.
I incorporated the pending change requests.
please review, and if ok, can somebody with piglit
push access feed that to the repository, as I don't
have write access to piglit IIRC.
Mathias
v2:
Check for ARB_depth_buffer_float where used.
Fix and extend comments.
Introduce helper for reading and checking the clip control state.
Split state and draw related parts into separate methods.
Test for Push/PopAttrib.
v3:
Add tests to tests/all.py.
v4:
Use piglit_draw_rect_z instead of a hand written function.
Signed-off-by: Mathias Froehlich <Mathias.Froehlich at web.de>
CC: Ilia Mirkin <imirkin at alum.mit.edu>
CC: Brian Paul <brianp at vmware.com>
CC: Kenneth Graunke <kenneth at whitecape.org>
---
registry/gl.xml | 23 +-
tests/all.py | 5 +
tests/spec/CMakeLists.txt | 1 +
tests/spec/arb_clip_control/CMakeLists.gl.txt | 15 ++
tests/spec/arb_clip_control/CMakeLists.txt | 1 +
.../clip-control-depth-precision.c | 174 ++++++++++++++
tests/spec/arb_clip_control/clip-control.c | 252 +++++++++++++++++++++
7 files changed, 470 insertions(+), 1 deletion(-)
create mode 100644 tests/spec/arb_clip_control/CMakeLists.gl.txt
create mode 100644 tests/spec/arb_clip_control/CMakeLists.txt
create mode 100644 tests/spec/arb_clip_control/clip-control-depth-precision.c
create mode 100644 tests/spec/arb_clip_control/clip-control.c
diff --git a/registry/gl.xml b/registry/gl.xml
index 30e8d9f..d432d3d 100644
--- a/registry/gl.xml
+++ b/registry/gl.xml
@@ -7916,7 +7916,12 @@ typedef unsigned int GLhandleARB;
<enum value="0x934A" name="GL_LOCATION_COMPONENT"/>
<enum value="0x934B" name="GL_TRANSFORM_FEEDBACK_BUFFER_INDEX"/>
<enum value="0x934C" name="GL_TRANSFORM_FEEDBACK_BUFFER_STRIDE"/>
- <unused start="0x934D" end="0x9364"/>
+ <unused start="0x934D" end="0x935B"/>
+ <enum value="0x935C" name="GL_CLIP_ORIGIN"/>
+ <enum value="0x935D" name="GL_CLIP_DEPTH_MODE"/>
+ <enum value="0x935E" name="GL_NEGATIVE_ONE_TO_ONE"/>
+ <enum value="0x935F" name="GL_ZERO_TO_ONE"/>
+ <unused start="0x9360" end="0x9364"/>
<enum value="0x9365" name="GL_CLEAR_TEXTURE"/>
<unused start="0x9366" end="0x937F"/>
</enums>
@@ -9085,6 +9090,11 @@ typedef unsigned int GLhandleARB;
<glx type="render" opcode="2"/>
</command>
<command>
+ <proto>void <name>glClipControl</name></proto>
+ <param><ptype>GLenum</ptype> <name>origin</name></param>
+ <param><ptype>GLenum</ptype> <name>depth</name></param>
+ </command>
+ <command>
<proto><ptype>GLenum</ptype> <name>glCheckFramebufferStatus</name></proto>
<param group="FramebufferTarget"><ptype>GLenum</ptype> <name>target</name></param>
<glx type="vendor" opcode="1427"/>
@@ -33515,6 +33525,17 @@ typedef unsigned int GLhandleARB;
<command name="glClearTexSubImage"/>
</require>
</extension>
+ <extension name="GL_ARB_clip_control" supported="gl">
+ <require>
+ <enum name="GL_LOWER_LEFT"/>
+ <enum name="GL_UPPER_LEFT"/>
+ <enum name="GL_NEGATIVE_ONE_TO_ONE"/>
+ <enum name="GL_ZERO_TO_ONE"/>
+ <enum name="GL_CLIP_ORIGIN"/>
+ <enum name="GL_CLIP_DEPTH_MODE"/>
+ <command name="glClipControl"/>
+ </require>
+ </extension>
<extension name="GL_ARB_color_buffer_float" supported="gl">
<require>
<enum name="GL_RGBA_FLOAT_MODE_ARB"/>
diff --git a/tests/all.py b/tests/all.py
index 3a2f4e2..d163f9c 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -2278,6 +2278,11 @@ add_fbo_generatemipmap_extension(tdfx_texture_compression_fxt1, 'GL_3DFX_texture
tdfx_texture_compression_fxt1['invalid formats'] = PiglitGLTest('arb_texture_compression-invalid-formats fxt1', run_concurrent=True)
add_plain_test(tdfx_texture_compression_fxt1, 'fxt1-teximage')
+arb_clip_control = {}
+spec['ARB_clip_control'] = arb_clip_control
+add_plain_test(arb_clip_control, 'clip-control')
+add_plain_test(arb_clip_control, 'clip-control-depth-precision')
+
def add_color_buffer_float_test(name, format, p1, p2):
arb_color_buffer_float[format + '-' + name + ('-' + p1 if len(p1) else '') + ('-' + p2 if len(p2) else '')] = PiglitGLTest(' '.join(['arb_color_buffer_float-' + name, format, p1, p2]), run_concurrent=True)
diff --git a/tests/spec/CMakeLists.txt b/tests/spec/CMakeLists.txt
index b2da115..5a347ae 100644
--- a/tests/spec/CMakeLists.txt
+++ b/tests/spec/CMakeLists.txt
@@ -3,6 +3,7 @@ add_subdirectory (arb_base_instance)
add_subdirectory (arb_buffer_storage)
add_subdirectory (arb_clear_buffer_object)
add_subdirectory (arb_clear_texture)
+add_subdirectory (arb_clip_control)
add_subdirectory (arb_color_buffer_float)
add_subdirectory (arb_copy_image)
add_subdirectory (arb_compute_shader)
diff --git a/tests/spec/arb_clip_control/CMakeLists.gl.txt b/tests/spec/arb_clip_control/CMakeLists.gl.txt
new file mode 100644
index 0000000..3951bfb
--- /dev/null
+++ b/tests/spec/arb_clip_control/CMakeLists.gl.txt
@@ -0,0 +1,15 @@
+include_directories(
+ ${GLEXT_INCLUDE_DIR}
+ ${OPENGL_INCLUDE_PATH}
+)
+
+link_libraries (
+ piglitutil_${piglit_target_api}
+ ${OPENGL_gl_LIBRARY}
+ ${OPENGL_glu_LIBRARY}
+)
+
+piglit_add_executable (clip-control clip-control.c)
+piglit_add_executable (clip-control-depth-precision clip-control-depth-precision.c)
+
+# vim: ft=cmake:
diff --git a/tests/spec/arb_clip_control/CMakeLists.txt b/tests/spec/arb_clip_control/CMakeLists.txt
new file mode 100644
index 0000000..144a306
--- /dev/null
+++ b/tests/spec/arb_clip_control/CMakeLists.txt
@@ -0,0 +1 @@
+piglit_include_target_api()
diff --git a/tests/spec/arb_clip_control/clip-control-depth-precision.c b/tests/spec/arb_clip_control/clip-control-depth-precision.c
new file mode 100644
index 0000000..87d928e
--- /dev/null
+++ b/tests/spec/arb_clip_control/clip-control-depth-precision.c
@@ -0,0 +1,174 @@
+/*
+ * Copyright Mathias Fröhlich <Mathias.Froehlich at web.de>
+ *
+ * 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:
+ * Mathias Fröhlich <Mathias.Froehlich at web.de>
+ */
+
+/** @file clip-control-depth-precision.c
+ *
+ * Test for ARB_clip_control.
+ * This is actually the application level use case making use of the
+ * close to logarithmic depth buffer precision available with the
+ * GL_ZERO_TO_ONE depth mode that is newly provided with this extension.
+ * The ARB_clip_control spec gives a set of web references explaining the
+ * background greatly.
+ * In short we set up a projection matrix that maps infinite far away
+ * points to 0 and the near plane to 1. We use a float depth buffer
+ * with a well known accuracy behavior. That together gives a depth
+ * buffer resolution that is about the relative floating point accuracy
+ * relative to the distance from the eye point.
+ * This extension avoids adding a constant number even in an intermediate
+ * step which would destroy the effective depth precision possible with
+ * the floating point depth buffers.
+ * Roughtly in numbers:
+ * Two fragments at 5000001 and 5000000 \about 5000001*(1 - eps) distance
+ * from the eye point should yield to different values in the depth buffer.
+ * The same goes for about any fragment distance x that you should be able
+ * to distinguish this from x*(1 - eps).
+ * And this is exactly what this test checks. We draw two surfaces
+ * a big red one at a distance x and a half that big green one at a distance
+ * x*(1 - 10*eps) to have a security factor of 10 to allow for some roundoff
+ * errors to accumulate. Due to the depth precision we must not get z fighting
+ * between these two and see a nested green solid square inside a bigger red
+ * square really behind it.
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_compat_version = 20;
+
+ config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+void
+piglit_init(int argc, char **argv)
+{
+ GLdouble projection[16] = { 0.0, };
+
+ piglit_require_extension("GL_ARB_clip_control");
+ piglit_require_extension("GL_ARB_depth_buffer_float");
+ piglit_require_extension("GL_EXT_framebuffer_object");
+ piglit_require_extension("GL_EXT_framebuffer_blit");
+
+ /* Set up a projection matrix mapping z = -1 to z = 1
+ * and z = -inf to z = 0 in projection space.
+ * Given the clip control setting below, this is just
+ * written as is into the float depth buffer.
+ */
+ projection[0 + 4*0] = 1;
+ projection[1 + 4*1] = (GLdouble)piglit_width/piglit_height;
+ projection[2 + 4*3] = 1;
+ projection[3 + 4*2] = -1;
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadMatrixd(projection);
+
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ GLfloat red[3] = { 1, 0, 0 };
+ GLfloat green[3] = { 0, 1, 0 };
+ GLboolean pass = GL_TRUE;
+ GLuint fb, cb, db;
+ GLenum status;
+ int range10;
+
+ glGenRenderbuffers(1, &cb);
+ glBindRenderbuffer(GL_RENDERBUFFER, cb);
+ glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA, piglit_width, piglit_height);
+ glBindRenderbuffer(GL_RENDERBUFFER, 0);
+
+ glGenRenderbuffers(1, &db);
+ glBindRenderbuffer(GL_RENDERBUFFER, db);
+ glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT32F, piglit_width, piglit_height);
+ glBindRenderbuffer(GL_RENDERBUFFER, 0);
+
+ glGenFramebuffers(1, &fb);
+ glBindFramebuffer(GL_FRAMEBUFFER, fb);
+ glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, cb);
+ glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, db);
+
+ status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+ if (status != GL_FRAMEBUFFER_COMPLETE) {
+ printf("FBO incomplete status 0x%X\n", status);
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ glClipControl(GL_LOWER_LEFT, GL_ZERO_TO_ONE);
+ glClearDepth(0);
+ glDepthRange(0, 1);
+ glClearColor(0, 0, 0, 1);
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ glEnable(GL_DEPTH_TEST);
+ glDepthFunc(GL_GREATER);
+
+ for (range10 = 0; range10 < 16; ++range10) {
+ int width = piglit_width/4;
+ int height = piglit_height/4;
+ int tilex = range10 % 4;
+ int tiley = range10 / 4;
+ int x = tilex*width;
+ int y = tiley*height;
+ double z = pow(10, 1 + range10);
+
+ /* Set up a new viewport for each depth we want to test */
+ glViewport(x, y, width, height);
+
+ /* Draw a red surface at given distance z */
+ glColor3fv(red);
+ piglit_draw_rect_z(-z, -0.5*z, -0.5*z, z, z);
+
+ pass = piglit_probe_pixel_rgb(x + width/2, y + height/2, red) && pass;
+
+ /* And a green one just close in front of that red one */
+ glColor3fv(green);
+ piglit_draw_rect_z((10*FLT_EPSILON - 1)*z, -0.25*z, -0.25*z, 0.5*z, 0.5*z);
+
+ pass = piglit_probe_pixel_rgb(x + width/2, y + height/2, green) && pass;
+ }
+
+
+ /* set viewport to window size */
+ glViewport(0, 0, piglit_width, piglit_height);
+
+ /* copy the result to the back buffer */
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, fb);
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+ glBlitFramebuffer(0, 0, piglit_width, piglit_height, 0, 0, piglit_width, piglit_height, GL_COLOR_BUFFER_BIT, GL_NEAREST);
+ glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+ glDeleteFramebuffers(1, &fb);
+ glDeleteRenderbuffers(1, &cb);
+ glDeleteRenderbuffers(1, &db);
+
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
diff --git a/tests/spec/arb_clip_control/clip-control.c b/tests/spec/arb_clip_control/clip-control.c
new file mode 100644
index 0000000..244587c
--- /dev/null
+++ b/tests/spec/arb_clip_control/clip-control.c
@@ -0,0 +1,252 @@
+/*
+ * Copyright Mathias Fröhlich <Mathias.Froehlich at web.de>
+ *
+ * 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:
+ * Mathias Fröhlich <Mathias.Froehlich at web.de>
+ */
+
+/** @file clip-control.c
+ *
+ * Basic test for ARB_clip_contol.
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_compat_version = 20;
+
+ config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_DEPTH;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+void
+piglit_init(int argc, char **argv)
+{
+ piglit_require_extension("GL_ARB_clip_control");
+
+ piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+}
+
+GLboolean
+test_clip_control(GLenum origin, GLenum mode)
+{
+ GLboolean pass;
+ GLint value;
+
+ pass = piglit_check_gl_error(GL_NO_ERROR);
+
+ glGetIntegerv(GL_CLIP_ORIGIN, &value);
+ if (value != origin) {
+ fprintf(stderr, "glClipControl origin unexpected!\n");
+ pass = GL_FALSE;
+ }
+ glGetIntegerv(GL_CLIP_DEPTH_MODE, &value);
+ if (value != mode) {
+ fprintf(stderr, "glClipControl mode unexpected!\n");
+ pass = GL_FALSE;
+ }
+
+ return pass;
+}
+
+GLboolean
+state_test(void)
+{
+ GLboolean pass = GL_TRUE;
+
+ /* The initial values */
+ pass = test_clip_control(GL_LOWER_LEFT, GL_NEGATIVE_ONE_TO_ONE) && pass;
+
+ glClipControl(GL_LOWER_LEFT, GL_ZERO_TO_ONE);
+ pass = test_clip_control(GL_LOWER_LEFT, GL_ZERO_TO_ONE) && pass;
+
+ glClipControl(GL_UPPER_LEFT, GL_ZERO_TO_ONE);
+ pass = test_clip_control(GL_UPPER_LEFT, GL_ZERO_TO_ONE) && pass;
+
+ glClipControl(GL_UPPER_LEFT, GL_NEGATIVE_ONE_TO_ONE);
+ pass = test_clip_control(GL_UPPER_LEFT, GL_NEGATIVE_ONE_TO_ONE) && pass;
+
+ /* Check bailing out on invalid input */
+ glClipControl(GL_RGB, GL_NEGATIVE_ONE_TO_ONE);
+ pass = piglit_check_gl_error(GL_INVALID_ENUM) && pass;
+ piglit_reset_gl_error();
+ pass = test_clip_control(GL_UPPER_LEFT, GL_NEGATIVE_ONE_TO_ONE) && pass;
+
+ glClipControl(GL_LOWER_LEFT, GL_RGB);
+ pass = piglit_check_gl_error(GL_INVALID_ENUM) && pass;
+ piglit_reset_gl_error();
+ pass = test_clip_control(GL_UPPER_LEFT, GL_NEGATIVE_ONE_TO_ONE) && pass;
+
+
+ /* Check push/pop */
+ glClipControl(GL_LOWER_LEFT, GL_NEGATIVE_ONE_TO_ONE);
+ pass = test_clip_control(GL_LOWER_LEFT, GL_NEGATIVE_ONE_TO_ONE) && pass;
+
+ glPushAttrib(GL_TRANSFORM_BIT);
+
+ glClipControl(GL_UPPER_LEFT, GL_ZERO_TO_ONE);
+ pass = test_clip_control(GL_UPPER_LEFT, GL_ZERO_TO_ONE) && pass;
+
+ /* Back to default */
+ glPopAttrib();
+ pass = test_clip_control(GL_LOWER_LEFT, GL_NEGATIVE_ONE_TO_ONE) && pass;
+
+ return pass;
+}
+
+GLboolean
+draw_test(void)
+{
+ GLboolean pass = GL_TRUE;
+
+ /* Now prepare the draw buffer */
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ glEnable(GL_DEPTH_TEST);
+
+ /* Also test the winding order logic */
+ glEnable(GL_CULL_FACE);
+ glCullFace(GL_BACK);
+
+ /* The clear value - to be sure */
+ pass = piglit_probe_pixel_depth(5, 5, 1.0) && pass;
+
+
+
+ /* Back to default */
+ glClipControl(GL_LOWER_LEFT, GL_NEGATIVE_ONE_TO_ONE);
+
+ /* inside the clip space */
+ piglit_draw_rect_z(1.0, 10, 10, 10, 10);
+ piglit_draw_rect_z(0.5, 10, 30, 10, 10);
+ piglit_draw_rect_z(0.0, 10, 50, 10, 10);
+ piglit_draw_rect_z(-0.5, 10, 70, 10, 10);
+
+ /* outside the clip space */
+ piglit_draw_rect_z(1.5, 10, 90, 10, 10);
+ piglit_draw_rect_z(-1.5, 10, 110, 10, 10);
+
+ /* the written depth value */
+ pass = piglit_probe_pixel_depth(15, 15, 0.0) && pass;
+ pass = piglit_probe_pixel_depth(15, 35, 0.25) && pass;
+ pass = piglit_probe_pixel_depth(15, 55, 0.5) && pass;
+ pass = piglit_probe_pixel_depth(15, 75, 0.75) && pass;
+
+ /* still the clear value */
+ pass = piglit_probe_pixel_depth(15, 95, 1.0) && pass;
+ pass = piglit_probe_pixel_depth(15, 115, 1.0) && pass;
+
+
+
+ glClipControl(GL_LOWER_LEFT, GL_ZERO_TO_ONE);
+
+ /* inside the clip space */
+ piglit_draw_rect_z(0.0, 30, 10, 10, 10);
+ piglit_draw_rect_z(-0.25, 30, 30, 10, 10);
+ piglit_draw_rect_z(-0.5, 30, 50, 10, 10);
+ piglit_draw_rect_z(-0.75, 30, 70, 10, 10);
+
+ /* outside the clip space */
+ piglit_draw_rect_z(0.25, 30, 90, 10, 10);
+ piglit_draw_rect_z(-1.25, 30, 110, 10, 10);
+
+ /* the written depth value */
+ pass = piglit_probe_pixel_depth(35, 15, 0.0) && pass;
+ pass = piglit_probe_pixel_depth(35, 35, 0.25) && pass;
+ pass = piglit_probe_pixel_depth(35, 55, 0.5) && pass;
+ pass = piglit_probe_pixel_depth(35, 75, 0.75) && pass;
+
+ /* still the clear value */
+ pass = piglit_probe_pixel_depth(35, 95, 1.0) && pass;
+ pass = piglit_probe_pixel_depth(35, 115, 1.0) && pass;
+
+
+
+ glClipControl(GL_UPPER_LEFT, GL_NEGATIVE_ONE_TO_ONE);
+
+ /* inside the clip space */
+ piglit_draw_rect_z(1.0, 50, piglit_height - 20, 10, 10);
+ piglit_draw_rect_z(0.5, 50, piglit_height - 40, 10, 10);
+ piglit_draw_rect_z(0.0, 50, piglit_height - 60, 10, 10);
+ piglit_draw_rect_z(-0.5, 50, piglit_height - 80, 10, 10);
+
+ /* outside the clip space */
+ piglit_draw_rect_z(1.5, 50, piglit_height - 100, 10, 10);
+ piglit_draw_rect_z(-1.5, 50, piglit_height - 120, 10, 10);
+
+ /* the written depth value */
+ pass = piglit_probe_pixel_depth(55, 15, 0.0) && pass;
+ pass = piglit_probe_pixel_depth(55, 35, 0.25) && pass;
+ pass = piglit_probe_pixel_depth(55, 55, 0.5) && pass;
+ pass = piglit_probe_pixel_depth(55, 75, 0.75) && pass;
+
+ /* still the clear value */
+ pass = piglit_probe_pixel_depth(55, 95, 1.0) && pass;
+ pass = piglit_probe_pixel_depth(55, 115, 1.0) && pass;
+
+
+
+ glClipControl(GL_UPPER_LEFT, GL_ZERO_TO_ONE);
+
+ /* inside the clip space */
+ piglit_draw_rect_z(0.0, 70, piglit_height - 20, 10, 10);
+ piglit_draw_rect_z(-0.25, 70, piglit_height - 40, 10, 10);
+ piglit_draw_rect_z(-0.5, 70, piglit_height - 60, 10, 10);
+ piglit_draw_rect_z(-0.75, 70, piglit_height - 80, 10, 10);
+
+ /* outside the clip space */
+ piglit_draw_rect_z(0.25, 70, piglit_height - 100, 10, 10);
+ piglit_draw_rect_z(-1.25, 70, piglit_height - 120, 10, 10);
+
+ /* the written depth value */
+ pass = piglit_probe_pixel_depth(75, 15, 0.0) && pass;
+ pass = piglit_probe_pixel_depth(75, 35, 0.25) && pass;
+ pass = piglit_probe_pixel_depth(75, 55, 0.5) && pass;
+ pass = piglit_probe_pixel_depth(75, 75, 0.75) && pass;
+
+ /* still the clear value */
+ pass = piglit_probe_pixel_depth(75, 95, 1.0) && pass;
+ pass = piglit_probe_pixel_depth(75, 115, 1.0) && pass;
+
+
+
+ /* Back to default */
+ glClipControl(GL_LOWER_LEFT, GL_NEGATIVE_ONE_TO_ONE);
+
+ piglit_present_results();
+
+ return pass;
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ GLboolean pass;
+
+ /* Check for getting and setting the state. */
+ pass = state_test();
+
+ /* Check for correct draws according to the state. */
+ pass = draw_test() && pass;
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
--
1.9.3
More information about the Piglit
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