[Piglit] [PATCH] Add test for ARB_clip_control v4.
Ilia Mirkin
imirkin at alum.mit.edu
Fri Nov 14 12:48:46 PST 2014
I don't think I've tested this since v2, but an interesting
observation is that on nvidia hw, if I force clip_halfz to 0, the v2
test passed, but if I force it to 1, then some of the things fail.
Could there be another clipping stage, e.g. viewport, which "fixes"
things? If so, perhaps you can try to disable/alter it somehow? If
not, any other ideas as to why the test might be working on nvidia hw?
On Tue, Nov 4, 2014 at 12:54 AM, <Mathias.Froehlich at gmx.net> wrote:
> 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
>
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