tests/spec/amd_depth_clamp_separate/depth-clamp-range.c

   1 /*
   2  * Copyright © 2018 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
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   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  */
  24
  25 /** @file depth-clamp-range.c
  26  *
  27  * Tests that AMD_depth_clamp_separate enablement didn't break DepthRange
  28  * functionality, and properly uses the min/max selection.
  29  */
  30
  31 #include "piglit-util-gl.h"
  32
  33 PIGLIT_GL_TEST_CONFIG_BEGIN
  34
  35         config.supports_gl_core_version = 32;
  36         config.supports_gl_compat_version = 32;
  37         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  38         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE
  39                                | PIGLIT_GL_VISUAL_DEPTH;
  40
  41 PIGLIT_GL_TEST_CONFIG_END
  42
  43 static GLuint program;
  44 static GLint projection_loc;
  45
  46 static GLuint
  47 make_program(void)
  48 {
  49         static const char *vs_text =
  50                 "#version 330 \n"
  51                 "in vec4 vertex; \n"
  52                 "uniform mat4 projection; \n"
  53                 "void main() \n"
  54                 "{ \n"
  55                 "   gl_Position = projection * vertex; \n"
  56                 "} \n";
  57
  58         static const char *fs_text =
  59                 "#version 330 \n"
  60                 "void main() \n"
  61                 "{ \n"
  62                 "   gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0); \n"
  63                 "} \n";
  64
  65         GLuint program = piglit_build_simple_program(vs_text, fs_text);
  66
  67         return program;
  68 }
  69
  70 void
  71 piglit_init(int argc, char **argv)
  72 {
  73         piglit_require_extension("GL_AMD_depth_clamp_separate");
  74         program = make_program();
  75 }
  76
  77 enum piglit_result
  78 piglit_display(void)
  79 {
  80         GLboolean pass = GL_TRUE;
  81         float white[3] = {1.0, 1.0, 1.0};
  82         float clear[3] = {0.0, 0.0, 0.0};
  83
  84         glClearDepth(0.5);
  85         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  86         glEnable(GL_DEPTH_TEST);
  87         glDepthFunc(GL_LEQUAL);
  88
  89         glUseProgram(program);
  90
  91         projection_loc = glGetUniformLocation(program, "projection");
  92         piglit_ortho_uniform(projection_loc, piglit_width, piglit_height);
  93
  94         /* Keep in mind that the ortho projection flips near and far's signs,
  95          * so 1.0 to quad()'s z maps to glDepthRange's near, and -1.0 maps to
  96          * glDepthRange's far.
  97          */
  98
  99         /* Basic glDepthRange testing. */
 100         glDisable(GL_DEPTH_CLAMP_NEAR_AMD);
 101         glDisable(GL_DEPTH_CLAMP_FAR_AMD);
 102         glDepthRange(0, 1);
 103         piglit_draw_rect_z(0.5, 10, 10, 10, 10); /* .25 - drawn. */
 104
 105         glDepthRange(1, 0);
 106         piglit_draw_rect_z(0.5, 10, 30, 10, 10); /* 0.75 - not drawn. */
 107
 108         /* Now, test that near depth clamping works.*/
 109         glEnable(GL_DEPTH_CLAMP_NEAR_AMD);
 110         glDepthRange(0.25, 1.0);
 111         piglit_draw_rect_z(4, 30, 10, 10, 10); /* .25 - drawn. */
 112
 113         glDisable(GL_DEPTH_CLAMP_NEAR_AMD);
 114         glEnable(GL_DEPTH_CLAMP_FAR_AMD);
 115         glDepthRange(0.75, 1.0);
 116         piglit_draw_rect_z(4, 30, 30, 10, 10); /* 0.75 - not drawn. */
 117
 118         /* Test that far clamping works.*/
 119         glDepthRange(0.0, 0.25);
 120         piglit_draw_rect_z(-4, 50, 10, 10, 10); /* .25 - drawn. */
 121
 122         glDepthRange(0.0, 0.75);
 123         piglit_draw_rect_z(-4, 50, 30, 10, 10); /* 0.75 - not drawn. */
 124
 125         /* Now, flip near and far around and make sure that it's doing the
 126          * min/max of near and far in the clamping.
 127          */
 128
 129         /* Test that near (max) clamping works. */
 130         glEnable(GL_DEPTH_CLAMP_NEAR_AMD);
 131         glDepthRange(0.25, 0.0);
 132         piglit_draw_rect_z(4, 70, 10, 10, 10); /* .25 - drawn. */
 133
 134         glDisable(GL_DEPTH_CLAMP_NEAR_AMD);
 135         glEnable(GL_DEPTH_CLAMP_FAR_AMD);
 136         glDepthRange(0.75, 0.0);
 137         piglit_draw_rect_z(4, 70, 30, 10, 10); /* 0.75 - not drawn. */
 138
 139         /* Now, test far (min) clamping works. */
 140         glDepthRange(1.0, 0.0);
 141         piglit_draw_rect_z(-4, 90, 10, 10, 10); /* 0.0 - drawn. */
 142
 143         glDisable(GL_DEPTH_CLAMP_FAR_AMD);
 144         glDepthRange(1.0, 0.75);
 145         piglit_draw_rect_z(-4, 90, 30, 10, 10); /* 0.75 - drawn. */
 146
 147         pass = piglit_probe_pixel_rgb(15, 15, white) && pass;
 148         pass = piglit_probe_pixel_rgb(15, 35, clear) && pass;
 149         pass = piglit_probe_pixel_rgb(35, 15, white) && pass;
 150         pass = piglit_probe_pixel_rgb(35, 35, clear) && pass;
 151         pass = piglit_probe_pixel_rgb(55, 15, white) && pass;
 152         pass = piglit_probe_pixel_rgb(55, 35, clear) && pass;
 153         pass = piglit_probe_pixel_rgb(75, 15, white) && pass;
 154         pass = piglit_probe_pixel_rgb(75, 35, clear) && pass;
 155         pass = piglit_probe_pixel_rgb(95, 15, white) && pass;
 156         pass = piglit_probe_pixel_rgb(95, 35, clear) && pass;
 157
 158         piglit_present_results();
 159
 160         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 161 }