tests/fast_color_clear/write-after-clear.c

   1 /* Copyright © 2020 Intel Corporation
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a
   4  * copy of this software and associated documentation files (the "Software"),
   5  * to deal in the Software without restriction, including without limitation
   6  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   7  * and/or sell copies of the Software, and to permit persons to whom the
   8  * Software is furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice (including the next
  11  * paragraph) shall be included in all copies or substantial portions of the
  12  * Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  20  * IN THE SOFTWARE.
  21  */
  22
  23 /**
  24  * Check that drivers track the inputs to the fast-clear (clear color, format,
  25  * etc.) to correctly write to a fast-cleared block.
  26  */
  27
  28 #include "piglit-util-gl.h"
  29
  30
  31 PIGLIT_GL_TEST_CONFIG_BEGIN
  32
  33 config.supports_gl_core_version = 43;
  34
  35 PIGLIT_GL_TEST_CONFIG_END
  36
  37 enum piglit_result
  38 piglit_display(void)
  39 {
  40         return PIGLIT_FAIL;
  41 }
  42
  43
  44 union color_value {
  45         uint32_t uint[4];
  46         float flt[4];
  47 };
  48
  49 /* Returns the type of values used when specifying the clear color of a
  50  * texture with a given format.
  51  */
  52 static GLenum
  53 format_clear_value_type(GLuint format)
  54 {
  55         switch (format) {
  56         case GL_RGBA8:
  57         case GL_SRGB8_ALPHA8:
  58         case GL_RGBA8_SNORM:
  59                 return GL_FLOAT;
  60         case GL_RGBA8UI:
  61                 return GL_UNSIGNED_INT;
  62         default:
  63                 abort();
  64         }
  65 }
  66
  67 /* Clears a subregion of a texture starting from the origin. */
  68 static void
  69 tex_sub_clear(GLuint tex, GLuint format, union color_value color,
  70               uint32_t w, uint32_t h)
  71 {
  72         /* Perform a scissored clear through an fbo, so that the clear color
  73          * is interpreted through the texture format.
  74          */
  75         GLuint fbo;
  76         glGenFramebuffers(1, &fbo);
  77         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
  78         glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, tex, 0);
  79         glEnable(GL_FRAMEBUFFER_SRGB);
  80         glEnable(GL_SCISSOR_TEST);
  81         glScissor(0, 0, w, h);
  82
  83         if (format_clear_value_type(format) == GL_UNSIGNED_INT) {
  84                 glClearBufferuiv(GL_COLOR, 0, color.uint);
  85         } else {
  86                 assert(format_clear_value_type(format) == GL_FLOAT);
  87                 glClearBufferfv(GL_COLOR, 0, color.flt);
  88         }
  89
  90         glDisable(GL_SCISSOR_TEST);
  91         glDisable(GL_FRAMEBUFFER_SRGB);
  92         glDeleteFramebuffers(1, &fbo);
  93 }
  94
  95 struct clear_list {
  96         GLuint format;
  97         uint32_t z;
  98         uint32_t w;
  99         uint32_t h;
 100         uint32_t d;
 101         union color_value color;
 102 };
 103
 104 /* Clears a texture's data store according to the list then probes for a
 105  * specific pixel.
 106  */
 107 static bool
 108 test_clear_list(GLuint tex_format, uint32_t tw, uint32_t th, uint32_t td,
 109                 uint32_t num_clears, const struct clear_list *list,
 110                 uint32_t px, uint32_t py, uint32_t pz,
 111                 union color_value probe_pix)
 112 {
 113         /* Create the texture storage. */
 114         GLuint tex;
 115         glGenTextures(1, &tex);
 116         glBindTexture(GL_TEXTURE_2D_ARRAY, tex);
 117         glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1, tex_format, tw, th, td);
 118
 119         /* Clear the views. */
 120         for (int i = 0; i < num_clears; i++) {
 121                 GLuint view;
 122                 glGenTextures(1, &view);
 123                 glTextureView(view, GL_TEXTURE_2D_ARRAY, tex, list[i].format,
 124                               0, 1, list[i].z, list[i].d);
 125                 tex_sub_clear(view, list[i].format, list[i].color,
 126                               list[i].w, list[i].h);
 127                 glDeleteTextures(1, &view);
 128         }
 129
 130         /* Inspect the texture. */
 131         assert(format_clear_value_type(tex_format) == GL_FLOAT);
 132         const bool matched_pixel =
 133                 piglit_probe_texel_volume_rgba(GL_TEXTURE_2D_ARRAY, 0,
 134                                                px, py, pz, 1, 1, 1,
 135                                                probe_pix.flt);
 136
 137         /* Delete the texture. */
 138         glDeleteTextures(1, &tex);
 139         return matched_pixel;
 140 }
 141
 142 #define entry(fmt, layer, width, height, depth, col) \
 143         { .format = fmt, .z = layer, .w = width, . h = height, .d = depth, \
 144           .color = col }
 145
 146 static bool
 147 test_clear_after_clear(GLuint tex_format, uint32_t tw, uint32_t th,
 148                        union color_value tex_color,
 149                        GLuint view_format, uint32_t vw, uint32_t vh,
 150                        union color_value view_color,
 151                        uint32_t px, uint32_t py,
 152                        union color_value probe_pix)
 153 {
 154         const struct clear_list list[] = {
 155           entry(tex_format, 0, tw, th, 1, tex_color),
 156           entry(view_format, 0, vw, vh, 1, view_color)
 157         };
 158         return test_clear_list(tex_format, tw, th, 1,
 159                                2, list, px, py, 0, probe_pix);
 160 }
 161
 162 static void
 163 color_value_linear_to_srgb(const union color_value *linear,
 164                            union color_value *srgb)
 165 {
 166         for (int i = 0; i < 3; i++) {
 167                 srgb->flt[i] =
 168                         piglit_linear_to_srgb(linear->flt[i]);
 169         }
 170         srgb->flt[3] = linear->flt[3];
 171 }
 172
 173 void
 174 piglit_init(int argc, char **argv)
 175 {
 176         bool pass = true;
 177
 178         const union color_value flt_one = { .flt = {1.0, 1.0, 1.0, 1.0} };
 179         const union color_value flt_half = { .flt = {0.5, 0.5, 0.5, 0.5} };
 180         union color_value half_linear_to_srgb;
 181         color_value_linear_to_srgb(&flt_half, &half_linear_to_srgb);
 182
 183         /* Depending on the clear color and view format a resolve may be
 184          * needed before reading a fast-cleared block. On gen7+, such a block
 185          * is implicitly read when part of it is written to. On gen12, it may
 186          * also be implicitly read when all of it is written to.
 187          *
 188          * These additional properties should be noted for test creation:
 189          * * On gen7-8, the fast-clear channel values allowed are 0 for any
 190          *   format, 1.0 for floats, and 1 for ints.
 191          * * On gen12, all compression is lost when a texture format's
 192          *   bits-per-channel changes.
 193          */
 194
 195         puts("Testing implicit read of partial block "
 196              "(linear storage) linear ->  sRGB");
 197         pass &= test_clear_after_clear(GL_RGBA8, 32, 32, flt_half,
 198                                        GL_SRGB8_ALPHA8, 1, 1, flt_one,
 199                                        0, 1, flt_half);
 200
 201         puts("Testing implicit read of partial block "
 202              "(sRGB storage) linear ->  sRGB");
 203         {
 204                 const struct clear_list list[] = {
 205                   entry(GL_RGBA8, 0, 32, 32, 1, flt_half),
 206                   entry(GL_SRGB8_ALPHA8, 0, 1, 1, 1, flt_half),
 207                 };
 208                 pass &= test_clear_list(GL_SRGB8_ALPHA8, 32, 32, 1,
 209                                         2, list, 0, 1, 0, flt_half);
 210         }
 211
 212         puts("Testing implicit read of partial block sRGB -> linear");
 213         pass &= test_clear_after_clear(GL_SRGB8_ALPHA8, 32, 32, flt_half,
 214                                        GL_RGBA8, 1, 1, flt_one,
 215                                        0, 1, half_linear_to_srgb);
 216
 217         puts("Testing implicit read of partial block sRGB -> sRGB");
 218         pass &= test_clear_after_clear(GL_SRGB8_ALPHA8, 32, 32, flt_half,
 219                                        GL_SRGB8_ALPHA8, 1, 1, flt_one,
 220                                        0, 1, half_linear_to_srgb);
 221
 222         puts("Testing implicit read of partial block UNORM -> SNORM");
 223         pass &= test_clear_after_clear(GL_RGBA8, 32, 32, flt_one,
 224                                        GL_RGBA8_SNORM, 1, 1, flt_one,
 225                                        0, 1, flt_one);
 226
 227         puts("Testing implicit read of full block UNORM -> SNORM");
 228         pass &= test_clear_after_clear(GL_RGBA8, 32, 32, flt_one,
 229                                        GL_RGBA8_SNORM, 8, 4, flt_one,
 230                                        0, 0, flt_half);
 231
 232         puts("Testing fast-clear tracking across layers 1 -> 0 -> 1");
 233         {
 234                 const struct clear_list list[] = {
 235                   entry(GL_RGBA8, 1, 32, 32, 1, flt_one),
 236                   entry(GL_RGBA8, 0, 32, 16, 1, flt_one),
 237                   entry(GL_RGBA8, 1, 32, 32, 1, flt_half),
 238                 };
 239                 pass &= test_clear_list(GL_RGBA8, 32, 32, 2,
 240                                         3, list, 0, 0, 0, flt_one);
 241         }
 242
 243         puts("Testing fast-clear tracking across layers 0 -> 1 -> (0-1)");
 244         {
 245                 const struct clear_list list[] = {
 246                   entry(GL_RGBA8, 0, 32, 32, 1, flt_one),
 247                   entry(GL_RGBA8, 1, 32, 16, 1, flt_half),
 248                   entry(GL_RGBA8, 0, 32, 32, 2, flt_one),
 249                 };
 250                 pass &= test_clear_list(GL_RGBA8, 32, 32, 2,
 251                                         3, list, 0, 0, 1, flt_one);
 252         }
 253
 254         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 255 }