tests/spec/arb_texture_view/clear-into-view-layered.c

   1 /*
   2  * Copyright © 2014 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
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   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 DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Author: Chris Forbes <chrisf@ijw.co.nz>
  24  */
  25
  26 /**
  27  * \file clear-into-view-layered.c
  28  * This tests that glClear() into a 2D array view, bound as a layered attachment,
  29  * works.
  30  */
  31
  32 #include "piglit-util-gl.h"
  33 #include "common.h"
  34
  35 PIGLIT_GL_TEST_CONFIG_BEGIN
  36
  37         config.supports_gl_core_version = 32;   /* for layered rendering */
  38         config.supports_gl_es_version = 31;
  39         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  40         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  41
  42 PIGLIT_GL_TEST_CONFIG_END
  43
  44 enum piglit_result
  45 piglit_display(void)
  46 {
  47         return PIGLIT_FAIL;
  48 }
  49
  50 #define NUM_LAYERS 7
  51 #define VIEW_MIN_LAYER 2
  52 #define VIEW_NUM_LAYERS 3
  53 #define TEX_SIZE 64
  54
  55 void
  56 piglit_init(int argc, char **argv)
  57 {
  58         GLuint tex, view;
  59         GLuint fbo;
  60         int i, j;
  61         bool pass = true;
  62
  63 #ifdef PIGLIT_USE_OPENGL
  64         piglit_require_extension("GL_ARB_texture_view");
  65 #else
  66         piglit_require_extension("GL_OES_texture_view");
  67 #endif
  68
  69         /* build a 2d array texture; no mip levels */
  70         glGenTextures(1, &tex);
  71         glBindTexture(GL_TEXTURE_2D_ARRAY, tex);
  72         glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1,
  73                        GL_RGBA8, TEX_SIZE, TEX_SIZE, NUM_LAYERS);
  74
  75         for (i=0; i < NUM_LAYERS; i++) {
  76                 GLubyte *pixels = create_solid_image(TEX_SIZE, TEX_SIZE, 1, 4, i);
  77                 if (!pixels) {
  78                         printf("Allocation failure for layer %d\n", i);
  79                         piglit_report_result(PIGLIT_FAIL);
  80                 }
  81                 glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0,
  82                                 0, 0, i, TEX_SIZE, TEX_SIZE, 1,
  83                                 GL_RGBA, GL_UNSIGNED_BYTE, pixels);
  84                 free(pixels);
  85         }
  86
  87         /* create a view to a subset of the layers */
  88         glGenTextures(1, &view);
  89         glTextureView(view, GL_TEXTURE_2D_ARRAY, tex, GL_RGBA8,
  90                       0, 1, VIEW_MIN_LAYER, VIEW_NUM_LAYERS);
  91
  92         if (!piglit_check_gl_error(GL_NO_ERROR))
  93                 piglit_report_result(PIGLIT_FAIL);
  94
  95         /* set up for rendering into the view */
  96         glGenFramebuffers(1, &fbo);
  97         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
  98         glFramebufferTexture(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, view, 0);
  99         if (glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
 100                 piglit_report_result(PIGLIT_FAIL);
 101         glViewport(0, 0, TEX_SIZE, TEX_SIZE);
 102
 103
 104         /* clear all the attached layers */
 105         glClearColor(Colors[NUM_LAYERS][0] / 255.0f,
 106                      Colors[NUM_LAYERS][1] / 255.0f,
 107                      Colors[NUM_LAYERS][2] / 255.0f,
 108                      Colors[NUM_LAYERS][3] / 255.0f);
 109         glClear(GL_COLOR_BUFFER_BIT);
 110
 111         if (!piglit_check_gl_error(GL_NO_ERROR))
 112                 piglit_report_result(PIGLIT_FAIL);
 113
 114         /* bind the underlying texture and readback */
 115         glBindTexture(GL_TEXTURE_2D_ARRAY, tex);
 116         for (i = 0; i < NUM_LAYERS; i++) {
 117                 /* the layers inside the view should have been replaced.
 118                  * everything else should be untouched.
 119                  */
 120
 121                 float expected_color[4];
 122                 int color_index = i;
 123                 if (i >= VIEW_MIN_LAYER && i < VIEW_MIN_LAYER + VIEW_NUM_LAYERS) {
 124                         color_index = NUM_LAYERS;
 125                 }
 126
 127                 printf("Testing layer %d\n", i);
 128
 129                 for (j = 0; j < 4; j++)
 130                         expected_color[j] = Colors[color_index][j] / 255.0f;
 131
 132                 pass = piglit_probe_texel_volume_rgba(GL_TEXTURE_2D_ARRAY, 0,
 133                                                       0, 0, i,
 134                                                       TEX_SIZE, TEX_SIZE, 1,
 135                                                       expected_color) && pass;
 136         }
 137
 138         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 139 }