tests/spec/arb_texture_view/clear-into-view-2d-array.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-2d-array.c
  28  * This tests that glClear() into a layer of a 2D array view (with nonzero MinLayer)
  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_compat_version = 30;
  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 CLEAR_LAYER 1
  54 #define TEX_SIZE 64
  55
  56 void
  57 piglit_init(int argc, char **argv)
  58 {
  59         GLuint tex, view;
  60         GLuint fbo;
  61         int i, j;
  62         bool pass = true;
  63
  64 #ifdef PIGLIT_USE_OPENGL
  65         piglit_require_extension("GL_ARB_texture_view");
  66 #else
  67         piglit_require_extension("GL_OES_texture_view");
  68 #endif
  69
  70         /* build a 2d array texture; no mip levels */
  71         glGenTextures(1, &tex);
  72         glBindTexture(GL_TEXTURE_2D_ARRAY, tex);
  73         glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1,
  74                 GL_RGBA8, TEX_SIZE, TEX_SIZE, NUM_LAYERS);
  75
  76         for (i=0; i < NUM_LAYERS; i++) {
  77                 GLubyte *pixels = create_solid_image(TEX_SIZE, TEX_SIZE, 1, 4, i);
  78                 if (!pixels) {
  79                         printf("Allocation failure for layer %d\n", i);
  80                         piglit_report_result(PIGLIT_FAIL);
  81                 }
  82                 glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0,
  83                                 0, 0, i, TEX_SIZE, TEX_SIZE, 1,
  84                                 GL_RGBA, GL_UNSIGNED_BYTE, pixels);
  85                 free(pixels);
  86         }
  87
  88         /* create a view to a subset of the layers */
  89         glGenTextures(1, &view);
  90         glTextureView(view, GL_TEXTURE_2D_ARRAY, tex, GL_RGBA8,
  91                       0, 1, VIEW_MIN_LAYER, VIEW_NUM_LAYERS);
  92
  93         if (!piglit_check_gl_error(GL_NO_ERROR))
  94                 piglit_report_result(PIGLIT_FAIL);
  95
  96         /* set up for rendering into the view.
  97          * we attach just the middle layer of the view, to exercise both minlayer
  98          * and the attachment's layer index.
  99          */
 100         glGenFramebuffers(1, &fbo);
 101         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 102         glFramebufferTextureLayer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 103                                   view, 0, CLEAR_LAYER);
 104         if (glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
 105                 piglit_report_result(PIGLIT_FAIL);
 106         glViewport(0, 0, TEX_SIZE, TEX_SIZE);
 107
 108         /* clear through the view */
 109         glClearColor(Colors[NUM_LAYERS][0] / 255.0f,
 110                      Colors[NUM_LAYERS][1] / 255.0f,
 111                      Colors[NUM_LAYERS][2] / 255.0f,
 112                      Colors[NUM_LAYERS][3] / 255.0f);
 113         glClear(GL_COLOR_BUFFER_BIT);
 114
 115         if (!piglit_check_gl_error(GL_NO_ERROR))
 116                 piglit_report_result(PIGLIT_FAIL);
 117
 118         /* bind the underlying texture and readback */
 119         glBindTexture(GL_TEXTURE_2D_ARRAY, tex);
 120         for (i = 0; i < NUM_LAYERS; i++) {
 121                 /* the layer we cleared should have been replaced;
 122                  * everything else should be untouched.
 123                  */
 124
 125                 int color_index = (i == VIEW_MIN_LAYER + CLEAR_LAYER) ? NUM_LAYERS : i;
 126                 float expected_color[4];
 127
 128                 printf("Testing layer %d\n", i);
 129
 130                 for (j = 0; j < 4; j++)
 131                         expected_color[j] = Colors[color_index][j] / 255.0f;
 132
 133                 pass = piglit_probe_texel_volume_rgba(GL_TEXTURE_2D_ARRAY, 0,
 134                                                       0, 0, i,
 135                                                       TEX_SIZE, TEX_SIZE, 1,
 136                                                       expected_color) && pass;
 137         }
 138
 139         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 140 }