tests/util/piglit-fbo.cpp

   1 /*
   2  * Copyright © 2013 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
  24 /**
  25  * \file piglit-fbo.cpp
  26  *
  27  * This file defines the functions which can be utilized to develop
  28  * new piglit test cases. These functions initialize a framebuffer
  29  * object based on paramaters passed.
  30  */
  31 #include "piglit-fbo.h"
  32 using namespace piglit_util_fbo;
  33
  34 FboConfig::FboConfig(int num_samples, int width, int height)
  35         : num_samples(num_samples),
  36           num_rb_attachments(1),
  37           num_tex_attachments(0),
  38           width(width),
  39           height(height),
  40           layers(0),
  41           use_rect(num_samples == 0),
  42           attachment_layer(0),
  43           combine_depth_stencil(true),
  44           color_format(GL_RGBA),
  45           color_internalformat(GL_RGBA),
  46           depth_internalformat(GL_DEPTH_COMPONENT24),
  47           stencil_internalformat(GL_STENCIL_INDEX8)
  48 {
  49         memset(rb_attachment, 0, PIGLIT_MAX_COLOR_ATTACHMENTS * sizeof(GLuint));
  50         memset(tex_attachment, 0, PIGLIT_MAX_COLOR_ATTACHMENTS * sizeof(GLuint));
  51
  52         /* Set default values for single renderbuffer and texture attachment. */
  53         rb_attachment[0] = GL_COLOR_ATTACHMENT0;
  54         tex_attachment[0] = GL_COLOR_ATTACHMENT0;
  55 }
  56
  57 Fbo::Fbo()
  58         : config(0, 0, 0), /* will be overwritten on first call to setup() */
  59           handle(0),
  60           depth_rb(0),
  61           stencil_rb(0),
  62           gl_objects_generated(false)
  63 {
  64         memset(color_tex, 0, PIGLIT_MAX_COLOR_ATTACHMENTS * sizeof(GLuint));
  65         memset(color_rb, 0, PIGLIT_MAX_COLOR_ATTACHMENTS * sizeof(GLuint));
  66 }
  67
  68 void
  69 Fbo::generate_gl_objects(void)
  70 {
  71         GLint max_color_attachments;
  72         glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS, &max_color_attachments);
  73         glGenFramebuffers(1, &handle);
  74         glGenTextures(max_color_attachments, color_tex);
  75         glGenRenderbuffers(max_color_attachments, color_rb);
  76         glGenRenderbuffers(1, &depth_rb);
  77         glGenRenderbuffers(1, &stencil_rb);
  78         gl_objects_generated = true;
  79 }
  80
  81 void
  82 Fbo::attach_color_renderbuffer(const FboConfig &config, int index)
  83 {
  84         glBindRenderbuffer(GL_RENDERBUFFER, color_rb[index]);
  85         glRenderbufferStorageMultisample(GL_RENDERBUFFER,
  86                                          config.num_samples,
  87                                          config.color_internalformat,
  88                                          config.width,
  89                                          config.height);
  90         glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER,
  91                                   config.rb_attachment[index],
  92                                   GL_RENDERBUFFER, color_rb[index]);
  93 }
  94
  95 void
  96 Fbo::attach_color_texture(const FboConfig &config, int index)
  97 {
  98         GLenum target = config.use_rect ? GL_TEXTURE_RECTANGLE : GL_TEXTURE_2D;
  99         glBindTexture(target, color_tex[index]);
 100         glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 101         glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 102         glTexImage2D(target,
 103                      0 /* level */,
 104                      config.color_internalformat,
 105                      config.width,
 106                      config.height,
 107                      0 /* border */,
 108                      config.color_format /* format */,
 109                      GL_BYTE /* type */,
 110                      NULL /* data */);
 111         glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER,
 112                                config.tex_attachment[index],
 113                                target,
 114                                color_tex[index],
 115                                0 /* level */);
 116 }
 117
 118 void
 119 Fbo::attach_multisample_color_texture(const FboConfig &config, int index)
 120 {
 121         if (config.layers == 0) {
 122                 glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, color_tex[index]);
 123                 glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE,
 124                                         config.num_samples,
 125                                         config.color_internalformat,
 126                                         config.width,
 127                                         config.height,
 128                                         GL_TRUE /* fixed sample locations */);
 129                 glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER,
 130                                        config.tex_attachment[index],
 131                                        GL_TEXTURE_2D_MULTISAMPLE,
 132                                        color_tex[index],
 133                                        0 /* level */);
 134         } else {
 135                 glBindTexture(GL_TEXTURE_2D_MULTISAMPLE_ARRAY, color_tex[index]);
 136                 glTexImage3DMultisample(GL_TEXTURE_2D_MULTISAMPLE_ARRAY,
 137                                         config.num_samples,
 138                                         config.color_internalformat,
 139                                         config.width,
 140                                         config.height,
 141                                         config.layers,
 142                                         GL_TRUE /* fixed sample locations */);
 143                 glFramebufferTextureLayer(GL_DRAW_FRAMEBUFFER,
 144                                           config.tex_attachment[index],
 145                                           color_tex[index],
 146                                           0 /* level */,
 147                                           config.attachment_layer);
 148         }
 149 }
 150
 151 void
 152 Fbo::set_samples(int num_samples)
 153 {
 154         FboConfig new_config = this->config;
 155         new_config.num_samples = num_samples;
 156         setup(new_config);
 157 }
 158
 159 /**
 160  * Modify the state of the framebuffer object to reflect the state in
 161  * new_config.  if the resulting framebuffer is incomplete, terminate
 162  * the test.
 163  */
 164 void
 165 Fbo::setup(const FboConfig &new_config)
 166 {
 167         GLint max_attachments;
 168         GLint requested_attachments = new_config.num_rb_attachments +
 169                 new_config.num_tex_attachments;
 170         glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS, &max_attachments);
 171
 172         if (requested_attachments > max_attachments) {
 173                 printf("Number of color attachments are not supported by the"
 174                        " implementation.\nattachments requested = %d,"
 175                        " max attachments supported = %d\n",
 176                        requested_attachments, max_attachments);
 177                 piglit_report_result(PIGLIT_SKIP);
 178         }
 179
 180         if (!try_setup(new_config)) {
 181                 printf("Framebuffer not complete\n");
 182                 piglit_report_result(PIGLIT_SKIP);
 183         }
 184 }
 185
 186 /**
 187  * Modify the state of the framebuffer object to reflect the state in
 188  * config.  Return true if the resulting framebuffer is complete,
 189  * false otherwise.
 190  */
 191 bool
 192 Fbo::try_setup(const FboConfig &new_config)
 193 {
 194         this->config = new_config;
 195
 196         if (!gl_objects_generated)
 197                 generate_gl_objects();
 198
 199         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, handle);
 200
 201         /* Color buffer */
 202         if (config.color_internalformat != GL_NONE) {
 203
 204                 /* Attach renderbuffers as color attachments */
 205                 for (int i = 0; i < config.num_rb_attachments; i++)
 206                         attach_color_renderbuffer(new_config, i);
 207
 208                 if (config.num_samples == 0) {
 209
 210                         /* Attach textures as color attachments */
 211                         piglit_require_extension("GL_ARB_texture_rectangle");
 212                         for (int i = 0; i < config.num_tex_attachments; i++)
 213                                 attach_color_texture(new_config, i);
 214
 215                 } else {
 216
 217                         /* Attach multisample textures as color attachments */
 218                         piglit_require_extension("GL_ARB_texture_multisample");
 219                         for (int i = 0; i < config.num_tex_attachments; i++)
 220                                 attach_multisample_color_texture(new_config, i);
 221                 }
 222         }
 223
 224         /* Depth/stencil buffer(s) */
 225         if (config.combine_depth_stencil) {
 226                 glBindRenderbuffer(GL_RENDERBUFFER, depth_rb);
 227                 glRenderbufferStorageMultisample(GL_RENDERBUFFER,
 228                                                  config.num_samples,
 229                                                  GL_DEPTH_STENCIL,
 230                                                  config.width,
 231                                                  config.height);
 232                 glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER,
 233                                           GL_DEPTH_STENCIL_ATTACHMENT,
 234                                           GL_RENDERBUFFER, depth_rb);
 235         } else {
 236                 if (config.stencil_internalformat != GL_NONE) {
 237                         glBindRenderbuffer(GL_RENDERBUFFER, stencil_rb);
 238                         glRenderbufferStorageMultisample(GL_RENDERBUFFER,
 239                                                          config.num_samples,
 240                                                          config.stencil_internalformat,
 241                                                          config.width,
 242                                                          config.height);
 243                         glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER,
 244                                                   GL_STENCIL_ATTACHMENT,
 245                                                   GL_RENDERBUFFER, stencil_rb);
 246                 }
 247
 248                 if (config.depth_internalformat != GL_NONE) {
 249                         glBindRenderbuffer(GL_RENDERBUFFER, depth_rb);
 250                         glRenderbufferStorageMultisample(GL_RENDERBUFFER,
 251                                                          config.num_samples,
 252                                                          config.depth_internalformat,
 253                                                          config.width,
 254                                                          config.height);
 255                         glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER,
 256                                                   GL_DEPTH_ATTACHMENT,
 257                                                   GL_RENDERBUFFER, depth_rb);
 258                 }
 259         }
 260
 261         bool success = glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER)
 262                 == GL_FRAMEBUFFER_COMPLETE;
 263
 264         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
 265
 266         return success;
 267 }
 268
 269 void
 270 Fbo::set_viewport()
 271 {
 272         glViewport(0, 0, config.width, config.height);
 273 }