tests/spec/nv_conditional_render/blitframebuffer.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  * Copyright © 2011 Marek Olšák <maraeo@gmail.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22  * IN THE SOFTWARE.
  23  */
  24
  25 #include "piglit-util-gl.h"
  26
  27 /**
  28  * @file blitframebuffer.c
  29  *
  30  * Tests that conditional rendering also affects glBlitFramebuffer().
  31  *
  32  * It is clarified on page 679 of OpenGL 4.4 spec:
  33  *    "Added BlitFramebuffer to commands affected by conditional rendering in
  34  *     section 10.10 (Bug 9562)."
  35  */
  36
  37 PIGLIT_GL_TEST_CONFIG_BEGIN
  38
  39         config.supports_gl_compat_version = 10;
  40         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  41         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  42
  43 PIGLIT_GL_TEST_CONFIG_END
  44
  45 static void fill_tex(int level, int w, int h, const GLfloat *color)
  46 {
  47         GLfloat *data;
  48         int i;
  49
  50         data = malloc(w * h * 4 * sizeof(GLfloat));
  51         for (i = 0; i < 4 * w * h; i += 4) {
  52                 data[i + 0] = color[0];
  53                 data[i + 1] = color[1];
  54                 data[i + 2] = color[2];
  55                 data[i + 3] = color[3];
  56         }
  57         glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, w, h, 0,
  58                      GL_RGBA, GL_FLOAT, data);
  59         free(data);
  60 }
  61
  62 static void blit_window_to_tex(GLuint tex, int w, int h)
  63 {
  64         GLuint fb;
  65
  66         glGenFramebuffersEXT(1, &fb);
  67         glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, fb);
  68         glFramebufferTexture2DEXT(GL_DRAW_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, tex, 0);
  69
  70         assert(glCheckFramebufferStatusEXT(GL_DRAW_FRAMEBUFFER_EXT) == GL_FRAMEBUFFER_COMPLETE_EXT);
  71
  72         glBlitFramebufferEXT(0, h, w, 2 * h, 0, 0, w, h, GL_COLOR_BUFFER_BIT, GL_LINEAR);
  73
  74         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
  75         glDeleteFramebuffersEXT(1, &fb);
  76 }
  77
  78 enum piglit_result
  79 piglit_display(void)
  80 {
  81         bool pass = true;
  82         float green[4] = {0.0, 1.0, 0.0, 0.0};
  83         GLuint q, texture;
  84
  85         glClearColor(0.5, 0.5, 0.5, 0.5);
  86         glClear(GL_COLOR_BUFFER_BIT);
  87
  88         /* Draw bottom half of window to green. */
  89         glColor4fv(green);
  90         piglit_draw_rect(-1, -1, 2, 1);
  91         glColor4f(1, 1, 1, 1);
  92
  93         /* Set up a green texture. */
  94         glGenTextures(1, &texture);
  95         glBindTexture(GL_TEXTURE_2D, texture);
  96
  97         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
  98         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
  99         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 100         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 101                         GL_LINEAR_MIPMAP_NEAREST);
 102         glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
 103
 104         fill_tex(0, piglit_width, piglit_height / 2, green);
 105
 106         glGenQueries(1, &q);
 107
 108         /* Generate query fail. */
 109         glBeginQuery(GL_SAMPLES_PASSED, q);
 110         glEndQuery(GL_SAMPLES_PASSED);
 111
 112         /* BlitFramebuffer() should be affected by conditional rendering. */
 113         glBeginConditionalRenderNV(q, GL_QUERY_WAIT_NV);
 114         /* Blit top half of the window to texture. */
 115         blit_window_to_tex(texture, piglit_width, piglit_height / 2);
 116         glEndConditionalRenderNV();
 117
 118         /* Draw the texture to top half of the window. */
 119         glEnable(GL_TEXTURE_2D);
 120         piglit_draw_rect_tex(-1, 0, 2, 1,
 121                              0, 0, 1, 1);
 122         glDisable(GL_TEXTURE_2D);
 123
 124         pass = piglit_probe_rect_rgba(0, piglit_width / 2,
 125                                       piglit_width, piglit_height / 2,
 126                                       green);
 127
 128         piglit_present_results();
 129
 130         glDeleteQueries(1, &q);
 131
 132         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 133 }
 134
 135 void
 136 piglit_init(int argc, char **argv)
 137 {
 138         piglit_require_gl_version(20);
 139
 140         piglit_require_extension("GL_NV_conditional_render");
 141         piglit_require_extension("GL_EXT_framebuffer_object");
 142         piglit_require_extension("GL_EXT_framebuffer_blit");
 143 }