tests/spec/ext_transform_feedback/separate.c

   1 /*
   2  * Copyright © 2011 Marek Olšák <maraeo@gmail.com>
   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  * EXT_transform_feedback test.
  26  *
  27  * Test writing separate vertex attribs into a buffer object.
  28  */
  29
  30 #include "piglit-util-gl.h"
  31
  32 PIGLIT_GL_TEST_CONFIG_BEGIN
  33
  34         config.supports_gl_compat_version = 10;
  35         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  36         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  37
  38 PIGLIT_GL_TEST_CONFIG_END
  39
  40 static const char *vstext = {
  41         "varying vec3 v3;"
  42         "varying vec2 v2;"
  43         "void main() {"
  44         "  gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;"
  45         "  gl_FrontColor = vec4(1.0, 0.9, 0.8, 0.7);"
  46         "  gl_TexCoord[0] = vec4(0.5);"
  47         "  gl_TexCoord[1] = vec4(0.6, 0.0, 0.1, 0.6);"
  48         "  v2 = vec2(0.2, 0.7);"
  49         "  v3 = vec3(0.55, 0.66, 0.77);"
  50         "}"
  51 };
  52
  53 static const char *varyings[] = {"v3", "gl_FrontColor", "v2", "gl_TexCoord[1]"};
  54 GLuint buf[4];
  55 GLuint prog;
  56
  57 #define NUM_OUT_VERTICES 6
  58
  59 void piglit_init(int argc, char **argv)
  60 {
  61         GLuint vs;
  62         GLint maxcomps, maxattrs;
  63         unsigned i;
  64
  65         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
  66
  67         /* Check the driver. */
  68         piglit_require_gl_version(15);
  69         piglit_require_GLSL();
  70         piglit_require_transform_feedback();
  71
  72         glGetIntegerv(GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS_EXT, &maxattrs);
  73         if (maxattrs < 4) {
  74                 fprintf(stderr, "Not enough separate attribs supported by transform feedback.\n");
  75                 piglit_report_result(PIGLIT_SKIP);
  76         }
  77         glGetIntegerv(GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS_EXT, &maxcomps);
  78         if (maxcomps < 4) {
  79                 fprintf(stderr, "Not enough separate components supported by transform feedback.\n");
  80                 piglit_report_result(PIGLIT_SKIP);
  81         }
  82
  83         /* Create shaders. */
  84         vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vstext);
  85         prog = glCreateProgram();
  86         glAttachShader(prog, vs);
  87         glTransformFeedbackVaryings(prog, sizeof(varyings)/sizeof(varyings[0]),
  88                                     varyings, GL_SEPARATE_ATTRIBS_EXT);
  89         glLinkProgram(prog);
  90         if (!piglit_link_check_status(prog)) {
  91                 glDeleteProgram(prog);
  92                 piglit_report_result(PIGLIT_FAIL);
  93         }
  94
  95         /* Set up the transform feedback buffer. */
  96         glGenBuffers(4, buf);
  97         for (i = 0; i < 4; i++) {
  98                 unsigned j;
  99                 float *ptr;
 100                 glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER_EXT, buf[i]);
 101                 glBufferData(GL_TRANSFORM_FEEDBACK_BUFFER_EXT,
 102                              NUM_OUT_VERTICES*4*sizeof(float), NULL, GL_STREAM_READ);
 103                 ptr = glMapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER_EXT, GL_WRITE_ONLY);
 104                 for (j = 0; j < NUM_OUT_VERTICES*4; j++) {
 105                         ptr[j] = 0.123456;
 106                 }
 107                 glUnmapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER_EXT);
 108                 glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER_EXT, i, buf[i]);
 109         }
 110
 111         if (!piglit_check_gl_error(GL_NO_ERROR))
 112                 piglit_report_result(PIGLIT_FAIL);
 113
 114         glClearColor(0.2, 0.2, 0.2, 1.0);
 115         glEnableClientState(GL_VERTEX_ARRAY);
 116 }
 117
 118 enum piglit_result piglit_display(void)
 119 {
 120         bool pass = true;
 121         static const float verts[] = {
 122                 10, 10,
 123                 10, 20,
 124                 20, 20,
 125                 20, 10
 126         };
 127         static const float v3[] = {0.55, 0.66, 0.77};
 128         static const float frontcolor[] = {1.0, 0.9, 0.8, 0.7};
 129         static const float v2[] = {0.2, 0.7};
 130         static const float texcoord1[] = {0.6, 0.0, 0.1, 0.6};
 131
 132         glClear(GL_COLOR_BUFFER_BIT);
 133
 134         /* Render into TFBO. */
 135         glLoadIdentity();
 136         glUseProgram(prog);
 137         glEnable(GL_RASTERIZER_DISCARD);
 138         glBeginTransformFeedback(GL_TRIANGLES);
 139         glVertexPointer(2, GL_FLOAT, 0, verts);
 140         glDrawArrays(GL_QUADS, 0, 4);
 141         glEndTransformFeedback();
 142         glDisable(GL_RASTERIZER_DISCARD);
 143
 144         if (!piglit_check_gl_error(GL_NO_ERROR))
 145                 piglit_report_result(PIGLIT_FAIL);
 146
 147         pass = piglit_probe_buffer(buf[0], GL_TRANSFORM_FEEDBACK_BUFFER_EXT,
 148                         "Buffer[0]", NUM_OUT_VERTICES, 3, v3) && pass;
 149         pass = piglit_probe_buffer(buf[1], GL_TRANSFORM_FEEDBACK_BUFFER_EXT,
 150                         "Buffer[1]", NUM_OUT_VERTICES, 4, frontcolor)&& pass;
 151         pass = piglit_probe_buffer(buf[2], GL_TRANSFORM_FEEDBACK_BUFFER_EXT,
 152                         "Buffer[2]", NUM_OUT_VERTICES, 2, v2) && pass;
 153         pass = piglit_probe_buffer(buf[3], GL_TRANSFORM_FEEDBACK_BUFFER_EXT,
 154                         "Buffer[3]", NUM_OUT_VERTICES, 4, texcoord1) && pass;
 155
 156         if (!piglit_check_gl_error(GL_NO_ERROR))
 157                 piglit_report_result(PIGLIT_FAIL);
 158
 159         piglit_present_results();
 160
 161         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 162 }