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/*
* Copyright © 2009 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*/
/** @file draw-elements-base-vertex.c
* Tests ARB_draw_elements_base_vertex functionality by drawing a series of
* pairs of quads using different base vertices, using the same vertex and
* index buffers.
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
300 /*window_width*/,
300 /*window_height*/,
GLUT_RGB | GLUT_DOUBLE)
#define NUM_QUADS 10
static uintptr_t ib_offset;
void
piglit_init(int argc, char **argv)
{
GLfloat *vb;
GLuint *ib;
GLuint vbo;
GLboolean user_va = GL_FALSE;
int i;
for (i = 1; i < argc; i++) {
if (!strcmp(argv[i], "user_varrays")) {
user_va = GL_TRUE;
puts("Testing user vertex arrays.");
}
}
if (!user_va)
piglit_require_extension("GL_ARB_vertex_buffer_object");
piglit_require_extension("GL_ARB_draw_elements_base_vertex");
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
if (!user_va) {
glGenBuffersARB(1, &vbo);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, vbo);
glBufferDataARB(GL_ARRAY_BUFFER_ARB,
NUM_QUADS * 8 * sizeof(GLfloat) +
2 * 4 * sizeof(GLuint),
NULL, GL_DYNAMIC_DRAW);
vb = glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
} else {
vb = malloc(NUM_QUADS * 8 * sizeof(GLfloat) +
2 * 4 * sizeof(GLuint));
}
for (i = 0; i < NUM_QUADS; i++) {
float x1 = 10;
float y1 = 10 + i * 20;
float x2 = 20;
float y2 = 20 + i * 20;
vb[i * 8 + 0] = x1; vb[i * 8 + 1] = y1;
vb[i * 8 + 2] = x2; vb[i * 8 + 3] = y1;
vb[i * 8 + 4] = x2; vb[i * 8 + 5] = y2;
vb[i * 8 + 6] = x1; vb[i * 8 + 7] = y2;
}
ib_offset = NUM_QUADS * 8 * sizeof(GLfloat);
ib = (GLuint *)((char *)vb + ib_offset);
for (i = 0; i < 8; i++)
ib[i] = i;
if (user_va) {
ib_offset = (uintptr_t)ib;
} else {
glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, vbo);
}
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(2, GL_FLOAT, 0, user_va ? vb : NULL);
}
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
float white[3] = {1.0, 1.0, 1.0};
float clear[3] = {0.0, 0.0, 0.0};
int i, j;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3fv(white);
/* Draw columns with each successive pair of the quads. */
for (i = 0; i < NUM_QUADS - 1; i++) {
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0, piglit_width, 0, piglit_height, -1, 1);
glTranslatef(i * 20, 0, 0);
glDrawElementsBaseVertex(GL_QUADS, 8, GL_UNSIGNED_INT,
(void *)(uintptr_t)ib_offset, i * 4);
glPopMatrix();
}
for (i = 0; i < NUM_QUADS - 1; i++) {
for (j = 0; j < NUM_QUADS; j++) {
float *expected;
int x = 15 + i * 20;
int y = 15 + j * 20;
if (j == i || j == i + 1)
expected = white;
else
expected = clear;
pass = piglit_probe_pixel_rgb(x, y, expected) && pass;
}
}
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
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