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/*
* Copyright © 2010 Marek Olšák <maraeo@gmail.com>
*
* 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:
* Marek Olšák <maraeo@gmail.com>
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
320 /*window_width*/,
80 /*window_height*/,
GLUT_RGB | GLUT_DOUBLE)
GLboolean user_va = GL_FALSE;
void piglit_init(int argc, char **argv)
{
unsigned i;
for (i = 1; i < argc; i++) {
if (!strcmp(argv[i], "user_varrays")) {
user_va = GL_TRUE;
puts("Testing user vertex arrays.");
}
}
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
if (piglit_get_gl_version() < 15) {
printf("Requires OpenGL 1.5\n");
piglit_report_result(PIGLIT_SKIP);
}
piglit_require_extension("GL_ARB_draw_elements_base_vertex");
glShadeModel(GL_FLAT);
glClearColor(0.2, 0.2, 0.2, 1.0);
}
static GLuint vboVertexPointer(GLint size, GLenum type, GLsizei stride,
const GLvoid *buf, GLsizei bufSize, intptr_t bufOffset)
{
GLuint id;
if (user_va) {
glVertexPointer(size, type, stride, (char*)buf + bufOffset);
return 0;
}
glGenBuffers(1, &id);
glBindBuffer(GL_ARRAY_BUFFER, id);
glBufferData(GL_ARRAY_BUFFER, bufSize, buf, GL_STATIC_DRAW);
glVertexPointer(size, type, stride, (void*)bufOffset);
return id;
}
static GLuint vboElementPointer(const GLvoid *buf, GLsizei bufSize)
{
GLuint id;
if (user_va) {
return 0;
}
glGenBuffers(1, &id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, id);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, bufSize, buf, GL_STATIC_DRAW);
return id;
}
static void test_negative_index_offset(float x1, float y1, float x2, float y2, int index)
{
float v2[] = {
x1, y1,
x1, y2,
x2, y1
};
int indices[] = {
index, index+1, index+2
};
GLuint vbo, ib;
vbo = vboVertexPointer(2, GL_FLOAT, 0, v2, sizeof(v2), 0);
ib = vboElementPointer(indices, sizeof(indices));
glDrawElementsBaseVertex(GL_TRIANGLES, 3, GL_UNSIGNED_INT, user_va ? indices : NULL, -index);
if (vbo)
glDeleteBuffers(1, &vbo);
if (ib)
glDeleteBuffers(1, &ib);
}
enum piglit_result piglit_display(void)
{
GLboolean pass = GL_TRUE;
unsigned i;
float x = 0, y = 0;
float expected[] = {1,1,1};
glClear(GL_COLOR_BUFFER_BIT);
glEnableClientState(GL_VERTEX_ARRAY);
for (i = 0; i < 63; i++) {
int index = (int)pow(i, 5.2)+1;
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
printf("BaseVertex = -%i\n", index);
test_negative_index_offset(x, y, x+20, y+20, index);
assert(glGetError() == 0);
pass = piglit_probe_pixel_rgb(x+5, y+5, expected) && pass;
x += 20;
if (x > 300) {
x = 0;
y += 20;
}
}
glFinish();
glutSwapBuffers();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
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