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/*
* Copyright (c) 2011 VMware, Inc.
*
* 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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
* NON-INFRINGEMENT. IN NO EVENT SHALL VMWARE AND/OR THEIR SUPPLIERS
* 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.
*/
/**
* Tests glPolygonMode.
* Brian Paul
* April 2011
*/
#include "piglit-util.h"
int piglit_width = 500, piglit_height = 100;
int piglit_window_mode = GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE;
static const char *TestName = "polygon-mode";
#define VERTS 16
static const GLfloat Positions[VERTS][2] = {
/* clockwise */
{ 0, -1 },
{ 1, -1 },
{ 1, 1 },
{ 0, 1 },
/* counter-clockwise */
{ 2, -1 },
{ 2, 1 },
{ 3, 1 },
{ 3, -1 },
/* clockwise */
{ 4, -1 },
{ 5, -1 },
{ 5, 1 },
{ 4, 1 },
/* counter-clockwise */
{ 6, -1 },
{ 6, 1 },
{ 7, 1 },
{ 7, -1 }
};
static const GLfloat Colors[VERTS][4] = {
{1, 0, 0, 1},
{1, 0, 0, 1},
{1, 0, 0, 1},
{1, 0, 0, 1},
{0, 1, 0, 1},
{0, 1, 0, 1},
{0, 1, 0, 1},
{0, 1, 0, 1},
{0, 0, 1, 1},
{0, 0, 1, 1},
{0, 0, 1, 1},
{0, 0, 1, 1},
{1, 1, 1, 1},
{1, 1, 1, 1},
{1, 1, 1, 1},
{1, 1, 1, 1}
};
static const char *
get_mode_str(GLenum mode)
{
switch (mode) {
case GL_POINT:
return "GL_POINT";
case GL_LINE:
return "GL_LINE";
case GL_FILL:
return "GL_FILL";
default:
return NULL;
}
}
static GLenum
get_prim_mode(GLenum mode)
{
switch (mode) {
case GL_POINT:
return GL_POINTS;
case GL_LINE:
return GL_LINE_LOOP;
case GL_FILL:
return GL_QUADS;
default:
return 0;
}
}
static GLboolean
test_combo(GLenum frontMode, GLenum backMode)
{
GLenum frontPrim = get_prim_mode(frontMode);
GLenum backPrim = get_prim_mode(backMode);
GLubyte *ref, *test;
GLboolean pass = GL_TRUE;
ref = malloc(piglit_width * piglit_height * 4);
test = malloc(piglit_width * piglit_height * 4);
/* Draw reference image */
glClear(GL_COLOR_BUFFER_BIT);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glDrawArrays(frontPrim, 0, 4);
glDrawArrays(backPrim, 4, 4);
glDrawArrays(frontPrim, 8, 4);
glDrawArrays(backPrim, 12, 4);
glReadPixels(0, 0, piglit_width, piglit_height,
GL_RGBA, GL_UNSIGNED_BYTE, ref);
/* Draw test image */
glClear(GL_COLOR_BUFFER_BIT);
glPolygonMode(GL_FRONT, frontMode);
glPolygonMode(GL_BACK, backMode);
glDrawArrays(GL_QUADS, 0, 16);
glReadPixels(0, 0, piglit_width, piglit_height,
GL_RGBA, GL_UNSIGNED_BYTE, test);
/*
* This assumes that there are generally no rasterization differences
* between the normal rendering paths vs. when glPolygonMode is in effect.
* If that's not true, we'll need a different comparision method.
*/
if (memcmp(ref, test, piglit_width * piglit_height * 4)) {
fprintf(stderr, "%s: glPolygonMode(front=%s, back=%s) failed\n",
TestName, get_mode_str(frontMode), get_mode_str(backMode));
pass = GL_FALSE;
}
glutSwapBuffers();
free(ref);
free(test);
return pass;
}
static GLboolean
test_polygonmode(void)
{
GLenum pass = GL_TRUE;
glVertexPointer(2, GL_FLOAT, 0, Positions);
glColorPointer(4, GL_FLOAT, 0, Colors);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
if (!test_combo(GL_FILL, GL_LINE))
pass = GL_FALSE;
if (!test_combo(GL_FILL, GL_POINT))
pass = GL_FALSE;
if (!test_combo(GL_POINT, GL_LINE))
pass = GL_FALSE;
if (!test_combo(GL_POINT, GL_FILL))
pass = GL_FALSE;
if (!test_combo(GL_LINE, GL_FILL))
pass = GL_FALSE;
if (!test_combo(GL_LINE, GL_POINT))
pass = GL_FALSE;
if (!test_combo(GL_LINE, GL_LINE))
pass = GL_FALSE;
if (!test_combo(GL_POINT, GL_POINT))
pass = GL_FALSE;
return pass;
}
enum piglit_result
piglit_display(void)
{
if (!test_polygonmode())
return PIGLIT_FAILURE;
return PIGLIT_SUCCESS;
}
void
piglit_init(int argc, char **argv)
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-1, 8, -2, 2, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
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