void sphere_texturing(t_obj *obj, t_3d_pos *ray,
double alpha, t_mat *mat)
{
double x;
double y;
int height;
int width;
t_3d_pos hit;
x = alpha;
if (obj->sphe.texture != NULL)
{
hit = find_hit(alpha, &ray[0], &ray[1]);
height = (obj->sphe.texture->clipable.clip_height) * obj->sphe.y_repeat;
width = (obj->sphe.texture->clipable.clip_width) * obj->sphe.x_repeat;
x = width * (0.5 - (atan2(hit.z - CZ, hit.x - CX) / M_PI));
y = height * (0.5 - (asin((hit.y - CY) / obj->sphe.rad) / M_PI));
mat->color.full = get_texture_color(obj->sphe.texture, x, y);
}
}
/** \return GL_TRUE for pass, GL_FALSE for fail */
static GLboolean
test_format(const struct format_info *info)
{
const int comps = num_components(info->BaseFormat);
const int texels = TexWidth * TexHeight;
const int w = piglit_width / 10;
const int h = piglit_height / 10;
GLfloat expected[4];
void *image;
float value[4];
GLint f;
GLenum userFormat;
int p;
if ((info->BaseFormat == GL_RED ||
info->BaseFormat == GL_RG) && !HaveRG) {
/* skip it */
return GL_TRUE;
}
/*printf("Testing %s\n", info->Name);*/
get_texture_color(value);
/* alloc, fill texture image */
image = malloc(comps * texels * sizeof(GLfloat));
fill_array(comps, texels, image, value);
/* GL_INTENSITY is not a legal src format */
userFormat = info->BaseFormat == GL_INTENSITY ? GL_LUMINANCE : info->BaseFormat;
glTexImage2D(GL_TEXTURE_2D, 0, info->IntFormat, TexWidth, TexHeight, 0,
userFormat, GL_FLOAT, image);
free(image);
if (check_error(__FILE__, __LINE__))
return GL_FALSE;
/* check internal format */
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &f);
if (f != info->IntFormat) {
printf("%s: GL_TEXTURE_INTERNAL_FORMAT query failed for 0x%x\n",
TestName,
info->IntFormat);
return GL_FALSE;
}
/* check texture datatype info */
{
static const GLenum queries[] = {
GL_TEXTURE_RED_TYPE_ARB,
GL_TEXTURE_GREEN_TYPE_ARB,
GL_TEXTURE_BLUE_TYPE_ARB,
GL_TEXTURE_ALPHA_TYPE_ARB,
GL_TEXTURE_LUMINANCE_TYPE_ARB,
GL_TEXTURE_INTENSITY_TYPE_ARB,
GL_TEXTURE_DEPTH_TYPE_ARB
};
static const char *queryNames[] = {
"GL_TEXTURE_RED_TYPE_ARB",
"GL_TEXTURE_GREEN_TYPE_ARB",
"GL_TEXTURE_BLUE_TYPE_ARB",
"GL_TEXTURE_ALPHA_TYPE_ARB",
"GL_TEXTURE_LUMINANCE_TYPE_ARB",
"GL_TEXTURE_INTENSITY_TYPE_ARB",
"GL_TEXTURE_DEPTH_TYPE_ARB"
};
int i;
for (i = 0; i < ARRAY_SIZE(queries); i++) {
GLint type = 1;
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, queries[i], &type);
if (check_error(__FILE__, __LINE__))
return GL_FALSE;
if (type != GL_NONE && type != GL_FLOAT) {
printf("%s: %s query failed (returned 0x%x)\n",
TestName, queryNames[i], type);
return GL_FALSE;
}
}
}
/* compute expected color */
switch (info->BaseFormat) {
case GL_RGBA:
expected[0] = scale_and_bias(value[0]);
expected[1] = scale_and_bias(value[1]);
expected[2] = scale_and_bias(value[2]);
expected[3] = scale_and_bias(value[3]);
break;
case GL_RGB:
expected[0] = scale_and_bias(value[0]);
expected[1] = scale_and_bias(value[1]);
expected[2] = scale_and_bias(value[2]);
expected[3] = scale_and_bias(1.0);
break;
case GL_ALPHA:
expected[0] =
expected[1] =
expected[2] = scale_and_bias(0.0);
expected[3] = scale_and_bias(value[0]);
break;
case GL_LUMINANCE:
expected[0] =
expected[1] =
expected[2] = scale_and_bias(value[0]);
expected[3] = scale_and_bias(1.0);
break;
case GL_INTENSITY:
expected[0] =
expected[1] =
expected[2] =
expected[3] = scale_and_bias(value[0]);
break;
case GL_LUMINANCE_ALPHA:
expected[0] =
expected[1] =
expected[2] = scale_and_bias(value[0]);
expected[3] = scale_and_bias(value[1]);
break;
case GL_RED:
expected[0] = scale_and_bias(value[0]);
expected[1] = scale_and_bias(0.0);
expected[2] = scale_and_bias(0.0);
expected[3] = scale_and_bias(1.0);
break;
case GL_RG:
expected[0] = scale_and_bias(value[0]);
expected[1] = scale_and_bias(value[1]);
expected[2] = scale_and_bias(0.0);
expected[3] = scale_and_bias(1.0);
break;
default:
abort();
}
/* draw */
glClearColor(0.5, 0.5, 0.5, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_POLYGON);
glTexCoord2f(0, 0);
glVertex2f(0, 0);
glTexCoord2f(1, 0);
glVertex2f(w, 0);
glTexCoord2f(1, 1);
glVertex2f(w, h);
glTexCoord2f(0, 1);
glVertex2f(0, h);
glEnd();
/* test */
p = piglit_probe_pixel_rgba(w/2, h/2, expected);
if (!p) {
int i;
printf(" Failed with format %s:\n", info->Name);
printf(" Texture color = ");
for (i = 0; i < comps; i++) {
printf("%f", value[i]);
if (i + 1 < comps)
printf(", ");
}
printf("\n");
}
glutSwapBuffers();
return p;
}
