enum piglit_result
piglit_display(void)
{
GLint max_clip_planes, max_clip_distances, expected_value;
GLint test_distances, test_in_vs;
float green[] = { 0.0, 1.0, 0.0, 1.0 };
GLint loc;
enum piglit_result result = PIGLIT_PASS;
glGetIntegerv(GL_MAX_CLIP_PLANES, &max_clip_planes);
printf("GL_MAX_CLIP_PLANES = %d\n", max_clip_planes);
glGetIntegerv(GL_MAX_CLIP_DISTANCES, &max_clip_distances);
printf("GL_MAX_CLIP_DISTANCES = %d\n", max_clip_distances);
if (max_clip_planes != max_clip_distances) {
printf("GL_MAX_CLIP_PLANES != GL_MAX_CLIP_DISTANCES\n");
piglit_report_result(PIGLIT_FAIL);
}
if (max_clip_distances < 8) {
printf("GL_MAX_CLIP_DISTANCES < 8\n");
piglit_report_result(PIGLIT_FAIL);
}
expected_value = max_clip_distances;
loc = piglit_GetUniformLocation(prog, "expected_value");
piglit_Uniform1i(loc, expected_value);
for (test_distances = 0; test_distances <= 1; ++test_distances) {
loc = piglit_GetUniformLocation(prog, "test_distances");
piglit_Uniform1i(loc, test_distances);
for (test_in_vs = 0; test_in_vs <= 1; ++test_in_vs) {
bool pass;
loc = piglit_GetUniformLocation(prog, "test_in_vs");
piglit_Uniform1i(loc, test_in_vs);
piglit_draw_rect(-1, -1, 2, 2);
pass = piglit_probe_rect_rgba(0, 0, piglit_width,
piglit_height, green);
printf("Checking that gl_MaxClip%s == %d in %s: %s\n",
test_distances ? "Distances" : "Planes",
expected_value,
test_in_vs ? "VS" : "FS",
pass ? "pass" : "fail");
if (!pass) {
result = PIGLIT_FAIL;
}
}
}
return result;
}
void
piglit_init(int argc, char **argv)
{
int vs, fs, prog;
int tex_location;
piglit_require_GLSL_version(130);
glActiveTexture(GL_TEXTURE0);
piglit_rgbw_texture(GL_RGBA, tex_size, tex_size / 2, true, false,
GL_UNSIGNED_NORMALIZED);
piglit_ortho_projection(piglit_width, piglit_height, false);
vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vert);
fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, frag);
prog = piglit_link_simple_program(vs, fs);
tex_location = piglit_GetUniformLocation(prog, "tex");
lod_location = piglit_GetUniformLocation(prog, "lod");
pos_location = piglit_GetUniformLocation(prog, "pos");
piglit_UseProgram(prog);
piglit_Uniform1i(tex_location, 0);
}
void
piglit_init(int argc, char **argv)
{
int prog;
int tex_location;
int i;
enum shader_target test_stage = UNKNOWN;
bool sampler_found = false;
for (i = 1; i < argc; i++) {
if (test_stage == UNKNOWN) {
/* Maybe it's the shader stage? */
if (strcmp(argv[i], "vs") == 0) {
test_stage = VS;
continue;
} else if (strcmp(argv[i], "fs") == 0) {
test_stage = FS;
continue;
}
}
if (strcmp(argv[i], "140") == 0) {
shader_version = 140;
continue;
}
/* Maybe it's the sampler type? */
if (!sampler_found && (sampler_found = select_sampler(argv[i])))
continue;
fail_and_show_usage();
}
if (test_stage == UNKNOWN || !sampler_found)
fail_and_show_usage();
/* Not implemented yet */
assert(sampler.target != GL_TEXTURE_CUBE_MAP_ARRAY);
require_GL_features(test_stage);
prog = generate_GLSL(test_stage);
if (!prog)
piglit_report_result(PIGLIT_FAIL);
tex_location = piglit_GetUniformLocation(prog, "tex");
lod_location = piglit_GetUniformLocation(prog, "lod");
vertex_location = piglit_GetAttribLocation(prog, "vertex");
piglit_UseProgram(prog);
piglit_Uniform1i(tex_location, 0);
/* Create textures and set miplevel info */
set_base_size();
compute_miplevel_info();
generate_texture();
}
enum piglit_result
piglit_display(void)
{
int l, q;
bool pass = true;
float red[4] = {1.0, 0.0, 0.0, 1.0};
float blue[4] = {0.0, 0.0, 1.0, 1.0};
float black[4] = {0.0, 0.0, 0.0, 1.0};
glClearColor(0.5, 0.5, 0.5, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
for (l = 0; (tex_size >> l) > 0; l++) {
const int width = tex_size >> l;
const int height = max(width / 2, 1);
const int y = 10 + 20 * l;
piglit_Uniform1i(lod_location, l);
/* Draw 4 squares with a color sample for each quad */
for (q = 0; q < 4; q++) {
const int tex_x = (q / 2) * ((width / 2));
const int tex_y = (q % 2) * ((height / 2));
float *c = black;
const int x = 10+20*q;
/* fancy stuff - we should see red and blue
due to the offset for 3 levels,
otherwise we get lots of black border color */
if (l < 3) {
if (q == 2) c = red;
else if (q == 3) c = blue;
} else if (l == 3)
if (q == 2) c = blue;
piglit_Uniform2i(pos_location, tex_x, tex_y);
piglit_draw_rect(x, y, 10, 10);
if (width > 2) /* below 1 wide no test */
pass &= piglit_probe_rect_rgba(x, y, 10, 10, c);
}
}
glutSwapBuffers();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
enum piglit_result
piglit_display()
{
bool pass = true;
int i, l;
const int size = sampler_size();
static const float verts[] = {
-1, -1,
-1, 1,
1, 1,
1, -1,
};
glClearColor(0.5, 0.5, 0.5, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glVertexAttribPointer(vertex_location, 2, GL_FLOAT, GL_FALSE, 0, verts);
glEnableVertexAttribArray(vertex_location);
/* Draw consecutive squares for each mipmap level */
for (l = 0; l < miplevels; l++) {
const int x = 10 + l * 20;
float expected_color[4] = {0, 0, 0, 0};
expected_color[0] = 0.01 * level_size[l][0];
if (sampler.target == GL_TEXTURE_1D_ARRAY) {
expected_color[1] = 0.01 * level_size[l][2];
} else {
for (i = 1; i < size; i++)
expected_color[i] = 0.01 * level_size[l][i];
}
expected_color[3] = 1.0;
piglit_Uniform1i(lod_location, l);
glViewport(x, 10, 10, 10);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
pass &= piglit_probe_rect_rgba(x, 10, 10, 10, expected_color);
}
glDisableVertexAttribArray(vertex_location);
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
static void
create_frag_shader(void)
{
/* This shader samples the currently bound depth texture, then compares
* that value to the current fragment Z value to produce a shade of red
* indicating error/difference.
*
* E.g: gl_FragColor = scale * abs(texture.Z - fragment.Z);
*
* Note that we have to be pretty careful with converting gl_FragCoord
* into a 2D texture coordinate. There's a -0.5 bias and scale factor.
*/
static const char *text_2d =
"uniform sampler2D zTex; \n"
"uniform float sizeScale; \n"
"uniform float errorScale; \n"
"void main() \n"
"{ \n"
" vec2 coord = (gl_FragCoord.xy - vec2(0.5)) / sizeScale; \n"
" vec4 z = texture2D(zTex, coord); \n"
" float diff = errorScale * abs(z.r - gl_FragCoord.z); \n"
" //gl_FragColor = vec4(gl_FragCoord.z, 0, 0, 0); \n"
" //gl_FragColor = z; \n"
" gl_FragColor = vec4(diff, 0, 0, 0); \n"
" gl_FragDepth = gl_FragCoord.z; \n"
"} \n";
static const char *text_rect =
"#extension GL_ARB_texture_rectangle: require \n"
"uniform sampler2DRect zTex; \n"
"uniform float sizeScale; \n"
"uniform float errorScale; \n"
"void main() \n"
"{ \n"
" vec2 coord = gl_FragCoord.xy; \n"
" vec4 z = texture2DRect(zTex, coord); \n"
" float diff = errorScale * abs(z.r - gl_FragCoord.z); \n"
" //gl_FragColor = vec4(gl_FragCoord.z, 0, 0, 0); \n"
" //gl_FragColor = z; \n"
" gl_FragColor = vec4(diff, 0, 0, 0); \n"
" gl_FragDepth = gl_FragCoord.z; \n"
"} \n";
GLuint fs;
GLint zTex, errorScale, sizeScale;
if (TexTarget == GL_TEXTURE_2D)
fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, text_2d);
else
fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, text_rect);
assert(fs);
ShaderProg = piglit_link_simple_program(0, fs);
assert(ShaderProg);
piglit_UseProgram(ShaderProg);
zTex = piglit_GetUniformLocation(ShaderProg, "zTex");
piglit_Uniform1i(zTex, 0); /* unit 0 */
errorScale = piglit_GetUniformLocation(ShaderProg, "errorScale");
piglit_Uniform1f(errorScale, ErrorScale);
sizeScale = piglit_GetUniformLocation(ShaderProg, "sizeScale");
piglit_Uniform1f(sizeScale, (float) (SIZE - 1));
piglit_UseProgram(0);
}