enum piglit_result piglit_display(void)
{
static const char *frag_src =
"!!ARBfp1.0\n"
"TEX result.color, fragment.texcoord[0], texture[0], 2D;\n"
"END";
static const struct
{
int x;
int y;
float color[3];
}
expected[] =
{
{ 64, 240, {0.1f, 0.1f, 0.1f}},
{ 192, 240, {0.3f, 0.3f, 0.3f}},
{ 320, 240, {0.5f, 0.5f, 0.5f}},
{ 448, 240, {0.7f, 0.7f, 0.7f}},
{ 576, 240, {0.9f, 0.9f, 0.9f}},
};
GLuint fbo, frag, db_tex, cb_tex;
GLboolean pass = GL_TRUE;
char *tex_data;
unsigned int i;
frag = piglit_compile_program(GL_FRAGMENT_PROGRAM_ARB, frag_src);
glGenFramebuffersEXT(1, &fbo);
glGenTextures(1, &cb_tex);
glGenTextures(1, &db_tex);
tex_data = calloc(piglit_width * piglit_height, 4);
glBindTexture(GL_TEXTURE_2D, db_tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, piglit_width, piglit_height,
0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, tex_data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glBindTexture(GL_TEXTURE_2D, cb_tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, piglit_width, piglit_height,
0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, tex_data);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
free(tex_data);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, db_tex, 0);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, cb_tex, 0);
check_fbo_status();
glViewport(0, 0, piglit_width, piglit_height);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_ALWAYS);
glDepthMask(GL_TRUE);
/* Draw with the texture to make sure a sampler view is created for
* it before it's used as depth buffer by the FBO. */
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glBindTexture(GL_TEXTURE_2D, db_tex);
glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, frag);
glEnable(GL_FRAGMENT_PROGRAM_ARB);
glEnable(GL_TEXTURE_2D);
piglit_draw_rect_tex(-1.0f, -1.0f, 2.0f, 2.0f,
0.0f, 0.0f, 1.0f, 1.0f);
/* Fill the depth buffer with a gradient. */
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
check_fbo_status();
glDisable(GL_FRAGMENT_PROGRAM_ARB);
glDisable(GL_TEXTURE_2D);
glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
glClearDepth(0.5f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(0.0f, 1.0f, 1.0f);
glBegin(GL_TRIANGLE_STRIP);
glVertex3f(-1.0f, -1.0f, -1.0f);
glVertex3f(-1.0f, 1.0f, -1.0f);
glVertex3f( 1.0f, -1.0f, 1.0f);
glVertex3f( 1.0f, 1.0f, 1.0f);
glEnd();
/* Draw the depth texture as greyscale to the backbuffer. */
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glEnable(GL_FRAGMENT_PROGRAM_ARB);
glEnable(GL_TEXTURE_2D);
piglit_draw_rect_tex(-1.0f, -1.0f, 2.0f, 2.0f,
0.0f, 0.0f, 1.0f, 1.0f);
for (i = 0; i < sizeof(expected) / sizeof(*expected); ++i)
{
pass &= piglit_probe_pixel_rgb(expected[i].x, expected[i].y, expected[i].color);
}
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
enum piglit_result
piglit_display(void)
{
static GLenum buffers[] = {GL_COLOR_ATTACHMENT0_EXT, GL_COLOR_ATTACHMENT1_EXT};
static const float red[] = {1.0f, 0.0f, 0.0f};
static const float green[] = {0.0f, 1.0f, 0.0f};
static const float blue[] = {0.0f, 0.0f, 1.0f};
static const struct {
GLsizei buffer_count;
const float *clear_color;
const float *expected_0;
const float *expected_1;
} tests[] = {
{2, red, red, red},
{1, green, green, red},
{2, blue, blue, blue},
};
int w = piglit_width;
int h = piglit_height;
GLuint fbo, tex[2];
unsigned i;
glGenTextures(2, tex);
glBindTexture(GL_TEXTURE_2D, tex[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h,
0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, NULL);
glBindTexture(GL_TEXTURE_2D, tex[1]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h,
0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, NULL);
glGenFramebuffersEXT(1, &fbo);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, tex[0], 0);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT1_EXT,
GL_TEXTURE_2D, tex[1], 0);
check_fbo_status();
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
for (i = 0; i < sizeof(tests) / sizeof(*tests); ++i) {
GLint buffer, expected_buffer;
glDrawBuffersARB(tests[i].buffer_count, buffers);
check_fbo_status();
glGetIntegerv(GL_DRAW_BUFFER1_ARB, &buffer);
expected_buffer = tests[i].buffer_count < 2 ? GL_NONE : GL_COLOR_ATTACHMENT1_EXT;
if (buffer != expected_buffer) {
printf("Unexpected buffer %#x for DRAW_BUFFER1_ARB in test %u, expected %#x.\n",
buffer, i, expected_buffer);
piglit_report_result(PIGLIT_FAIL);
}
glClearColor(tests[i].clear_color[0], tests[i].clear_color[1],
tests[i].clear_color[2], 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
if (!piglit_probe_pixel_rgb(w / 2, h / 2, tests[i].expected_0)) {
printf("Probe failed for test %u, attachment 0.\n", i);
piglit_report_result(PIGLIT_FAIL);
}
glReadBuffer(GL_COLOR_ATTACHMENT1_EXT);
if (!piglit_probe_pixel_rgb(w / 2, h / 2, tests[i].expected_1)) {
printf("Probe failed for test %u, attachment 1.\n", i);
piglit_report_result(PIGLIT_FAIL);
}
}
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
return PIGLIT_PASS;
}
