static void DisplayNoDrawInit(void)
{
printf("Setting tile.");
icetResetTiles();
icetAddTile(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0);
icetGLDrawCallback(draw);
icetSetColorFormat(ICET_IMAGE_COLOR_RGBA_UBYTE);
icetSetDepthFormat(ICET_IMAGE_DEPTH_FLOAT);
if (global_rank == 0) {
icetBoundingBoxd(100.0, 101.0, 100.0, 101.0, 100.0, 101.0);
} else {
icetBoundingBoxd(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
}
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-0.5, 0.5, -0.5, 0.5, -0.5, 0.5);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glDisable(GL_LIGHTING);
glColor4d(1.0, 1.0, 1.0, 1.0);
}
static void BackgroundCorrectGetMatrices(IceTDouble *projection_matrix,
IceTDouble *modelview_matrix)
{
IceTDouble scale_matrix[16];
IceTDouble transform_matrix[16];
IceTInt num_proc;
IceTInt rank;
icetGetIntegerv(ICET_NUM_PROCESSES, &num_proc);
icetGetIntegerv(ICET_RANK, &rank);
/* Make the projection really project pixel positions to normalized clipping
coordinates. */
icetMatrixScale(2.0/PROC_REGION_WIDTH,
2.0/(PROC_REGION_HEIGHT*(num_proc+1)),
2.0,
scale_matrix);
icetMatrixTranslate(-1.0, -1.0, -1.0, transform_matrix);
icetMatrixMultiply(projection_matrix, transform_matrix, scale_matrix);
/* The modelview just passes pixel positions. */
icetMatrixIdentity(modelview_matrix);
/* Based on these matrices, set the region we want the local process to draw
pixels. The region is defined in pixels. The previous matrices
transform the pixels to screen coordinates, which should then implicitly
be transformed back to pixel coordinates in the draw function. */
icetBoundingBoxd(0.0,
(IceTDouble)PROC_REGION_WIDTH,
(IceTDouble)rank*PROC_REGION_HEIGHT,
(IceTDouble)(rank+1)*PROC_REGION_HEIGHT,
0.0,
1.0);
}
static int BlankTilesRun()
{
int result = TEST_PASSED;
int strategy_index;
glClearColor(0.25f, 0.25f, 0.25f, 0.25f);
icetGLDrawCallback(draw);
icetBoundingBoxd(-0.5, 0.5, -0.5, 0.5, -0.5, 0.5);
/* Turn on blending and colored background collection. Even though in
general this would not work unless you also ordered the compositing, we
just want to make sure we get the right color in empty tiles for this
test. */
icetSetColorFormat(ICET_IMAGE_COLOR_RGBA_FLOAT);
icetSetDepthFormat(ICET_IMAGE_DEPTH_NONE);
icetCompositeMode(ICET_COMPOSITE_MODE_BLEND);
icetEnable(ICET_CORRECT_COLORED_BACKGROUND);
for (strategy_index = 0;
strategy_index < STRATEGY_LIST_SIZE; strategy_index++) {
IceTEnum strategy = strategy_list[strategy_index];
int single_image_strategy_index;
int num_single_image_strategy;
icetStrategy(strategy);
printstat("\n\nUsing %s strategy.\n", icetGetStrategyName());
if (strategy_uses_single_image_strategy(strategy)) {
num_single_image_strategy = SINGLE_IMAGE_STRATEGY_LIST_SIZE;
} else {
/* Set to one since single image strategy does not matter. */
num_single_image_strategy = 1;
}
for (single_image_strategy_index = 0;
single_image_strategy_index < num_single_image_strategy;
single_image_strategy_index++) {
IceTEnum single_image_strategy
= single_image_strategy_list[single_image_strategy_index];
int test_result;
icetSingleImageStrategy(single_image_strategy);
printstat("Using %s single image sub-strategy.\n",
icetGetSingleImageStrategyName());
test_result = BlankTilesDoTest();
if (test_result != TEST_PASSED) {
result = test_result;
}
}
}
return result;
}
static int SimpleExampleRun()
{
float angle;
/* Normally, the first thing that you do is set up your communication and
* then create at least one IceT context. This has already been done in
* the calling function (i.e. icetTests_mpi.c). See the init_mpi in
* test_mpi.h for an example.
*/
/* If we had set up the communication layer ourselves, we could have
* gotten these parameters directly from it. Since we did not, this
* provides an alternate way. */
icetGetIntegerv(ICET_RANK, &rank);
icetGetIntegerv(ICET_NUM_PROCESSES, &num_proc);
/* We should be able to set any color we want, but we should do it BEFORE
* icetGLDrawFrame() is called, not in the callback drawing function.
* There may also be limitations on the background color when performing
* color blending. */
glClearColor(0.2f, 0.5f, 0.1f, 1.0f);
/* Give IceT a function that will issue the OpenGL drawing commands. */
icetGLDrawCallback(draw);
/* Give IceT the bounds of the polygons that will be drawn. Note that
* we must take into account any transformation that happens within the
* draw function (but IceT will take care of any transformation that
* happens before icetGLDrawFrame). */
icetBoundingBoxd(-0.5+rank, 0.5+rank, -0.5, 0.5, -0.5, 0.5);
/* Set up the tiled display. Normally, the display will be fixed for a
* given installation, but since this is a demo, we give two specific
* examples. */
if (num_proc < 4) {
/* Here is an example of a "1 tile" case. This is functionally
* identical to a traditional sort last algorithm. */
icetResetTiles();
icetAddTile(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0);
} else {
/* Here is an example of a 4x4 tile layout. The tiles are displayed
* with the following ranks:
*
* +---+---+
* | 0 | 1 |
* +---+---+
* | 2 | 3 |
* +---+---+
*
* Each tile is simply defined by grabing a viewport in an infinite
* global display screen. The global viewport projection is
* automatically set to the smallest region containing all tiles.
*
* This example also shows tiles abutted against each other.
* Mullions and overlaps can be implemented by simply shifting tiles
* on top of or away from each other.
*/
icetResetTiles();
icetAddTile(0, (IceTInt)SCREEN_HEIGHT, SCREEN_WIDTH, SCREEN_HEIGHT, 0);
icetAddTile((IceTInt)SCREEN_WIDTH,
(IceTInt)SCREEN_HEIGHT,
SCREEN_WIDTH,
SCREEN_HEIGHT,
1);
icetAddTile(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 2);
icetAddTile((IceTInt)SCREEN_WIDTH, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 3);
}
/* Tell IceT what strategy to use. The REDUCE strategy is an all-around
* good performer. */
icetStrategy(ICET_STRATEGY_REDUCE);
/* Set up the projection matrix as you normally would. */
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-0.75, 0.75, -0.75, 0.75, -0.75, 0.75);
/* Other normal OpenGL setup. */
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
if (rank%8 != 0) {
GLfloat color[4];
color[0] = (float)(rank%2);
color[1] = (float)((rank/2)%2);
color[2] = (float)((rank/4)%2);
color[3] = 1.0f;
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color);
}
/* Here is an example of an animation loop. */
for (angle = 0; angle < 360; angle += 10) {
/* We can set up a modelview matrix here and IceT will factor this
* in determining the screen projection of the geometry. Note that
* there is further transformation in the draw function that IceT
* cannot take into account. That transformation is handled in the
* application by deforming the bounds before giving them to
* IceT. */
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRotated(angle, 0.0, 1.0, 0.0);
glScaled(1.0f/num_proc, 1.0, 1.0);
glTranslated(-(num_proc-1)/2.0, 0.0, 0.0);
/* Instead of calling draw() directly, call it indirectly through
* icetDrawFrame(). IceT will automatically handle image
* compositing. */
icetGLDrawFrame();
/* For obvious reasons, IceT should be run in double-buffered frame
* mode. After calling icetDrawFrame, the application should do a
* synchronize (a barrier is often about as good as you can do) and
* then a swap buffers. */
swap_buffers();
}
return TEST_PASSED;
}
static int BoundsBehindViewerRun()
{
float mat[16];
IceTImage image;
IceTInt rank;
icetGetIntegerv(ICET_RANK, &rank);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
icetGLDrawCallback(draw);
icetStrategy(ICET_STRATEGY_REDUCE);
icetBoundingBoxd(-1.0, 1.0, -1.0, 1.0, -0.0, 0.0);
icetSetColorFormat(ICET_IMAGE_COLOR_RGBA_UBYTE);
icetSetDepthFormat(ICET_IMAGE_DEPTH_FLOAT);
/* We're just going to use one tile. */
icetResetTiles();
icetAddTile(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0);
/* Set up the transformation such that the quad in draw should cover the
entire screen, but part of it extends behind the viewpoint. Furthermore, a
naive division by w will show all points to the right of the screen (which,
of course, is wrong). */
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslated(0.0, 0.0, -1.5);
glRotated(10.0, 0.0, 1.0, 0.0);
glScaled(10.0, 10.0, 10.0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-1.0, 1.0, -1.0, 1.0, 1.0, 2.0);
printstat("Modelview matrix:\n");
glGetFloatv(GL_MODELVIEW_MATRIX, mat);
PrintMatrix(mat);
printstat("Projection matrix:\n");
glGetFloatv(GL_PROJECTION_MATRIX, mat);
PrintMatrix(mat);
/* Other normal OpenGL setup. */
glEnable(GL_DEPTH_TEST);
glDisable(GL_LIGHTING);
glColor3d(1.0, 1.0, 1.0);
/* All the processes have the same data. Go ahead and tell IceT. */
icetDataReplicationGroupColor(0);
image = icetGLDrawFrame();
/* Test the resulting image to make sure the polygon was drawn over it. */
if (rank == 0) {
IceTUInt *cb = icetImageGetColorui(image);
if (cb[0] != 0xFFFFFFFF) {
printstat("First pixel in color buffer wrong: 0x%x\n", cb[0]);
return TEST_FAILED;
}
}
return TEST_PASSED;
}
void icetBoundingBoxf(GLfloat x_min, GLfloat x_max,
GLfloat y_min, GLfloat y_max,
GLfloat z_min, GLfloat z_max)
{
icetBoundingBoxd(x_min, x_max, y_min, y_max, z_min, z_max);
}
