static void
clip_emit_quad_job( struct setup_context *setup, uint thread, struct quad_job *job )
{
struct quad_header quad;
quad.input = job->input;
quad.inout = job->inout;
quad.coef = setup->quad.coef;
quad.posCoef = setup->quad.posCoef;
quad.nr_attrs = setup->quad.nr_attrs;
clip_emit_quad( setup, &quad, thread );
}
/**
* Plot a pixel in a line segment.
*/
static inline void
plot(struct setup_context *setup, int x, int y)
{
const int iy = y & 1;
const int ix = x & 1;
const int quadX = x - ix;
const int quadY = y - iy;
const int mask = (1 << ix) << (2 * iy);
if (quadX != setup->quad[0].input.x0 ||
quadY != setup->quad[0].input.y0)
{
/* flush prev quad, start new quad */
if (setup->quad[0].input.x0 != -1)
clip_emit_quad(setup, &setup->quad[0]);
setup->quad[0].input.x0 = quadX;
setup->quad[0].input.y0 = quadY;
setup->quad[0].inout.mask = 0x0;
}
setup->quad[0].inout.mask |= mask;
}
/**
* Do setup for point rasterization, then render the point.
* Round or square points...
* XXX could optimize a lot for 1-pixel points.
*/
void
sp_setup_point(struct setup_context *setup,
const float (*v0)[4])
{
struct softpipe_context *softpipe = setup->softpipe;
const struct tgsi_shader_info *fsInfo = &setup->softpipe->fs_variant->info;
const int sizeAttr = setup->softpipe->psize_slot;
const float size
= sizeAttr > 0 ? v0[sizeAttr][0]
: setup->softpipe->rasterizer->point_size;
const float halfSize = 0.5F * size;
const boolean round = (boolean) setup->softpipe->rasterizer->point_smooth;
const float x = v0[0][0]; /* Note: data[0] is always position */
const float y = v0[0][1];
const struct sp_setup_info *sinfo = &softpipe->setup_info;
uint fragSlot;
uint layer = 0;
unsigned viewport_index = 0;
#if DEBUG_VERTS
debug_printf("Setup point:\n");
print_vertex(setup, v0);
#endif
assert(sinfo->valid);
if (setup->softpipe->no_rast || setup->softpipe->rasterizer->rasterizer_discard)
return;
assert(setup->softpipe->reduced_prim == PIPE_PRIM_POINTS);
if (setup->softpipe->layer_slot > 0) {
layer = *(unsigned *)v0[setup->softpipe->layer_slot];
layer = MIN2(layer, setup->max_layer);
}
setup->quad[0].input.layer = layer;
if (setup->softpipe->viewport_index_slot > 0) {
unsigned *udata = (unsigned*)v0[setup->softpipe->viewport_index_slot];
viewport_index = sp_clamp_viewport_idx(*udata);
}
setup->quad[0].input.viewport_index = viewport_index;
/* For points, all interpolants are constant-valued.
* However, for point sprites, we'll need to setup texcoords appropriately.
* XXX: which coefficients are the texcoords???
* We may do point sprites as textured quads...
*
* KW: We don't know which coefficients are texcoords - ultimately
* the choice of what interpolation mode to use for each attribute
* should be determined by the fragment program, using
* per-attribute declaration statements that include interpolation
* mode as a parameter. So either the fragment program will have
* to be adjusted for pointsprite vs normal point behaviour, or
* otherwise a special interpolation mode will have to be defined
* which matches the required behaviour for point sprites. But -
* the latter is not a feature of normal hardware, and as such
* probably should be ruled out on that basis.
*/
setup->vprovoke = v0;
/* setup Z, W */
const_coeff(setup, &setup->posCoef, 0, 2);
const_coeff(setup, &setup->posCoef, 0, 3);
for (fragSlot = 0; fragSlot < fsInfo->num_inputs; fragSlot++) {
const uint vertSlot = sinfo->attrib[fragSlot].src_index;
uint j;
switch (sinfo->attrib[fragSlot].interp) {
case SP_INTERP_CONSTANT:
/* fall-through */
case SP_INTERP_LINEAR:
for (j = 0; j < TGSI_NUM_CHANNELS; j++)
const_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
break;
case SP_INTERP_PERSPECTIVE:
for (j = 0; j < TGSI_NUM_CHANNELS; j++)
point_persp_coeff(setup, setup->vprovoke,
&setup->coef[fragSlot], vertSlot, j);
break;
case SP_INTERP_POS:
setup_fragcoord_coeff(setup, fragSlot);
break;
default:
assert(0);
}
if (fsInfo->input_semantic_name[fragSlot] == TGSI_SEMANTIC_FACE) {
/* convert 0 to 1.0 and 1 to -1.0 */
setup->coef[fragSlot].a0[0] = setup->facing * -2.0f + 1.0f;
setup->coef[fragSlot].dadx[0] = 0.0;
setup->coef[fragSlot].dady[0] = 0.0;
}
}
if (halfSize <= 0.5 && !round) {
/* special case for 1-pixel points */
const int ix = ((int) x) & 1;
const int iy = ((int) y) & 1;
setup->quad[0].input.x0 = (int) x - ix;
setup->quad[0].input.y0 = (int) y - iy;
setup->quad[0].inout.mask = (1 << ix) << (2 * iy);
clip_emit_quad(setup, &setup->quad[0]);
}
else {
if (round) {
/* rounded points */
const int ixmin = block((int) (x - halfSize));
const int ixmax = block((int) (x + halfSize));
const int iymin = block((int) (y - halfSize));
const int iymax = block((int) (y + halfSize));
const float rmin = halfSize - 0.7071F; /* 0.7071 = sqrt(2)/2 */
const float rmax = halfSize + 0.7071F;
const float rmin2 = MAX2(0.0F, rmin * rmin);
const float rmax2 = rmax * rmax;
const float cscale = 1.0F / (rmax2 - rmin2);
int ix, iy;
for (iy = iymin; iy <= iymax; iy += 2) {
for (ix = ixmin; ix <= ixmax; ix += 2) {
float dx, dy, dist2, cover;
setup->quad[0].inout.mask = 0x0;
dx = (ix + 0.5f) - x;
dy = (iy + 0.5f) - y;
dist2 = dx * dx + dy * dy;
if (dist2 <= rmax2) {
cover = 1.0F - (dist2 - rmin2) * cscale;
setup->quad[0].input.coverage[QUAD_TOP_LEFT] = MIN2(cover, 1.0f);
setup->quad[0].inout.mask |= MASK_TOP_LEFT;
}
dx = (ix + 1.5f) - x;
dy = (iy + 0.5f) - y;
dist2 = dx * dx + dy * dy;
if (dist2 <= rmax2) {
cover = 1.0F - (dist2 - rmin2) * cscale;
setup->quad[0].input.coverage[QUAD_TOP_RIGHT] = MIN2(cover, 1.0f);
setup->quad[0].inout.mask |= MASK_TOP_RIGHT;
}
dx = (ix + 0.5f) - x;
dy = (iy + 1.5f) - y;
dist2 = dx * dx + dy * dy;
if (dist2 <= rmax2) {
cover = 1.0F - (dist2 - rmin2) * cscale;
setup->quad[0].input.coverage[QUAD_BOTTOM_LEFT] = MIN2(cover, 1.0f);
setup->quad[0].inout.mask |= MASK_BOTTOM_LEFT;
}
dx = (ix + 1.5f) - x;
dy = (iy + 1.5f) - y;
dist2 = dx * dx + dy * dy;
if (dist2 <= rmax2) {
cover = 1.0F - (dist2 - rmin2) * cscale;
setup->quad[0].input.coverage[QUAD_BOTTOM_RIGHT] = MIN2(cover, 1.0f);
setup->quad[0].inout.mask |= MASK_BOTTOM_RIGHT;
}
if (setup->quad[0].inout.mask) {
setup->quad[0].input.x0 = ix;
setup->quad[0].input.y0 = iy;
clip_emit_quad(setup, &setup->quad[0]);
}
}
}
}
else {
/* square points */
const int xmin = (int) (x + 0.75 - halfSize);
const int ymin = (int) (y + 0.25 - halfSize);
const int xmax = xmin + (int) size;
const int ymax = ymin + (int) size;
/* XXX could apply scissor to xmin,ymin,xmax,ymax now */
const int ixmin = block(xmin);
const int ixmax = block(xmax - 1);
const int iymin = block(ymin);
const int iymax = block(ymax - 1);
int ix, iy;
/*
debug_printf("(%f, %f) -> X:%d..%d Y:%d..%d\n", x, y, xmin, xmax,ymin,ymax);
*/
for (iy = iymin; iy <= iymax; iy += 2) {
uint rowMask = 0xf;
if (iy < ymin) {
/* above the top edge */
rowMask &= (MASK_BOTTOM_LEFT | MASK_BOTTOM_RIGHT);
}
if (iy + 1 >= ymax) {
/* below the bottom edge */
rowMask &= (MASK_TOP_LEFT | MASK_TOP_RIGHT);
}
for (ix = ixmin; ix <= ixmax; ix += 2) {
uint mask = rowMask;
if (ix < xmin) {
/* fragment is past left edge of point, turn off left bits */
mask &= (MASK_BOTTOM_RIGHT | MASK_TOP_RIGHT);
}
if (ix + 1 >= xmax) {
/* past the right edge */
mask &= (MASK_BOTTOM_LEFT | MASK_TOP_LEFT);
}
setup->quad[0].inout.mask = mask;
setup->quad[0].input.x0 = ix;
setup->quad[0].input.y0 = iy;
clip_emit_quad(setup, &setup->quad[0]);
}
}
}
}
}
/**
* Do setup for line rasterization, then render the line.
* Single-pixel width, no stipple, etc. We rely on the 'draw' module
* to handle stippling and wide lines.
*/
void
sp_setup_line(struct setup_context *setup,
const float (*v0)[4],
const float (*v1)[4])
{
int x0 = (int) v0[0][0];
int x1 = (int) v1[0][0];
int y0 = (int) v0[0][1];
int y1 = (int) v1[0][1];
int dx = x1 - x0;
int dy = y1 - y0;
int xstep, ystep;
uint layer = 0;
unsigned viewport_index = 0;
#if DEBUG_VERTS
debug_printf("Setup line:\n");
print_vertex(setup, v0);
print_vertex(setup, v1);
#endif
if (setup->softpipe->no_rast || setup->softpipe->rasterizer->rasterizer_discard)
return;
if (dx == 0 && dy == 0)
return;
if (!setup_line_coefficients(setup, v0, v1))
return;
assert(v0[0][0] < 1.0e9);
assert(v0[0][1] < 1.0e9);
assert(v1[0][0] < 1.0e9);
assert(v1[0][1] < 1.0e9);
if (dx < 0) {
dx = -dx; /* make positive */
xstep = -1;
}
else {
xstep = 1;
}
if (dy < 0) {
dy = -dy; /* make positive */
ystep = -1;
}
else {
ystep = 1;
}
assert(dx >= 0);
assert(dy >= 0);
assert(setup->softpipe->reduced_prim == PIPE_PRIM_LINES);
setup->quad[0].input.x0 = setup->quad[0].input.y0 = -1;
setup->quad[0].inout.mask = 0x0;
if (setup->softpipe->layer_slot > 0) {
layer = *(unsigned *)setup->vprovoke[setup->softpipe->layer_slot];
layer = MIN2(layer, setup->max_layer);
}
setup->quad[0].input.layer = layer;
if (setup->softpipe->viewport_index_slot > 0) {
unsigned *udata = (unsigned*)setup->vprovoke[setup->softpipe->viewport_index_slot];
viewport_index = sp_clamp_viewport_idx(*udata);
}
setup->quad[0].input.viewport_index = viewport_index;
/* XXX temporary: set coverage to 1.0 so the line appears
* if AA mode happens to be enabled.
*/
setup->quad[0].input.coverage[0] =
setup->quad[0].input.coverage[1] =
setup->quad[0].input.coverage[2] =
setup->quad[0].input.coverage[3] = 1.0;
if (dx > dy) {
/*** X-major line ***/
int i;
const int errorInc = dy + dy;
int error = errorInc - dx;
const int errorDec = error - dx;
for (i = 0; i < dx; i++) {
plot(setup, x0, y0);
x0 += xstep;
if (error < 0) {
error += errorInc;
}
else {
error += errorDec;
y0 += ystep;
}
}
}
else {
/*** Y-major line ***/
int i;
const int errorInc = dx + dx;
int error = errorInc - dy;
const int errorDec = error - dy;
for (i = 0; i < dy; i++) {
plot(setup, x0, y0);
y0 += ystep;
if (error < 0) {
error += errorInc;
}
else {
error += errorDec;
x0 += xstep;
}
}
}
/* draw final quad */
if (setup->quad[0].inout.mask) {
clip_emit_quad(setup, &setup->quad[0]);
}
}
/**
* Do setup for line rasterization, then render the line.
* Single-pixel width, no stipple, etc. We rely on the 'draw' module
* to handle stippling and wide lines.
*/
void
llvmpipe_setup_line(struct setup_context *setup,
const float (*v0)[4],
const float (*v1)[4])
{
int x0 = (int) v0[0][0];
int x1 = (int) v1[0][0];
int y0 = (int) v0[0][1];
int y1 = (int) v1[0][1];
int dx = x1 - x0;
int dy = y1 - y0;
int xstep, ystep;
#if DEBUG_VERTS
debug_printf("Setup line:\n");
print_vertex(setup, v0);
print_vertex(setup, v1);
#endif
if (setup->llvmpipe->no_rast)
return;
if (dx == 0 && dy == 0)
return;
if (!setup_line_coefficients(setup, v0, v1))
return;
assert(v0[0][0] < 1.0e9);
assert(v0[0][1] < 1.0e9);
assert(v1[0][0] < 1.0e9);
assert(v1[0][1] < 1.0e9);
if (dx < 0) {
dx = -dx; /* make positive */
xstep = -1;
}
else {
xstep = 1;
}
if (dy < 0) {
dy = -dy; /* make positive */
ystep = -1;
}
else {
ystep = 1;
}
assert(dx >= 0);
assert(dy >= 0);
assert(setup->llvmpipe->reduced_prim == PIPE_PRIM_LINES);
setup->quad[0].input.x0 = setup->quad[0].input.y0 = -1;
setup->quad[0].inout.mask = 0x0;
/* XXX temporary: set coverage to 1.0 so the line appears
* if AA mode happens to be enabled.
*/
setup->quad[0].input.coverage[0] =
setup->quad[0].input.coverage[1] =
setup->quad[0].input.coverage[2] =
setup->quad[0].input.coverage[3] = 1.0;
if (dx > dy) {
/*** X-major line ***/
int i;
const int errorInc = dy + dy;
int error = errorInc - dx;
const int errorDec = error - dx;
for (i = 0; i < dx; i++) {
plot(setup, x0, y0);
x0 += xstep;
if (error < 0) {
error += errorInc;
}
else {
error += errorDec;
y0 += ystep;
}
}
}
else {
/*** Y-major line ***/
int i;
const int errorInc = dx + dx;
int error = errorInc - dy;
const int errorDec = error - dy;
for (i = 0; i < dy; i++) {
plot(setup, x0, y0);
y0 += ystep;
if (error < 0) {
error += errorInc;
}
else {
error += errorDec;
x0 += xstep;
}
}
}
/* draw final quad */
if (setup->quad[0].inout.mask) {
clip_emit_quad( setup, &setup->quad[0] );
}
}
