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gpu/shaders: fix GPU hang

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This is a port of https://github.com/linebender/piet-gpu/pull/108.

Updates gio#214
Updates gio#219

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2021-07-19 19:14:50 +02:00
parent 62a8b80c81
commit 4f40b58e0d
2 changed files with 62 additions and 59 deletions
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gpu/shaders.go
+57 -58
View File
@@ -5672,9 +5672,11 @@ void main()
vec2 err_v = (((cubic.p2 - cubic.p1) * 3.0) + cubic.p0) - cubic.p3;
float err = (err_v.x * err_v.x) + (err_v.y * err_v.y);
uint n_quads = max(uint(ceil(pow(err * 3.7037036418914794921875, 0.16666667163372039794921875))), 1u);
n_quads = min(n_quads, 16u);
float val = 0.0;
vec2 qp0 = cubic.p0;
float _step = 1.0 / float(n_quads);
SubdivResult keep_params[16];
for (uint i = 0u; i < n_quads; i++)
{
float t = float(i + 1u) * _step;
@@ -5696,6 +5698,7 @@ void main()
vec2 param_18 = qp2;
float param_19 = 0.4743416607379913330078125;
SubdivResult params = estimate_subdiv(param_16, param_17, param_18, param_19);
keep_params[i] = params;
val += params.val;
qp0 = qp2;
}
@@ -5718,7 +5721,7 @@ void main()
int n_out = 1;
float val_sum = 0.0;
vec2 p1;
float _1314;
float _1318;
TileSeg tile_seg;
for (uint i_1 = 0u; i_1 < n_quads; i_1++)
{
@@ -5736,30 +5739,26 @@ void main()
float param_35 = t_1 - (0.5 * _step);
vec2 qp1_1 = eval_cubic(param_31, param_32, param_33, param_34, param_35);
qp1_1 = (qp1_1 * 2.0) - ((qp0 + qp2_1) * 0.5);
vec2 param_36 = qp0;
vec2 param_37 = qp1_1;
vec2 param_38 = qp2_1;
float param_39 = 0.4743416607379913330078125;
SubdivResult params_1 = estimate_subdiv(param_36, param_37, param_38, param_39);
float param_40 = params_1.a0;
float u0 = approx_parabola_inv_integral(param_40);
float param_41 = params_1.a2;
float u2 = approx_parabola_inv_integral(param_41);
SubdivResult params_1 = keep_params[i_1];
float param_36 = params_1.a0;
float u0 = approx_parabola_inv_integral(param_36);
float param_37 = params_1.a2;
float u2 = approx_parabola_inv_integral(param_37);
float uscale = 1.0 / (u2 - u0);
float target = float(n_out) * v_step;
for (;;)
{
bool _1207 = uint(n_out) == n;
bool _1217;
if (!_1207)
bool _1211 = uint(n_out) == n;
bool _1221;
if (!_1211)
{
_1217 = target < (val_sum + params_1.val);
_1221 = target < (val_sum + params_1.val);
}
else
{
_1217 = _1207;
_1221 = _1211;
}
if (_1217)
if (_1221)
{
if (uint(n_out) == n)
{
@@ -5769,14 +5768,14 @@ void main()
{
float u = (target - val_sum) / params_1.val;
float a = mix(params_1.a0, params_1.a2, u);
float param_42 = a;
float au = approx_parabola_inv_integral(param_42);
float param_38 = a;
float au = approx_parabola_inv_integral(param_38);
float t_2 = (au - u0) * uscale;
vec2 param_43 = qp0;
vec2 param_44 = qp1_1;
vec2 param_45 = qp2_1;
float param_46 = t_2;
p1 = eval_quad(param_43, param_44, param_45, param_46);
vec2 param_39 = qp0;
vec2 param_40 = qp1_1;
vec2 param_41 = qp2_1;
float param_42 = t_2;
p1 = eval_quad(param_39, param_40, param_41, param_42);
}
float xmin = min(p0.x, p1.x) - cubic.stroke.x;
float xmax = max(p0.x, p1.x) + cubic.stroke.x;
@@ -5786,13 +5785,13 @@ void main()
float dy = p1.y - p0.y;
if (abs(dy) < 9.999999717180685365747194737196e-10)
{
_1314 = 1000000000.0;
_1318 = 1000000000.0;
}
else
{
_1314 = dx / dy;
_1318 = dx / dy;
}
float invslope = _1314;
float invslope = _1318;
float c = (cubic.stroke.x + (abs(invslope) * (16.0 + cubic.stroke.y))) * 0.03125;
float b = invslope;
float a_1 = (p0.x - ((p0.y - 16.0) * b)) * 0.03125;
@@ -5808,9 +5807,9 @@ void main()
int stride = bbox.z - bbox.x;
int base = ((y0 - bbox.y) * stride) - bbox.x;
uint n_tile_alloc = uint((x1 - x0) * (y1 - y0));
uint param_47 = n_tile_alloc * 24u;
MallocResult _1429 = malloc(param_47);
MallocResult tile_alloc = _1429;
uint param_43 = n_tile_alloc * 24u;
MallocResult _1433 = malloc(param_43);
MallocResult tile_alloc = _1433;
if (tile_alloc.failed || (!mem_ok))
{
return;
@@ -5828,37 +5827,37 @@ void main()
{
float tile_y0 = float(y * 32);
int xbackdrop = max((xray + 1), bbox.x);
bool _1486 = !is_stroke;
bool _1496;
if (_1486)
bool _1490 = !is_stroke;
bool _1500;
if (_1490)
{
_1496 = min(p0.y, p1.y) < tile_y0;
_1500 = min(p0.y, p1.y) < tile_y0;
}
else
{
_1496 = _1486;
_1500 = _1490;
}
bool _1503;
if (_1496)
bool _1507;
if (_1500)
{
_1503 = xbackdrop < bbox.z;
_1507 = xbackdrop < bbox.z;
}
else
{
_1503 = _1496;
_1507 = _1500;
}
if (_1503)
if (_1507)
{
int backdrop = (p1.y < p0.y) ? 1 : (-1);
TileRef param_48 = path.tiles;
uint param_49 = uint(base + xbackdrop);
TileRef tile_ref = Tile_index(param_48, param_49);
TileRef param_44 = path.tiles;
uint param_45 = uint(base + xbackdrop);
TileRef tile_ref = Tile_index(param_44, param_45);
uint tile_el = tile_ref.offset >> uint(2);
Alloc param_50 = path_alloc;
uint param_51 = tile_el + 1u;
if (touch_mem(param_50, param_51))
Alloc param_46 = path_alloc;
uint param_47 = tile_el + 1u;
if (touch_mem(param_46, param_47))
{
uint _1541 = atomicAdd(_145.memory[tile_el + 1u], uint(backdrop));
uint _1545 = atomicAdd(_145.memory[tile_el + 1u], uint(backdrop));
}
}
int next_xray = last_xray;
@@ -5877,17 +5876,17 @@ void main()
for (int x = xx0; x < xx1; x++)
{
float tile_x0 = float(x * 32);
TileRef param_52 = TileRef(path.tiles.offset);
uint param_53 = uint(base + x);
TileRef tile_ref_1 = Tile_index(param_52, param_53);
TileRef param_48 = TileRef(path.tiles.offset);
uint param_49 = uint(base + x);
TileRef tile_ref_1 = Tile_index(param_48, param_49);
uint tile_el_1 = tile_ref_1.offset >> uint(2);
uint old = 0u;
Alloc param_54 = path_alloc;
uint param_55 = tile_el_1;
if (touch_mem(param_54, param_55))
Alloc param_50 = path_alloc;
uint param_51 = tile_el_1;
if (touch_mem(param_50, param_51))
{
uint _1644 = atomicExchange(_145.memory[tile_el_1], tile_offset);
old = _1644;
uint _1648 = atomicExchange(_145.memory[tile_el_1], tile_offset);
old = _1648;
}
tile_seg.origin = p0;
tile_seg.vector = p1 - p0;
@@ -5919,10 +5918,10 @@ void main()
}
tile_seg.y_edge = y_edge;
tile_seg.next.offset = old;
Alloc param_56 = tile_alloc.alloc;
TileSegRef param_57 = TileSegRef(tile_offset);
TileSeg param_58 = tile_seg;
TileSeg_write(param_56, param_57, param_58);
Alloc param_52 = tile_alloc.alloc;
TileSegRef param_53 = TileSegRef(tile_offset);
TileSeg param_54 = tile_seg;
TileSeg_write(param_52, param_53, param_54);
tile_offset += 24u;
}
xc += b;
gpu/shaders/path_coarse.comp
+5 -1
View File
@@ -30,6 +30,7 @@ layout(set = 0, binding = 1) readonly buffer ConfigBuf {
#define Q_ACCURACY (ACCURACY * 0.1)
#define REM_ACCURACY (ACCURACY - Q_ACCURACY)
#define MAX_HYPOT2 (432.0 * Q_ACCURACY * Q_ACCURACY)
#define MAX_QUADS 16
vec2 eval_quad(vec2 p0, vec2 p1, vec2 p2, float t) {
float mt = 1.0 - t;
@@ -113,6 +114,8 @@ void main() {
float err = err_v.x * err_v.x + err_v.y * err_v.y;
// The number of quadratics.
uint n_quads = max(uint(ceil(pow(err * (1.0 / MAX_HYPOT2), 1.0 / 6.0))), 1);
n_quads = min(n_quads, MAX_QUADS);
SubdivResult keep_params[MAX_QUADS];
// Iterate over quadratics and tote up the estimated number of segments.
float val = 0.0;
vec2 qp0 = cubic.p0;
@@ -123,6 +126,7 @@ void main() {
vec2 qp1 = eval_cubic(cubic.p0, cubic.p1, cubic.p2, cubic.p3, t - 0.5 * step);
qp1 = 2.0 * qp1 - 0.5 * (qp0 + qp2);
SubdivResult params = estimate_subdiv(qp0, qp1, qp2, sqrt(REM_ACCURACY));
keep_params[i] = params;
val += params.val;
qp0 = qp2;
@@ -144,7 +148,7 @@ void main() {
vec2 qp2 = eval_cubic(cubic.p0, cubic.p1, cubic.p2, cubic.p3, t);
vec2 qp1 = eval_cubic(cubic.p0, cubic.p1, cubic.p2, cubic.p3, t - 0.5 * step);
qp1 = 2.0 * qp1 - 0.5 * (qp0 + qp2);
SubdivResult params = estimate_subdiv(qp0, qp1, qp2, sqrt(REM_ACCURACY));
SubdivResult params = keep_params[i];
float u0 = approx_parabola_inv_integral(params.a0);
float u2 = approx_parabola_inv_integral(params.a2);
float uscale = 1.0 / (u2 - u0);