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gpu,gpu/shaders: revert attempt to fix path gaps

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This is effectively a revert of [0], reintroducing the path gaps
described in [1]. A follow-up change will implement another attempt.

[0] https://gioui.org/commit/2feec23561cd84d6b8ddbab84a202df66b123208
[1] https://github.com/linebender/piet-gpu/issues/62

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2021-03-13 10:09:40 +01:00
parent 65a2410bb9
commit 2b21b48a7c
9 changed files with 59 additions and 133 deletions
Download Patch File Download Diff File Expand all files Collapse all files
gpu/compute.go
+8 -47
View File
@@ -173,16 +173,12 @@ const (
pathSize = 12
binSize = 8
pathsegSize = 44
pathsegSize = 48
annoSize = 28
stateSize = 60
stateSize = 56
stateStride = 4 + 2*stateSize
)
const (
flagEndPath = 16 // FLAG_END_PATH from elements.comp
)
// mem.h constants.
const (
memNoError = 0 // NO_ERROR
@@ -680,49 +676,14 @@ func encodePath(pathData []byte, stroke clip.StrokeStyle, dashes dashOp) encoder
q := quad.quad
enc.quad(q.From, q.Ctrl, q.To, false)
}
if len(quads) > 0 {
enc.scene[len(enc.scene)-1][0] |= (flagEndPath << 16)
}
return enc
}
var (
prevTo f32.Point
hasPrev bool
)
for len(pathData) >= scene.CommandSize+4 {
cmd := ops.DecodeCommand(pathData[4:])
switch cmd.Op() {
case scene.OpFillLine:
from, to := scene.DecodeLine(cmd)
if hasPrev && from != prevTo {
enc.scene[len(enc.scene)-1][0] |= (flagEndPath << 16)
}
hasPrev = true
prevTo = to
case scene.OpFillQuad:
from, _, to := scene.DecodeQuad(cmd)
if hasPrev && from != prevTo {
enc.scene[len(enc.scene)-1][0] |= (flagEndPath << 16)
}
hasPrev = true
prevTo = to
case scene.OpFillCubic:
from, _, _, to := scene.DecodeCubic(cmd)
if hasPrev && from != prevTo {
enc.scene[len(enc.scene)-1][0] |= (flagEndPath << 16)
}
hasPrev = true
prevTo = to
default:
panic("unsupported path scene command")
}
enc.scene = append(enc.scene, cmd)
enc.npathseg++
pathData = pathData[scene.CommandSize+4:]
}
if hasPrev {
enc.scene[len(enc.scene)-1][0] |= (flagEndPath << 16)
}
return enc
}
@@ -1049,10 +1010,10 @@ func (e *encoder) endClip(bbox f32.Rectangle) {
func (e *encoder) rect(r f32.Rectangle, stroke bool) {
// Rectangle corners, clock-wise.
c0, c1, c2, c3 := r.Min, f32.Pt(r.Min.X, r.Max.Y), r.Max, f32.Pt(r.Max.X, r.Min.Y)
e.line(c0, c1, stroke, 0)
e.line(c1, c2, stroke, 0)
e.line(c2, c3, stroke, 0)
e.line(c3, c0, stroke, flagEndPath)
e.line(c0, c1, stroke)
e.line(c1, c2, stroke)
e.line(c2, c3, stroke)
e.line(c3, c0, stroke)
}
func (e *encoder) fill(col color.RGBA) {
@@ -1071,8 +1032,8 @@ func (e *encoder) fillImage(index int) {
e.npath++
}
func (e *encoder) line(start, end f32.Point, stroke bool, flags uint32) {
e.scene = append(e.scene, scene.Line(start, end, stroke, flags))
func (e *encoder) line(start, end f32.Point, stroke bool) {
e.scene = append(e.scene, scene.Line(start, end, stroke))
e.npathseg++
}
gpu/gpu.go
+4 -4
View File
@@ -1506,16 +1506,16 @@ func (d *drawOps) boundsForTransformedRect(r f32.Rectangle, tr f32.Affine2D) (au
buf := aux
bo := binary.LittleEndian
bo.PutUint32(buf, 0) // Contour
ops.EncodeCommand(buf[4:], scene.Line(r.Min, f32.Pt(r.Max.X, r.Min.Y), false, 0))
ops.EncodeCommand(buf[4:], scene.Line(r.Min, f32.Pt(r.Max.X, r.Min.Y), false))
buf = buf[4+scene.CommandSize:]
bo.PutUint32(buf, 0)
ops.EncodeCommand(buf[4:], scene.Line(f32.Pt(r.Max.X, r.Min.Y), r.Max, false, 0))
ops.EncodeCommand(buf[4:], scene.Line(f32.Pt(r.Max.X, r.Min.Y), r.Max, false))
buf = buf[4+scene.CommandSize:]
bo.PutUint32(buf, 0)
ops.EncodeCommand(buf[4:], scene.Line(r.Max, f32.Pt(r.Min.X, r.Max.Y), false, 0))
ops.EncodeCommand(buf[4:], scene.Line(r.Max, f32.Pt(r.Min.X, r.Max.Y), false))
buf = buf[4+scene.CommandSize:]
bo.PutUint32(buf, 0)
ops.EncodeCommand(buf[4:], scene.Line(f32.Pt(r.Min.X, r.Max.Y), r.Min, false, 0))
ops.EncodeCommand(buf[4:], scene.Line(f32.Pt(r.Min.X, r.Max.Y), r.Min, false))
}
// establish the transform mapping from bounds rectangle to transformed corners
gpu/shaders.go
+2 -2
View File
File diff suppressed because one or more lines are too long
gpu/shaders/elements.comp
+7 -32
View File
@@ -62,8 +62,6 @@ uint state_flag_index(uint partition_ix) {
#define FLAG_SET_LINEWIDTH 1
#define FLAG_SET_BBOX 2
#define FLAG_RESET_BBOX 4
#define FLAG_START_PATH 8
#define FLAG_END_PATH 16
// This is almost like a monoid (the interaction between transformation and
// bounding boxes is approximate)
@@ -89,45 +87,32 @@ State combine_state(State a, State b) {
c.translate.x = a.mat.x * b.translate.x + a.mat.z * b.translate.y + a.translate.x;
c.translate.y = a.mat.y * b.translate.x + a.mat.w * b.translate.y + a.translate.y;
c.linewidth = (b.flags & FLAG_SET_LINEWIDTH) == 0 ? a.linewidth : b.linewidth;
c.flags = (a.flags & (FLAG_SET_LINEWIDTH | FLAG_SET_BBOX | FLAG_START_PATH)) | b.flags;
c.flags = (a.flags & (FLAG_SET_LINEWIDTH | FLAG_SET_BBOX)) | b.flags;
c.flags |= (a.flags & FLAG_RESET_BBOX) >> 1;
c.flags |= (a.flags & FLAG_END_PATH) >> 1;
c.path_count = a.path_count + b.path_count;
c.pathseg_count = a.pathseg_count + b.pathseg_count;
c.tail = a.tail;
if ((a.flags & FLAG_END_PATH) != 0 && (b.flags & FLAG_START_PATH) == 0) {
c.tail = a.pathseg_count;
} else if ((b.flags & FLAG_START_PATH) != 0) {
c.tail = b.tail + a.pathseg_count;
}
return c;
}
State map_element(ElementRef ref) {
// TODO: it would *probably* be more efficient to make the memory read patterns less
// divergent, though it would be more wasted memory.
uint tag_flags = Element_tag(ref);
uint tag = Element_tag(ref);
State c;
c.bbox = vec4(0.0, 0.0, 0.0, 0.0);
c.mat = vec4(1.0, 0.0, 0.0, 1.0);
c.translate = vec2(0.0, 0.0);
c.linewidth = 1.0; // TODO should be 0.0
c.flags = 0;
c.tail = 0;
c.path_count = 0;
c.pathseg_count = 0;
// flags contain FLAG_END_PATH for segments last in their path.
uint flags = tag_flags >> 16;
switch (tag_flags & 0xffff) {
switch (tag) {
case Element_FillLine:
case Element_StrokeLine:
LineSeg line = Element_FillLine_read(ref);
c.bbox.xy = min(line.p0, line.p1);
c.bbox.zw = max(line.p0, line.p1);
c.pathseg_count = 1;
c.flags = flags;
break;
case Element_FillQuad:
case Element_StrokeQuad:
@@ -135,7 +120,6 @@ State map_element(ElementRef ref) {
c.bbox.xy = min(min(quad.p0, quad.p1), quad.p2);
c.bbox.zw = max(max(quad.p0, quad.p1), quad.p2);
c.pathseg_count = 1;
c.flags = flags;
break;
case Element_FillCubic:
case Element_StrokeCubic:
@@ -143,7 +127,6 @@ State map_element(ElementRef ref) {
c.bbox.xy = min(min(cubic.p0, cubic.p1), min(cubic.p2, cubic.p3));
c.bbox.zw = max(max(cubic.p0, cubic.p1), max(cubic.p2, cubic.p3));
c.pathseg_count = 1;
c.flags = flags;
break;
case Element_Fill:
case Element_FillImage:
@@ -183,7 +166,6 @@ shared vec2 sh_translate[WG_SIZE];
shared vec4 sh_bbox[WG_SIZE];
shared float sh_width[WG_SIZE];
shared uint sh_flags[WG_SIZE];
shared uint sh_tail[WG_SIZE];
shared uint sh_path_count[WG_SIZE];
shared uint sh_pathseg_count[WG_SIZE];
@@ -218,7 +200,6 @@ void main() {
sh_translate[gl_LocalInvocationID.x] = agg.translate;
sh_bbox[gl_LocalInvocationID.x] = agg.bbox;
sh_width[gl_LocalInvocationID.x] = agg.linewidth;
sh_tail[gl_LocalInvocationID.x] = agg.tail;
sh_flags[gl_LocalInvocationID.x] = agg.flags;
sh_path_count[gl_LocalInvocationID.x] = agg.path_count;
sh_pathseg_count[gl_LocalInvocationID.x] = agg.pathseg_count;
@@ -232,7 +213,6 @@ void main() {
other.bbox = sh_bbox[ix];
other.linewidth = sh_width[ix];
other.flags = sh_flags[ix];
other.tail = sh_tail[ix];
other.path_count = sh_path_count[ix];
other.pathseg_count = sh_pathseg_count[ix];
agg = combine_state(other, agg);
@@ -243,7 +223,6 @@ void main() {
sh_bbox[gl_LocalInvocationID.x] = agg.bbox;
sh_width[gl_LocalInvocationID.x] = agg.linewidth;
sh_flags[gl_LocalInvocationID.x] = agg.flags;
sh_tail[gl_LocalInvocationID.x] = agg.tail;
sh_path_count[gl_LocalInvocationID.x] = agg.path_count;
sh_pathseg_count[gl_LocalInvocationID.x] = agg.pathseg_count;
}
@@ -254,7 +233,6 @@ void main() {
exclusive.translate = vec2(0.0, 0.0);
exclusive.linewidth = 1.0; //TODO should be 0.0
exclusive.flags = 0;
exclusive.tail = 0;
exclusive.path_count = 0;
exclusive.pathseg_count = 0;
@@ -334,7 +312,6 @@ void main() {
other.bbox = sh_bbox[ix];
other.linewidth = sh_width[ix];
other.flags = sh_flags[ix];
other.tail = sh_tail[ix];
other.path_count = sh_path_count[ix];
other.pathseg_count = sh_pathseg_count[ix];
row = combine_state(row, other);
@@ -346,9 +323,7 @@ void main() {
// gains to be had from stashing in shared memory or possibly
// registers (though register pressure is an issue).
ElementRef this_ref = Element_index(ref, i);
uint tag_flags = Element_tag(this_ref);
uint tag = tag_flags & 0xffff;
uint flags = tag_flags >> 16;
uint tag = Element_tag(this_ref);
switch (tag) {
case Element_FillLine:
case Element_StrokeLine:
@@ -359,7 +334,7 @@ void main() {
path_cubic.p0 = p0;
path_cubic.p1 = mix(p0, p1, 1.0 / 3.0);
path_cubic.p2 = mix(p1, p0, 1.0 / 3.0);
path_cubic.succ_ix = (flags & FLAG_END_PATH) == 0 ? st.pathseg_count : st.tail;
path_cubic.p3 = p1;
path_cubic.path_ix = st.path_count;
if (tag == Element_StrokeLine) {
path_cubic.stroke = get_linewidth(st);
@@ -383,7 +358,7 @@ void main() {
path_cubic.p0 = p0;
path_cubic.p1 = mix(p1, p0, 1.0 / 3.0);
path_cubic.p2 = mix(p1, p2, 1.0 / 3.0);
path_cubic.succ_ix = (flags & FLAG_END_PATH) == 0 ? st.pathseg_count : st.tail;
path_cubic.p3 = p2;
path_cubic.path_ix = st.path_count;
if (tag == Element_StrokeQuad) {
path_cubic.stroke = get_linewidth(st);
@@ -404,7 +379,7 @@ void main() {
path_cubic.p0 = st.mat.xy * cubic.p0.x + st.mat.zw * cubic.p0.y + st.translate;
path_cubic.p1 = st.mat.xy * cubic.p1.x + st.mat.zw * cubic.p1.y + st.translate;
path_cubic.p2 = st.mat.xy * cubic.p2.x + st.mat.zw * cubic.p2.y + st.translate;
path_cubic.succ_ix = (flags & FLAG_END_PATH) == 0 ? st.pathseg_count : st.tail;
path_cubic.p3 = st.mat.xy * cubic.p3.x + st.mat.zw * cubic.p3.y + st.translate;
path_cubic.path_ix = st.path_count;
if (tag == Element_StrokeCubic) {
path_cubic.stroke = get_linewidth(st);
gpu/shaders/path_coarse.comp
+6 -16
View File
@@ -86,14 +86,6 @@ SubdivResult estimate_subdiv(vec2 p0, vec2 p1, vec2 p2, float sqrt_tol) {
return SubdivResult(val, a0, a2);
}
// PathSeg_Cubic_read_p0 is like PathSeg_StrokeCubic_read except it only reads p0.
vec2 PathSeg_Cubic_read_p0(Alloc a, PathSegRef ref) {
uint ix = (ref.offset + 4) >> 2;
uint raw0 = read_mem(a, ix + 0);
uint raw1 = read_mem(a, ix + 1);
return vec2(uintBitsToFloat(raw0), uintBitsToFloat(raw1));
}
void main() {
if (mem_error != NO_ERROR) {
return;
@@ -110,9 +102,7 @@ void main() {
case PathSeg_FillCubic:
case PathSeg_StrokeCubic:
PathStrokeCubic cubic = PathSeg_StrokeCubic_read(conf.pathseg_alloc, ref);
PathSegRef succ_ref = PathSegRef(conf.pathseg_alloc.offset + cubic.succ_ix * PathSeg_size);
vec2 p3 = PathSeg_Cubic_read_p0(conf.pathseg_alloc, succ_ref);
vec2 err_v = 3.0 * (cubic.p2 - cubic.p1) + cubic.p0 - p3;
vec2 err_v = 3.0 * (cubic.p2 - cubic.p1) + cubic.p0 - cubic.p3;
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);
@@ -122,8 +112,8 @@ void main() {
float step = 1.0 / float(n_quads);
for (uint i = 0; i < n_quads; i++) {
float t = float(i + 1) * step;
vec2 qp2 = eval_cubic(cubic.p0, cubic.p1, cubic.p2, p3, t);
vec2 qp1 = eval_cubic(cubic.p0, cubic.p1, cubic.p2, p3, t - 0.5 * step);
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));
val += params.val;
@@ -143,8 +133,8 @@ void main() {
float val_sum = 0.0;
for (uint i = 0; i < n_quads; i++) {
float t = float(i + 1) * step;
vec2 qp2 = eval_cubic(cubic.p0, cubic.p1, cubic.p2, p3, t);
vec2 qp1 = eval_cubic(cubic.p0, cubic.p1, cubic.p2, p3, t - 0.5 * step);
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));
float u0 = approx_parabola_inv_integral(params.a0);
@@ -154,7 +144,7 @@ void main() {
while (n_out == n || target < val_sum + params.val) {
vec2 p1;
if (n_out == n) {
p1 = p3;
p1 = cubic.p3;
} else {
float u = (target - val_sum) / params.val;
float a = mix(params.a0, params.a2, u);
gpu/shaders/pathseg.h
+20 -16
View File
@@ -18,11 +18,11 @@ struct PathFillCubic {
vec2 p0;
vec2 p1;
vec2 p2;
uint succ_ix;
vec2 p3;
uint path_ix;
};
#define PathFillCubic_size 32
#define PathFillCubic_size 36
PathFillCubicRef PathFillCubic_index(PathFillCubicRef ref, uint index) {
return PathFillCubicRef(ref.offset + index * PathFillCubic_size);
@@ -32,12 +32,12 @@ struct PathStrokeCubic {
vec2 p0;
vec2 p1;
vec2 p2;
uint succ_ix;
vec2 p3;
uint path_ix;
vec2 stroke;
};
#define PathStrokeCubic_size 40
#define PathStrokeCubic_size 44
PathStrokeCubicRef PathStrokeCubic_index(PathStrokeCubicRef ref, uint index) {
return PathStrokeCubicRef(ref.offset + index * PathStrokeCubic_size);
@@ -46,7 +46,7 @@ PathStrokeCubicRef PathStrokeCubic_index(PathStrokeCubicRef ref, uint index) {
#define PathSeg_Nop 0
#define PathSeg_FillCubic 1
#define PathSeg_StrokeCubic 2
#define PathSeg_size 44
#define PathSeg_size 48
PathSegRef PathSeg_index(PathSegRef ref, uint index) {
return PathSegRef(ref.offset + index * PathSeg_size);
@@ -62,12 +62,13 @@ PathFillCubic PathFillCubic_read(Alloc a, PathFillCubicRef ref) {
uint raw5 = read_mem(a, ix + 5);
uint raw6 = read_mem(a, ix + 6);
uint raw7 = read_mem(a, ix + 7);
uint raw8 = read_mem(a, ix + 8);
PathFillCubic s;
s.p0 = vec2(uintBitsToFloat(raw0), uintBitsToFloat(raw1));
s.p1 = vec2(uintBitsToFloat(raw2), uintBitsToFloat(raw3));
s.p2 = vec2(uintBitsToFloat(raw4), uintBitsToFloat(raw5));
s.succ_ix = raw6;
s.path_ix = raw7;
s.p3 = vec2(uintBitsToFloat(raw6), uintBitsToFloat(raw7));
s.path_ix = raw8;
return s;
}
@@ -79,8 +80,9 @@ void PathFillCubic_write(Alloc a, PathFillCubicRef ref, PathFillCubic s) {
write_mem(a, ix + 3, floatBitsToUint(s.p1.y));
write_mem(a, ix + 4, floatBitsToUint(s.p2.x));
write_mem(a, ix + 5, floatBitsToUint(s.p2.y));
write_mem(a, ix + 6, s.succ_ix);
write_mem(a, ix + 7, s.path_ix);
write_mem(a, ix + 6, floatBitsToUint(s.p3.x));
write_mem(a, ix + 7, floatBitsToUint(s.p3.y));
write_mem(a, ix + 8, s.path_ix);
}
PathStrokeCubic PathStrokeCubic_read(Alloc a, PathStrokeCubicRef ref) {
@@ -95,13 +97,14 @@ PathStrokeCubic PathStrokeCubic_read(Alloc a, PathStrokeCubicRef ref) {
uint raw7 = read_mem(a, ix + 7);
uint raw8 = read_mem(a, ix + 8);
uint raw9 = read_mem(a, ix + 9);
uint raw10 = read_mem(a, ix + 10);
PathStrokeCubic s;
s.p0 = vec2(uintBitsToFloat(raw0), uintBitsToFloat(raw1));
s.p1 = vec2(uintBitsToFloat(raw2), uintBitsToFloat(raw3));
s.p2 = vec2(uintBitsToFloat(raw4), uintBitsToFloat(raw5));
s.succ_ix = raw6;
s.path_ix = raw7;
s.stroke = vec2(uintBitsToFloat(raw8), uintBitsToFloat(raw9));
s.p3 = vec2(uintBitsToFloat(raw6), uintBitsToFloat(raw7));
s.path_ix = raw8;
s.stroke = vec2(uintBitsToFloat(raw9), uintBitsToFloat(raw10));
return s;
}
@@ -113,10 +116,11 @@ void PathStrokeCubic_write(Alloc a, PathStrokeCubicRef ref, PathStrokeCubic s) {
write_mem(a, ix + 3, floatBitsToUint(s.p1.y));
write_mem(a, ix + 4, floatBitsToUint(s.p2.x));
write_mem(a, ix + 5, floatBitsToUint(s.p2.y));
write_mem(a, ix + 6, s.succ_ix);
write_mem(a, ix + 7, s.path_ix);
write_mem(a, ix + 8, floatBitsToUint(s.stroke.x));
write_mem(a, ix + 9, floatBitsToUint(s.stroke.y));
write_mem(a, ix + 6, floatBitsToUint(s.p3.x));
write_mem(a, ix + 7, floatBitsToUint(s.p3.y));
write_mem(a, ix + 8, s.path_ix);
write_mem(a, ix + 9, floatBitsToUint(s.stroke.x));
write_mem(a, ix + 10, floatBitsToUint(s.stroke.y));
}
uint PathSeg_tag(Alloc a, PathSegRef ref) {
gpu/shaders/state.h
+9 -13
View File
@@ -10,14 +10,13 @@ struct State {
vec4 mat;
vec2 translate;
vec4 bbox;
uint tail;
float linewidth;
uint flags;
uint path_count;
uint pathseg_count;
};
#define State_size 60
#define State_size 56
StateRef State_index(StateRef ref, uint index) {
return StateRef(ref.offset + index * State_size);
@@ -39,16 +38,14 @@ State State_read(StateRef ref) {
uint raw11 = state[ix + 11];
uint raw12 = state[ix + 12];
uint raw13 = state[ix + 13];
uint raw14 = state[ix + 14];
State s;
s.mat = vec4(uintBitsToFloat(raw0), uintBitsToFloat(raw1), uintBitsToFloat(raw2), uintBitsToFloat(raw3));
s.translate = vec2(uintBitsToFloat(raw4), uintBitsToFloat(raw5));
s.bbox = vec4(uintBitsToFloat(raw6), uintBitsToFloat(raw7), uintBitsToFloat(raw8), uintBitsToFloat(raw9));
s.tail = raw10;
s.linewidth = uintBitsToFloat(raw11);
s.flags = raw12;
s.path_count = raw13;
s.pathseg_count = raw14;
s.linewidth = uintBitsToFloat(raw10);
s.flags = raw11;
s.path_count = raw12;
s.pathseg_count = raw13;
return s;
}
@@ -64,10 +61,9 @@ void State_write(StateRef ref, State s) {
state[ix + 7] = floatBitsToUint(s.bbox.y);
state[ix + 8] = floatBitsToUint(s.bbox.z);
state[ix + 9] = floatBitsToUint(s.bbox.w);
state[ix + 10] = s.tail;
state[ix + 11] = floatBitsToUint(s.linewidth);
state[ix + 12] = s.flags;
state[ix + 13] = s.path_count;
state[ix + 14] = s.pathseg_count;
state[ix + 10] = floatBitsToUint(s.linewidth);
state[ix + 11] = s.flags;
state[ix + 12] = s.path_count;
state[ix + 13] = s.pathseg_count;
}
internal/scene/scene.go
+2 -2
View File
@@ -42,13 +42,13 @@ func (c Command) Op() Op {
return Op(c[0])
}
func Line(start, end f32.Point, stroke bool, flags uint32) Command {
func Line(start, end f32.Point, stroke bool) Command {
tag := uint32(OpFillLine)
if stroke {
tag = uint32(OpStrokeLine)
}
return Command{
0: flags<<16 | tag,
0: tag,
1: math.Float32bits(start.X),
2: math.Float32bits(start.Y),
3: math.Float32bits(end.X),
op/clip/clip.go
+1 -1
View File
@@ -141,7 +141,7 @@ func (p *Path) LineTo(to f32.Point) {
data := p.ops.Write(scene.CommandSize + 4)
bo := binary.LittleEndian
bo.PutUint32(data[0:], uint32(p.contour))
ops.EncodeCommand(data[4:], scene.Line(p.pen, to, false, 0))
ops.EncodeCommand(data[4:], scene.Line(p.pen, to, false))
p.pen = to
p.hasSegments = true
}