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renderer: safety++

Browse source 
introduced a threshold for the minimum dash size
to prevent excessive fragmentation.

issue: https://github.com/thorvg/thorvg/issues/3332
This commit is contained in:
Hermet Park 2025-03-24 23:43:33 +09:00 • committed by Hermet Park
parent be0cbc356a
commit 756f866d54
4 changed files with 8 additions and 7 deletions
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4
src/renderer/gl_engine/tvgGlTessellator.cpp
View file

@ -1993,7 +1993,7 @@ void DashStroke::dashLineTo(const Point& to)
} else {
Line curr = {mPtCur, to};
while (len - mCurrLen > 0.0001f) {
while (len - mCurrLen > DASH_PATTERN_THRESHOLD) {
Line right;
if (mCurrLen > 0.0f) {
Line left;
@ -2056,7 +2056,7 @@ void DashStroke::dashCubicTo(const Point& cnt1, const Point& cnt2, const Point&
this->cubicTo(cnt1, cnt2, end);
}
} else {
while (len - mCurrLen > 0.0001f) {
while (len - mCurrLen > DASH_PATTERN_THRESHOLD) {
Bezier right;
if (mCurrLen > 0.0f) {
Bezier left;

5
src/renderer/sw_engine/tvgSwShape.cpp
View file

@ -101,7 +101,6 @@ static void _dashLineTo(SwDashStroke& dash, const Point* to, const Matrix& trans
{
Line cur = {dash.ptCur, *to};
auto len = cur.length();
if (tvg::zero(len)) {
_outlineMoveTo(*dash.outline, &dash.ptCur, transform);
//draw the current line fully
@ -116,7 +115,7 @@ static void _dashLineTo(SwDashStroke& dash, const Point* to, const Matrix& trans
}
//draw the current line partially
} else {
while (len - dash.curLen > 0.0001f) {
while (len - dash.curLen > DASH_PATTERN_THRESHOLD) {
Line left, right;
if (dash.curLen > 0) {
len -= dash.curLen;
@ -177,7 +176,7 @@ static void _dashCubicTo(SwDashStroke& dash, const Point* ctrl1, const Point* ct
}
//draw the current line partially
} else {
while ((len - dash.curLen) > 0.0001f) {
while ((len - dash.curLen) > DASH_PATTERN_THRESHOLD) {
Bezier left, right;
if (dash.curLen > 0) {
len -= dash.curLen;

2
src/renderer/tvgRender.h
View file

@ -35,6 +35,8 @@ namespace tvg
using RenderData = void*;
using pixel_t = uint32_t;
#define DASH_PATTERN_THRESHOLD 0.001f
enum RenderUpdateFlag : uint8_t {None = 0, Path = 1, Color = 2, Gradient = 4, Stroke = 8, Transform = 16, Image = 32, GradientStroke = 64, Blend = 128, All = 255};
enum CompositionFlag : uint8_t {Invalid = 0, Opacity = 1, Blending = 2, Masking = 4, PostProcessing = 8}; //Composition Purpose

4
src/renderer/tvgShape.h
View file

@ -301,9 +301,9 @@ struct Shape::Impl : Paint::Impl
if (!dash.pattern) dash.pattern = tvg::malloc<float*>(sizeof(float) * cnt);
dash.length = 0.0f;
for (uint32_t i = 0; i < cnt; ++i) {
if (pattern[i] < FLT_EPSILON) {
if (pattern[i] < DASH_PATTERN_THRESHOLD) {
dash.count = 0;
return Result::InvalidArguments;
return Result::InvalidArguments;
}
dash.pattern[i] = pattern[i];
dash.length += dash.pattern[i];