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minimal change commit (got transformers back)

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This commit is contained in:
SergeyN 2020-06-02 00:26:32 +02:00
parent 2af65585e0
commit 7423636e16
1 changed files with 47 additions and 11 deletions
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48
implot.cpp
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@ -60,7 +60,7 @@ You can read releases logs https://github.com/epezent/implot/releases for more d
#include "implot.h"
#include "imgui_internal.h"
#include <limits>
#include <algorithm> //std::min
#ifdef _MSC_VER
#define sprintf sprintf_s
#endif
@ -2166,7 +2166,6 @@ inline void RenderLineStrip(Getter getter, Transformer transformer, ImDrawList&
int i_end = offset + count;
if (i_end >= count)
i_end -= count;
const int segments = count - 1;
ImVec2 p1 = transformer(getter(offset));
if (HasFlag(gp.CurrentPlot->Flags, ImPlotFlags_AntiAliased)) {
for (int i1 = i_start; i1 != i_end; i1 = i1 + 1 < count ? i1 + 1 : i1 + 1 - count) {
@ -2178,17 +2177,54 @@ inline void RenderLineStrip(Getter getter, Transformer transformer, ImDrawList&
}
}
else {
int segments = count - 1, i1 = 1, segments_culled = 0;
const ImVec2 uv = DrawList._Data->TexUvWhitePixel;
DrawList.PrimReserve(segments * 6, segments * 4);
int segments_culled = 0;
for (int i1 = i_start; i1 != i_end; i1 = i1 + 1 < count ? i1 + 1 : i1 + 1 - count) {
ImVec2 p2 = transformer(getter(i1));
while (segments)
{
int cnt = (int/*todo - remove this cast*/)std::min(size_t(segments), (((size_t(1) << sizeof(ImDrawIdx) * 8) - 1 - DrawList._VtxCurrentIdx) / 4)); // find how many can be reserved up to end of current draw command's limit
if (cnt >= std::min(64, segments)) // make sure at least this many elements can be rendered to avoid situations where at the end of buffer this slow path is not taken all the time
{
if (segments_culled >= cnt)
segments_culled -= cnt; // reuse previous reservation
else
{
DrawList.PrimReserve((cnt - segments_culled) * 6, (cnt - segments_culled) * 4); // add more elements to previous reservation
segments_culled = 0;
}
}
else
{
if (segments_culled > 0)
{
DrawList.PrimUnreserve(segments_culled * 6, segments_culled * 4);
segments_culled = 0;
}
cnt = (int/*todo - remove this cast*/)std::min(size_t(segments), (((size_t(1) << sizeof(ImDrawIdx) * 8) - 1 - 0/*DrawList._VtxCurrentIdx*/) / 4));
DrawList.PrimReserve(cnt * 6, cnt * 4); // reserve new draw command
}
segments -= cnt;
for (size_t ie = i1 + cnt; i1 != ie; ++i1)
{
int idx = i1;
if (offset)
{
idx += offset;
if (idx >= count)
idx -= count;
}
ImVec2 p2 = transformer(getter(idx));
if (!cull || gp.BB_Grid.Overlaps(ImRect(ImMin(p1, p2), ImMax(p1, p2))))
RenderLine(DrawList, p1, p2, line_weight, col_line, uv);
else
segments_culled++;
p1 = p2;
}
}
if (segments_culled > 0)
DrawList.PrimUnreserve(segments_culled * 6, segments_culled * 4);
}