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AA branch: AddPolyline() stores normals on stack

This commit is contained in:
ocornut 2015-07-05 18:19:22 -06:00
parent c09af38804
commit 46c440d186
1 changed files with 7 additions and 11 deletions
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18
imgui.cpp
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@ -9095,8 +9095,6 @@ void ImDrawList::PrimRectUV(const ImVec2& a, const ImVec2& c, const ImVec2& uv_a
idx_write += 6;
}
static ImVector<ImVec2> GTempPolyData;
void ImDrawList::AddPolyline(const ImVec2* points, const int points_count, ImU32 col, float thickness, bool closed, bool anti_aliased)
{
(void)thickness; // Unsupported
@ -9119,10 +9117,15 @@ void ImDrawList::AddPolyline(const ImVec2* points, const int points_count, ImU32
{
// Anti-aliased stroke
const float AA_SIZE = 1.0f;
const ImU32 col_trans = col & 0x00ffffff;
const int idx_count = count*12;
const int vtx_count = points_count*3;
PrimReserve(idx_count, vtx_count);
unsigned int vtx_inner_idx = vtx_current_idx+1;
unsigned int vtx_outer_idx = vtx_current_idx+2;
// Temporary buffer
GTempPolyData.resize(points_count * 3);
ImVec2* temp_inner = &GTempPolyData[0];
ImVec2* temp_inner = (ImVec2*)alloca(points_count * 3 * sizeof(ImVec2));
ImVec2* temp_outer = temp_inner + points_count;
ImVec2* temp_normals = temp_inner + points_count * 2;
@ -9146,13 +9149,6 @@ void ImDrawList::AddPolyline(const ImVec2* points, const int points_count, ImU32
temp_inner[points_count-1] = points[points_count-1] - temp_normals[points_count-1] * AA_SIZE;
}
const ImU32 col_trans = col & 0x00ffffff;
const int idx_count = count*12;
const int vtx_count = points_count*3;
PrimReserve(idx_count, vtx_count);
unsigned int vtx_inner_idx = vtx_current_idx+1;
unsigned int vtx_outer_idx = vtx_current_idx+2;
// FIXME-OPT: Merge the different loops, possibly remove the temporary buffer.
for (int i1 = 0; i1 < count; i1++)
{