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Allow to override ImDrawIdx type (#292)

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ocornut 2015-08-09 11:11:39 -06:00
parent 915b46f1c1
commit 0c9fcdbe71
2 changed files with 7 additions and 8 deletions
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11
imgui.cpp
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@ -2182,13 +2182,10 @@ static void AddDrawListToRenderList(ImVector<ImDrawList*>& out_render_list, ImDr
draw_list->CmdBuffer.pop_back();
out_render_list.push_back(draw_list);
if (sizeof(ImDrawIdx) < 4)
{
// Check that draw_list doesn't use more vertices than indexable (default ImDrawIdx = 2 bytes = 64K vertices)
// If this assert triggers because you are drawing lots of stuff manually, a workaround is to use BeginChild()/EndChild() to put your draw commands in a new draw list
unsigned int max_vtx_idx = (unsigned int)1 << (sizeof(ImDrawIdx)*8);
IM_ASSERT(draw_list->_VtxCurrentIdx <= max_vtx_idx);
}
// Check that draw_list doesn't use more vertices than indexable (default ImDrawIdx = 2 bytes = 64K vertices)
// If this assert triggers because you are drawing lots of stuff manually, A) workaround by calling BeginChild()/EndChild() to put your draw commands in multiple draw lists, B) #define ImDrawIdx to a 'unsigned int' in imconfig.h and render accordingly.
const unsigned long long int max_vtx_idx = (unsigned long long int)1L << (sizeof(ImDrawIdx)*8);
IM_ASSERT((unsigned long long int)draw_list->_VtxCurrentIdx <= max_vtx_idx);
GImGui->IO.MetricsRenderVertices += draw_list->VtxBuffer.Size;
GImGui->IO.MetricsRenderIndices += draw_list->IdxBuffer.Size;

4
imgui.h
View File

@ -1013,8 +1013,10 @@ struct ImDrawCmd
void* UserCallbackData; // The draw callback code can access this.
};
// Vertex index
// Vertex index (override with, e.g. '#define ImDrawIdx unsigned int' in ImConfig)
#ifndef ImDrawIdx
typedef unsigned short ImDrawIdx;
#endif
// Vertex layout
#ifndef IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT