v1.02

Fix compile issues with recent imgui, SDL and gl3w

imgui:

• Require constexpr support for mac
• Fix issue with IMGUI_DEFINE_MATH_OPERATORS define

example:

• SDL: Update version to 2.26.5
• gl3w: Update to rebased branch due to a 403
• imgui: Use rellocated sdl2 impl

Full Changelog: v1.01...v1.02

v1.01

Incremental update.

• Fix Policy CMP0076 warning.
• Fix implicit double to float cast.
• Update example to match upstream imgui examples.
• Fix example configuration error of gl3w

v1.00

Initial release with example.

First release of flame graphs for imgui.

I've seen a few in the past galleries, but none with simple to use APIs that were open source.

The function signature is similar to PlotLines and PlotHistogram

void PlotFlame(const char* label,
               void (*values_getter)(float* start, float* end, ImU8* level, const char** caption, const void* data, int idx),
               const void* data, int values_count, int values_offset = 0,
               const char* overlay_text = NULL,
               float scale_min = FLT_MAX, float scale_max = FLT_MAX,
               ImVec2 graph_size = ImVec2(0, 0));