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ImDrawCallback: Allow to override the signature of ImDrawCallback by #define-ing it. This is meant to facilitate custom rendering back-ends passing local render-specific data to the draw callback.

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omar 2019-06-06 00:20:29 +02:00
parent 480d57e6a2
commit fea5f70611
3 changed files with 11 additions and 0 deletions
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2
docs/CHANGELOG.txt
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@ -84,6 +84,8 @@ Other Changes:
support 32-bits indices. Most examples back-ends have been modified to support the VtxOffset field. support 32-bits indices. Most examples back-ends have been modified to support the VtxOffset field.
- ImDrawList: Added ImDrawCmd::IdxOffset value, equivalent to summing element count for each draw command. - ImDrawList: Added ImDrawCmd::IdxOffset value, equivalent to summing element count for each draw command.
This is provided for convenience and consistency with VtxOffset. This is provided for convenience and consistency with VtxOffset.
- ImDrawCallback: Allow to override the signature of ImDrawCallback by #define-ing it. This is meant to
facilitate custom rendering back-ends passing local render-specific data to the draw callback.
- ImFontAtlas: FreeType: Added RasterizerFlags::Monochrome flag to disable font anti-aliasing. (#2545) - ImFontAtlas: FreeType: Added RasterizerFlags::Monochrome flag to disable font anti-aliasing. (#2545)
Combine with RasterizerFlags::MonoHinting for best results. Combine with RasterizerFlags::MonoHinting for best results.
- ImFontGlyphRangesBuilder: Fixed unnecessarily over-sized buffer, which incidentally was also not - ImFontGlyphRangesBuilder: Fixed unnecessarily over-sized buffer, which incidentally was also not

6
imconfig.h
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@ -68,6 +68,12 @@
// Read about ImGuiBackendFlags_RendererHasVtxOffset for details. // Read about ImGuiBackendFlags_RendererHasVtxOffset for details.
//#define ImDrawIdx unsigned int //#define ImDrawIdx unsigned int
//---- Override ImDrawCallback signature (will need to modify renderer back-ends accordingly)
//struct ImDrawList;
//struct ImDrawCmd;
//typedef void (*MyImDrawCallback)(const ImDrawList* draw_list, const ImDrawCmd* cmd, void* my_renderer_user_data);
//#define ImDrawCallback MyImDrawCallback
//---- Tip: You can add extra functions within the ImGui:: namespace, here or in your own headers files. //---- Tip: You can add extra functions within the ImGui:: namespace, here or in your own headers files.
/* /*
namespace ImGui namespace ImGui

3
imgui.h
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@ -1771,7 +1771,10 @@ struct ImColor
// A) Change your GPU render state, // A) Change your GPU render state,
// B) render a complex 3D scene inside a UI element without an intermediate texture/render target, etc. // B) render a complex 3D scene inside a UI element without an intermediate texture/render target, etc.
// The expected behavior from your rendering function is 'if (cmd.UserCallback != NULL) { cmd.UserCallback(parent_list, cmd); } else { RenderTriangles() }' // The expected behavior from your rendering function is 'if (cmd.UserCallback != NULL) { cmd.UserCallback(parent_list, cmd); } else { RenderTriangles() }'
// If you want to override the signature of ImDrawCallback, you can simply use e.g. '#define ImDrawCallback MyDrawCallback' (in imconfig.h) + update rendering back-end accordingly.
#ifndef ImDrawCallback
typedef void (*ImDrawCallback)(const ImDrawList* parent_list, const ImDrawCmd* cmd); typedef void (*ImDrawCallback)(const ImDrawList* parent_list, const ImDrawCmd* cmd);
#endif
// Special Draw callback value to request renderer back-end to reset the graphics/render state. // Special Draw callback value to request renderer back-end to reset the graphics/render state.
// The renderer back-end needs to handle this special value, otherwise it will crash trying to call a function at this address. // The renderer back-end needs to handle this special value, otherwise it will crash trying to call a function at this address.