adding gfx and ui stuff

2026-06-04 18:22:30 +02:00
parent d676c50961
commit 4dfac3f82f
48 changed files with 26734 additions and 3 deletions
--- a/gfx/ui.h
+++ b/gfx/ui.h
@@ -0,0 +1,181 @@
+#ifndef UI_H
+#define UI_H
+
+#include "platform.h"
+#include "render.h"
+#include "../core.h"
+#include "GLFW/glfw3.h"
+
+enum UI_Flag {
+    UI_Flag_WidthGrow=1<<0, // Default is fixed
+    UI_Flag_HeightGrow=1<<1, // Default is fixed
+    UI_Flag_Vertical=1<<2, // Default is horizontal
+    UI_Flag_3DScene=1<<3,
+    UI_Flag_Center=1<<4,
+    UI_Flag_Ignore=1<<7, // For optional parameters
+    UI_Flag_Pos_Absolute=1<<8, // Default is relative
+    // ..
+    UI_Flag_COUNT,
+};
+
+typedef struct UI_Padding UI_Padding;
+struct UI_Padding {
+    real32 top;
+    real32 right;
+    real32 bottom;
+    real32 left;
+};
+
+enum UI_Cursor {
+    UI_Cursor_Arrow=1<<0,
+    UI_Cursor_Pointer=1<<1,
+    UI_Cursor_Forbidden=1<<2,
+    UI_Cursor_Count=1<<3,
+};
+
+enum UI_TxtAlign {
+    UI_TxtAlign_Left=1<<0, // Default
+    UI_TxtAlign_Center=1<<1,
+    UI_TxtAlign_Right=1<<2,
+};
+
+typedef struct UI_RectStr UI_RectStr;
+struct UI_RectStr {
+    string s;
+    real32 xOffset;
+    real32 yOffset;
+    real32 lineHeight;
+    real32 fontSize;
+    Vec4 color;
+    enum UI_TxtAlign alignment;
+};
+
+typedef struct UI_Rect UI_Rect;
+struct UI_Rect {
+    enum UI_Flag flags;
+
+    int32 parent;
+    int32 firstChild;
+    int32 lastChild;
+    int32 nextSibling;
+
+    real32 xOffset;
+    real32 yOffset;
+
+    real32 width;
+    real32 minWidth;
+    real32 maxWidth;
+
+    real32 height;
+    real32 minHeight;
+    real32 maxHeight;
+
+    real32 borderRadius;
+    real32 borderThickness;
+
+    Vec4 color;
+    Vec4 borderColor;
+
+    UI_Padding padding;
+    real32 childGap;
+
+    real32 x;
+    real32 y;
+    real32 resolvedWidth;
+    real32 resolvedHeight;
+
+    UI_RectStr *stringData;
+    /**
+     * Inherited from parent to propagate attributes. Actual string is ignored, only used for filling out defaults in
+     * the next stringData pointer that is set.
+     * This pointer is always set, as the global UI context will set it on the root node if it does not present its own
+     * text data.
+     */
+    UI_RectStr *inheritedTextAttr;
+};
+DefineList(UI_Rect, UI_Rect);
+
+typedef struct UI_Context UI_Context;
+struct UI_Context {
+    Arena *arena;
+    UI_RectList prevRects;
+    UI_RectList rects;
+    int32 hotNode;
+    int32 hoveredNode;
+    int32 prevHoveredNode;
+    int32 scene3DHandle;
+    int32 prevHotNode;
+    Renderer *renderer;
+
+    OS_Input *prevInput;
+    OS_Input *input;
+    enum UI_Cursor cursorType;
+
+    int32 rootRect;
+    int32 currRect;
+};
+
+void ui_begin(UI_Context *ui);
+void ui_end(UI_Context *ui);
+UI_Context ui_initContext(Arena *arena, Renderer *renderer);
+void ui_resolve();
+void ui_rect(UI_Context *ui, UI_Rect rect);
+void ui_placeText(UI_Context *ui, UI_RectStr strData);
+void ui_attachTextAttr(UI_Context *ui, UI_Rect *rect, UI_RectStr strData);
+void ui_openElement(UI_Context *ui, UI_Rect rect);
+void ui_closeElement(UI_Context *ui);
+
+bool ui_CheckboxRect(UI_Context *ui, bool *value, UI_Rect rect);
+bool ui_Button(UI_Context *ui, UI_Rect rect, UI_RectStr textAttr);
+bool ui_ButtonWithHover(UI_Context *ui, UI_Rect rect, UI_Rect hovered, UI_RectStr textAttr);
+UI_Rect ui_HoverRect(UI_Context *ui, UI_Rect rect, UI_Rect hovered);
+
+extern UI_Context *__UI_current_ctx__;
+
+#if 0
+#define UI_DEBUG_ATTR .borderColor=COLOR_RED, .borderThickness=1,
+#else
+#define UI_DEBUG_ATTR
+#endif
+
+#define UI_Pass(ui) DeferLoop(ui_begin((ui)), ui_end((ui)))
+#define UI_PadUniform(padding) ((UI_Padding){ (padding), (padding), (padding), (padding) })
+#define UI_NextID() ((__UI_current_ctx__)->rects.length)
+
+#define UI(...)\
+    /** Place a UI_Rect defined in-place in the current position in the UI tree */\
+    DeferLoop(ui_openElement((__UI_current_ctx__), UI_RectAttr(__VA_ARGS__)), ui_closeElement((__UI_current_ctx__)))
+
+#define UI_RectAttr(...)\
+    /** Generate a UI_Rect to be passed as a value */\
+    ((UI_Rect){UI_DEBUG_ATTR .minHeight=-1, .minWidth=-1, .width=-1, .height=-1, .inheritedTextAttr=(__UI_current_ctx__->rects.data[(__UI_current_ctx__)->currRect].inheritedTextAttr), __VA_ARGS__})
+
+#define UI_FromRect(rect)\
+    /** Place a UI_Rect in the current position in the UI tree, as defined by an existing value */\
+    DeferLoop(ui_openElement((__UI_current_ctx__), (rect)), ui_closeElement((__UI_current_ctx__)))
+
+#define UI_TxtAttrS(str, ...)\
+    /** Generate UI text to be used as a value */\
+    ((UI_RectStr){ .color={-1,-1,-1,-1}, .alignment=-1, .xOffset=0, .yOffset=0, .fontSize=-1, .lineHeight=-1, .s=(str), __VA_ARGS__ })
+
+#define UI_TxtAttr(...)\
+    /** Generate UI text to be used as a value, attributes only, no string */\
+    ((UI_RectStr){ .color={-1,-1,-1,-1}, .alignment=-1, .xOffset=0, .yOffset=0, .fontSize=-1, .lineHeight=-1, .s=((string){.str=NULL,.length=0}), __VA_ARGS__ })
+
+#define UI_Txt(str, ...)\
+    /** Place UI text in the current position in the UI tree. Attaches to the current UI_Rect */\
+    (ui_placeText((__UI_current_ctx__), (UI_TxtAttrS(str, __VA_ARGS__))))
+
+#define UI_AttachTxtAttr(rect, txtAttr)\
+    /** Attach "phantom" text to the specified rect in order to set its heritable attributes for subsequent text in the UI subtrees */\
+    (ui_attachTextAttr((__UI_current_ctx__), (rect), (txtAttr)))
+
+#define UI_SetTxtAttr(...)\
+    /** Attach "phantom" text to the current rect in order to set its heritable attributes for subsequent text in the UI subtrees */\
+    (ui_placeText((__UI_current_ctx__), (UI_TxtAttr(__VA_ARGS__))))
+
+#define UI_TxtSeg(str, ...)\
+    /** Place a text fragment in its own box (useful for placing many text fragments in a row */\
+    UI() (UI_Txt((str), __VA_ARGS__))
+
+#endif