108 lines
3.6 KiB
C++
108 lines
3.6 KiB
C++
// ui_core.cpp - Clay wrapper implementation
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// CLAY_IMPLEMENTATION must be defined exactly once before including clay.h.
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// In the unity build, ui_core.h (which includes clay.h) has #pragma once,
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// so we include clay.h directly here first to get the implementation compiled.
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#include <stdlib.h>
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#define CLAY_IMPLEMENTATION
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#include "clay.h"
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#include "ui/ui_core.h"
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////////////////////////////////
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// Theme global
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UI_Theme g_theme = {};
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void ui_init_theme() {
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g_theme.bg_dark = Clay_Color{ 30, 30, 33, 255};
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g_theme.bg_medium = Clay_Color{ 41, 41, 43, 255};
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g_theme.bg_light = Clay_Color{ 51, 51, 56, 255};
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g_theme.bg_lighter = Clay_Color{ 56, 56, 61, 255};
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g_theme.border = Clay_Color{ 56, 56, 61, 255};
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g_theme.text = Clay_Color{224, 224, 224, 255};
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g_theme.text_dim = Clay_Color{112, 112, 112, 255};
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g_theme.accent = Clay_Color{ 87, 138, 176, 255};
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g_theme.accent_hover = Clay_Color{102, 153, 191, 255};
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g_theme.title_bar = Clay_Color{ 26, 26, 28, 255};
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g_theme.scrollbar_bg = Clay_Color{ 26, 26, 28, 255};
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g_theme.scrollbar_grab= Clay_Color{ 61, 61, 66, 255};
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}
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////////////////////////////////
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// Clay error handler
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static void clay_error_handler(Clay_ErrorData error) {
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char buf[512];
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int len = error.errorText.length < 511 ? error.errorText.length : 511;
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memcpy(buf, error.errorText.chars, len);
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buf[len] = '\0';
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fprintf(stderr, "[Clay Error] %s\n", buf);
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}
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////////////////////////////////
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// Clay text measurement bridge
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// Clay calls this; we forward to the app's UI_MeasureTextFn
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static UI_Context *g_measure_ctx = nullptr;
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static Clay_Dimensions clay_measure_text(Clay_StringSlice text, Clay_TextElementConfig *config, void *user_data) {
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UI_Context *ctx = (UI_Context *)user_data;
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if (!ctx || !ctx->measure_text_fn || text.length == 0) {
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return Clay_Dimensions{0, (float)config->fontSize};
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}
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Vec2F32 result = ctx->measure_text_fn(text.chars, text.length, (F32)config->fontSize, ctx->measure_text_user_data);
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return Clay_Dimensions{result.x, result.y};
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}
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////////////////////////////////
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// Lifecycle
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UI_Context *ui_create(F32 viewport_w, F32 viewport_h) {
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UI_Context *ctx = (UI_Context *)calloc(1, sizeof(UI_Context));
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uint32_t min_memory = Clay_MinMemorySize();
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ctx->clay_memory = malloc(min_memory);
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Clay_Arena clay_arena = Clay_CreateArenaWithCapacityAndMemory(min_memory, ctx->clay_memory);
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Clay_ErrorHandler err_handler = {};
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err_handler.errorHandlerFunction = clay_error_handler;
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err_handler.userData = ctx;
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ctx->clay_ctx = Clay_Initialize(clay_arena,
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Clay_Dimensions{viewport_w, viewport_h},
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err_handler);
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Clay_SetMeasureTextFunction(clay_measure_text, ctx);
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return ctx;
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}
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void ui_destroy(UI_Context *ctx) {
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if (!ctx) return;
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free(ctx->clay_memory);
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free(ctx);
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}
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void ui_begin_frame(UI_Context *ctx, F32 viewport_w, F32 viewport_h,
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Vec2F32 mouse_pos, B32 mouse_down,
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Vec2F32 scroll_delta, F32 dt)
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{
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Clay_SetCurrentContext(ctx->clay_ctx);
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Clay_SetLayoutDimensions(Clay_Dimensions{viewport_w, viewport_h});
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Clay_SetPointerState(Clay_Vector2{mouse_pos.x, mouse_pos.y}, mouse_down != 0);
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Clay_UpdateScrollContainers(true, Clay_Vector2{scroll_delta.x, scroll_delta.y}, dt);
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Clay_BeginLayout();
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}
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Clay_RenderCommandArray ui_end_frame(UI_Context *ctx) {
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(void)ctx;
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return Clay_EndLayout();
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}
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void ui_set_measure_text_fn(UI_Context *ctx, UI_MeasureTextFn fn, void *user_data) {
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ctx->measure_text_fn = fn;
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ctx->measure_text_user_data = user_data;
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}
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