WIP: lunasvg implementation, things stopped working

2026-03-03 14:01:22 -05:00
parent 19bf78d635
commit 2703bbd901
80 changed files with 38694 additions and 12 deletions
--- a/src/ui/ui_icons.cpp
+++ b/src/ui/ui_icons.cpp
@@ -0,0 +1,76 @@
+// ui_icons.cpp - SVG icon rasterization via lunasvg
+
+#include "ui/ui_icons.h"
+#include <lunasvg.h>
+#include <stdlib.h>
+#include <string.h>
+
+UI_IconInfo g_icons[UI_ICON_COUNT] = {};
+
+// Simple SVG icon sources (24x24 viewBox)
+static const char *g_icon_svgs[UI_ICON_COUNT] = {
+    // UI_ICON_CLOSE - X mark
+    R"(<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
+        <path d="M6 6 L18 18 M18 6 L6 18" stroke="white" stroke-width="2.5" stroke-linecap="round"/>
+    </svg>)",
+
+    // UI_ICON_CHECK - checkmark
+    R"(<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
+        <path d="M5 12 L10 17 L19 7" stroke="white" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round" fill="none"/>
+    </svg>)",
+
+    // UI_ICON_CHEVRON_DOWN - downward arrow
+    R"(<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
+        <path d="M7 10 L12 15 L17 10" stroke="white" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round" fill="none"/>
+    </svg>)",
+};
+
+U8 *ui_icons_rasterize_atlas(S32 *out_w, S32 *out_h, S32 icon_size) {
+    // Pack icons in a row
+    S32 atlas_w = icon_size * UI_ICON_COUNT;
+    S32 atlas_h = icon_size;
+
+    // Pad to power of 2 isn't necessary for correctness, but ensure minimum size
+    if (atlas_w < 64) atlas_w = 64;
+    if (atlas_h < 64) atlas_h = 64;
+
+    U8 *atlas = (U8 *)calloc(atlas_w * atlas_h, 1);
+    if (!atlas) return nullptr;
+
+    S32 pen_x = 0;
+    for (S32 i = 0; i < UI_ICON_COUNT; i++) {
+        auto doc = lunasvg::Document::loadFromData(g_icon_svgs[i]);
+        if (!doc) continue;
+
+        lunasvg::Bitmap bmp = doc->renderToBitmap(icon_size, icon_size);
+        if (bmp.isNull()) continue;
+
+        // Extract alpha channel from ARGB32 premultiplied into R8
+        U8 *src = bmp.data();
+        S32 bmp_w = bmp.width();
+        S32 bmp_h = bmp.height();
+        S32 stride = bmp.stride();
+
+        for (S32 y = 0; y < bmp_h && y < atlas_h; y++) {
+            for (S32 x = 0; x < bmp_w && (pen_x + x) < atlas_w; x++) {
+                // ARGB32 premultiplied: bytes are B, G, R, A (little-endian)
+                U8 a = src[y * stride + x * 4 + 3];
+                atlas[y * atlas_w + pen_x + x] = a;
+            }
+        }
+
+        // Store UV and pixel info
+        g_icons[i].u0 = (F32)pen_x / (F32)atlas_w;
+        g_icons[i].v0 = 0.0f;
+        g_icons[i].u1 = (F32)(pen_x + bmp_w) / (F32)atlas_w;
+        g_icons[i].v1 = (F32)bmp_h / (F32)atlas_h;
+        g_icons[i].w = (F32)bmp_w;
+        g_icons[i].h = (F32)bmp_h;
+
+        pen_x += icon_size;
+    }
+
+    *out_w = atlas_w;
+    *out_h = atlas_h;
+    return atlas;
+}