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feat(image-picker): animated-image badge on GIF/WebP thumbnails

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Animated thumbnails now show a small play-arrow badge (bottom-right) so users can
spot which images move before hovering; it's hidden while the image plays on
hover.

Detection is cheap — a new util::IsAnimatedImageFile probes without a full
decode: animated WebP via WebPGetFeatures.has_animation, and a multi-frame GIF
via a lightweight image-descriptor block walk (stops at the 2nd frame). The
picker only probes .gif/.webp thumbnails and caches the result on the Thumb.

Verified: animated GIF + animated WebP report animated; still GIF/WebP/PNG do not.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
DanS
2026-07-15 11:44:57 -05:00
parent 137147921c
commit e7f2d2e3c7
3 changed files with 69 additions and 0 deletions
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17
src/ui/windows/image_picker.h
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@@ -258,6 +258,19 @@ public:
dl->AddText(icoFont, cell*0.34f, ImVec2(cc.x - cell*0.17f, cc.y - cell*0.17f),
OnSurfaceDisabled(), ICON_MD_IMAGE);
}
// "Animated" badge (bottom-right) on GIF/WebP that move — hidden while it plays on hover.
if (t && t->animated && !hov) {
float bh = std::max(13.0f * dp, cell * 0.24f);
float bw = bh * 1.15f;
ImVec2 bmax(mx.x - 4.0f * dp, mx.y - 4.0f * dp);
ImVec2 bmin(bmax.x - bw, bmax.y - bh);
dl->AddRectFilled(bmin, bmax, IM_COL32(0, 0, 0, 180), 4.0f * dp);
float gsz = bh * 0.92f;
ImVec2 gs = icoFont->CalcTextSizeA(gsz, FLT_MAX, 0, ICON_MD_PLAY_ARROW);
dl->AddText(icoFont, gsz,
ImVec2((bmin.x + bmax.x) * 0.5f - gs.x * 0.5f, (bmin.y + bmax.y) * 0.5f - gs.y * 0.5f),
IM_COL32(255, 255, 255, 235), ICON_MD_PLAY_ARROW);
}
if (sel) dl->AddRect(mn, mx, WithAlpha(Primary(), 220), 6.0f * dp, 0, 2.0f * dp);
else if (hov) { dl->AddRect(mn, mx, WithAlpha(OnSurface(), 90), 6.0f * dp, 0, 1.5f * dp); ImGui::SetMouseCursor(ImGuiMouseCursor_Hand); }
if (hov) material::Tooltip("%s", s_images[i].c_str());
@@ -316,6 +329,7 @@ public:
private:
struct Thumb {
ImTextureID tex = 0; int w = 0, h = 0; bool tried = false; // static frame-0 thumbnail
bool animated = false; // multi-frame GIF/WebP (badge)
std::vector<ImTextureID> frames; // full sequence (loaded on hover)
std::vector<float> delays; int aw = 0, ah = 0; float totalDur = 0.0f; bool animTried = false;
};
@@ -376,6 +390,9 @@ private:
if (s_loadedThisFrame >= kLoadsPerFrame) return nullptr; // defer to a later frame
s_loadedThisFrame++;
Thumb th; th.tried = true;
// Cheap animation probe (header/structure only) so animated items can show a badge without
// decoding all frames; only .gif/.webp can be animations in our decoders.
if (isAnimatableName(absPath)) th.animated = util::IsAnimatedImageFile(absPath.c_str());
int sw = 0, sh = 0;
unsigned char* raw = util::LoadRawPixelsFromFile(absPath.c_str(), &sw, &sh);
if (raw && sw > 0 && sh > 0) {