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render3d/vk: a small window's screen has no depth image

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A small window (r3d_small: the launcher's UI process) draws its interface flat
and tests no depth, but gvk_screen_make gave it a 32-bit depth image the size
of the screen - 8 MB at 1920 x 1080. In small mode the screen has none: the
pass and a clear with no depth attachment already leave depth alone (clearing
DEPTH_BUFFER_BIT with no attachment is skipped), and pipelines follow the
pass's formats.

With the launcher's own 1920 x 1080 backdrop (maroon-lake game/launcher-small),
the launcher window measured 378 -> 295 MB of footprint at 25 s; its headless
shot (R3D_SMALL=1, so no depth) differs from the unchanged build by 0.279% of
pixels, the resized backdrop, and two runs of each are identical.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-29 14:50:17 +03:00
parent 22a384a76a
commit 9b1cd7d608
1 changed files with 9 additions and 2 deletions
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11
packages/ludic.render3d/gpu_vk_draw.ludic
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@ -1064,9 +1064,16 @@ function gvk_screen_make(render3d_st: mut Render3dState, w: int, h: int) -> bool
}
render3d_st.gvk_screen_w = w
render3d_st.gvk_screen_h = h
if render3d_st.gvk_screen_color == 0 { render3d_st.gvk_screen_color = gvk_tex_new(render3d_st); render3d_st.gvk_screen_depth = gvk_tex_new(render3d_st) }
# a small window (r3d_small) draws its interface flat and tests no depth: its screen has no depth
# image (8 MB at 1920 x 1080), and a pass or a clear with no depth attachment leaves depth alone
if render3d_st.gvk_screen_color == 0 {
render3d_st.gvk_screen_color = gvk_tex_new(render3d_st)
if not render3d_st.r3d_small { render3d_st.gvk_screen_depth = gvk_tex_new(render3d_st) }
}
render3d_st.gvk_vp[0] = 0; render3d_st.gvk_vp[1] = 0; render3d_st.gvk_vp[2] = w; render3d_st.gvk_vp[3] = h
return gvk_tex_storage(render3d_st, render3d_st.gvk_screen_color, false, gvk_screen_fmt(render3d_st), w, h, 1, false) and gvk_tex_storage(render3d_st, render3d_st.gvk_screen_depth, false, GL_DEPTH_COMPONENT32F, w, h, 1, false)
if not gvk_tex_storage(render3d_st, render3d_st.gvk_screen_color, false, gvk_screen_fmt(render3d_st), w, h, 1, false) { return false }
if render3d_st.gvk_screen_depth == 0 { return true }
return gvk_tex_storage(render3d_st, render3d_st.gvk_screen_depth, false, GL_DEPTH_COMPONENT32F, w, h, 1, false)
}
function gvk_frame_cb(render3d_st: mut Render3dState) -> pointer {