blend_line(9)

🎀 blend_line(9) 🎀

okay so bestie, welcome to the Kernel API Manual page for blend_line. It is literally here to “Blend a line from a plane to the output buffer.” That’s the whole assignment. No cap. 💅

✨ NAME ✨

blend_line — Blend a line from a plane to the output buffer. Iconic behavior, honestly. 💖

🌸 SYNOPSIS 🌸

void blend_line (struct vkms_plane_state *current_plane , int y , int
       crtc_x_limit , struct line_buffer *stage_buffer , struct line_buffer
       *output_buffer );

The signature says void, so there’s no return value to catch. Slay. 🫶

🦋 ARGUMENTS 🦋

• current_plane — the current plane to work on. Like, the plane that has main character energy for this call. ✨
• y — the line to write in the output buffer. That’s your row, bestie. 📍
• crtc_x_limit — the width of the output buffer. That’s the width, no more no less. 📏
• stage_buffer — a temporary buffer to convert the pixel line from the source buffer. Lowkey the middleman of the pixel pipeline. 🧚
• output_buffer — the buffer to blend the read line into. The final destination. Periodt. 💖

🔗 SEE ALSO 🔗

• Kernel file ./drivers/gpu/drm/vkms/vkms_composer.c
• pre_mul_alpha_blend(9)
• direction_for_rotation(9)
• clamp_line_coordinates(9)
• blend(9)
• vkms_composer_worker(9)

These are the linked besties. Go browse, iykyk. 🫶

💖 cute sign-off: source/version is ./drivers/gpu/drm/vkms, dated October 2026, and this page is blend_line(9). Byeee, drink water. 🍓