CV184X GFBG Development Guide

Revision History

Revision	Date	Description
0.1	2025/04/21	Initial version

Contents

• 1. Disclaimer
• 2. GFBG Overview
• 3. GFBG Function Description
  • 3.1. Architecture
  • 3.2. Standard and Extended Functions
    • 3.2.1. Standard Functions
    • 3.2.2. Extended Functions
  • 3.3. Graphics-layer Refresh Types in Extended Mode
    • 3.3.1. 0 buffer (that is, CVI_FB_LAYER_BUF_NONE)
    • 3.3.2. 1 buffer (that is, CVI_FB_LAYER_BUF_ONE) Not supported yet
    • 3.3.3. 2 buffer (that is, CVI_FB_LAYER_BUF_DOUBLE) Not supported yet
      • 3.3.3.1. Graphics-layer Compression Not supported yet
• 4. Module Loading
  • 4.1. Principle
  • 4.2. Parameter Settings
    • 4.2.1. Parametersvideo
    • 4.2.2. Relationship Between Physical Video Memory and Virtual Memory
    • 4.2.3. Default Parameter Values
• 5. Application Development Process
• 6. GFBG Interface Description
  • 6.1. ioctl Function
    • 6.1.1. FBIOGET_VSCREENINFO
    • 6.1.2. FBIOPUT_VSCREENINFO
    • 6.1.3. FBIOGET_FSCREENINFO
    • 6.1.4. FBIOPAN_DISPLAY
    • 6.1.5. FBIOGET_SCREEN_ORIGIN_GFBG
    • 6.1.6. FBIOPUT_SCREEN_ORIGIN_GFBG
    • 6.1.7. FBIOGET_SHOW_GFBG
    • 6.1.8. FBIOPUT_SHOW_GFBG
    • 6.1.9. FBIOGET_COLORKEY_GFBG
    • 6.1.10. FBIOPUT_COLORKEY_GFBG
    • 6.1.11. FBIOGET_VER_BLANK_GFBG
    • 6.1.12. FBIOPUT_LAYER_INFO
    • 6.1.13. FBIOGET_LAYER_INFO
    • 6.1.14. FBIOGET_CANVAS_BUF
    • 6.1.15. FBIO_REFRESH
    • 6.1.16. FBIOPUT_SCREEN_SIZE
    • 6.1.17. FBIOGET_SCREEN_SIZE