Jserv's blog

Open Graphics Project

KernelTrap 日前對 OGP (Open Graphics Project) 的發起人 Timothy Miller 作了一份很精彩的訪談，可參考 [Interview: Timothy Miller]。OGP 是 Tech Source 有鑑於繪圖晶片製造商不再公開產品的內部規格，以致於 Free/Open Source 開發者無法撰寫充分發揮硬體能力的軟體建設的窘境，因此，OGP 一開始的目標就是建立完全開放的規格，讓開發者有足夠的資訊，釋放 2-D 與 3-D 加速繪圖顯示卡的威力。 以下節錄 OGP 的訴求： The OGP card will be a half-height, short card that will fit low-profile cases. It will support dual-link DVI, analog VGA, and TV out. It will support resolutions up to 2048 x 2048 (Tech Solutions has experience supporting Sony's high-resolution DDM [data display monitors] for air-traffic controllers), and will include some MPEG support, such as automatic YUV to RGB conversion. It will be released initially as a PCI card, with AGP and PCI-Express to follow, Miller says in the interview. 同時，這份訪談也指出，OGP 會支援 OpenGL 2.0，至於其詳細規格，可以參考：

• Spec
• Software Model
• Design Document

總結一下這張顯示卡的幾個重點： # Dual-link DVI, analog VGA, and TV out (NTSC, PAL, SECAM, etc.) # Extremely high display resolutions (like over 2048x2048) # 1.6 billion pixels per second maximum memory bandwidth [2] # 128 megabytes of graphics and texture memory # PCI, AGP, and PCI-Express (preliminary release will be PCI only) # Most of OpenGL 1.3 plus many later features # Unified 2D and 3D pipelines # Half-height, short card for low-profile cases # Some MPEG support, such as automatic YUV to RGB conversion # Flashable boot PROM for booting in any supported platform # Emulation of VGA modes for boot in x86 platforms 預計今年六月份，這張相當特別的顯示卡會現身，這篇訪談除了產品資訊外，Timothy Miller 也提及頗多繪圖硬體與軟體整合的資訊，很值得多參考。 事實上，這並不是新點子，早在幾年前就有個 [Manticore] 的計畫，作為 open source hardware design for a 3D graphics accelerator，全部以 VHDL 設計，在該計畫網頁上可以取得相當多寶貴的資訊。 由 jserv 發表於 January 28, 2005 06:10 PM