Thank you, Mathias! I have succeed in 18 bpp display at andriod with your great help.
On 12月9日, 下午12时40分, FlyCry <[EMAIL PROTECTED]> wrote: > Thanks a lot! > I'll try it. > > On 12月9日, 上午11时00分, Mathias Agopian <[EMAIL PROTECTED]> wrote: > > > > > Hi, > > > On Mon, Dec 8, 2008 at 6:19 PM, FlyCry <[EMAIL PROTECTED]> wrote: > > > > When I try to add a new pixel format for my board, I found a macro > > > GGL_PIXEL_FORMAT_RGB_888 = 3, // 3x8-bit RGB > > > I can use this format. Because the LCDC can use this 3x8-bit > > > framebuffer to BGR666 output. > > > And also I modified the EGLDisplaySurface.cpp to > > > GGL_PIXEL_FORMAT_RGB_888. > > > At that moment, I found red and blue are exchanged. Because of LCDC > > > BGR666 output. > > > So I modified load_store.cpp to exchange red and blue. > > > Will the whole modified code break OpenGL? > > > Yes. > > > > Or if I want to use > > > GGL_PIXEL_FORMAT_RGB_888, is there any way to make it to BGR without > > > any change to load_store.cpp > > > Yes. You need to create a new format, with a new unused constant. The > > constant is a index in an array in pixelflinger/format.cpp -- you need > > to add the format's description there (just swap the values for R and > > B). Make sure EGLDisplaySurface.cpp returns your new format. > > > And it should just work :-) > > > Mathias > > > ? > > > > Thanks > > > > On 12月8日, 下午3时50分, Mathias Agopian <[EMAIL PROTECTED]> wrote: > > >> Hi, > > > >> I talked about this a little bit in my 2nd answer to this thread. You > > >> will have to create a new BGR pixel-format and use this one. Adding a > > >> pixel format to the system is not too hard, but it requires adding a > > >> constant into multiple files (and make sure they all match). > > > >> For your information, a 32-bits BGR format has been added to the > > >> system after 1.0 was released (it is needed for the GPU to render into > > >> 32-bits surfaces). > > > >> Have a look at pixelflinger's format.cpp, this is where the > > >> pixelformats are defined, it will ripple from there (the corresponding > > >> header file has a list of the other files that must be updated). > > > >> Eventually, I should define all the useful pixelformat enums somewhere > > >> so that we don't have collisions when people add new formats. > > > >> In theory pixelfinger can handle pretty much any pixel configuration; > > >> so we could add a mechanism to create formats at runtime, which would > > >> also avoid the namespace problem. > > > >> Mathias > > > >> On Sun, Dec 7, 2008 at 8:39 PM, FlyCry <[EMAIL PROTECTED]> wrote: > > > >> > Hi, Mathias. Sorry to reply until now, cause somthing else I have to > > >> > deal with in my job. > > >> > I modified the assembly code of load_store.cpp. You mean that it would > > >> > break GL_RGB? So if LCDC needs a BGR framebuffer, but android gives an > > >> > RGB. What can I do to work it out? Could android give BGR display? > > > >> > On 12月5日, 上午8时44分, David Given <[EMAIL PROTECTED]> wrote: > > >> >> Mathias Agopian wrote: > > > >> >> [...] > > > >> >> > I don't understand what "looking at a GL_RGB pixel in a word" > > >> >> > means. A > > >> >> > word has 32 bits, GL_RGB has 24. > > > >> >> Well, I thought it was pretty obvious --- you load your 24 bits, in > > >> >> natural order, into the bottom end of a quad, exactly the same way > > >> >> that > > >> >> you'd load a 32 bit value or a 16 bit value or an 8 bit value! > > > >> >> The only thing that makes it the slightest bit complicated is that > > >> >> GL_RGB is unaligned so you wouldn't be able to use a simple LDR > > >> >> instruction, but that's just an implementation issue. > > > >> >> -- > > >> >> ┌─── ｄｇ＠ｃｏｗｌａｒｋ．ｃｏｍ ─────http://www.cowlark.com───── > > >> >> │ > > >> >> │ ⍎'⎕',∊N⍴⊂S←'←⎕←(3=T)⋎M⋏2=T←⊃+/(V⌽"⊂M),(V⊝"M),(V,⌽V)⌽"(V,V←1⎺1)⊝"⊂M)' > > >> >> │ --- Conway's Game Of Life, in one line of APL > > > >> >> signature.asc > > >> >> < 1K查看下载- 隐藏被引用文字 - > > > >> - 显示引用的文字 -- 隐藏被引用文字 - > > > - 显示引用的文字 -- 隐藏被引用文字 - > > - 显示引用的文字 - --~--~---------~--~----~------------~-------~--~----~ unsubscribe: [EMAIL PROTECTED] website: http://groups.google.com/group/android-porting -~----------~----~----~----~------~----~------~--~---
