(COSCUP 2009) olv talked about the internals inside Android OpenGL|ES stack and how to implement a new hardware accelerated GL|ES for Android. The reference hardware is Intel Integrated Graphics chip, and software stack is based on Mesa3D.

1. 關於我
libEGL and libGLESv1 CM
GEM and KMS
Android Wave Is Not Google Wave
A little 3D
Chia-I Wu
olv@0xlab.org
Aug 16, 2009
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

2. 關於我
libEGL and libGLESv1 CM
GEM and KMS
Outline
關於我
libEGL and libGLESv1 CM
libagl
libhgl
GEM and KMS
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

3. 關於我
libEGL and libGLESv1 CM
GEM and KMS
3D and Me
不會OpenGL
不會演算法
不會硬體
不會驅動程式
沒有在玩3D 遊戲
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

4. 關於我
libEGL and libGLESv1 CM
GEM and KMS
Who am I?
0xlab 成員
數學系畢業
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

5. 關於我
libEGL and libGLESv1 CM
GEM and KMS
Hurry Porter
把Intel DRI 驅動程式移植到Android
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

6. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
Outline
關於我
libEGL and libGLESv1 CM
libagl
libhgl
GEM and KMS
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

7. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
libGLESv1 CM
frameworks/base/opengl/libs/GLES CM/
OpenGL ES API
Entry points
void glClear ( void ) {
gl hooks t : : g l t const ∗ const c =
&g e t G l T h r e a d S p e c i f i c ()−> g l ;
r e t u r n c −>g l C l e a r ( ) ;
}
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

8. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
libEGL
frameworks/base/opengl/libs/EGL/
dlopen libagl 跟libhgl
libagl 提供軟體實作
libhgl 提供硬體實作
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

9. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
身為libhgl
Android 傳過來的是egl native window t
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

10. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
身為libhgl
Android 傳過來的是egl native window t
egl native window t 是EGLNativeWindowSurface
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

11. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
身為libhgl
Android 傳過來的是egl native window t
egl native window t 是EGLNativeWindowSurface
EGLNativeWindowSurface 是Surface
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

12. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
身為libhgl
Android 傳過來的是egl native window t
egl native window t 是EGLNativeWindowSurface
EGLNativeWindowSurface 是Surface
Surface 是...
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

13. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
Surface
Surface 是buffer
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

14. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
硬體
硬體要的也是buffer
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

15. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
硬體
硬體要的也是buffer
放座標
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

16. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
硬體
硬體要的也是buffer
放座標
放材質
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

17. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
硬體
硬體要的也是buffer
放座標
放材質
放shader
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

18. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
硬體
硬體要的也是buffer
放座標
放材質
放shader
放硬體指令
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

19. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
硬體
硬體要的也是buffer
放座標
放材質
放shader
放硬體指令
但是...
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

20. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
硬體限制
硬體要的是它能存取的buffer
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

21. 關於我
libagl
libEGL and libGLESv1 CM
libhgl
GEM and KMS
Intel
a.k.a GEM Object
讓Android 產生GEM object based Surface
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

22. 關於我
libEGL and libGLESv1 CM
GEM and KMS
Outline
關於我
libEGL and libGLESv1 CM
libagl
libhgl
GEM and KMS
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

23. 關於我
libEGL and libGLESv1 CM
GEM and KMS
GEM in CPU
GEM object 只是shared memory (man shmget(2))
X server 配置
應用程式繪圖
compiz 合成
跨process!
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

24. 關於我
libEGL and libGLESv1 CM
GEM and KMS
GEM in GPU
映射到AGP aperture
CPU cache
GPU cache
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

25. 關於我
libEGL and libGLESv1 CM
GEM and KMS
KMS
Kernel Mode Setting
叫kernel 做解晰度設定
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

26. 關於我
libEGL and libGLESv1 CM
GEM and KMS
KMS
i n t drmModeSetCrtc ( i n t fd ,
uint32 t crtcId ,
uint32 t bufferId ,
uint32 t x , uint32 t y ,
u i n t 3 2 t ∗ c o n n e c t o r s , i n t count ,
drmModeModeInfoPtr mode ) ;
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

27. 關於我
libEGL and libGLESv1 CM
GEM and KMS
gitorious
http://gitorious.org/android-eeepc/pages/Home
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D

28. 關於我
libEGL and libGLESv1 CM
GEM and KMS
Q&A
Questions?
Chia-I Wu olv@0xlab.org Android Wave Is Not Google Wave A little 3D