Rendering using OpenGL ES 2.0/3.0 in a zero copy mode on MALI T628 - Graphics, Gaming, and VR forum - Support forums

Hi Michael

Sorry for my late answer but I had to buy and wait another board.

I looked around a lot but I am not successfull.

I am running on odroid xu3 (MALI T628), ubuntu 15.04, kernel with X11 enabled.

Linux odroid 3.10.72-23 #1 SMP PREEMPT Sat May 23 17:58:14 BRT 2015 armv7l armv7l armv7l GNU/Linux.

I get error 0x300c out of eglCreateImageKHR.

Basically I do the following (I attached complete source code)

1) setup EGL creating an X11 windows as argument of eglCreateWindowSurface

2) create compile and link minimum shaders to perform a texture rendering

3) create a texture

4) allocate a RGBA 8888 buffer filled with some data (vertical white bar)

5) try to create an EGLImage using eglCreateImageKHR and passing a fbdev_pixmap structure

Thanks for your help

Andrea

====== TestEGLImage.cpp ======

#include "EGL/egl.h"

#define EGL_EGLEXT_PROTOTYPES

#include "EGL/eglext.h"

#include "GLES2/gl2.h"

#define GL_GLEXT_PROTOTYPES

#include "GLES2/gl2ext.h"

#include "assert.h"

#include "stdio.h"

#include "stdlib.h"

#include <unistd.h>

#include "AVWindow.h"

#include "stdio.h"

#include "string.h"

#define WIDTH 1280

#define HEIGHT 720

#define NCYCLES 1

EGLint g_configAttributes[] =

{

/* DO NOT MODIFY. */

/* These attributes are in a known order and may be re-written at initialization according to application requests. */

EGL_SAMPLES, 4,

EGL_ALPHA_SIZE, 0,

EGL_RED_SIZE, 8,

EGL_GREEN_SIZE, 8,

EGL_BLUE_SIZE, 8,

EGL_BUFFER_SIZE, 32,

EGL_STENCIL_SIZE, 0,

EGL_RENDERABLE_TYPE, 0, /* This field will be completed according to application request. */

EGL_SURFACE_TYPE, EGL_WINDOW_BIT,

EGL_DEPTH_SIZE, 16,

/* MODIFY BELOW HERE. */

/* If you need to add or override EGL attributes from above, do it below here. */

EGL_NONE

};

EGLint g_contextAttributes[] =

{

EGL_CONTEXT_CLIENT_VERSION, 0, /* This field will be completed according to application request. */

EGL_NONE, EGL_NONE, /* If we use OpenGL ES 3.1, we will have to use EGL_CONTEXT_MINOR_VERSION,

and we overwrite these fields. */

EGL_NONE

};

EGLConfig g_config;

EGLint g_windowAttributes[] =

{

EGL_NONE

* Uncomment and remove EGL_NONE above to specify EGL_RENDER_BUFFER value to eglCreateWindowSurface.

* EGL_RENDER_BUFFER, EGL_BACK_BUFFER,

* EGL_NONE

};

EGLConfig findConfig(EGLDisplay display)

{

bool strictMatch;

#if defined(__arm__)

strictMatch = true;

#else

strictMatch = false;

#endif

EGLConfig *configsArray = NULL;

EGLint numberOfConfigs = 0;

EGLBoolean success = EGL_FALSE;

/* Enumerate available EGL configurations which match or exceed our required attribute list. */

success = eglChooseConfig(display, g_configAttributes, NULL, 0, &numberOfConfigs);

if (success != EGL_TRUE)

{

printf("Failed to enumerate EGL configs");

exit(1);

}

printf("Number of configs found is %d\n", numberOfConfigs);

if (numberOfConfigs == 0)

{

printf("Disabling AntiAliasing to try and find a config.\n");

g_configAttributes[1] = EGL_DONT_CARE;

success = eglChooseConfig(display, g_configAttributes, NULL, 0, &numberOfConfigs);

if (success != EGL_TRUE)

{

printf("Failed to enumerate EGL configs 2");

exit(1);

}

if (numberOfConfigs == 0)

{

printf("No configs found with the requested attributes");

exit(1);

}

else

{

printf("Configs found when antialiasing disabled.\n ");

}

/* Allocate space for all EGL configs available and get them. */

configsArray = (EGLConfig *)calloc(numberOfConfigs, sizeof(EGLConfig));

success = eglChooseConfig(display, g_configAttributes, configsArray, numberOfConfigs, &numberOfConfigs);

if (success != EGL_TRUE)

{

printf("Failed to enumerate EGL configs 3");

exit(1);

}

bool matchFound = false;

int matchingConfig = -1;

if (strictMatch)

{

* Loop through the EGL configs to find a color depth match.

* Note: This is necessary, since EGL considers a higher color depth than requested to be 'better'

* even though this may force the driver to use a slow color conversion blitting routine.

EGLint redSize = g_configAttributes[5];

EGLint greenSize = g_configAttributes[7];

EGLint blueSize = g_configAttributes[9];

for (int configsIndex = 0; (configsIndex < numberOfConfigs) && !matchFound; configsIndex++)

{

EGLint attributeValue = 0;

success = eglGetConfigAttrib(display, configsArray[configsIndex], EGL_RED_SIZE, &attributeValue);

if (success != EGL_TRUE)

{

printf("Failed to get EGL attribute");

exit(1);

}

if (attributeValue == redSize)

{

success = eglGetConfigAttrib(display, configsArray[configsIndex], EGL_GREEN_SIZE, &attributeValue);

if (success != EGL_TRUE)

{

printf("Failed to get EGL attribute 2");

exit(1);

}

if (attributeValue == greenSize)

{

success = eglGetConfigAttrib(display, configsArray[configsIndex], EGL_BLUE_SIZE, &attributeValue);

if (success != EGL_TRUE)

{

printf("Failed to get EGL attribute 3");

exit(1);

}

if (attributeValue == blueSize)

{

matchFound = true;

matchingConfig = configsIndex;

}

else

{

/* If not strict we can use any matching config. */

matchingConfig = 0;

matchFound = true;

}

if (!matchFound)

{

printf("Failed to find matching EGL config");

exit(1);

}

/* Return the matching config. */

EGLConfig configToReturn = configsArray[matchingConfig];

free(configsArray);

configsArray = NULL;

return configToReturn;

}

#define _GLCheck()\

GLenum glError = glGetError(); \

if(glError != GL_NO_ERROR) \

{ \

printf ("glGetError() = %i (0x%.8x) at line %i\n", glError, glError, __LINE__); \

} \

#define VERTEXPOS 1.0f

#define TEXTUREPOS 1.0f

GLfloat vVertices[] = {

-VERTEXPOS, VERTEXPOS, 0.0f, // Position 0

0.0f, 0.0f, // TexCoord 0

-VERTEXPOS, -VERTEXPOS, 0.0f, // Position 1

0.0f, TEXTUREPOS, // TexCoord 1

VERTEXPOS, -VERTEXPOS, 0.0f, // Position 2

TEXTUREPOS, TEXTUREPOS, // TexCoord 2

VERTEXPOS, VERTEXPOS, 0.0f, // Position 3

TEXTUREPOS, 0.0f, // TexCoord 3

};

const GLushort indices[] = { 0, 1, 2, 0, 2, 3 };

const char _VShaderSource_Blender[] =

"attribute vec4 a_position; \n"

"attribute vec2 a_texCoord; \n"

"varying vec2 v_texCoord; \n"

"void main() \n"

"{ \n"

" gl_Position = a_position; \n"

" v_texCoord = a_texCoord; \n"

"} \n";

const char _FShaderSource_Blender[] =

"precision mediump float; \n"

"uniform sampler2D InputTex; \n"

"varying vec2 v_texCoord; \n"

" \n"

"void main(void) \n"

"{ \n"

" //gl_FragColor=texture2D(InputTex,v_texCoord); \n"

" vec4 col=texture2D(InputTex,v_texCoord); \n"

" gl_FragColor=vec4(col.b, col.g, col.r, col.a); \n"

"} \n";

void UploadTexture_UsingTextSubImage2D(unsigned char *InPicture, GLuint _iTex)

{

glActiveTexture(GL_TEXTURE0);

glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

glBindTexture(GL_TEXTURE_2D, _iTex);

glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, WIDTH, HEIGHT, GL_RGBA, GL_UNSIGNED_BYTE, InPicture);

_GLCheck();

}

typedef enum

{

FBDEV_PIXMAP_DEFAULT = 0,

FBDEV_PIXMAP_SUPPORTS_UMP = (1 << 0),

FBDEV_PIXMAP_ALPHA_FORMAT_PRE = (1 << 1),

FBDEV_PIXMAP_COLORSPACE_sRGB = (1 << 2),

FBDEV_PIXMAP_EGL_MEMORY = (1 << 3) /* EGL allocates/frees this memory */

} fbdev_pixmap_flags;

typedef struct fbdev_window

{

unsigned short width;

unsigned short height;

} fbdev_window;

typedef struct fbdev_pixmap

{

unsigned int height;

unsigned int width;

unsigned int bytes_per_pixel;

unsigned char buffer_size;

unsigned char red_size;

unsigned char green_size;

unsigned char blue_size;

unsigned char alpha_size;

unsigned char luminance_size;

fbdev_pixmap_flags flags;

unsigned short *data;

unsigned int format; /* extra format information in case rgbal is not enough, especially for YUV formats */

} fbdev_pixmap;

void UploadTexture_UsingEGLImage(EGLDisplay sEGLDisplay, EGLContext sEGLContext, unsigned char *InPicture, GLuint _iTex)

{

fbdev_pixmap pixmap;

pixmap.height = HEIGHT;

pixmap.width = WIDTH;

pixmap.bytes_per_pixel = 4;

pixmap.buffer_size = 32;

pixmap.red_size = 8;

pixmap.green_size = 8;

pixmap.blue_size = 8;

pixmap.alpha_size = 8;

pixmap.luminance_size = 0;

pixmap.flags = FBDEV_PIXMAP_DEFAULT;

pixmap.data = (unsigned short*)InPicture;

pixmap.format = 1;

EGLImageKHR eglImage = eglCreateImageKHR(sEGLDisplay, sEGLContext, EGL_NATIVE_PIXMAP_KHR, &pixmap, NULL);

EGLint eglError = eglGetError();

if (eglError != EGL_SUCCESS)

printf("eglGetError() = %i (0x%.8x) at line %i\n", eglError, eglError, __LINE__);

glActiveTexture(GL_TEXTURE0);

glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

glBindTexture(GL_TEXTURE_2D, _iTex);

glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, eglImage);

_GLCheck();

}

int main(int argc, char **argv)

{

CAVWindow wind;

EGLDisplay m_sEGLDisplay;

EGLSurface m_sEGLSurface;

EGLContext m_sEGLContext;

EGLint major, minor;

GLuint m_iVShader, m_iFShader;

GLuint m_iProgram;

GLint m_iLocPosition;

GLint m_iLocTexCoord;

GLint iStatus;

m_sEGLDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY); assert(m_sEGLDisplay != EGL_NO_DISPLAY);

EGLBoolean success = eglInitialize(m_sEGLDisplay, &major, &minor); assert(success == EGL_TRUE);

printf ("major=%d, minor = %d\n", major, minor );

g_configAttributes[15] = EGL_OPENGL_ES2_BIT;

g_contextAttributes[1] = 2;

g_contextAttributes[2] = EGL_NONE;

g_config = findConfig(m_sEGLDisplay);

wind.CreaFinestra(WIDTH, HEIGHT, L"testEGLImage", 0, 0, m_sEGLDisplay, g_config);

m_sEGLSurface = eglCreateWindowSurface(m_sEGLDisplay, g_config, (EGLNativeWindowType)wind.GethWnd(), g_windowAttributes); assert(m_sEGLSurface != EGL_NO_SURFACE);

eglBindAPI(EGL_OPENGL_ES_API);

m_sEGLContext = eglCreateContext(m_sEGLDisplay, g_config, EGL_NO_CONTEXT, g_contextAttributes); assert(m_sEGLContext != EGL_NO_CONTEXT);

eglMakeCurrent(m_sEGLDisplay, m_sEGLSurface, m_sEGLSurface, m_sEGLContext);

printf ("Vendor =%s\n", eglQueryString(m_sEGLDisplay, EGL_VENDOR));

printf ("API =%s\n", eglQueryString(m_sEGLDisplay, EGL_CLIENT_APIS));

printf ("Version=%s\n", eglQueryString(m_sEGLDisplay, EGL_VERSION));

printf ("Extens =%s\n", eglQueryString(m_sEGLDisplay, EGL_EXTENSIONS));

const GLubyte *strExt = glGetString(GL_EXTENSIONS);

printf("GL_EXTENSIONS: %s\n", strExt);

glDisable(GL_CULL_FACE);

glDisable(GL_DEPTH_TEST);

glDisable(GL_DITHER);

glDisable(GL_POLYGON_OFFSET_FILL);

glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE);

glDisable(GL_SAMPLE_COVERAGE);

glDisable(GL_SCISSOR_TEST);

glDisable(GL_STENCIL_TEST);

glEnable(GL_BLEND);

glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

m_iVShader = glCreateShader(GL_VERTEX_SHADER);

m_iFShader = glCreateShader(GL_FRAGMENT_SHADER);

const char *pVShader = _VShaderSource_Blender;

const char *pFShader = _FShaderSource_Blender;

glShaderSource(m_iVShader, 1, &pVShader, NULL);

glShaderSource(m_iFShader, 1, &pFShader, NULL);

glCompileShader(m_iVShader);

glGetShaderiv(m_iVShader, GL_COMPILE_STATUS, &iStatus); assert(iStatus != GL_FALSE);

glCompileShader(m_iFShader);

glGetShaderiv(m_iFShader, GL_COMPILE_STATUS, &iStatus);assert(iStatus != GL_FALSE);

m_iProgram = glCreateProgram();

glAttachShader(m_iProgram, m_iVShader);

glAttachShader(m_iProgram, m_iFShader);

glLinkProgram(m_iProgram);

m_iLocPosition = glGetAttribLocation(m_iProgram, "a_position");

m_iLocTexCoord = glGetAttribLocation(m_iProgram, "a_texCoord");

_GLCheck();

GLuint iTex;

glGenTextures(1, &iTex);

glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

glBindTexture(GL_TEXTURE_2D, iTex);

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, WIDTH, HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

unsigned char *TexData = new unsigned char[WIDTH * HEIGHT * 4];

for (int iCycles = 0; iCycles < NCYCLES; iCycles++)

{

memset(TexData, 0, WIDTH * HEIGHT * 4);

for (int y = 0; y < HEIGHT; y++)

{

for (int x = iCycles; x < iCycles + 16; x++)

{

TexData[y * WIDTH * 4 + 4 * x + 0] = 255;

TexData[y * WIDTH * 4 + 4 * x + 1] = 255;

TexData[y * WIDTH * 4 + 4 * x + 2] = 255;

TexData[y * WIDTH * 4 + 4 * x + 3] = 255;

}

//UploadTexture_UsingTextSubImage2D(TexData, iTex);

UploadTexture_UsingEGLImage(m_sEGLDisplay, m_sEGLContext, TexData, iTex);

//draw

glUseProgram(m_iProgram);

GLint BlenderSamplerLocInput = glGetUniformLocation(m_iProgram, "InputTex");

glVertexAttribPointer(m_iLocTexCoord, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), &vVertices[3]);

glEnableVertexAttribArray(m_iLocTexCoord);

glActiveTexture(GL_TEXTURE0);

glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

glUniform1i(BlenderSamplerLocInput, 0);

glVertexAttribPointer(m_iLocPosition, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), vVertices);

glEnableVertexAttribArray(m_iLocPosition);

glBindTexture(GL_TEXTURE_2D, iTex);

glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);

GLenum glError = glGetError();

_GLCheck();

if (!eglSwapBuffers(m_sEGLDisplay, m_sEGLSurface))

printf("Failed to swap buffers.\n");

}

printf("typer enter\n");

getchar();

delete[] TexData;

//glClearColor(1.0, 1.0, 0.0, 1.0);

//glClear(GL_COLOR_BUFFER_BIT);

//glFlush();

//eglSwapBuffers(m_sEGLDisplay, m_sEGLSurface);

return 0;

}

====== AVWindow.h (create x11 window) =======

#pragma once

#include "assert.h"

#include "os_types.h"

#include <string>

#ifdef _WIN32

#ifndef WIN32_LEAN_AND_MEAN

#define WIN32_LEAN_AND_MEAN 1

#endif

#include <windows.h>

#include "CBaseThread.h"

class IAVWindowCBF

{

public:

virtual void OnEnd() {};

};

class CAVWindow : public CBaseThread

{

int m_cx, m_cy, m_PosX, m_PosY;

std::wstring m_windowName;

HWND m_hwnd;

void OnInit()

{

const HINSTANCE hInstance = NULL;

WNDCLASS wc;

* set up and register window class

wc.style = CS_HREDRAW | CS_VREDRAW;

wc.lpfnWndProc = WindowProc;

wc.cbClsExtra = 0;

wc.cbWndExtra = 0;

wc.hInstance = hInstance;

wc.hIcon = LoadIcon(hInstance, IDI_APPLICATION);

wc.hCursor = LoadCursor(NULL, IDC_ARROW);

wc.hbrBackground = NULL;

wc.lpszMenuName = NULL;

wc.lpszClassName = m_windowName.c_str();

RegisterClass(&wc);

* create a window

RECT rc = { 0, 0, m_cx, m_cy };

AdjustWindowRect(&rc, WS_OVERLAPPEDWINDOW, FALSE);

m_hwnd = CreateWindowEx(

NULL,

m_windowName.c_str(),

WS_OVERLAPPEDWINDOW,

m_PosX,

m_PosY,

rc.right - rc.left,

rc.bottom - rc.top,

NULL,

hInstance,

NULL);

assert(m_hwnd);

SetWindowLongPtr(m_hwnd, GWLP_USERDATA, (LONG)this);

ShowWindow(m_hwnd, SW_SHOW);

}

void DoLoop()

{

MSG Msg;

//here we force queue creation. Very important, this must be done before sending any message...

PeekMessage(&Msg, NULL, WM_USER, WM_USER, PM_NOREMOVE);

while (GetMessage(&Msg, NULL, 0, 0))

{

TranslateMessage(&Msg);

DispatchMessage(&Msg);

}

};

void OnEnd()

{

DestroyWindow(m_hwnd);

}

static LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)

{

CAVWindow *pThis = (CAVWindow *)GetWindowLongPtr(hWnd, GWLP_USERDATA);

long r = pThis->MyWindowProc(hWnd, message, wParam, lParam);

return r;

}

long MyWindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)

{

switch (message)

{

case WM_CLOSE:

//PostQuitMessage(0);

return 0;

case WM_PAINT:

return 0; //break;

}

return (long)DefWindowProc(hWnd, message, wParam, lParam);

}

public:

CAVWindow()

{

m_hwnd = NULL;

}

~CAVWindow()

{

}

void CreaFinestra(int cx, int cy, const std::wstring &wName, int posx, int posy)

{

m_cx = cx;

m_cy = cy;

m_windowName = wName;

m_PosX = posx;

m_PosY = posy;

Start();

}

void ChiudiFinestra()

{

if (m_bThreadRunning)

{

PostThreadMessage(m_ThreadId, WM_QUIT, 0, 0);

WaitThreadEnded();

}

HWND GethWnd()

{

return m_hwnd;

}

};

#else

#include <stdio.h>

#include <stdlib.h>

#include <X11/Xlib.h>

#include "EGL/egl.h"

class CAVWindow

{

int m_cx, m_cy, m_PosX, m_PosY;

std::wstring m_windowName;

Colormap m_colormap;

XVisualInfo *m_visual;

Window m_window;

Display* m_display;

static Bool wait_for_map(Display *display, XEvent *event, char *windowPointer)

{

return (event->type == MapNotify && event->xmap.window == (*((Window*)windowPointer)));

}

public:

CAVWindow()

{

}

~CAVWindow()

{

}

void CreaFinestra(int windowWidth, int windowHeight, const std::wstring &wName, int posx, int posy, EGLDisplay eglDisplay, EGLConfig config)

{

XSetWindowAttributes windowAttributes;

XSizeHints sizeHints;

XEvent event;

XVisualInfo visualInfoTemplate;

unsigned long mask;

long screen;

int visualID, numberOfVisuals;

m_display = XOpenDisplay(NULL);

screen = DefaultScreen(m_display);

eglGetConfigAttrib(eglDisplay, config, EGL_NATIVE_VISUAL_ID, &visualID);

visualInfoTemplate.visualid = visualID;

m_visual = XGetVisualInfo(m_display, VisualIDMask, &visualInfoTemplate, &numberOfVisuals);

if (m_visual == NULL)

{

printf("Couldn't get X visual info\n");

throw "Couldn't get X visual info";

}

m_colormap = XCreateColormap(m_display, RootWindow(m_display, screen), m_visual->visual, AllocNone);

windowAttributes.colormap = m_colormap;

windowAttributes.background_pixel = 0xFFFFFFFF;

windowAttributes.border_pixel = 0;

windowAttributes.event_mask = StructureNotifyMask | ExposureMask;

mask = CWBackPixel | CWBorderPixel | CWEventMask | CWColormap;

m_window = XCreateWindow(m_display, RootWindow(m_display, screen), 0, 0, windowWidth, windowHeight,

0, m_visual->depth, InputOutput, m_visual->visual, mask, &windowAttributes);

sizeHints.flags = USPosition;

sizeHints.x = 10;

sizeHints.y = 10;

XSetStandardProperties(m_display, m_window, "Mali OpenGL ES SDK", "", None, 0, 0, &sizeHints);

XMapWindow(m_display, m_window);

XIfEvent(m_display, &event, wait_for_map, (char*)(&m_window));

XSetWMColormapWindows(m_display, m_window, &m_window, 1);

XFlush(m_display);

XSelectInput(m_display, m_window, KeyPressMask | ExposureMask | EnterWindowMask

| LeaveWindowMask | PointerMotionMask | VisibilityChangeMask | ButtonPressMask

| ButtonReleaseMask | StructureNotifyMask);

}

void ChiudiFinestra()

{

XDestroyWindow(m_display, m_window);

XFreeColormap(m_display, m_colormap);

XFree(m_visual);

XCloseDisplay(m_display);

}

HWND GethWnd()

{

return (unsigned long)m_window;

}

};

#endif

{
	Window root;
	int x, y;
	unsigned int border, d, w, h;
	const EGLint img_attribs[] = {
		EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
		EGL_NONE
	};

	fbdev_pixmap pm;
	pm.height = HEIGHT;
	pm.width = WIDTH;
	pm.bytes_per_pixel = 32;
	pm.red_size = 8;
	pm.green_size = 8;
	pm.blue_size = 8;
	pm.alpha_size = 8;
	pm.luminance_size = 0;
	pm.flags = FBDEV_PIXMAP_SUPPORTS_UMP;
	pm.data = (unsigned short*)TexData;

	static EGLImageKHR g_eglImage = 0;
	if (g_eglImage)
		eglDestroyImageKHR(g_sEGLDisplay, g_eglImage);
	g_eglImage = eglCreateImageKHR(g_sEGLDisplay, EGL_NO_CONTEXT, EGL_NATIVE_PIXMAP_KHR, (EGLClientBuffer)&pm, img_attribs);
	EGLint eglError = eglGetError(); ==> 0x300c