Native Development

[MindOperations]

I am very confused on how to load this.

I understand the documentations code:

img_lib_t ilib = NULL;
int rc;
rc = img_lib_attach(&ilib);

How do I attach img_codec_png.so  so it doesnt give me a undefined reference error.  I am a bit confused on what the documentation says on the config file in reference to this funtion.

I am trying to insert it into the main function for a learning file I have been working on. If I solve this I believe it will help me with the img_load_file() error im recieving.  The working code is below that will give you a black parent window and groups a child window to it.  The child is not defined or pushed to the screen yet.(Excuse the if case funtions,  trying to practice smart coding practices.)

#include <screen/screen.h>
#include <stdlib.h>	
#include <stdio.h>
#include <img/img.h>

screen_context_t	homeContext = 0;
screen_window_t		homeWindow = 0;//parent window
static const char 	*homeGroup = "Home Windows";
screen_buffer_t		homeBuffer;
int hformat_w 	= SCREEN_FORMAT_RGBA8888;
int husage_w	= SCREEN_USAGE_NATIVE;
int hvis		= 0;		
int hcolor		= 0xff000000;
int hshap[4]	= {0, 0, 1, 1};	
int hdims[2]	= {0, 0};	
int hcount = 0;		

screen_window_t		hcscreen_w = 0;//child window

int main()
{
	if(screen_create_context(&homeContext, SCREEN_APPLICATION_CONTEXT) != 0)
	{
		return EXIT_FAILURE;
	}

	if(screen_create_window(&homeWindow, homeContext) != 0)
	{
		screen_destroy_context(homeContext);
		return EXIT_FAILURE;
	}

	if(screen_create_window_group(homeWindow, homeGroup) != 0)
	{
		return EXIT_FAILURE;
	}

	if(screen_set_window_property_iv(homeWindow, SCREEN_PROPERTY_FORMAT, &hformat_w) != 0)
	{
		return EXIT_FAILURE;
	}

	if(screen_set_window_property_iv(homeWindow, SCREEN_PROPERTY_USAGE, &husage_w) != 0)
	{
		return EXIT_FAILURE;
	}

	if(screen_set_window_property_iv(homeWindow, SCREEN_PROPERTY_VISIBLE, &hvis) != 0)
	{
		return EXIT_FAILURE;
	}

	if(screen_set_window_property_iv(homeWindow, SCREEN_PROPERTY_BUFFER_SIZE, hshap+2) != 0)
	{
		return EXIT_FAILURE;
	}

	screen_get_context_property_iv(homeContext, SCREEN_PROPERTY_DISPLAY_COUNT, &hcount);

	screen_display_t *hdisps = calloc(hcount, sizeof(screen_display_t));
	screen_get_context_property_pv(homeContext, SCREEN_PROPERTY_DISPLAYS, (void **)hdisps);

	screen_display_t hdisp = hdisps[0];
	free(hdisps);

	screen_get_display_property_iv(hdisp, SCREEN_PROPERTY_SIZE, hdims);

	if(screen_set_window_property_iv(homeWindow, SCREEN_PROPERTY_COLOR, &hcolor) != 0)
	{
		return EXIT_FAILURE;
	}

	if(screen_set_window_property_iv(homeWindow, SCREEN_PROPERTY_SOURCE_SIZE, hdims) != 0)
	{
		return EXIT_FAILURE;
	}
	int hpos[2] = { -hdims[0], -hdims[1] };
	screen_set_window_property_iv(homeWindow, SCREEN_PROPERTY_SOURCE_POSITION, hpos);

	if(screen_create_window_buffers(homeWindow, 1) != 0)
	{
		return EXIT_FAILURE;
	}

	screen_get_window_property_pv(homeWindow, SCREEN_PROPERTY_RENDER_BUFFERS, (void **)&homeBuffer);
	screen_post_window(homeWindow, homeBuffer, 1, hshap, 0);


	if(screen_create_context(&homeContext, SCREEN_APPLICATION_CONTEXT) != 0)
	{
		return EXIT_FAILURE;
	}

	if(screen_create_window_type(&hcscreen_w, homeContext, SCREEN_CHILD_WINDOW) != 0)
	{
		screen_destroy_context(homeContext);
		return EXIT_FAILURE;
	}

	if(screen_join_window_group(hcscreen_w, homeGroup))
	{
		return EXIT_FAILURE;
	}
	
	if(screen_destroy_window(homeWindow) != 0)
	{
		return EXIT_FAILURE;
	}

	if(screen_destroy_context(homeContext) != 0)
	{
		return EXIT_FAILURE;
	}
	
return 0;
}

[MindOperations]

I understand how the img_lib_t points the config file to ilib variable.  This still wont work, I have the the nutrino img.h header included.  The error I keep getting makes it seem like the file or library isnt there.  Any suggestions???

[smcveigh · Accepted solution]

You need to link against libimg.  Add "img" to your list of libraries.

[MindOperations]

Thank you very much.  Your answer makes sense to my belief something isnt being included.  

Now for the beginers question how do I add this link to the library, sorry.  I am not able to try this out currently perhaps later but I would assum I simply add the lin "-l img" after clicking the new button in linked libraries?

[smcveigh · Accepted solution]

Under Project->Properties:

C/C++ Build

Settings

QCC Linker

Libraries

Click the + and add "img"

[MindOperations]

Dont have my playbook to test simlation but ide recognizes the load funtion!  Thanks!!!