Implementation of the image display tool in QNX Character Mode

I. Environment preparation

Start io-Display

Io-display-v-dvid = 0x8086, vid = 8108

 

2. Project Settings

Add/usr/libgf. So and/lib/libimg. So to the project's linker External library.

 

Iii. Code

# Include <stdlib. h> <br/> # include <stdio. h> <br/> # include <string. h> <br/> # include <GF/GF. h> <br/> # include <br/> # define dev_attach_error-1 <br/> # define display_attach_error-2 <br/> # define display_null-3 <br/> # define layer_attach_error-4 <br /># define surface_create_error-5 <br/> # define context_create_error-6 <br/> # define surface_set_error-7 <br/> int setup (gf_dev_t * p_gdev, gf_disp Lay_t * p_display, implements * p_layer, gf_surface_t * p_surface, implements * p_context); <br/> int draw (gf_dev_t * p_gdev, implements * p_layer, implements * p_surface, gf_context_t * p_context, char * p_imgname); <br/> void dispose (gf_dev_t * p_gdev, gf_display_t * p_display, gf_layer_t * p_layer, gf_surface_t * p_surface, gf_context_t * p_context ); <br/> gf_format_t img_fmt_to_gf (img_format_t img_format ); <Br/> int main (INT argc, char * argv []) {<br/> int result = 0; <br/> // graphics variable <br/> gf_dev_t gdev; <br/> gf_display_t display; <br/> gf_layer_t layer; <br/> gf_surface_t surface; <br/> gf_context_t context; <br/> char * imgname; <br/> // parameter check <br/> If (argc! = 2) {<br/> printf ("image file name missing/N"); <br/> return exit_failure; <br/>}< br/> imgname = argv [1]; <br/> result = setup (& gdev, & display, & layer, & surface, & context ); <br/> If (result = exit_success) {<br/> result = draw (& gdev, & layer, & surface, & context, imgname ); <br/>}< br/> while (1) {<br/> sleep (99999); <br/>}< br/> dispose (& gdev, & display, & layer, & surface, & context); <br/> return exit_succe SS; <br/>}< br/> int setup (gf_dev_t * p_gdev, gf_display_t * p_display, gf_layer_t * p_layer, gf_surface_t * p_surface, gf_context_t * p_context) {<br/> int result; <br/> gf_dev_info_t gdev_info; <br/> gf_display_info_t display_info; <br/> // attaching to a device <br/> result = gf_dev_attach (p_gdev, gf_device_index (0), & gdev_info); <br/> If (result! = Gf_err_ OK) {<br/> printf ("gf_dev_attach () failed [% d]/n", result); <br/> return dev_attach_error; <br/>}< br/> // printf ("Number of displays: % d/N", gdev_info.ndisplays); <br/> // int I; <br/> // for (I = 0; I <gdev_info.ndisplays; I ++) {<br/> // printf ("display % d:", I ); <br/> // If (gf_display_attach (p_display, * p_gdev, I, & display_info) = gf_err_ OK) {<br/> // printf ("% DX % d, refresh = % DHZ/N ", display_ I Nfo. xres, <br/> // display_info.yres, display_info.refresh); <br/> // printf ("number of layers: % d/N", display_info.nlayers ); <br/> //} else {<br/> // printf ("gf_display_attach () failed/N "); <br/> //} <br/> result = gf_display_attach (p_display, * p_gdev, 0, & display_info ); <br/> If (result! = Gf_err_ OK) {<br/> printf ("gf_display_attach () failed [% d]/n", result); <br/> return display_attach_error; <br/>}< br/> If (* p_display = NULL) {<br/> printf ("display is null/N"); <br/> return display_null; <br/>}< br/> // attaching to a display layer <br/> result = gf_layer_attach (p_layer, * p_display, display_info.main_layer_index, gf_layer_attach_passive ); <br/> If (result! = Gf_err_ OK) {<br/> printf ("gf_layer_attach () failed [% d]/n", result); <br/> return layer_attach_error; <br/>}< br/> // create and set surfaces <br/> result = gf_surface_create_layer (p_surface, p_layer, 1, 0, display_info.xres, display_info.yres, display_info.format, null, 0); <br/> If (result! = Gf_err_ OK) {<br/> printf ("gf_surface_create_layer () failed [% d]/n", result); <br/> return surface_create_error; <br/>}< br/> gf_layer_set_surfaces (* p_layer, p_surface, 1); <br/> // create context <br/> result = gf_context_create (p_context ); <br/> If (result! = Gf_err_ OK) {<br/> printf ("gf_context_create () failed [% d]/n", result); <br/> return context_create_error; <br/>}< br/> // set surface <br/> result = gf_context_set_surface (* p_context, * p_surface); <br/> If (result! = Gf_err_ OK) {<br/> printf ("gf_context_create () failed [% d]/n", result); <br/> return surface_set_error; <br/>}< br/> return exit_success; <br/>}< br/> int draw (gf_dev_t * p_gdev, gf_layer_t * p_layer, gf_surface_t * p_surface, gf_context_t * p_context, char * p_imgname) {<br/> int result; <br/> img_lib_t ilib = NULL; <br/> img_t IMG; <br/> gf_palette_t palette; <br/> // begin draw <br/> result = gf_draw_begin (* P_context); <br/> If (result! = Gf_err_ OK) {<br/> printf ("gf_draw_begin () failed [% d]/n", result); <br/> return-1; <br/>}< br/> /// draw something <br/> // gf_context_set_fgcolor (* p_context, 0 xffffff ); <br/> // gf_draw_rect (* p_context, 10, 10, 50, 50); <br/> // gf_context_set_fgcolor (* p_context, 0x000000 ); <br/> // gf_draw_rect (* p_context, 20, 40, 40); <br/> /// draw line <br/> // gf_context_set_fgcolor (* p_context, 0x0000ff ); <br/> // gf_point_t PTS [3]; <br/> // PTS [0]. X = 10; <br/> // PTS [0]. y = 100; <br/> // PTS [1]. X = 150; <br/> // PTS [1]. y = 250; <br/> // PTS [2]. X = 200; <br/> // PTS [2]. y = 100; <br/> // gf_context_set_penwidth (* p_context, 10); <br/> // gf_context_set_linejoin (* p_context, gf_context_linejoin_round ); <br/> // gf_draw_polyline (* p_context, PTS, 3, 0); <br/> // gf_context_set_fgcolor (* p_context, 0x000000 ); // black <br/> // gf_context_set_penw Idth (* p_context, 3); <br/> // gf_draw_polyline (* p_context, PTS, 3, 0); <br/> // PTS [1]. X = 100; <br/> // PTS [1]. y = 260; <br/> // PTS [0]. y = 400; <br/> // PTS [2]. X = 200; <br/> // PTS [2]. y = 400; <br/> // gf_context_set_antialias (* p_context, 1); <br/> // gf_context_set_fgcolor (* p_context, 0x0000ff ); <br/> // gf_context_set_penwidth (* p_context, 2); <br/> // gf_draw_polyline (* p_context, PTS, 3, 0); <br/> // load Image Library <br/> result = img_lib_attach (& ilib); <br/> If (result! = Img_err_ OK) {<br/> printf ("img_lib_attach () failed [% d]/n", result); <br/> return-1; <br/>}< br/> // Initialize an img_t by setting its flags to 0 <br/> IMG. flags = 0; <br/>/* If we want, we can preselect a format (ie force the image to be <br/> loaded in the format we specify) by enabling the following two <br/> lines */<br/> IMG. format = img_fmt_pkle_xrgb8888; <br/> IMG. flags | = img_format; <br/> /* Likewise, we can 'clip' the loaded image by enabling the following */<br/> IMG. W = 800; <br/> IMG. flags | = img_w; <br/> IMG. H = 480; <br/> IMG. flags | = img_h; <br/> result = img_load_file (ilib, p_imgname, null, & IMG); <br/> If (result! = Img_err_ OK) {<br/> printf ("img_load_file (% s) failed: % d/N", p_imgname, result); <br/> return-1; <br/>}< br/> // printf ("IMG is % DX % d/N", IMG. w, IMG. h, img_fmt_bpp (IMG. format); <br/>/* for our purposes we ''re done with the IMG lib */<br/> img_lib_detach (ilib ); <br/> // attaching to a surface <br/> If (IMG. format & img_fmt_palette) {<br/>/* setup palette if necessary */<br/> palette. ncolors = IMG. Npalette; <br/> palette. colors = IMG. palette; <br/>} else if (IMG. format = img_fmt_g8) {<br/>/* We can render G8 images in GF by using a palette of grays */<br/> palette. ncolors = 256; <br/> printf ("IMG. format = img_fmt_g8/N "); <br/> // palette. colors = (img_color_t *) g8pal; <br/> palette. colors = IMG. palette; <br/>}< br/>/* attach a surface to the image data; this allows us to BWS the image <br/> d ATA to another surface (or the display) in GF */<br/> result = gf_surface_attach (p_surface, * p_gdev, IMG. w, IMG. h, IMG. access. direct. stride, <br/> img_fmt_to_gf (IMG. format), & palette, IMG. access. direct. data, 0); <br/> If (result! = Gf_err_ OK) {<br/> printf ("gf_surface_attach () failed: % d/N", result ); <br/>/* might fail here if the decoder gave us a format that cannot <br/> map to GF; in this case we cocould have preselected a format <br/> that is supported by GF (code above shows how to do this) */<br/> return-1; <br/>}< br/> If (IMG. flags & img_transparency) {<br/>/* We can handle transparency in GF using chroma */<br/> Gf_chroma_t chroma; <br/> memset (& chroma, 0, sizeof chroma); <br/> chroma. mode = gf_chroma_op_src_match | gf_chroma_op_no_draw; <br/> If (IMG. format & img_fmt_palette) {<br/> chroma. color0 = IMG. palette [img. transparency. index]; <br/>} else if (img_fmt_bpp (IMG. format) <24) {<br/> chroma. color0 = IMG. transparency. rgb16; <br/>}else {<br/> chroma. color0 = IMG. transparency. rgb32; <br/>}< br/> Gf_context_set_chroma (* p_context, & chroma); <br/>}< br/> If (IMG. format & img_fmt_alpha) {<br/> gf_alpha_t Alpha; <br/> memset (α, 0, sizeof alpha); <br/> alpha. mode = gf_alpha_m1_src_pixel_alpha | gf_blend_src_m1 | <br/> gf_blend_dst_1mm1; <br/> gf_context_set_alpha (* p_context, α ); <br/>}< br/> // BThe the image onto a target surface <br/> gf_draw_blit2 (* p_context, * p_surface, null, 0, 0, IMG. w-1, IMG. h-1, 0, 0); <br/> // finish draw <br/> gf_draw_flush (* p_context); <br/> result = gf_draw_finish (* p_context ); <br/> If (result! = Gf_err_ OK) {<br/> printf ("gf_draw_finish () failed [% d]/n", result); <br/> return-1; <br/>}< br/> gf_draw_end (* p_context); <br/> gf_layer_update (* p_layer, 0); <br/> If (IMG. format & img_fmt_alpha) {<br/> gf_context_disable_alpha (* p_context); <br/>}< br/> If (IMG. flags & img_transparency) {<br/> gf_context_disable_chroma (* p_context); <br/>}< br/> free (IMG. access. direct. data); <br/> gf_context_free (* p_context); <br/> gf_surface_free (* p_surface); <br/> gf_layer_detach (* p_layer); <br/> return exit_success; <br/>}< br/> void dispose (gf_dev_t * p_gdev, gf_display_t * p_display, gf_layer_t * p_layer, gf_surface_t * p_surface, gf_context_t * p_context) {<br/> // free resource <br/> gf_display_detach (* p_display); <br/> gf_dev_detach (* p_gdev ); <br/>}< br/> gf_format_t img_fmt_to_gf (img_format_t img_format) {<br/> // printf ("img_fmt_to_gf (% d)/n", img_format ); <br/> switch (img_format) {<br/> case img_fmt_invalid: <br/> return gf_format_invalid; <br/> case img_fmt_mono: <br/> return gf_format_byte; <br/> case img_fmt_g8: <br/> return gf_format_pal8; <br/> case img_fmt_a8: <br/> return gf_format_pal8; <br/> case img_fmt_pal1: <br/> return gf_format_pal8; <br/> case img_fmt_pal4: <br/> return gf_format_pal8; <br/> case img_fmt_pal8: <br/> return gf_format_pal8; <br/> case when: <br/> return gf_format_pkle_rgb565; <br/> case when: <br/> return gf_format_pkbe_rgb565; <br/> case img_fmt_pkle_argb1555: <br/> return gf_format_pack_argb1555; <br/> case when: <br/> return gf_format_pack_argb1555; <br/> case when: <br/> return gf_format_pkle_argb1555; <br/> case when: <br/> return gf_format_pkbe_argb1555; <br/> case img_fmt_bgr888: <br/> return gf_format_bgr888; <br/> case img_fmt_rgb888: <br/> return gf_format_bgra8888; <br/> case img_fmt_pkle_abgr8888: <br/> return gf_format_argb8888; <br/> case when: <br/> return gf_format_argb8888; <br/> case when: <br/> return gf_format_argb8888; <br/> case when: <br/> return gf_format_argb8888; <br/> case img_fmt_pkle_argb8888: <br/> return gf_format_argb8888; <br/> case img_fmt_pkbe_argb8888: <br/> return gf_format_argb8888; <br/> case when: <br/> return gf_format_bgra8888; <br/> case img_fmt_pkbe_xrgb8888: <br/> return gf_format_bgra8888; <br/> case img_fmt_yuv888: <br/> return gf_format_pkbe_yuv_v422; <br/>}< br/> // default 32 <br/> return gf_format_bgra8888; <br/>}

 

4. execute shell

#! /Bin/sh

/Mnt/showimage/usr/mcy/images/background-1.png &
Sleep 5
Pro_simg = 'ps-A | grep showimage | awk '{print $1 }''
/Mnt/showimage/usr/mcy/images/background-2.png &
Sleep 1
Slay $ pro_simg;
Sleep 10
Slay showimage