qi-hardware/imgv
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Code

update to 0.2.1

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Signed-off-by: Xiangfu Liu <xiangfu@sharism.cc>
This commit is contained in:
Xiangfu Liu 2010-05-30 23:11:43 +08:00
parent 3cf62be38d
commit f4ff893123
1 changed files with 68 additions and 28 deletions
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96
sdl-imageviewer.c
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@ -1,6 +1,6 @@
// imgv, a simple SDL-based image viewer for the Ben Nanonote // imgv, a simple SDL-based image viewer for the Ben Nanonote
// Version 0.2.0 // Version 0.2.1
// Last edited by Fernando Carello <fcarello@libero.it> 2010-05-21 // Last edited by Fernando Carello <fcarello@libero.it> 2010-05-24
// //
#include <stdlib.h> #include <stdlib.h>
#include <unistd.h> #include <unistd.h>
@ -43,7 +43,7 @@ int main(int argc, char *argv[])
upPressed, upPressed,
downPressed; downPressed;
char sFilename[255] = "\0", char sFilename[255] = "\0",
sVersion[] = "0.2.0"; sVersion[] = "0.2.1";
double scale_x = 1.0, double scale_x = 1.0,
scale_y = 1.0, scale_y = 1.0,
scale = 1.0; scale = 1.0;
@ -67,13 +67,34 @@ int main(int argc, char *argv[])
} }
// Load Picture // Load Picture
picture = IMG_Load(sFilename); temp_img = IMG_Load(sFilename);
if (temp_img == (SDL_Surface *) (NULL))
if (picture == (SDL_Surface *) (NULL))
{ {
fprintf(stderr, "\n Couldn't load image file %s: %s\n\n", sFilename, SDL_GetError()); fprintf(stderr, "\n Couldn't load image file %s: %s\n\n", sFilename, SDL_GetError());
exit (1); exit (1);
} }
// Set video mode
screen = SDL_SetVideoMode
(SCREENWIDTH, SCREENHEIGHT, SCREENBPP, SDL_DOUBLEBUF | SDL_HWSURFACE | SDL_HWACCEL);
if (screen == (SDL_Surface *) (NULL))
{
fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n\n", SCREENWIDTH, SCREENHEIGHT, SCREENBPP, SDL_GetError());
exit(1);
}
// Can't stand the useless arrow... Ben has no pointing device
SDL_ShowCursor(SDL_DISABLE);
// Convert picture in same format as video framebuffer, to optimize blit performances
picture = SDL_DisplayFormat (temp_img);
if (picture == (SDL_Surface *) (NULL))
{
fprintf(stderr, "\n Internal error from DisplayFormat\n\n");
exit (1);
}
SDL_FreeSurface (temp_img);
imgWidth = picture->w; imgWidth = picture->w;
imgHeight = picture->h; imgHeight = picture->h;
@ -90,16 +111,6 @@ int main(int argc, char *argv[])
fprintf (stderr, "\n Error from zoomSurface()\n\n"); fprintf (stderr, "\n Error from zoomSurface()\n\n");
exit (1); exit (1);
} }
screen = SDL_SetVideoMode
(SCREENWIDTH, SCREENHEIGHT, SCREENBPP, SDL_DOUBLEBUF | SDL_HWSURFACE | SDL_HWACCEL);
if (screen == (SDL_Surface *) (NULL))
{
fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n\n", SCREENWIDTH, SCREENHEIGHT, SCREENBPP, SDL_GetError());
exit(1);
}
SDL_ShowCursor(SDL_DISABLE); // Can't stand the useless arrow... Ben has no pointing device
screenPortion.x = 0; // destination coordinates: origin screenPortion.x = 0; // destination coordinates: origin
screenPortion.y = 0; screenPortion.y = 0;
@ -128,7 +139,6 @@ int main(int argc, char *argv[])
while(1) while(1)
{ {
if (SDL_WaitEvent( &event )) if (SDL_WaitEvent( &event ))
{ {
// We only process SDL_KEYDOWN and SDL_KEYUP events // We only process SDL_KEYDOWN and SDL_KEYUP events
@ -250,7 +260,13 @@ int main(int argc, char *argv[])
pixelFit = TRUE; pixelFit = TRUE;
picturePortion.w = (Uint16) SCREENWIDTH; picturePortion.w = (Uint16) SCREENWIDTH;
picturePortion.h = (Uint16) SCREENHEIGHT; picturePortion.h = (Uint16) SCREENHEIGHT;
scale = 1.0;
scaled_img = SDL_ConvertSurface (picture, picture->format, picture->flags); scaled_img = SDL_ConvertSurface (picture, picture->format, picture->flags);
if (scaled_img == (SDL_Surface *) (NULL))
{
fprintf (stderr, "\n Error from ConvertSurface()\n\n");
exit (1);
}
} }
if (iPressed) if (iPressed)
{ // Zoom in { // Zoom in
@ -260,8 +276,18 @@ int main(int argc, char *argv[])
pixelFit = FALSE; pixelFit = FALSE;
scale += ZOOMSTEP; scale += ZOOMSTEP;
picturePortion.w = (Uint16) ((double) (imgWidth) * scale); picturePortion.w = (Uint16) ((double) (imgWidth) * scale);
if ( (picturePortion.w - picturePortion.x) >= imgWidth )
picturePortion.w = imgWidth - picturePortion.x;
if (picturePortion.w < 1)
picturePortion.w = 1;
picturePortion.h = (Uint16) ((double) (imgHeight) * scale); picturePortion.h = (Uint16) ((double) (imgHeight) * scale);
if ( (picturePortion.h - picturePortion.y) >= imgHeight )
picturePortion.h = imgHeight - picturePortion.y;
if (picturePortion.h < 1)
picturePortion.h = 1;
scaled_img = zoomSurface (picture, scale, scale, smoothing); scaled_img = zoomSurface (picture, scale, scale, smoothing);
//scaled_img = rotozoomSurface (picture, 0, scale, SMOOTHING_ON);
if (scaled_img == (SDL_Surface *) (NULL)) if (scaled_img == (SDL_Surface *) (NULL))
{ {
fprintf (stderr, "\n Error from zoomSurface()\n\n"); fprintf (stderr, "\n Error from zoomSurface()\n\n");
@ -275,11 +301,21 @@ int main(int argc, char *argv[])
alreadyFit = FALSE; alreadyFit = FALSE;
pixelFit = FALSE; pixelFit = FALSE;
scale -= ZOOMSTEP; scale -= ZOOMSTEP;
if (scale < 0) if (scale <= 0.0)
scale = 0; scale = 0.01;
picturePortion.w = (Uint16) ((double) (imgWidth) * scale); picturePortion.w = (Uint16) ((double) (imgWidth) * scale);
if ( (picturePortion.w - picturePortion.x) >= imgWidth)
picturePortion.w = imgWidth - picturePortion.x;
if (picturePortion.w < 1)
picturePortion.w = 1;
picturePortion.h = (Uint16) ((double) (imgHeight) * scale); picturePortion.h = (Uint16) ((double) (imgHeight) * scale);
if ( (picturePortion.h - picturePortion.y) >= imgHeight )
picturePortion.h = imgHeight - picturePortion.y;
if (picturePortion.h < 1)
picturePortion.h = 1;
scaled_img = zoomSurface (picture, scale, scale, smoothing); scaled_img = zoomSurface (picture, scale, scale, smoothing);
//scaled_img = rotozoomSurface (picture, 0, scale, SMOOTHING_ON);
if (scaled_img == (SDL_Surface *) (NULL)) if (scaled_img == (SDL_Surface *) (NULL))
{ {
fprintf (stderr, "\n Error from zoomSurface()\n\n"); fprintf (stderr, "\n Error from zoomSurface()\n\n");
@ -292,14 +328,16 @@ int main(int argc, char *argv[])
if (scaled_img != (SDL_Surface *) (NULL)) if (scaled_img != (SDL_Surface *) (NULL))
temp_img = scaled_img; temp_img = scaled_img;
else else
temp_img = picture; {
fprintf (stderr, "\n Error: NULL scaled_img\n\n");
exit (1);
}
alreadyFit = FALSE; alreadyFit = FALSE;
scaled_img = rotozoomSurface (temp_img, -90, 1.0, SMOOTHING_OFF); scaled_img = rotozoomSurface (temp_img, -90, 1.0, SMOOTHING_OFF);
if (temp_img != picture) SDL_FreeSurface (temp_img);
SDL_FreeSurface (temp_img);
if (scaled_img == (SDL_Surface *) (NULL)) if (scaled_img == (SDL_Surface *) (NULL))
{ {
fprintf (stderr, "\n Error from zoomSurface()\n\n"); fprintf (stderr, "\n Error from rotozoomSurface()\n\n");
exit (1); exit (1);
} }
} }
@ -308,14 +346,16 @@ int main(int argc, char *argv[])
if (scaled_img != (SDL_Surface *) (NULL)) if (scaled_img != (SDL_Surface *) (NULL))
temp_img = scaled_img; temp_img = scaled_img;
else else
temp_img = picture; {
fprintf (stderr, "\n Error: NULL scaled_img\n\n");
exit (1);
}
alreadyFit = FALSE; alreadyFit = FALSE;
scaled_img = rotozoomSurface (temp_img, 90, 1.0, SMOOTHING_OFF); scaled_img = rotozoomSurface (temp_img, 90, 1.0, SMOOTHING_OFF);
if (temp_img != picture) SDL_FreeSurface (temp_img);
SDL_FreeSurface (temp_img);
if (scaled_img == (SDL_Surface *) (NULL)) if (scaled_img == (SDL_Surface *) (NULL))
{ {
fprintf (stderr, "\n Error from zoomSurface()\n\n"); fprintf (stderr, "\n Error from rotozoomSurface()\n\n");
exit (1); exit (1);
} }
} }
@ -349,7 +389,7 @@ int main(int argc, char *argv[])
alreadyFit = FALSE; alreadyFit = FALSE;
} }
SDL_FillRect(screen, NULL, 0); // draw background color (black) SDL_FillRect(screen, (SDL_Rect *) NULL, 0); // draw background color (black)
SDL_BlitSurface(scaled_img, &picturePortion, screen, &screenPortion); SDL_BlitSurface(scaled_img, &picturePortion, screen, &screenPortion);
SDL_Flip(screen); SDL_Flip(screen);
} // end of if(SDL_WaitEvent()) } // end of if(SDL_WaitEvent())