test/testbitmap.c
changeset 0 74212992fb08
child 691 609543e2b3a1
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/testbitmap.c	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,147 @@
+
+/* Simple program:  Test bitmap blits */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "SDL.h"
+#include "picture.xbm"
+
+SDL_Surface *LoadXBM(SDL_Surface *screen, int w, int h, Uint8 *bits)
+{
+	SDL_Surface *bitmap;
+	Uint8 *line;
+
+	/* Allocate the bitmap */
+	bitmap = SDL_CreateRGBSurface(SDL_SWSURFACE, w, h, 1, 0, 0, 0, 0);
+	if ( bitmap == NULL ) {
+		fprintf(stderr, "Couldn't allocate bitmap: %s\n",
+						SDL_GetError());
+		return(NULL);
+	}
+
+	/* Copy the pixels */
+	line = (Uint8 *)bitmap->pixels;
+	w = (w+7)/8;
+	while ( h-- ) {
+		memcpy(line, bits, w);
+		/* X11 Bitmap images have the bits reversed */
+		{ int i, j; Uint8 *buf, byte;
+			for ( buf=line, i=0; i<w; ++i, ++buf ) {
+				byte = *buf;
+				*buf = 0;
+				for ( j=7; j>=0; --j ) {
+					*buf |= (byte&0x01)<<j;
+					byte >>= 1;
+				}
+			}
+		}
+		line += bitmap->pitch;
+		bits += w;
+	}
+	return(bitmap);
+}
+
+int main(int argc, char *argv[])
+{
+	SDL_Surface *screen;
+	SDL_Surface *bitmap;
+	Uint8  video_bpp;
+	Uint32 videoflags;
+	Uint8 *buffer;
+	int i, done;
+	SDL_Event event;
+
+	/* Initialize SDL */
+	if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
+		fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
+		exit(1);
+	}
+	atexit(SDL_Quit);
+
+	video_bpp = 0;
+	videoflags = SDL_SWSURFACE;
+	while ( argc > 1 ) {
+		--argc;
+		if ( strcmp(argv[argc-1], "-bpp") == 0 ) {
+			video_bpp = atoi(argv[argc]);
+			--argc;
+		} else
+		if ( strcmp(argv[argc], "-warp") == 0 ) {
+			videoflags |= SDL_HWPALETTE;
+		} else
+		if ( strcmp(argv[argc], "-hw") == 0 ) {
+			videoflags |= SDL_HWSURFACE;
+		} else
+		if ( strcmp(argv[argc], "-fullscreen") == 0 ) {
+			videoflags |= SDL_FULLSCREEN;
+		} else {
+			fprintf(stderr,
+			"Usage: %s [-bpp N] [-warp] [-hw] [-fullscreen]\n",
+								argv[0]);
+			exit(1);
+		}
+	}
+
+	/* Set 640x480 video mode */
+	if ( (screen=SDL_SetVideoMode(640,480,video_bpp,videoflags)) == NULL ) {
+		fprintf(stderr, "Couldn't set 640x480x%d video mode: %s\n",
+						video_bpp, SDL_GetError());
+		exit(2);
+	}
+
+	/* Set the surface pixels and refresh! */
+	if ( SDL_LockSurface(screen) < 0 ) {
+		fprintf(stderr, "Couldn't lock the display surface: %s\n",
+							SDL_GetError());
+		exit(2);
+	}
+	buffer=(Uint8 *)screen->pixels;
+	for ( i=0; i<screen->h; ++i ) {
+		memset(buffer,(i*255)/screen->h, screen->pitch);
+		buffer += screen->pitch;
+	}
+	SDL_UnlockSurface(screen);
+	SDL_UpdateRect(screen, 0, 0, 0, 0);
+
+	/* Load the bitmap */
+	bitmap = LoadXBM(screen, picture_width, picture_height,
+					(Uint8 *)picture_bits);
+	if ( bitmap == NULL ) {
+		exit(1);
+	}
+
+	/* Wait for a keystroke */
+	done = 0;
+	while ( !done ) {
+		/* Check for events */
+		while ( SDL_PollEvent(&event) ) {
+			switch (event.type) {
+				case SDL_MOUSEBUTTONDOWN: {
+					SDL_Rect dst;
+
+					dst.x = event.button.x - bitmap->w/2;
+					dst.y = event.button.y - bitmap->h/2;
+					dst.w = bitmap->w;
+					dst.h = bitmap->h;
+					SDL_BlitSurface(bitmap, NULL,
+								screen, &dst);
+					SDL_UpdateRects(screen,1,&dst);
+					}
+					break;
+				case SDL_KEYDOWN:
+					/* Any key press quits the app... */
+					done = 1;
+					break;
+				case SDL_QUIT:
+					done = 1;
+					break;
+				default:
+					break;
+			}
+		}
+	}
+	SDL_FreeSurface(bitmap);
+	return(0);
+}