184 lines
5.3 KiB
C
184 lines
5.3 KiB
C
#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <math.h>
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#include <stdlib.h>
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#include "gd.h"
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#include "gdfontt.h"
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#include "gdfonts.h"
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#include "gdfontmb.h"
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#include "gdfontl.h"
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#include "gdfontg.h"
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int
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main (void)
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{
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/* Input and output files */
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FILE *in;
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FILE *out;
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/* Input and output images */
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gdImagePtr im_in = 0, im_out = 0;
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/* Brush image */
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gdImagePtr brush;
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/* Color indexes */
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int white;
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int blue;
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int red;
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int green;
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/* Points for polygon */
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gdPoint points[3];
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int i;
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/* gd fonts for font test */
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gdFontPtr fonts[5];
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int y;
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/* Create output image, in true color. */
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im_out = gdImageCreateTrueColor (256 + 384, 384);
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/* 2.0.2: first color allocated would automatically be background in a
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palette based image. Since this is a truecolor image, with an
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automatic background of black, we must fill it explicitly. */
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white = gdImageColorAllocate (im_out, 255, 255, 255);
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gdImageFilledRectangle (im_out, 0, 0, gdImageSX (im_out),
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gdImageSY (im_out), white);
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/* Set transparent color. */
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gdImageColorTransparent (im_out, white);
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/* Try to load demoin.png and paste part of it into the
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output image. */
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in = fopen ("demoin.png", "rb");
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if (!in) {
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fprintf(stderr, "Can't load source image; this demo\n");
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fprintf(stderr, "is much more impressive if demoin.png\n");
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fprintf(stderr, "is available.\n");
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im_in = 0;
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} else {
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int a;
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im_in = gdImageCreateFromPng (in);
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fclose (in);
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/* Now copy, and magnify as we do so */
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gdImageCopyResampled (im_out, im_in, 32, 32, 0, 0, 192, 192, 255, 255);
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/* Now display variously rotated space shuttles in a circle of our own */
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for (a = 0; (a < 360); a += 45) {
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int cx = cos (a * .0174532925) * 128;
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int cy = -sin (a * .0174532925) * 128;
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gdImageCopyRotated (im_out, im_in,
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256 + 192 + cx, 192 + cy,
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0, 0, gdImageSX (im_in), gdImageSY (im_in), a);
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}
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}
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red = gdImageColorAllocate (im_out, 255, 0, 0);
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green = gdImageColorAllocate (im_out, 0, 255, 0);
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blue = gdImageColorAllocate (im_out, 0, 0, 255);
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/* Fat Rectangle */
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gdImageSetThickness (im_out, 4);
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gdImageLine (im_out, 16, 16, 240, 16, green);
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gdImageLine (im_out, 240, 16, 240, 240, green);
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gdImageLine (im_out, 240, 240, 16, 240, green);
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gdImageLine (im_out, 16, 240, 16, 16, green);
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gdImageSetThickness (im_out, 1);
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/* Circle */
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gdImageArc (im_out, 128, 128, 60, 20, 0, 720, blue);
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/* Arc */
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gdImageArc (im_out, 128, 128, 40, 40, 90, 270, blue);
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/* Flood fill: doesn't do much on a continuously
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variable tone jpeg original. */
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gdImageFill (im_out, 8, 8, blue);
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/* Polygon */
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points[0].x = 64;
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points[0].y = 0;
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points[1].x = 0;
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points[1].y = 128;
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points[2].x = 128;
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points[2].y = 128;
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gdImageFilledPolygon (im_out, points, 3, green);
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/* 2.0.12: Antialiased Polygon */
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gdImageSetAntiAliased (im_out, green);
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for (i = 0; (i < 3); i++) {
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points[i].x += 128;
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}
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gdImageFilledPolygon (im_out, points, 3, gdAntiAliased);
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/* Brush. A fairly wild example also involving a line style! */
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if (im_in) {
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int style[8];
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brush = gdImageCreateTrueColor (16, 16);
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gdImageCopyResized (brush, im_in,
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0, 0, 0, 0,
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gdImageSX (brush), gdImageSY (brush),
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gdImageSX (im_in), gdImageSY (im_in));
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gdImageSetBrush (im_out, brush);
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/* With a style, so they won't overprint each other.
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Normally, they would, yielding a fat-brush effect. */
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style[0] = 0;
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style[1] = 0;
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style[2] = 0;
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style[3] = 0;
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style[4] = 0;
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style[5] = 0;
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style[6] = 0;
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style[7] = 1;
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gdImageSetStyle (im_out, style, 8);
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/* Draw the styled, brushed line */
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gdImageLine (im_out, 0, 255, 255, 0, gdStyledBrushed);
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}
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/* Text (non-truetype; see gdtestft for a freetype demo) */
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fonts[0] = gdFontGetTiny ();
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fonts[1] = gdFontGetSmall ();
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fonts[2] = gdFontGetMediumBold ();
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fonts[3] = gdFontGetLarge ();
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fonts[4] = gdFontGetGiant ();
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y = 0;
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for (i = 0; (i <= 4); i++) {
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gdImageString (im_out, fonts[i], 32, 32 + y, (unsigned char *) "hi",
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red);
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y += fonts[i]->h;
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}
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y = 0;
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for (i = 0; (i <= 4); i++) {
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gdImageStringUp (im_out, fonts[i], 64 + y, 64,
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(unsigned char *) "hi", red);
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y += fonts[i]->h;
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}
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/* Random antialiased lines; coordinates all over the image,
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but the output will respect a small clipping rectangle */
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gdImageSetClip (im_out, 0, gdImageSY (im_out) - 100,
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100, gdImageSY (im_out));
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/* Fixed seed for reproducibility of results */
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srand (100);
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for (i = 0; (i < 100); i++) {
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int x1 = rand () % gdImageSX (im_out);
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int y1 = rand () % gdImageSY (im_out);
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int x2 = rand () % gdImageSX (im_out);
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int y2 = rand () % gdImageSY (im_out);
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gdImageSetAntiAliased (im_out, white);
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gdImageLine (im_out, x1, y1, x2, y2, gdAntiAliased);
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}
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/* Make output image interlaced (progressive, in the case of JPEG) */
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gdImageInterlace (im_out, 1);
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out = fopen ("demoout.png", "wb");
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/* Write PNG */
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gdImagePng (im_out, out);
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fclose (out);
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out = fopen ("demoout.gif", "wb");
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/* Write GIF (2.0.28) */
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gdImageGif (im_out, out);
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fclose (out);
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/* 2.0.12: also write a paletteized png comparable to the gif */
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out = fopen ("demooutp.png", "wb");
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gdImageTrueColorToPalette (im_out, 0, 256);
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gdImagePng (im_out, out);
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fclose (out);
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gdImageDestroy (im_out);
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if (im_in) {
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gdImageDestroy (im_in);
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}
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return 0;
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}
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