bm_examples.cpp

This containes examples of bmpman usage

/*
 * Copyright (C) Volition, Inc. 1999.  All rights reserved.
 *
 * All source code herein is the property of Volition, Inc. You may not sell
 * or otherwise commercially exploit the source or things you created based on the
 * source.
 *
 */

#include "bmpman/bmpman.h"
#include "graphics/2d.h"

void bm_create_example() {
        static int test_inited = 0;
        static int test_bmp;
        static uint test_bmp_data[128 * 64];

        if (!test_inited) {
                test_inited = 1;
                // Create the new bitmap and fill in its data.
                // When you're done with it completely, call
                // bm_release to free up the bitmap handle
                test_bmp = bm_create(32, 128, 64, test_bmp_data);
                int i, j;
                for (i = 0; i < 64; i++) {
                        for (j = 0; j < 64; j++) {
                                uint r = i * 4;
                                test_bmp_data[j + i * 128] = r;
                        }
                }
        }

        // page out the data, so that the next bm_lock will convert the new data to
        // the correct bpp
        bm_unload(test_bmp);

        // put in new data
        int x, y;
        gr_reset_clip();
        for (y = 0; y < 64; y++) {
                for (x = 0; x < 128; x++) {
                        test_bmp_data[y * 128 + x] = 15;
                }
        }

        // Draw the bitmap, the upper left corner is the origin (0, 0)
        gr_set_bitmap(test_bmp);
        gr_bitmap(0, 0);
}