diff options
Diffstat (limited to 'nGenEx/Bmp.cpp')
| -rw-r--r-- | nGenEx/Bmp.cpp | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/nGenEx/Bmp.cpp b/nGenEx/Bmp.cpp new file mode 100644 index 0000000..18c5870 --- /dev/null +++ b/nGenEx/Bmp.cpp @@ -0,0 +1,251 @@ +/* Project nGenEx
+ Destroyer Studios LLC
+ Copyright © 1997-2004. All Rights Reserved.
+
+ SUBSYSTEM: nGenEx.lib
+ FILE: Bmp.cpp
+ AUTHOR: John DiCamillo
+
+
+ OVERVIEW
+ ========
+ BMP image file loader
+*/
+
+
+#include "MemDebug.h"
+#include "BMP.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// +--------------------------------------------------------------------+
+
+BmpImage::BmpImage()
+ : width(0), height(0), image(0)
+{ }
+
+BmpImage::BmpImage(short w, short h, unsigned long* hibits)
+{
+ ZeroMemory(this, sizeof(BmpImage));
+
+ width = w;
+ height = h;
+
+ file_hdr.type = 19778; // 'BM'
+ file_hdr.size = sizeof(BmpFileHeader) +
+ sizeof(BmpInfoHeader) +
+ w * h * 3;
+
+ file_hdr.offset = sizeof(BmpFileHeader) +
+ sizeof(BmpInfoHeader);
+
+ info_hdr.hdr_size = sizeof(BmpInfoHeader);
+ info_hdr.width = width;
+ info_hdr.height = height;
+ info_hdr.planes = 1;
+ info_hdr.bit_count = 24;
+
+ int pixels = width * height;
+
+ image = new(__FILE__,__LINE__) DWORD [pixels];
+
+ if (image && pixels) {
+ for (int i = 0; i < pixels; i++)
+ image[i] = hibits[i];
+ }
+}
+
+BmpImage::~BmpImage()
+{
+ delete [] image;
+}
+
+// +--------------------------------------------------------------------+
+
+int BmpImage::Load(char *filename)
+{
+ int status = BMP_INVALID;
+ FILE* f;
+
+ f = fopen(filename,"rb");
+ if (f == NULL)
+ return BMP_NOFILE;
+
+ fread(&file_hdr.type, sizeof(WORD), 1, f);
+ fread(&file_hdr.size, sizeof(DWORD), 1, f);
+ fread(&file_hdr.rsvd1, sizeof(WORD), 1, f);
+ fread(&file_hdr.rsvd2, sizeof(WORD), 1, f);
+ fread(&file_hdr.offset, sizeof(DWORD), 1, f);
+ fread(&info_hdr, BMP_INFO_HDR_SIZE, 1, f);
+
+ if (info_hdr.width > 32768 || info_hdr.height > 32768 ||
+ (info_hdr.width&3) || (info_hdr.height&3) ||
+ info_hdr.compression != 0) {
+ fclose(f);
+ return BMP_INVALID;
+ }
+
+ width = (WORD) info_hdr.width;
+ height = (WORD) info_hdr.height;
+
+ // read 256 color BMP file
+ if (info_hdr.bit_count == 8) {
+ fread(palette, sizeof(palette), 1, f);
+
+ int pixels = width*height;
+
+ delete [] image;
+ image = new(__FILE__,__LINE__) DWORD[pixels];
+ if (image == NULL)
+ return BMP_NOMEM;
+
+ for (int row = height-1; row >= 0; row--) {
+ for (int col = 0; col < width; col++) {
+ BYTE index = fgetc(f);
+ image[row*width+col] = palette[index];
+ }
+ }
+
+ status = BMP_OK;
+ }
+
+ // read 24-bit (true COLOR) BMP file
+ else if (info_hdr.bit_count == 24) {
+ int pixels = width*height;
+
+ delete [] image;
+ image = new(__FILE__,__LINE__) DWORD[pixels];
+ if (image == NULL)
+ return BMP_NOMEM;
+
+ for (int row = height-1; row >= 0; row--) {
+ for (int col = 0; col < width; col++) {
+ DWORD blue = fgetc(f);
+ DWORD green = fgetc(f);
+ DWORD red = fgetc(f);
+
+ image[row*width+col] = 0xff000000 | (red << 16) | (green << 8) | blue;
+ }
+ }
+
+ status = BMP_OK;
+ }
+
+ fclose(f);
+ return status;
+}
+
+// +--------------------------------------------------------------------+
+
+int BmpImage::LoadBuffer(unsigned char* buf, int len)
+{
+ int status = BMP_INVALID;
+ BYTE* fp;
+
+ if (buf == NULL)
+ return BMP_NOFILE;
+
+ fp = buf;
+ memcpy(&info_hdr, buf + BMP_FILE_HDR_SIZE, BMP_INFO_HDR_SIZE);
+ fp += BMP_FILE_HDR_SIZE + BMP_INFO_HDR_SIZE;
+
+ if (info_hdr.width > 32768 || info_hdr.height > 32768 ||
+ (info_hdr.width&3) || (info_hdr.height&3) ||
+ info_hdr.compression != 0) {
+ return BMP_INVALID;
+ }
+
+ width = (WORD) info_hdr.width;
+ height = (WORD) info_hdr.height;
+
+ // read 256 color BMP file
+ if (info_hdr.bit_count == 8) {
+ memcpy(palette, fp, sizeof(palette));
+ fp += sizeof(palette);
+
+ int pixels = width*height;
+
+ delete [] image;
+ image = new(__FILE__,__LINE__) DWORD[pixels];
+ if (image == NULL)
+ return BMP_NOMEM;
+
+ for (int row = height-1; row >= 0; row--) {
+ for (int col = 0; col < width; col++) {
+ BYTE index = *fp++;
+ image[row*width+col] = palette[index];
+ }
+ }
+
+ status = BMP_OK;
+ }
+
+ // read 24-bit (true COLOR) BMP file
+ else if (info_hdr.bit_count == 24) {
+ int pixels = width*height;
+
+ delete [] image;
+ image = new(__FILE__,__LINE__) DWORD[pixels];
+ if (image == NULL)
+ return BMP_NOMEM;
+
+ for (int row = height-1; row >= 0; row--) {
+ for (int col = 0; col < width; col++) {
+ DWORD blue = *fp++;
+ DWORD green = *fp++;
+ DWORD red = *fp++;
+
+ image[row*width+col] = 0xff000000 | (red << 16) | (green << 8) | blue;
+ }
+ }
+
+ status = BMP_OK;
+ }
+
+ return status;
+}
+
+// +--------------------------------------------------------------------+
+
+int BmpImage::Save(char *filename)
+{
+ int status = BMP_INVALID;
+ FILE* f;
+
+ f = fopen(filename,"wb");
+ if (f == NULL)
+ return BMP_NOFILE;
+
+ info_hdr.bit_count = 24;
+ info_hdr.compression = 0;
+
+ fwrite(&file_hdr.type, sizeof(WORD), 1, f);
+ fwrite(&file_hdr.size, sizeof(DWORD), 1, f);
+ fwrite(&file_hdr.rsvd1, sizeof(WORD), 1, f);
+ fwrite(&file_hdr.rsvd2, sizeof(WORD), 1, f);
+ fwrite(&file_hdr.offset, sizeof(DWORD), 1, f);
+ fwrite(&info_hdr, BMP_INFO_HDR_SIZE, 1, f);
+
+ // write 24-bit (TRUE COLOR) BMP file
+ for (int row = height-1; row >= 0; row--) {
+ for (int col = 0; col < width; col++) {
+ DWORD pixel = image[row*width+col];
+
+ BYTE blue = (BYTE) ((pixel & 0x000000ff) >> 0);
+ BYTE green = (BYTE) ((pixel & 0x0000ff00) >> 8);
+ BYTE red = (BYTE) ((pixel & 0x00ff0000) >> 16);
+
+ fwrite(&blue, 1, 1, f);
+ fwrite(&green, 1, 1, f);
+ fwrite(&red, 1, 1, f);
+ }
+ }
+
+ status = BMP_OK;
+
+ fclose(f);
+ return status;
+}
+
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