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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | daniel-mar | 1 | /** |
| 2 | * Bitmap Import for Imagination Pilots Entertainment 16-bit games (IPE16) |
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| 3 | * - Blown Away - The Interactive Game by Imagination Pilots (BA) |
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| 4 | * - Panic in the Park - The Interactive Game by Imagination Pilots (PiP) |
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| 5 | * - Where's Waldo? At the Circus (Waldo1) |
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| 6 | * ART file packer and unpacker by Daniel Marschall, ViaThinkSoft (C) 2014-2018 |
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| 7 | * Revision: 2018-02-15 |
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| 8 | **/ |
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| 9 | |||
| 10 | #include <stdio.h> |
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| 11 | #include <stdint.h> |
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| 12 | #include <stdbool.h> |
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| 13 | #include <stdlib.h> |
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| 14 | #include <string.h> |
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| 15 | #include <assert.h> |
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| 16 | |||
| 17 | #include "bitmap.h" |
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| 18 | #include "ipe16_bmpimport.h" |
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| 19 | |||
| 20 | Ipe16ColorTableEntry rgbquad_to_ipe16_rgb(RGBQUAD rq) { |
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| 21 | Ipe16ColorTableEntry cte; |
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| 22 | cte.r = rq.rgbRed; |
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| 23 | cte.g = rq.rgbGreen; |
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| 24 | cte.b = rq.rgbBlue; |
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| 25 | return cte; |
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| 26 | } |
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| 27 | |||
| 28 | bool ipe16_bmp_import(FILE* fibBitmap, Ipe16BmpImportData* result) { |
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| 29 | BITMAPFILEHEADER bitmapFileHeader; |
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| 30 | BITMAPINFOHEADER bitmapInfoHeader; |
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| 31 | |||
| 32 | #define EXIT_ERROR(msg) { sprintf(result->error, msg); return false; } |
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| 33 | |||
| 34 | fseek(fibBitmap, 0, SEEK_SET); |
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| 35 | |||
| 36 | if (!fread(&bitmapFileHeader, sizeof(BITMAPFILEHEADER), 1, fibBitmap) || |
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| 37 | (bitmapFileHeader.bfType != BI_SIGNATURE) || |
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| 38 | !fread(&bitmapInfoHeader, sizeof(BITMAPINFOHEADER), 1, fibBitmap)) { |
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| 39 | EXIT_ERROR("Not a bitmap file"); |
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| 40 | } |
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| 41 | |||
| 42 | if (bitmapInfoHeader.biCompression != BI_RGB) { |
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| 43 | EXIT_ERROR("At the moment, only uncompressed files can be read."); |
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| 44 | } |
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| 45 | |||
| 46 | if (bitmapInfoHeader.biBitCount != 8) { |
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| 47 | EXIT_ERROR("The color depth has to be 8 bpp."); |
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| 48 | } |
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| 49 | |||
| 50 | Ipe16ColorTable* ct = malloc(sizeof(Ipe16ColorTable)); |
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| 51 | #define NUM_COLORS 256 |
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| 52 | RGBQUAD rgba_colortable[NUM_COLORS]; |
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| 53 | if (!fread(&rgba_colortable, sizeof(rgba_colortable), 1, fibBitmap)) { |
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| 54 | EXIT_ERROR("Error reading color table."); |
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| 55 | } |
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| 56 | int i; |
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| 57 | for (i=0; i<NUM_COLORS; ++i) { |
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| 58 | Ipe16ColorTableEntry x; |
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| 59 | x = rgbquad_to_ipe16_rgb(rgba_colortable[i]); |
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| 60 | ct->colors[i] = x; |
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| 61 | } |
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| 62 | |||
| 63 | fseek(fibBitmap, bitmapFileHeader.bfOffBits, SEEK_SET); |
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| 64 | |||
| 65 | const uint32_t realwidth = bitmapInfoHeader.biWidth; |
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| 66 | const uint32_t realheight = abs(bitmapInfoHeader.biHeight); |
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| 67 | const size_t bmpDataSize = realwidth*realheight; |
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| 68 | unsigned char* bmpData = (unsigned char*)malloc(bmpDataSize); |
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| 69 | assert(bmpData != NULL); |
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| 70 | const int padded_width = (bitmapInfoHeader.biWidth + 3) & ~0x03; // http://stackoverflow.com/a/2022194/3544341 |
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| 71 | unsigned char* bmpLine = (unsigned char*)malloc(padded_width); |
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| 72 | assert(bmpLine != NULL); |
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| 73 | int h; |
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| 74 | for (h=0; h<realheight; ++h) { |
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| 75 | if (fread(bmpLine, padded_width, 1, fibBitmap) != 1) { |
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| 76 | free(bmpLine); |
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| 77 | free(bmpData); |
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| 78 | free(ct); |
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| 79 | EXIT_ERROR("Error while reading pixel data."); |
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| 80 | } |
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| 81 | int idx; |
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| 82 | if (bitmapInfoHeader.biHeight > 0) { |
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| 83 | // "bottom-up" (most usual) |
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| 84 | // Convert to "top-down": |
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| 85 | idx = (realheight-1)-h; |
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| 86 | } else { |
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| 87 | // "top-down" |
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| 88 | idx = h; |
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| 89 | } |
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| 90 | assert(idx*realwidth >= 0); |
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| 91 | memcpy(bmpData+idx*realwidth, bmpLine, realwidth); |
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| 92 | } |
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| 93 | free(bmpLine); |
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| 94 | |||
| 95 | result->colorTable = ct; |
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| 96 | result->bmpData = bmpData; |
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| 97 | result->bmpDataSize = bmpDataSize; |
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| 98 | result->width = realwidth; |
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| 99 | result->height = realheight; |
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| 100 | result->error[0] = 0; |
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| 101 | return true; |
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| 102 | } |
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| 103 | |||
| 104 | void ipe16_free_bmpimport_result(Ipe16BmpImportData *res) { |
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| 105 | if (res->colorTable) free(res->colorTable); |
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| 106 | if (res->bmpData) free(res->bmpData); |
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| 107 | } |
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| 108 |