我想对titltext.cel .CEL 图像格式进行逆向工程并在 SDL2 中呈现它。我碰巧对我正在使用的 CEL 文件有所了解。我知道它应该是字母表和一些符号的精灵表。
.CEL 图像格式是一种非常精简的格式，标题信息非常少。
谷歌搜索 让我找到了一些.CEL 规范.CEL 规范 2 文档，这些文档似乎有这个想法，但我认为缺少加载多个框架的内容。从文档中，我可以知道 CEL 图像中有多少帧以及第一帧从哪里开始。
知道第一帧从哪里开始我以为我可以绕过剥离的图像标题
图片标题：
37 00 00 00 E4 00 00 00 78 03 00 00 D6 05 00 00
18 08 00 00 B2 0A 00 00 02 0D 00 00 F8 0E 00 00
9D 11 00 00 07 14 00 00 4D 15 00 00 CB 16 00 00
04 19 00 00 9E 1A 00 00 1E 1E 00 00 ED 20 00 00
59 24 00 00 4C 26 00 00 78 29 00 00 E7 2B 00 00
1C 2E 00 00 18 30 00 00 AF 32 00 00 EC 34 00 00
BF 38 00 00 88 3B 00 00 8F 3D 00 00 EE 3F 00 00
4B 41 00 00 8E 43 00 00 D6 45 00 00 B4 47 00 00
06 4A 00 00 28 4C 00 00 E9 4D 00 00 4C 50 00 00
67 52 00 00 A9 55 00 00 09 57 00 00 D6 58 00 00
37 5C 00 00 19 5F 00 00 56 60 00 00 F4 61 00 00
A1 63 00 00 5D 64 00 00 93 65 00 00 B6 66 00 00
59 67 00 00 6A 68 00 00 7F 69 00 00 86 6A 00 00
70 6B 00 00 13 6C 00 00 A2 6C 00 00 8A 6E 00 00
45 70 00 00
在图像标题/第一帧开始之后。
D2 D2 D2 D2 D2 D2 D2 D2 D2 F9 03 F5 F4 F4 F3 03 F4 F4 F5
EC FD 07 F5 F5 F5 F5 F5 ED ......
>
根据文档，第一个 DWORD 是 .CEL 中的 FRAMES 数量。这是 0x37，它是十进制的 55，这似乎是准确的。据我了解，其余的只是框架位置。据我所知，每一帧的宽度应该为 45，高度为 46 像素。由于图像是 8 位颜色，这意味着每种颜色将是 1 个字节。
另外，我听说这些旧的图像类型被称为调色板或有助于改变颜色的东西。
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include <SDL2/SDL_mixer.h>
#include <stdbool.h>
#include <stdio.h>
#include <errno.h>
SDL_Window *window; // SDL MAIN WINDOW
SDL_Renderer *renderer;
SDL_Texture *texture;
int SCREEN_WIDTH = 1920;
int SCREEN_HEIGHT = 1080;
SDL_Event e;
bool quit = false;
/** 32-bit in-memory backbuffer surface */
SDL_Surface *surface;
/** 8-bit surface wrapper around #gpBuffer */
SDL_Surface *pal_surface;
/** Currently active palette */
SDL_Palette *palette;
SDL_Texture* texture;
FILE* CELFILE;
unsigned char CELBuffer [3000];
// The CEL dementions I am trying to open are
// W 46 Height 45 Width 55 FRAMES
void LoadCEL (char * Path){
CELFILE = fopen(Path, "rb");
int CELHEADERSIZE = 228;
int CELFRAMESIZE = 2070;
//The Header Appears to be 228 bytes in size. I want to put a frame into CELBuffer
//
// I am assuming to get the size of the first framee I need a size of 2017 (45 * 55) ;
unsigned char c;
for (int i = 0; i < (CELFRAMESIZE+CELHEADERSIZE) ; i++){
if(i > CELHEADERSIZE ){
c = fgetc(CELFILE);
CELBuffer[i] = c;
printf("CELFILE HEADR %02x \n" ,CELBuffer[i] & 0xff);
}
}
void * pCELBuffer = CELBuffer;
surface = SDL_CreateRGBSurfaceFrom( pCELBuffer , 45, 55, 8,1 ,0, 0, 0, 0xff);
texture = SDL_CreateTextureFromSurface(renderer, surface);
}
void Create_SDL_Window()
{
SDL_Init(SDL_INIT_EVERYTHING);
IMG_Init(IMG_INIT_PNG);
window = SDL_CreateWindow("Test Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
renderer = SDL_CreateRenderer(window, -1, 0);
printf("Window And Renderer Created!\n");
}
int main(){
LoadCEL("/home/james/Desktop/titltext.cel");
Create_SDL_Window();
printf("THIS WORKD\n");
while (!quit){
SDL_RenderPresent(renderer);
while (SDL_PollEvent(&e)){
//If user closes the window
if (e.type == SDL_QUIT){
quit = true;
}
//If user presses any key
if (e.type == SDL_KEYDOWN){
// quit = true;
}
//If user clicks the mouse
if (e.type == SDL_MOUSEBUTTONDOWN){
/// quit = true;
}
}
SDL_RenderClear(renderer);
//renderTexture(image, renderer, x, y);
SDL_RenderPresent(renderer);
}
}
任何帮助深表感谢。