本文共 4984 字，大约阅读时间需要 16 分钟。

自定义的 Shader 程序结构体：

struct ShaderProgram{    struct Path    {        char *vertex_shader_path;        char *fragment_shader_path;    } path;    struct FragmentShaderUniformLocation    {        char *channel_0;        char *channel_1;        char *global_time;        char *resolution;    } fsul;};

入口函数：

int main(){#ifdef TOFILE	createObjects();#else    parseFile("result.txt");#endif    return 0;}

创建 (Shader Program) JSON 对象并保存为 txt 的函数：

void createObjects(){#if MUL	ShaderProgram sp[2] =	{		{			{ "../Shader/vs_0.glsl", "../Shader/fs_0.glsl" },			{ "iChannel0", "iChannel1", "iGlobalTime", "iResolution" }		},	// sp[0]		{			{ "../Shader/vs_1.glsl", "../Shader/fs_1.glsl" },			{ "iChannel0", "iChannel1", "iGlobalTime", "iResolution" }		}	// sp[1]	};#else	ShaderProgram sp =	{		{ "../Shader/vs_0.glsl", "../Shader/fs_0.glsl" },		{ "iChannel0", "iChannel1", "iGlobalTime", "iResolution" }	};#endif	cJSON *root = cJSON_CreateArray();	cJSON *fld = NULL, *fldd_0 = NULL, *fldd_1;#if MUL	for (int i = 0; i < 2; i++)	{		cJSON_AddItemToArray(root, fld = cJSON_CreateArray());		cJSON_AddItemToArray(fld, fldd_0 = cJSON_CreateObject());		cJSON_AddStringToObject(fldd_0, "Vertex Shader Path", sp[i].path.vertex_shader_path);		cJSON_AddStringToObject(fldd_0, "Fragment Shader Path", sp[i].path.fragment_shader_path);		cJSON_AddItemToArray(fld, fldd_1 = cJSON_CreateObject());		cJSON_AddStringToObject(fldd_1, "Channel 0", sp[i].fsul.channel_0);		cJSON_AddStringToObject(fldd_1, "Channel 1", sp[i].fsul.channel_1);		cJSON_AddStringToObject(fldd_1, "Global Time", sp[i].fsul.global_time);		cJSON_AddStringToObject(fldd_1, "Resolution", sp[i].fsul.resolution);	}#else	cJSON_AddItemToArray(root, fld = cJSON_CreateArray());	cJSON_AddItemToArray(fld, fldd_0 = cJSON_CreateObject());	cJSON_AddStringToObject(fldd_0, "Vertex Shader Path", sp.path.vertex_shader_path);	cJSON_AddStringToObject(fldd_0, "Fragment Shader Path", sp.path.fragment_shader_path);	cJSON_AddItemToArray(fld, fldd_1 = cJSON_CreateObject());	cJSON_AddStringToObject(fldd_1, "Channel 0", sp.fsul.channel_0);	cJSON_AddStringToObject(fldd_1, "Channel 1", sp.fsul.channel_1);	cJSON_AddStringToObject(fldd_1, "Global Time", sp.fsul.global_time);	cJSON_AddStringToObject(fldd_1, "Resolution", sp.fsul.resolution);#endif	char *out = cJSON_Print(root);	// 保存信息到文件	writeToFile("result.txt", out);	printf("Debug Info: %s", out);	free(out);	cJSON_Delete(root);}

解析本地 txt 的函数：

void parseFile(char *filename){    FILE *f;    long len;    char *data;    f = fopen(filename, "rb");    fseek(f, 0, SEEK_END);    len = ftell(f);    fseek(f, 0, SEEK_SET);    data = (char *)malloc(len + 1);    fread(data, 1, len, f);    fclose(f);    //easyParse(data);    itemParse(data);    free(data);}

void itemParse(char *text){    cJSON *json;    json = cJSON_Parse(text);    if (!json)    {        printf("Error before: [%s]\n", cJSON_GetErrorPtr());    }    else    {        int size_0 = cJSON_GetArraySize(json);        printf("Shader Program Nums = %d\n", size_0);        for (int i = 0; i < size_0; i++)        {            cJSON *pItem = cJSON_GetArrayItem(json, i);            if (NULL == pItem)            {                continue;            }            int size_1 = cJSON_GetArraySize(pItem);            //printf("Shader Program Item Nums = %d\n", size_1);            printf("===========================\n");            for (int j = 0; j < size_1; j++)            {                cJSON *ppItem = cJSON_GetArrayItem(pItem, j);                //printJSON(ppItem);                int size_2 = cJSON_GetArraySize(ppItem);                printf("Shader Program Item Size  = %d\n", size_2);                //printf("---------------------------\n");                for (int k = 0; k < size_2; k++)                {                    cJSON *pppItem = cJSON_GetArrayItem(ppItem, k);                    printJSON(pppItem);                }                printf("===========================\n");            }        }    }    cJSON_Delete(json);}

生成的 txt 内容为：

开启 MUL 宏的情况

[    [        {            "Vertex Shader Path": "../Shader/vs_0.glsl",             "Fragment Shader Path": "../Shader/fs_0.glsl"        },         {            "Channel 0": "iChannel0",             "Channel 1": "iChannel1",             "Global Time": "iGlobalTime",             "Resolution": "iResolution"        }    ],     [        {            "Vertex Shader Path": "../Shader/vs_1.glsl",             "Fragment Shader Path": "../Shader/fs_1.glsl"        },         {            "Channel 0": "iChannel0",             "Channel 1": "iChannel1",             "Global Time": "iGlobalTime",             "Resolution": "iResolution"        }    ]]

或未开启 MUL 的情况

[    [        {            "Vertex Shader Path": "../Shader/vs_0.glsl",             "Fragment Shader Path": "../Shader/fs_0.glsl"        },         {            "Channel 0": "iChannel0",             "Channel 1": "iChannel1",             "Global Time": "iGlobalTime",             "Resolution": "iResolution"        }    ]]

相关阅读

转载地址：https://panda1234lee.blog.csdn.net/article/details/53312328 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！