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"
}
]
]
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