rRES raylib resources custom file format support

First version of custom raylib resources file format -IN DEVELOPMENT-

2 files changed, 464 insertions, 0 deletions

diff --git a/src/raylib.h b/src/raylib.h
index 6fd960dc..e2e4ee13 100644
--- a/src/raylib.h
+++ b/src/raylib.h
@@ -602,6 +602,26 @@ typedef enum {
     HMD_FOVE_VR,
 } VrDevice;
 
+// rRES data returned when reading a resource, it contains all required data for user (24 byte)
+typedef struct {
+    unsigned int type;          // Resource type (4 byte)
+    
+    unsigned int param1;        // Resouce parameter 1 (4 byte)
+    unsigned int param2;        // Resouce parameter 2 (4 byte)
+    unsigned int param3;        // Resouce parameter 3 (4 byte)
+    unsigned int param4;        // Resouce parameter 4 (4 byte)
+    
+    void *data;                 // Resource data pointer (4 byte)
+} RRESData;
+
+typedef enum { 
+    RRES_RAW = 0, 
+    RRES_IMAGE, 
+    RRES_WAVE, 
+    RRES_VERTEX, 
+    RRES_TEXT 
+} RRESDataType;
+
 #ifdef __cplusplus
 extern "C" {            // Prevents name mangling of functions
 #endif
diff --git a/src/rres.h b/src/rres.h
new file mode 100644
index 00000000..dcf7be3f
--- /dev/null
+++ b/src/rres.h
@@ -0,0 +1,444 @@
+/**********************************************************************************************
+*
+*   rres - raylib Resource custom format management functions
+*
+*   Basic functions to load/save rRES resource files
+*
+*   External libs:
+*       tinfl   -  DEFLATE decompression functions
+*
+*   Module Configuration Flags:
+*
+*       #define RREM_IMPLEMENTATION
+*           Generates the implementation of the library into the included file.
+*
+*
+*   Copyright (c) 2016-2017 Ramon Santamaria (@raysan5)
+*
+*   This software is provided "as-is", without any express or implied warranty. In no event
+*   will the authors be held liable for any damages arising from the use of this software.
+*
+*   Permission is granted to anyone to use this software for any purpose, including commercial
+*   applications, and to alter it and redistribute it freely, subject to the following restrictions:
+*
+*     1. The origin of this software must not be misrepresented; you must not claim that you
+*     wrote the original software. If you use this software in a product, an acknowledgment
+*     in the product documentation would be appreciated but is not required.
+*
+*     2. Altered source versions must be plainly marked as such, and must not be misrepresented
+*     as being the original software.
+*
+*     3. This notice may not be removed or altered from any source distribution.
+*
+**********************************************************************************************/
+
+#ifndef RRES_H
+#define RRES_H
+
+#if !defined(RRES_STANDALONE)
+    #include "raylib.h"
+#endif
+
+//#define RRES_STATIC
+#ifdef RRES_STATIC
+    #define RRESDEF static              // Functions just visible to module including this file
+#else
+    #ifdef __cplusplus
+        #define RRESDEF extern "C"      // Functions visible from other files (no name mangling of functions in C++)
+    #else
+        #define RRESDEF extern          // Functions visible from other files
+    #endif
+#endif
+
+//----------------------------------------------------------------------------------
+// Defines and Macros
+//----------------------------------------------------------------------------------
+#define MAX_RESOURCES_SUPPORTED   256
+
+//----------------------------------------------------------------------------------
+// Types and Structures Definition
+// NOTE: Some types are required for RAYGUI_STANDALONE usage
+//----------------------------------------------------------------------------------
+#if defined(RRES_STANDALONE)
+    // rRES data returned when reading a resource, it contains all required data for user (24 byte)
+    typedef struct {
+        unsigned int type;          // Resource type (4 byte)
+        
+        unsigned int param1;        // Resouce parameter 1 (4 byte)
+        unsigned int param2;        // Resouce parameter 2 (4 byte)
+        unsigned int param3;        // Resouce parameter 3 (4 byte)
+        unsigned int param4;        // Resouce parameter 4 (4 byte)
+        
+        void *data;                 // Resource data pointer (4 byte)
+    } RRESData;
+    
+    typedef enum { 
+        RRES_RAW = 0, 
+        RRES_IMAGE, 
+        RRES_WAVE, 
+        RRES_VERTEX, 
+        RRES_TEXT 
+    } RRESDataType;
+#endif
+
+//----------------------------------------------------------------------------------
+// Global variables
+//----------------------------------------------------------------------------------
+//...
+
+//----------------------------------------------------------------------------------
+// Module Functions Declaration
+//----------------------------------------------------------------------------------
+RRESDEF RRESData LoadResource(const char *rresFileName);
+RRESDEF RRESData LoadResourceById(const char *rresFileName, int rresId);
+RRESDEF void UnloadResource(RRESData rres);
+
+#endif // RRES_H
+
+
+/***********************************************************************************
+*
+*   RRES IMPLEMENTATION
+*
+************************************************************************************/
+
+#if defined(RRES_IMPLEMENTATION)
+
+#include <stdio.h>          // Required for: FILE, fopen(), fclose()
+
+// Check if custom malloc/free functions defined, if not, using standard ones
+#if !defined(RRES_MALLOC)
+    #include <stdlib.h>     // Required for: malloc(), free()
+
+    #define RRES_MALLOC(size)  malloc(size)
+    #define RRES_FREE(ptr)     free(ptr)
+#endif
+
+#include "external/tinfl.c" // Required for: tinfl_decompress_mem_to_mem()
+                            // NOTE: DEFLATE algorythm data decompression
+
+//----------------------------------------------------------------------------------
+// Defines and Macros
+//----------------------------------------------------------------------------------
+//...
+
+//----------------------------------------------------------------------------------
+// Types and Structures Definition
+//----------------------------------------------------------------------------------
+
+// rRES file header (8 byte)
+typedef struct {
+    char id[4];                 // File identifier: rRES (4 byte)
+    unsigned short version;     // File version and subversion (2 byte)
+    unsigned short count;       // Number of resources in this file (2 byte)
+} RRESFileHeader;
+
+// rRES info header, every resource includes this header (12 byte + 16 byte)
+typedef struct {
+    unsigned short id;          // Resource unique identifier (2 byte)
+    unsigned char dataType;     // Resource data type (1 byte)
+    unsigned char compType;     // Resource data compression type (1 byte)
+    unsigned int dataSize;      // Resource data size (compressed or not, only DATA) (4 byte)
+    unsigned int uncompSize;    // Resource data size (uncompressed, only DATA) (4 byte)
+
+    unsigned int param1;        // Resouce parameter 1 (4 byte)
+    unsigned int param2;        // Resouce parameter 2 (4 byte)
+    unsigned int param3;        // Resouce parameter 3 (4 byte)
+    unsigned int param4;        // Resouce parameter 4 (4 byte)
+} RRESInfoHeader;
+
+// Compression types
+typedef enum { 
+    RRES_COMP_NONE = 0,         // No data compression
+    RRES_COMP_DEFLATE,          // DEFLATE compression
+    RRES_COMP_LZ4,              // LZ4 compression
+    RRES_COMP_LZMA,             // LZMA compression
+    // brotli, zopfli, gzip     // Other compression algorythms...
+} RRESCompressionType;
+
+#if defined(RRES_STANDALONE)
+typedef enum { INFO = 0, ERROR, WARNING, DEBUG, OTHER } TraceLogType;
+#endif
+
+//----------------------------------------------------------------------------------
+// Global Variables Definition
+//----------------------------------------------------------------------------------
+//...
+
+//----------------------------------------------------------------------------------
+// Module specific Functions Declaration
+//----------------------------------------------------------------------------------
+static void *DecompressData(const unsigned char *data, unsigned long compSize, int uncompSize);
+
+//----------------------------------------------------------------------------------
+// Module Functions Definition
+//----------------------------------------------------------------------------------
+
+// Load resource from file (only one)
+// NOTE: Returns uncompressed data with parameters, only first resource found
+RRESDEF RRESData LoadResource(const char *fileName)
+{
+    RRESData rres = { 0 };
+    
+    RRESFileHeader fileHeader;
+    RRESInfoHeader infoHeader;
+    
+    FILE *rresFile = fopen(fileName, "rb");
+
+    if (rresFile == NULL) TraceLog(WARNING, "[%s] rRES raylib resource file could not be opened", fileName);
+    else
+    {
+        // Read rres file info header
+        fread(&fileHeader.id[0], sizeof(char), 1, rresFile);
+        fread(&fileHeader.id[1], sizeof(char), 1, rresFile);
+        fread(&fileHeader.id[2], sizeof(char), 1, rresFile);
+        fread(&fileHeader.id[3], sizeof(char), 1, rresFile);
+        fread(&fileHeader.version, sizeof(short), 1, rresFile);
+        fread(&fileHeader.count, sizeof(short), 1, rresFile);
+
+        // Verify "rRES" identifier
+        if ((fileHeader.id[0] != 'r') && (fileHeader.id[1] != 'R') && (fileHeader.id[2] != 'E') && (fileHeader.id[3] != 'S'))
+        {
+            TraceLog(WARNING, "[%s] This is not a valid raylib resource file", fileName);
+        }
+        else
+        {
+            // Read first resource info and parameters
+            fread(&infoHeader, sizeof(RRESInfoHeader), 1, rresFile);
+            
+            // Register data type and parameters
+            rres.type = infoHeader.dataType;
+            rres.param1 = infoHeader.param1;
+            rres.param2 = infoHeader.param2;
+            rres.param3 = infoHeader.param3;
+            rres.param4 = infoHeader.param4;
+
+            // Read resource data block
+            void *data = RRES_MALLOC(infoHeader.dataSize);
+            fread(data, infoHeader.dataSize, 1, rresFile);
+
+            if (infoHeader.compType == RRES_COMP_DEFLATE)
+            {
+                void *uncompData = DecompressData(data, infoHeader.dataSize, infoHeader.uncompSize);
+                
+                rres.data = uncompData;
+                
+                RRES_FREE(data);
+            }
+            else rres.data = data;
+
+            if (rres.data != NULL) TraceLog(INFO, "[%s] Resource data loaded successfully", fileName);
+        }
+
+        fclose(rresFile);
+    }
+
+    return rres;
+}
+
+// Load resource from file by id
+// NOTE: Returns uncompressed data with parameters, search resource by id
+RRESDEF RRESData LoadResourceById(const char *fileName, int rresId)
+{
+    RRESData rres = { 0 };
+    
+    RRESFileHeader fileHeader;
+    RRESInfoHeader infoHeader;
+    
+    FILE *rresFile = fopen(fileName, "rb");
+
+    if (rresFile == NULL) TraceLog(WARNING, "[%s] rRES raylib resource file could not be opened", fileName);
+    else
+    {
+        // Read rres file info header
+        fread(&fileHeader.id[0], sizeof(char), 1, rresFile);
+        fread(&fileHeader.id[1], sizeof(char), 1, rresFile);
+        fread(&fileHeader.id[2], sizeof(char), 1, rresFile);
+        fread(&fileHeader.id[3], sizeof(char), 1, rresFile);
+        fread(&fileHeader.version, sizeof(short), 1, rresFile);
+        fread(&fileHeader.count, sizeof(short), 1, rresFile);
+
+        // Verify "rRES" identifier
+        if ((fileHeader.id[0] != 'r') && (fileHeader.id[1] != 'R') && (fileHeader.id[2] != 'E') && (fileHeader.id[3] != 'S'))
+        {
+            TraceLog(WARNING, "[%s] This is not a valid raylib resource file", fileName);
+        }
+        else
+        {
+            for (int i = 0; i < fileHeader.count; i++)
+            {
+                // Read resource info and parameters
+                fread(&infoHeader, sizeof(RRESInfoHeader), 1, rresFile);
+
+                if (infoHeader.id == rresId)
+                {
+                    // Register data type and parameters
+                    rres.type = infoHeader.dataType;
+                    rres.param1 = infoHeader.param1;
+                    rres.param2 = infoHeader.param2;
+                    rres.param3 = infoHeader.param3;
+                    rres.param4 = infoHeader.param4;
+
+                    // Read resource data block
+                    void *data = RRES_MALLOC(infoHeader.dataSize);
+                    fread(data, infoHeader.dataSize, 1, rresFile);
+
+                    if (infoHeader.compType == RRES_COMP_DEFLATE)
+                    {
+                        void *uncompData = DecompressData(data, infoHeader.dataSize, infoHeader.uncompSize);
+                        
+                        rres.data = uncompData;
+                        
+                        RRES_FREE(data);
+                    }
+                    else rres.data = data;
+
+                    if (rres.data != NULL) TraceLog(INFO, "[%s][ID %i] Resource data loaded successfully", fileName, (int)rresId);
+                }
+                else
+                {
+                    // Skip required data to read next resource infoHeader
+                    fseek(rresFile, infoHeader.dataSize, SEEK_CUR);
+                }
+            }
+            
+            if (rres.data == NULL) TraceLog(WARNING, "[%s][ID %i] Requested resource could not be found, wrong id?", fileName, (int)rresId);
+        }
+
+        fclose(rresFile);
+    }
+
+    return rres;
+}
+
+RRESDEF void UnloadResource(RRESData rres)
+{
+    if (rres.data != NULL) free(rres.data);
+}
+
+//----------------------------------------------------------------------------------
+// Module specific Functions Definition
+//----------------------------------------------------------------------------------
+
+// Data decompression function
+// NOTE: Allocated data MUST be freed by user
+static void *DecompressData(const unsigned char *data, unsigned long compSize, int uncompSize)
+{
+    int tempUncompSize;
+    void *uncompData;
+
+    // Allocate buffer to hold decompressed data
+    uncompData = (mz_uint8 *)RRES_MALLOC((size_t)uncompSize);
+
+    // Check correct memory allocation
+    if (uncompData == NULL)
+    {
+        TraceLog(WARNING, "Out of memory while decompressing data");
+    }
+    else
+    {
+        // Decompress data
+        tempUncompSize = tinfl_decompress_mem_to_mem(uncompData, (size_t)uncompSize, data, compSize, 1);
+
+        if (tempUncompSize == -1)
+        {
+            TraceLog(WARNING, "Data decompression failed");
+            RRES_FREE(uncompData);
+        }
+
+        if (uncompSize != (int)tempUncompSize)
+        {
+            TraceLog(WARNING, "Expected uncompressed size do not match, data may be corrupted");
+            TraceLog(WARNING, " -- Expected uncompressed size: %i", uncompSize);
+            TraceLog(WARNING, " -- Returned uncompressed size: %i", tempUncompSize);
+        }
+
+        TraceLog(INFO, "Data decompressed successfully from %u bytes to %u bytes", (mz_uint32)compSize, (mz_uint32)tempUncompSize);
+    }
+
+    return uncompData;
+}
+
+
+// Some required functions for rres standalone module version
+#if defined(RRES_STANDALONE)
+// Outputs a trace log message (INFO, ERROR, WARNING)
+// NOTE: If a file has been init, output log is written there
+void TraceLog(int msgType, const char *text, ...)
+{
+    va_list args;
+    int traceDebugMsgs = 0;
+
+#ifdef DO_NOT_TRACE_DEBUG_MSGS
+    traceDebugMsgs = 0;
+#endif
+
+    switch (msgType)
+    {
+        case INFO: fprintf(stdout, "INFO: "); break;
+        case ERROR: fprintf(stdout, "ERROR: "); break;
+        case WARNING: fprintf(stdout, "WARNING: "); break;
+        case DEBUG: if (traceDebugMsgs) fprintf(stdout, "DEBUG: "); break;
+        default: break;
+    }
+
+    if ((msgType != DEBUG) || ((msgType == DEBUG) && (traceDebugMsgs)))
+    {
+        va_start(args, text);
+        vfprintf(stdout, text, args);
+        va_end(args);
+
+        fprintf(stdout, "\n");
+    }
+
+    if (msgType == ERROR) exit(1);      // If ERROR message, exit program
+}
+#endif
+
+#endif // RAYGUI_IMPLEMENTATION
+
+
+/*
+//T LoadResource(const char *rresFileName, int resId);
+
+// ASSUMPTION: rRES files only contain one resource (solution to id requirement...)
+
+// Now, rres file check and data loading can be managed inside each function:
+Image LoadImage();          // -> Texture2D
+Wave LoadWave()             // -> Sound, Music
+const char *LoadText();     // -> Shader, Material
+
+// NOTE: RRESData uses void* data pointer, so we can load to image.data, wave.data, mesh.*, (unsigned char *)
+
+Image LoadImagePro(void *data, int width, int height, int format);
+Image LoadImagePro(rres.data, rres.param1, rres.param2, rres.param3);
+
+Mesh LoadMeshEx(int numVertex, float *vData, float *vtData, float *vnData, Color *cData);
+Mesh LoadMeshEx(rres.param1, rres.data, rres.data + offset, rres.data + offset*2, rres.data + offset*3);
+
+Shader LoadShaderV(const char *vsText, int vsLength);
+Shader LoadShaderV(rres.data, rres.param1);
+
+Wave LoadWaveEx(void *data, int sampleCount, int sampleRate, int sampleSize, int channels);
+Wave LoadWaveEx(rres.data, rres.param1, (int)rres.param2, (int)rres.param3, (int)rres.param4);
+
+// Max value for an unsigned short: 65535
+
+// Parameters information depending on resource type (IMAGE, WAVE, MESH, TEXT)
+
+// Image data params
+int imgWidth, imgHeight;
+char colorFormat, mipmaps;
+
+// Wave data params
+short sampleRate, bps;
+char channels, reserved;
+
+// Mesh data params
+int vertexCount, reserved;
+short vertexTypesMask, vertexFormatsMask;
+
+// Text data params
+int numChars;
+char textFormat, language, charsetCode;
+*/
\ No newline at end of file