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https://github.com/Karmaz95/Snake_Apple.git
synced 2026-03-30 14:00:16 +02:00
Updated, but still need some work
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Karmaz95
@@ -1,106 +1,166 @@
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// Compile command:
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// clang++ -framework IOKit -framework CoreFoundation -framework IOSurface AppleJPEGDriver_method_1.cpp -o AppleJPEGDriver_method_1
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#include <IOKit/IOKitLib.h>
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#include <IOSurface/IOSurface.h>
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#include <CoreVideo/CVPixelBuffer.h>
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#include <stdio.h>
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#include <string.h>
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/**
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* Creates an IOSurface with JPEG format specifications
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* IOSurface is a memory buffer that can be shared between processes and hardware
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* @return The unique identifier of the created surface
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*
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* @details This function sets up an IOSurface with specific parameters:
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* - 32x32 pixel dimensions
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* - 0x10000 bytes allocation size
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* - JPEG format specification
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* - Global sharing enabled
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*
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* @return The unique identifier of the created surface, or 0 on failure
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*/
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static uint32_t create_surface(void) {
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// Create a mutable dictionary to hold surface properties
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CFMutableDictionaryRef dict = CFDictionaryCreateMutable(NULL, 0,
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&kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
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// Define basic surface properties
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// These values are minimal requirements for JPEG processing
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int width = 32, height = 32; // Dimensions of the surface
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int size = 32768; // Buffer size in bytes
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int format = 'JPEG'; // Surface pixel format
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if (!dict) return 0;
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// Set required surface properties in the dictionary
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// IOSurfaceIsGlobal: Makes surface accessible system-wide
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// Define surface parameters
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int width = 32;
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int height = 32;
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int alloc_size = 0x10000;
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int format = 'JPEG'; // Using JPEG format identifier
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// Set surface as globally accessible
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CFDictionarySetValue(dict, CFSTR("IOSurfaceIsGlobal"), kCFBooleanTrue);
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// Set surface dimensions
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CFDictionarySetValue(dict, CFSTR("IOSurfaceWidth"),
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CFNumberCreate(NULL, kCFNumberSInt32Type, &width));
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CFDictionarySetValue(dict, CFSTR("IOSurfaceHeight"),
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CFNumberCreate(NULL, kCFNumberSInt32Type, &height));
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// Set buffer size
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CFDictionarySetValue(dict, CFSTR("IOSurfaceAllocSize"),
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CFNumberCreate(NULL, kCFNumberSInt32Type, &size));
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// Set pixel format
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CFDictionarySetValue(dict, CFSTR("IOSurfacePixelFormat"),
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CFNumberCreate(NULL, kCFNumberSInt32Type, &format));
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// Create the surface and get its ID
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// Create CF numbers for surface properties
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CFNumberRef w = CFNumberCreate(NULL, kCFNumberSInt32Type, &width);
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CFNumberRef h = CFNumberCreate(NULL, kCFNumberSInt32Type, &height);
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CFNumberRef s = CFNumberCreate(NULL, kCFNumberSInt32Type, &alloc_size);
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CFNumberRef f = CFNumberCreate(NULL, kCFNumberSInt32Type, &format);
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// Set surface properties in dictionary
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CFDictionarySetValue(dict, CFSTR("IOSurfaceWidth"), w);
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CFDictionarySetValue(dict, CFSTR("IOSurfaceHeight"), h);
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CFDictionarySetValue(dict, CFSTR("IOSurfaceAllocSize"), s);
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CFDictionarySetValue(dict, CFSTR("IOSurfacePixelFormat"), f);
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// Create the surface with our specifications
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IOSurfaceRef surface = IOSurfaceCreate(dict);
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if (!surface) {
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CFRelease(w); CFRelease(h); CFRelease(s); CFRelease(f); CFRelease(dict);
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return 0;
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}
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// Get surface ID and retain the surface
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uint32_t id = IOSurfaceGetID(surface);
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CFRelease(dict); // Clean up the dictionary
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CFRetain(surface);
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// Clean up allocated resources
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CFRelease(w); CFRelease(h); CFRelease(s); CFRelease(f); CFRelease(dict);
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return id;
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}
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/**
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* Input structure for the AppleJPEGDriver
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* This structure defines the parameters needed for JPEG processing operations
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* Total size: 88 bytes
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*
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* @note Structure must be exactly 88 bytes (0x58) in size
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* @note Fields marked as reserved should not be modified
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*/
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struct AppleJPEGDriverIOStruct {
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uint32_t src_surface; // Source IOSurface ID
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uint32_t input_size; // Size of input buffer
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uint32_t dst_surface; // Destination IOSurface ID
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uint32_t src_surface; // Source surface ID
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uint32_t input_size; // Size of input data
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uint32_t dst_surface; // Destination surface ID
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uint32_t output_size; // Size of output buffer
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uint32_t reserved1[2]; // Reserved fields
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uint32_t pixelX; // X dimension in pixels
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uint32_t pixelY; // Y dimension in pixels
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uint32_t reserved1[2]; // Reserved fields (previously input/output length)
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uint32_t pixelX; // X dimension in pixels
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uint32_t pixelY; // Y dimension in pixels
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uint32_t reserved2; // Reserved field
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uint32_t xOffset; // X offset for processing
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uint32_t yOffset; // Y offset for processing
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uint32_t subsampling; // Subsampling mode
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uint32_t callback; // Callback function pointer
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uint32_t xOffset; // X offset for processing
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uint32_t yOffset; // Y offset for processing
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uint32_t subsampling; // Subsampling mode (must be 0-4)
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uint32_t callback; // Callback address
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uint32_t reserved3[3]; // Reserved fields
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uint32_t value100; // Configuration value
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uint32_t value100; // Value set to 100
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uint32_t reserved4[2]; // Reserved fields
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uint32_t decodeWidth; // Width for decoding
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uint32_t decodeHeight; // Height for decoding
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uint32_t decodeWidth; // Width for decoding
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uint32_t decodeHeight; // Height for decoding
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uint32_t reserved5; // Reserved field
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} __attribute__((packed)); // Ensure tight packing of structure
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} __attribute__((packed));
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int main() {
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// Create two IOSurfaces: one for input, one for output
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// Create source and destination surfaces
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uint32_t src = create_surface();
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uint32_t dst = create_surface();
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// Establish connection with AppleJPEGDriver
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// Connect to the AppleJPEGDriver
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io_connect_t conn;
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IOServiceOpen(IOServiceGetMatchingService(kIOMainPortDefault,
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IOServiceMatching("AppleJPEGDriver")), mach_task_self(), 1, &conn);
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io_service_t service = IOServiceGetMatchingService(kIOMainPortDefault,
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IOServiceMatching("AppleJPEGDriver"));
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if (!service) {
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printf("Driver not found\n");
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return 1;
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}
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// Initialize the driver input structure with desired parameters
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struct AppleJPEGDriverIOStruct input = {
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.src_surface = src, // Source surface ID
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.dst_surface = dst, // Destination surface ID
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.input_size = 2000, // Input buffer size
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.output_size = 0x1000, // Output buffer size
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.pixelX = 100, // X dimension
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.pixelY = 3, // Y dimension
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.xOffset = 0xd, // X offset
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.yOffset = 0xff, // Y offset
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.value100 = 100, // Configuration value
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.decodeWidth = 5, // Decode width
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.decodeHeight = 10 // Decode height
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};
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// Open a connection to the driver
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kern_return_t kr = IOServiceOpen(service, mach_task_self(), 1, &conn);
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if (kr != KERN_SUCCESS) {
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printf("Open failed: %x\n", kr);
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return 1;
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}
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// Prepare output buffer for driver response
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char output[65536];
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// Initialize driver input structure
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struct AppleJPEGDriverIOStruct input = {};
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memset(&input, 0, sizeof(input));
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// Configure input parameters
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input.src_surface = src;
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input.input_size = 2000;
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input.dst_surface = dst;
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input.output_size = 0x1000;
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input.pixelX = 100;
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input.pixelY = 3;
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input.xOffset = 0xd;
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input.yOffset = 0xff;
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input.subsampling = 0;
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input.callback = 0x41414141;
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input.value100 = 100;
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input.decodeWidth = 5;
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input.decodeHeight = 10;
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// Verify structure size and print configuration
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printf("Structure size: %zu (should be 88)\n", sizeof(input));
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printf("Surface IDs: src=0x%x dst=0x%x\n", src, dst);
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printf("Input params:\n"
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" sizes: %u/%u\n"
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" pixels: %u/%u\n"
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" decode: %u/%u\n"
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" offset: %u/%u\n",
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input.input_size, input.output_size,
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input.pixelX, input.pixelY,
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input.decodeWidth, input.decodeHeight,
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input.xOffset, input.yOffset);
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// Prepare output buffer and call driver
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char output[88] = {0};
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size_t output_size = sizeof(output);
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// Call IOKit method #1 on the connection, passing input/output buffers
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// kr: stores kernel return code (KERN_SUCCESS = 0 on success)
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// conn: connection to IOKit driver/service
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// 1: selector/method number to call
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// &input: pointer to input structure
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// sizeof(input): size of input buffer in bytes
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// output: buffer to receive output data
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// &output_size: pointer to size of output buffer (updated with actual bytes written)
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kr = IOConnectCallStructMethod(conn, 1, &input, sizeof(input), output, &output_size);
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// Call the driver's method 1 with our input structure
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kern_return_t kr = IOConnectCallStructMethod(conn, 1, &input,
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sizeof(input), output, &output_size);
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// Print the result of the operation
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// Print result and clean up
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printf("Result: 0x%x (%s)\n", kr, mach_error_string(kr));
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IOServiceClose(conn);
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IOObjectRelease(service);
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return 0;
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}
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