114 lines
4.8 KiB
C
114 lines
4.8 KiB
C
// Load files from CD and execute them
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// Schnappy 07-2021
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// based on Lameguy64's tutorial : http://lameguy64.net/svn/pstutorials/chapter1/1-display.html
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#include <sys/types.h>
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#include <stdio.h>
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#include <libgte.h>
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#include <libetc.h>
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#include <libgpu.h>
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#include <libapi.h>
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#include <malloc.h>
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// CD library
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#include <libcd.h>
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#define VMODE 0 // Video Mode : 0 : NTSC, 1: PAL
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#define SCREENXRES 320 // Screen width
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#define SCREENYRES 240 + (VMODE << 4) // Screen height : If VMODE is 0 = 240, if VMODE is 1 = 256
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#define CENTERX SCREENXRES/2 // Center of screen on x
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#define CENTERY SCREENYRES/2 // Center of screen on y
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#define MARGINX 0 // margins for text display
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#define MARGINY 32
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#define FONTSIZE 8 * 7 // Text Field Height
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DISPENV disp[2]; // Double buffered DISPENV and DRAWENV
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DRAWENV draw[2];
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short db = 0; // index of which buffer is used, values 0, 1
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#define CD_SECTOR_SIZE 2048
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// Converting bytes to sectors SECTOR_SIZE is defined in words, aka int
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#define BtoS(len) ( ( len + CD_SECTOR_SIZE - 1 ) / CD_SECTOR_SIZE )
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// Name of file to load
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static char * exeFile;
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CdlFILE filePos = {0};
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struct EXEC * exeStruct;
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void * ramAddr = (void *)0x80030D40; // https://discord.com/channels/642647820683444236/663664210525290507/864936962199781387
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//~ static unsigned char gHeapBuffer[0x40000];
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u_long * buffer;
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u_char CtrlResult[8];
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int CDreadOK = 0;
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int CDreadResult = 0;
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void init(void)
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{
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ResetGraph(0); // Initialize drawing engine with a complete reset (0)
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SetDefDispEnv(&disp[0], 0, 0 , SCREENXRES, SCREENYRES); // Set display area for both &disp[0] and &disp[1]
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SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES); // &disp[0] is on top of &disp[1]
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SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES); // Set draw for both &draw[0] and &draw[1]
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SetDefDrawEnv(&draw[1], 0, 0 , SCREENXRES, SCREENYRES); // &draw[0] is below &draw[1]
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// Set video mode
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if (VMODE){ SetVideoMode(MODE_PAL);}
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SetDispMask(1); // Display on screen
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setRGB0(&draw[0], 255, 50, 50); // set color for first draw area
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setRGB0(&draw[1], 255, 50, 50); // set color for second draw area
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draw[0].isbg = 1; // set mask for draw areas. 1 means repainting the area with the RGB color each frame
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draw[1].isbg = 1;
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PutDispEnv(&disp[db]); // set the disp and draw environnments
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PutDrawEnv(&draw[db]);
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FntLoad(960, 0); // Load font to vram at 960,0(+128)
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FntOpen(MARGINX, SCREENYRES - MARGINY - FONTSIZE, SCREENXRES - MARGINX * 2, FONTSIZE, 0, 280 ); // FntOpen(x, y, width, height, black_bg, max. nbr. chars
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}
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void display(void)
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{
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DrawSync(0); // Wait for all drawing to terminate
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VSync(0); // Wait for the next vertical blank
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PutDispEnv(&disp[db]); // set alternate disp and draw environnments
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PutDrawEnv(&draw[db]);
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db = !db; // flip db value (0 or 1)
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}
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int main(void)
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{
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int i = 0;
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// init() display
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init();
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// Init CD system
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CdInit();
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// Init heap
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InitHeap((void *)0x80030D40, 0x40000);
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//~ InitHeap((u_long *)gHeapBuffer, sizeof(gHeapBuffer));
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// Set name of file to load
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exeFile = "\\POLY.EXE;1";
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// Get file position from filename
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CdSearchFile( &filePos, exeFile);
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// Allocate memory
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//~ EnterCriticalSection();
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buffer = malloc( BtoS(filePos.size)*CD_SECTOR_SIZE);
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//~ ExitCriticalSection();
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// Issue CdlSetloc CDROM command : Set the seek target position
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// Beware of a misnomed 'sector' member in the CdlLOC struct that should really be named 'frame'.
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// https://discord.com/channels/642647820683444236/663664210525290507/864912470996942910
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CdControl(CdlSetloc, (u_char *)&filePos.pos, CtrlResult);
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// Read data
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CDreadOK = CdRead( (int)BtoS(filePos.size), (u_long *)buffer, CdlModeSpeed);
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// Wait for operation to complete
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CDreadResult = CdReadSync(0, 0);
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while (1) // infinite loop
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{
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// Load file from CD
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//~ CdReadExec(exeFile);
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// Execute file
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//~ StopCallback();
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//~ ResetGraph(3);
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//~ Exec(exeStruct,0,0);
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i++;
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FntPrint("Hello CD! %d\n", i); // Send string to print stream
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FntPrint("Heap: - Buf: %x\n", buffer); // Send string to print stream
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FntPrint("CdCtrl : %d\nRead : %d %d\n", CtrlResult[0], CDreadOK, CDreadResult);
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FntPrint("Size B: %d S: %d", filePos.size, BtoS(filePos.size)); // Send string to print stream
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FntFlush(-1); // Draw printe stream
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display(); // Execute display()
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}
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return 0;
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}
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