video.c

Go to the documentation of this file.

/**
 * @file
 * @ingroup graphics
 * @brief Video resource shutdown and palette allocation.
 *
 * Address range 4318f0-431a0f.
 */
#include "wc1.h"
#include <dos.h>
#include <sys/types.h>
 
short nVideoMode = -1; /* 0x0046b168 */
 
 
/* Linker commons defined here; LINK orders them by identifier hash. */
int aiPilotLevel[12]; /* 0x0059cf30 */
short asTargetListRangesArray[16]; /* 0x0059cf60 */
short asObjectDrawPosY[SPACE_OBJECT_COUNT]; /* 0x0059cf80 */
short asObjectDrawPosX[SPACE_OBJECT_COUNT]; /* 0x0059d000 */
short asPreviousObjectDistance[SPACE_OBJECT_COUNT]; /* 0x0059d080 */
enum ObjectClass aeObjectClass[SPACE_OBJECT_COUNT]; /* 0x0059d100 */
enum ShipObjective aeShipObjectiveList[12]; /* 0x0059d200 */
short asObjectViewFrames[SPACE_OBJECT_COUNT]; /* 0x0059d230 */
int nCurObjectiveRangeValue; /* 0x0059d2b0 */
signed char acWingmanMessageStatesArray[16]; /* 0x0059d2c0 */
short asCollisionDelayList[16]; /* 0x0059d2d0 */
 
/* Function start: 0x4318F0 */
void __stdcall ShutdownVideoHook(short mode)
{
    ReleaseVideoResourcesHook();
}
 
/* Function start: 0x431900 */
short __stdcall ReserveContiguousPaletteEntries(short entryCount)
{
    short entry;
    short freeEntries;
    short firstEntry;
 
    firstEntry = 0;
    freeEntries = 0;
    entry = 0;
    for (;;) {
        if (awPalEntryAllocation[entry] != 0) {
            freeEntries = 0;
            firstEntry = (short)(entry + 1);
        } else
            freeEntries++;
        if (freeEntries == entryCount)
            break;
        entry++;
        if (entry >= 256)
            return -1;
    }
 
    for (freeEntries = 0; freeEntries < entryCount; freeEntries++) {
        awPalEntryAllocation[firstEntry + freeEntries] =
            entryCount;
    }
    return firstEntry;
}
 
/* Function start: 0x431970 */
void __stdcall ReleaseContiguousPaletteEntries(short firstEntry)
{
    short entry;
    short entryCount;
 
    entry = 0;
    entryCount = awPalEntryAllocation[firstEntry];
    while (entry < entryCount) {
        awPalEntryAllocation[firstEntry + entry] = 0;
        entry++;
    }
}
 
/* Function start: 0x4319B0 */
void PrintPaletteAllocationMap(void)
{
    short index;
    short row;
    short column;
 
    index = 0;
    row = 4;
    do {
        column = 0x40;
        do {
            printf("%c", awPalEntryAllocation[index++] < 1 ?
                   '_' : '.');
            column--;
        } while (column != 0);
        printf("\n");
        row--;
    } while (row != 0);
}