--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/64vw.c	Tue Dec 12 01:59:29 2017 +0200
@@ -0,0 +1,489 @@
+/*
+ * view64 - Display some C64 etc graphics formats via libSDL
+ * Programmed and designed by Matti 'ccr' Hamalainen
+ * (C) Copyright 2012 Tecnic Software productions (TNSP)
+ *
+ * Please read file 'COPYING' for information on license and distribution.
+ */
+#include "dmlib.h"
+#include "dmargs.h"
+#include "dmfile.h"
+#include "lib64gfx.h"
+#include <SDL.h>
+
+
+int    optVFlags = SDL_SWSURFACE | SDL_HWPALETTE;
+int    optScrWidth, optScrHeight;
+int    optForcedFormat = -1;
+BOOL   optProbeOnly = FALSE;
+size_t noptFilenames1 = 0, noptFilenames2 = 0;
+char   **optFilenames = NULL;
+
+
+static const DMOptArg optList[] =
+{
+    { 0, '?', "help",       "Show this help", OPT_NONE },
+    { 1, 'v', "verbose",    "Be more verbose", OPT_NONE },
+    { 2,   0, "fs",         "Fullscreen", OPT_NONE },
+    { 3, 'S', "scale",      "Scale image by factor (1-10)", OPT_ARGREQ },
+    { 4, 'f', "format",     "Force input format (see list below)", OPT_ARGREQ },
+    { 5, 'p', "probe",      "Probe only (no display)", OPT_NONE },
+};
+
+const int optListN = sizeof(optList) / sizeof(optList[0]);
+
+
+void dmSetScaleFactor(float factor)
+{
+    optScrWidth = (int) ((float) C64_SCR_WIDTH * factor * C64_SCR_PAR_XY);
+    optScrHeight = (int) ((float) C64_SCR_HEIGHT * factor);
+}
+
+
+void argShowHelp()
+{
+    dmPrintBanner(stdout, dmProgName, "[options] <input image file>");
+    dmArgsPrintHelp(stdout, optList, optListN, 0);
+
+    printf("\nAvailable bitmap formats:\n");
+    for (int i = 0; i < ndmC64ImageFormats; i++)
+    {
+        const DMC64ImageFormat *fmt = &dmC64ImageFormats[i];
+        char buf[64];
+        printf("%3d | %-5s | %-15s | %s\n",
+            i, fmt->fext,
+            dmC64GetImageTypeString(buf, sizeof(buf), fmt->type),
+            fmt->name);
+    }
+}
+
+
+BOOL argHandleOpt(const int optN, char *optArg, char *currArg)
+{
+    switch (optN)
+    {
+        case 0:
+            argShowHelp();
+            exit(0);
+            break;
+
+        case 1:
+            dmVerbosity++;
+            break;
+
+        case 2:
+            optVFlags |= SDL_FULLSCREEN;
+            break;
+
+        case 3:
+            {
+                float factor;
+                if (sscanf(optArg, "%f", &factor) == 1)
+                {
+                    if (factor < 1 || factor >= 10)
+                    {
+                        dmErrorMsg("Invalid scale factor %1.0f, see help for valid values.\n", factor);
+                        return FALSE;
+                    }
+
+                    dmSetScaleFactor(factor);
+                }
+                else
+                {
+                    dmErrorMsg("Invalid scale factor '%s'.\n", optArg);
+                    return FALSE;
+                }
+            }
+            break;
+
+        case 4:
+            {
+                int i;
+                if (sscanf(optArg, "%d", &i) == 1)
+                {
+                    if (i < 0 || i >= ndmC64ImageFormats)
+                    {
+                        dmErrorMsg("Invalid image format index %d, see help for valid values.\n", i);
+                        return FALSE;
+                    }
+                    optForcedFormat = i;
+                }
+                else
+                {
+                    dmErrorMsg("Invalid image format argument '%s'.\n", optArg);
+                    return FALSE;
+                }
+            }
+            break;
+
+        case 5:
+            if (dmVerbosity < 1)
+                dmVerbosity = 1;
+            optProbeOnly = TRUE;
+            break;
+
+        default:
+            dmErrorMsg("Unknown option '%s'.\n", currArg);
+            return FALSE;
+    }
+
+    return TRUE;
+}
+
+
+BOOL argHandleFile1(char *filename)
+{
+    (void) filename;
+
+    noptFilenames1++;
+    return TRUE;
+}
+
+
+BOOL argHandleFile2(char *filename)
+{
+    if (noptFilenames2 < noptFilenames1)
+    {
+        optFilenames[noptFilenames2++] = filename;
+        return TRUE;
+    }
+    else
+        return FALSE;
+}
+
+
+BOOL dmInitializeVideo(SDL_Surface **screen)
+{
+    *screen = SDL_SetVideoMode(optScrWidth, optScrHeight, 8, optVFlags | SDL_RESIZABLE);
+    if (*screen == NULL)
+    {
+        dmErrorMsg("Can't SDL_SetVideoMode(): %s\n", SDL_GetError());
+        return FALSE;
+    }
+    return TRUE;
+}
+
+
+void dmDumpC64Image(const char *filename, const DMC64Image *img, const DMC64ImageFormat *fmt)
+{
+    char typeStr[64];
+
+    snprintf(typeStr, sizeof(typeStr),
+        "%s%s%s%s",
+        ((img->type & D64_FMT_MC) ? "MultiColor" : "Hires"),
+        ((img->type & D64_FMT_ILACE) ? " Interlaced" : ""),
+        ((img->type & D64_FMT_FLI) ? " FLI" : ""),
+        ((img->type & D64_FMT_CHAR) ? " CHAR" : "")
+        );
+
+    dmPrint(1,
+        "\n%s\n"
+        "Format              : %s [%s]\n"
+        "Type                : %s\n"
+        "Banks               : %d\n",
+        filename,
+        fmt->name, fmt->fext,
+        typeStr,
+        img->nbanks);
+
+    if (img->type & D64_FMT_ILACE)
+    {
+        char *tmps;
+        switch(img->laceType)
+        {
+            case D64_ILACE_COLOR: tmps = "color"; break;
+            case D64_ILACE_RES: tmps = "resolution"; break;
+            default: tmps = "ERROR"; break;
+        }
+        dmPrint(1,
+            "Interlace type      : %s\n",
+            tmps);
+    }
+
+    dmPrint(1,
+        "Width x Height      : %d x %d\n"
+        "CHwidth x CHheight  : %d x %d\n",
+        img->width, img->height,
+        img->ch_width, img->ch_height);
+}
+
+
+int dmReadC64Image(const char *filename, const DMC64ImageFormat *forced, const DMC64ImageFormat **fmt, DMC64Image **cimage)
+{
+    Uint8 *dataBuf = NULL;
+    size_t dataSize;
+    int ret;
+
+    if ((ret = dmReadDataFile(NULL, filename, &dataBuf, &dataSize)) != DMERR_OK)
+        goto exit;
+
+    ret = dmC64DecodeBMP(cimage, dataBuf, dataSize, 0, 2, fmt, forced);
+
+exit:
+    dmFree(dataBuf);
+    return ret;
+}
+
+
+int dmDecodeC64Image(const DMC64Image *cimage, const DMC64ImageFormat *fmt, SDL_Surface *surf)
+{
+    DMImage bmap;
+    int ret;
+
+    bmap.size = surf->pitch * surf->h;
+    bmap.data = surf->pixels;
+    bmap.pitch = surf->pitch;
+    bmap.width = surf->w;
+    bmap.height = surf->h;
+
+    if (fmt->convertFrom != NULL)
+        ret = fmt->convertFrom(&bmap, cimage, fmt);
+    else
+        ret = dmC64ConvertGenericBMP2Image(&bmap, cimage, fmt);
+
+    return ret;
+}
+
+
+int main(int argc, char *argv[])
+{
+    SDL_Surface *screen = NULL, *surf = NULL;
+    BOOL initSDL = FALSE, exitFlag, needRedraw;
+    const DMC64ImageFormat *forced;
+    size_t currIndex, prevIndex;
+    int ret;
+
+    dmSetScaleFactor(2.0);
+
+    dmInitProg("view64", "Display some C64 bitmap graphics formats", "0.2", NULL, NULL);
+
+    // Parse arguments, round #1
+    if (!dmArgsProcess(argc, argv, optList, optListN,
+        argHandleOpt, argHandleFile1, OPTH_BAILOUT))
+        exit(1);
+
+    if (noptFilenames1 == 0)
+    {
+        dmErrorMsg("No input file(s) specified, perhaps you need some --help\n");
+        goto exit;
+    }
+
+    // Allocate space for filename pointers
+    if ((optFilenames = dmCalloc(noptFilenames1, sizeof(char *))) == NULL)
+    {
+        dmErrorMsg("Could not allocate memory for input file list.\n");
+        goto exit;
+    }
+
+    // Assign the filename pointers
+    if (!dmArgsProcess(argc, argv, optList, optListN,
+        NULL, argHandleFile2, OPTH_BAILOUT | OPTH_ONLY_OTHER))
+        goto exit;
+
+    // Check for forced input format
+    if (optForcedFormat >= 0)
+    {
+        forced = &dmC64ImageFormats[optForcedFormat];
+        dmMsg(0, "Forced %s format image, type %d, %s\n",
+            forced->name, forced->type, forced->fext);
+    }
+    else
+        forced = NULL;
+
+    // If we are simply probing, no need to initialize SDL etc
+    if (optProbeOnly)
+    {
+        for (size_t n = 0; n < noptFilenames2; n++)
+        {
+            char *filename = optFilenames[n];
+            const DMC64ImageFormat *fmt = NULL;
+            DMC64Image *cimage = NULL;
+
+            if ((ret = dmReadC64Image(filename, forced, &fmt, &cimage)) != DMERR_OK)
+            {
+                dmErrorMsg("Could not read image file '%s', %d: %s\n",
+                    filename, ret, dmErrorStr(ret));
+            }
+            else
+            {
+                dmDumpC64Image(filename, cimage, fmt);
+            }
+
+            dmC64ImageFree(cimage);
+        }
+        goto exit;
+    }
+
+    // Initialize libSDL
+    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) != 0)
+    {
+        dmErrorMsg("Could not initialize SDL: %s\n", SDL_GetError());
+        goto exit;
+    }
+    initSDL = TRUE;
+
+
+    // Open window/set video mode
+    screen = SDL_SetVideoMode(optScrWidth, optScrHeight, 8, optVFlags | SDL_RESIZABLE);
+    if (screen == NULL)
+    {
+        dmErrorMsg("Can't SDL_SetVideoMode(): %s\n", SDL_GetError());
+        goto exit;
+    }
+
+    // Start main loop
+    currIndex = 0;
+    prevIndex = 1;
+    needRedraw = TRUE;
+    exitFlag = FALSE;
+    while (!exitFlag)
+    {
+        SDL_Event event;
+        while (SDL_PollEvent(&event))
+        switch (event.type)
+        {
+            case SDL_KEYDOWN:
+                switch (event.key.keysym.sym)
+                {
+                    case SDLK_ESCAPE:
+                    case SDLK_q:
+                        exitFlag = TRUE;
+                        break;
+
+                    case SDLK_LEFT:
+                        if (currIndex > 0)
+                            currIndex--;
+                        break;
+
+                    case SDLK_RIGHT:
+                        if (currIndex < noptFilenames2 - 1)
+                            currIndex++;
+                        break;
+
+                    default:
+                        break;
+                }
+
+                needRedraw = TRUE;
+                break;
+
+            case SDL_VIDEORESIZE:
+                optScrWidth  = event.resize.w;
+                optScrHeight = event.resize.h;
+                if (!dmInitializeVideo(&screen))
+                    goto exit;
+
+                needRedraw = TRUE;
+                break;
+
+            case SDL_VIDEOEXPOSE:
+                needRedraw = TRUE;
+                break;
+
+            case SDL_QUIT:
+                goto exit;
+        }
+
+        if (currIndex != prevIndex)
+        {
+            char *filename = optFilenames[currIndex];
+            const DMC64ImageFormat *fmt = NULL;
+            DMC64Image *cimage = NULL;
+            char *title = NULL;
+
+            if (surf != NULL)
+            {
+                SDL_FreeSurface(surf);
+                surf = NULL;
+            }
+
+            if ((ret = dmReadC64Image(filename, forced, &fmt, &cimage)) != DMERR_OK)
+            {
+                dmErrorMsg("Failed to decode bitmap data %d: %s\n", ret, dmErrorStr(ret));
+                goto fail;
+            }
+
+            if (fmt == NULL || cimage == NULL)
+            {
+                dmErrorMsg("Probing could not find any matching image format. Perhaps try forcing a format via -f.\n");
+                goto fail;
+            }
+
+            // Create surface (we are lazy and ugly)
+            if ((surf = SDL_CreateRGBSurface(SDL_SWSURFACE, cimage->width, cimage->height, 8, 0, 0, 0, 0)) == NULL)
+            {
+                dmErrorMsg("Could not allocate surface.\n");
+                goto exit;
+            }
+
+            if (dmDecodeC64Image(cimage, fmt, surf) == DMERR_OK)
+            {
+                title = dm_strdup_printf("%s - %s (%d x %d) [%d / %d]",
+                    dmProgName, filename,
+                    cimage->width, cimage->height,
+                    currIndex + 1, noptFilenames2);
+
+                dmDumpC64Image(filename, cimage, fmt);
+            }
+
+fail:
+            if (surf == NULL && (surf = SDL_CreateRGBSurface(SDL_SWSURFACE, 320, 200, 8, 0, 0, 0, 0)) == NULL)
+            {
+                dmErrorMsg("Could not allocate surface.\n");
+                goto exit;
+            }
+
+            if (title == NULL)
+            {
+                title = dm_strdup_printf("%s [%d / %d]",
+                    dmProgName,
+                    currIndex + 1, noptFilenames2);
+            }
+
+            SDL_WM_SetCaption(title, dmProgName);
+            dmFree(title);
+
+            needRedraw = TRUE;
+            prevIndex = currIndex;
+        }
+
+        if (needRedraw)
+        {
+            float aspect = (float) surf->h / (float) surf->w;
+            int sheight = optScrHeight / aspect;
+            int ypos = (optScrHeight - sheight) / 2;
+
+            if (SDL_MUSTLOCK(screen) != 0 && SDL_LockSurface(screen) != 0)
+            {
+                dmErrorMsg("Can't lock surface.\n");
+                goto exit;
+            }
+
+            dmScaledBlitSurface8to8(surf, 0, ypos, optScrWidth, sheight, screen);
+            SDL_SetColors(screen, (SDL_Color *)dmDefaultC64Palette, 0, C64_NCOLORS);
+
+            if (SDL_MUSTLOCK(screen) != 0)
+                SDL_UnlockSurface(screen);
+
+            SDL_Flip(screen);
+            needRedraw = FALSE;
+        }
+
+        SDL_Delay(50);
+    }
+
+exit:
+    // Cleanup
+    dmFree(optFilenames);
+
+    if (screen != NULL)
+        SDL_FreeSurface(screen);
+
+    if (surf != NULL)
+        SDL_FreeSurface(surf);
+
+    if (initSDL)
+        SDL_Quit();
+
+    return 0;
+}