view test/testwin.c @ 2884:9dde605c7540

Date: Fri, 19 Dec 2008 20:17:35 +0100 From: Couriersud Subject: Re: Aw: Experience using SDL1.3 in sdlmame/Proposal for api additions > For consistency you'd probably want: > SDL_SetRenderDrawColor(Uint8 r, Uint8 g, Uint8 b, Uint8 a); > SDL_SetRenderDrawBlendMode(SDL_BlendMode blendMode); > SDL_RenderLine(int x1, int y1, int x2, int y2); > SDL_RenderFill(SDL_Rect *rect); > > You probably also want to add API functions query the current state. > I have implemented the above api for the opengl, x11, directfb and software renderers. I have also renamed *TEXTUREBLENDMODE* constants to BLENDMODE*. The unix build compiles. The windows renderer still needs to be updated, but I have no windows development machine at hand. Have a look at the x11 renderer for a sample. Vector games now run at 90% both on opengl and directfb in comparison to sdlmame's own opengl renderer. The same applies to raster games. The diff also includes a) Changed XDrawRect to XFillRect in x11 renderer b) A number of changes to fix blending and modulation issues in the directfb renderer.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 20 Dec 2008 12:00:00 +0000
parents c4eccbd21d16
children
line wrap: on
line source


/* Bring up a window and play with it */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#define BENCHMARK_SDL

#define NOTICE(X)	printf("%s", X);

#include "SDL.h"

/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void
quit(int rc)
{
    SDL_Quit();
    exit(rc);
}

void
DrawPict(SDL_Surface * screen, char *bmpfile,
         int speedy, int flip, int nofade)
{
    SDL_Surface *picture;
    SDL_Rect dest, update;
    int i, centered;
    int ncolors;
    SDL_Color *colors, *cmap;

    /* Load the image into a surface */
    if (bmpfile == NULL) {
        bmpfile = "sample.bmp"; /* Sample image */
    }
    fprintf(stderr, "Loading picture: %s\n", bmpfile);
    picture = SDL_LoadBMP(bmpfile);
    if (picture == NULL) {
        fprintf(stderr, "Couldn't load %s: %s\n", bmpfile, SDL_GetError());
        return;
    }

    /* Set the display colors -- on a hicolor display this is a no-op */
    if (picture->format->palette) {
        ncolors = picture->format->palette->ncolors;
        colors = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color));
        cmap = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color));
        memcpy(colors, picture->format->palette->colors,
               ncolors * sizeof(SDL_Color));
    } else {
        int r, g, b;

        /* Allocate 256 color palette */
        ncolors = 256;
        colors = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color));
        cmap = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color));

        /* Set a 3,3,2 color cube */
        for (r = 0; r < 8; ++r) {
            for (g = 0; g < 8; ++g) {
                for (b = 0; b < 4; ++b) {
                    i = ((r << 5) | (g << 2) | b);
                    colors[i].r = r << 5;
                    colors[i].g = g << 5;
                    colors[i].b = b << 6;
                }
            }
        }
    }
    NOTICE("testwin: setting colors\n");
    if (!SDL_SetColors(screen, colors, 0, ncolors) &&
        (screen->format->palette != NULL)) {
        fprintf(stderr,
                "Warning: Couldn't set all of the colors, but SDL will map the image\n"
                "         (colormap fading will suffer - try the -warp option)\n");
    }

    /* Display the picture */
    if (speedy) {
        SDL_Surface *displayfmt;

        fprintf(stderr, "Converting picture\n");
        displayfmt = SDL_DisplayFormat(picture);
        if (displayfmt == NULL) {
            fprintf(stderr, "Couldn't convert image: %s\n", SDL_GetError());
            goto done;
        }
        SDL_FreeSurface(picture);
        picture = displayfmt;
    }
    printf("(image surface located in %s memory)\n",
           (picture->flags & SDL_HWSURFACE) ? "video" : "system");
    centered = (screen->w - picture->w) / 2;
    if (centered < 0) {
        centered = 0;
    }
    dest.y = (screen->h - picture->h) / 2;
    dest.w = picture->w;
    dest.h = picture->h;
    NOTICE("testwin: moving image\n");
    for (i = 0; i <= centered; ++i) {
        dest.x = i;
        update = dest;
        if (SDL_BlitSurface(picture, NULL, screen, &update) < 0) {
            fprintf(stderr, "Blit failed: %s\n", SDL_GetError());
            break;
        }
        if (flip) {
            SDL_Flip(screen);
        } else {
            SDL_UpdateRects(screen, 1, &update);
        }
    }

#ifdef SCREENSHOT
    if (SDL_SaveBMP(screen, "screen.bmp") < 0)
        printf("Couldn't save screen: %s\n", SDL_GetError());
#endif

#ifndef BENCHMARK_SDL
    /* Let it sit there for a while */
    SDL_Delay(5 * 1000);
#endif
    /* Fade the colormap */
    if (!nofade) {
        int maxstep;
        SDL_Color final;
        SDL_Color palcolors[256];
        struct
        {
            Sint16 r, g, b;
        } cdist[256];

        NOTICE("testwin: fading out...\n");
        memcpy(cmap, colors, ncolors * sizeof(SDL_Color));
        maxstep = 32 - 1;
        final.r = 0xFF;
        final.g = 0x00;
        final.b = 0x00;
        memcpy(palcolors, colors, ncolors * sizeof(SDL_Color));
        for (i = 0; i < ncolors; ++i) {
            cdist[i].r = final.r - palcolors[i].r;
            cdist[i].g = final.g - palcolors[i].g;
            cdist[i].b = final.b - palcolors[i].b;
        }
        for (i = 0; i <= maxstep / 2; ++i) {    /* halfway fade */
            int c;
            for (c = 0; c < ncolors; ++c) {
                colors[c].r = palcolors[c].r + ((cdist[c].r * i)) / maxstep;
                colors[c].g = palcolors[c].g + ((cdist[c].g * i)) / maxstep;
                colors[c].b = palcolors[c].b + ((cdist[c].b * i)) / maxstep;
            }
            SDL_SetColors(screen, colors, 0, ncolors);
            SDL_Delay(1);
        }
        final.r = 0x00;
        final.g = 0x00;
        final.b = 0x00;
        memcpy(palcolors, colors, ncolors * sizeof(SDL_Color));
        for (i = 0; i < ncolors; ++i) {
            cdist[i].r = final.r - palcolors[i].r;
            cdist[i].g = final.g - palcolors[i].g;
            cdist[i].b = final.b - palcolors[i].b;
        }
        maxstep /= 2;
        for (i = 0; i <= maxstep; ++i) {        /* finish fade out */
            int c;
            for (c = 0; c < ncolors; ++c) {
                colors[c].r = palcolors[c].r + ((cdist[c].r * i)) / maxstep;
                colors[c].g = palcolors[c].g + ((cdist[c].g * i)) / maxstep;
                colors[c].b = palcolors[c].b + ((cdist[c].b * i)) / maxstep;
            }
            SDL_SetColors(screen, colors, 0, ncolors);
            SDL_Delay(1);
        }
        for (i = 0; i < ncolors; ++i) {
            colors[i].r = final.r;
            colors[i].g = final.g;
            colors[i].b = final.b;
        }
        SDL_SetColors(screen, colors, 0, ncolors);
        NOTICE("testwin: fading in...\n");
        memcpy(palcolors, colors, ncolors * sizeof(SDL_Color));
        for (i = 0; i < ncolors; ++i) {
            cdist[i].r = cmap[i].r - palcolors[i].r;
            cdist[i].g = cmap[i].g - palcolors[i].g;
            cdist[i].b = cmap[i].b - palcolors[i].b;
        }
        for (i = 0; i <= maxstep; ++i) {        /* 32 step fade in */
            int c;
            for (c = 0; c < ncolors; ++c) {
                colors[c].r = palcolors[c].r + ((cdist[c].r * i)) / maxstep;
                colors[c].g = palcolors[c].g + ((cdist[c].g * i)) / maxstep;
                colors[c].b = palcolors[c].b + ((cdist[c].b * i)) / maxstep;
            }
            SDL_SetColors(screen, colors, 0, ncolors);
            SDL_Delay(1);
        }
        NOTICE("testwin: fading over\n");
    }

  done:
    /* Free the picture and return */
    SDL_FreeSurface(picture);
    free(colors);
    free(cmap);
    return;
}

int
main(int argc, char *argv[])
{
    SDL_Surface *screen;
    /* Options */
    int speedy, flip, nofade;
    int delay;
    int w, h;
    int desired_bpp;
    Uint32 video_flags;
#ifdef BENCHMARK_SDL
    Uint32 then, now;
#endif
    /* Set default options and check command-line */
    speedy = 0;
    flip = 0;
    nofade = 0;
    delay = 1;

#ifdef _WIN32_WCE
    w = 240;
    h = 320;
    desired_bpp = 8;
    video_flags = SDL_FULLSCREEN;
#else
    w = 640;
    h = 480;
    desired_bpp = 0;
    video_flags = 0;
#endif
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
        return (1);
    }

    while (argc > 1) {
        if (strcmp(argv[1], "-speedy") == 0) {
            speedy = 1;
            argv += 1;
            argc -= 1;
        } else if (strcmp(argv[1], "-nofade") == 0) {
            nofade = 1;
            argv += 1;
            argc -= 1;
        } else if (strcmp(argv[1], "-delay") == 0) {
            if (argv[2]) {
                delay = atoi(argv[2]);
                argv += 2;
                argc -= 2;
            } else {
                fprintf(stderr, "The -delay option requires an argument\n");
                quit(1);
            }
        } else if (strcmp(argv[1], "-width") == 0) {
            if (argv[2] && ((w = atoi(argv[2])) > 0)) {
                argv += 2;
                argc -= 2;
            } else {
                fprintf(stderr, "The -width option requires an argument\n");
                quit(1);
            }
        } else if (strcmp(argv[1], "-height") == 0) {
            if (argv[2] && ((h = atoi(argv[2])) > 0)) {
                argv += 2;
                argc -= 2;
            } else {
                fprintf(stderr, "The -height option requires an argument\n");
                quit(1);
            }
        } else if (strcmp(argv[1], "-bpp") == 0) {
            if (argv[2]) {
                desired_bpp = atoi(argv[2]);
                argv += 2;
                argc -= 2;
            } else {
                fprintf(stderr, "The -bpp option requires an argument\n");
                quit(1);
            }
        } else if (strcmp(argv[1], "-warp") == 0) {
            video_flags |= SDL_HWPALETTE;
            argv += 1;
            argc -= 1;
        } else if (strcmp(argv[1], "-hw") == 0) {
            video_flags |= SDL_HWSURFACE;
            argv += 1;
            argc -= 1;
        } else if (strcmp(argv[1], "-flip") == 0) {
            video_flags |= SDL_DOUBLEBUF;
            argv += 1;
            argc -= 1;
        } else if (strcmp(argv[1], "-fullscreen") == 0) {
            video_flags |= SDL_FULLSCREEN;
            argv += 1;
            argc -= 1;
        } else
            break;
    }

    /* Initialize the display */
    screen = SDL_SetVideoMode(w, h, desired_bpp, video_flags);
    if (screen == NULL) {
        fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n",
                w, h, desired_bpp, SDL_GetError());
        quit(1);
    }
    printf("Set%s %dx%dx%d mode\n",
           screen->flags & SDL_FULLSCREEN ? " fullscreen" : "",
           screen->w, screen->h, screen->format->BitsPerPixel);
    printf("(video surface located in %s memory)\n",
           (screen->flags & SDL_HWSURFACE) ? "video" : "system");
    if (screen->flags & SDL_DOUBLEBUF) {
        printf("Double-buffering enabled\n");
        flip = 1;
    }

    /* Set the window manager title bar */
    SDL_WM_SetCaption("SDL test window", "testwin");

    /* Do all the drawing work */
#ifdef BENCHMARK_SDL
    then = SDL_GetTicks();
    DrawPict(screen, argv[1], speedy, flip, nofade);
    now = SDL_GetTicks();
    printf("Time: %d milliseconds\n", now - then);
#else
    DrawPict(screen, argv[1], speedy, flip, nofade);
#endif
    SDL_Delay(delay * 1000);
    SDL_Quit();
    return (0);
}