Mercurial > sdl-ios-xcode
view test/testvidinfo.c @ 1555:780fd5b61df1
Fixed bug #89
Date: Sun, 23 Oct 2005 16:39:03 +0200
From: "A. Schmid" <sahib@phreaker.net>
Subject: [SDL] no software surfaces with svgalib driver?
Hi,
I noticed that the SDL (1.2.9) svgalib driver only makes use of linear
addressable (framebuffer) video modes. On older systems (like one of
mine), linear addressable modes are often not available.
Especially for cards with VESA VBE < 2.0 the svgalib vesa driver is
unusable, since VESA only supports framebuffering for VBE 2.0 and later.
The changes necessary to add support for software surfaces seem to be
relatively small. I only had to hack src/video/svga/SDL_svgavideo.c (see
attached patch). The code worked fine for me, but it is no more than a
proof of concept and should be reviewed (probably has a memory leak when
switching modes). It also uses the vgagl library (included in the
svgalib package) and needs to be linked against it.
-Alex
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 19 Mar 2006 12:05:16 +0000 |
parents | 8d9bb0cf2c2a |
children | 8b9d79e7eacf c121d94672cb |
line wrap: on
line source
/* Simple program -- figure out what kind of video display we have */ #include <stdlib.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "SDL.h" #define NUM_BLITS 10 #define NUM_UPDATES 500 #define FLAG_MASK (SDL_HWSURFACE | SDL_FULLSCREEN | SDL_DOUBLEBUF | \ SDL_SRCCOLORKEY | SDL_SRCALPHA | SDL_RLEACCEL | \ SDL_RLEACCELOK) void PrintFlags(Uint32 flags) { printf("0x%8.8x", (flags & FLAG_MASK)); if ( flags & SDL_HWSURFACE ) { printf(" SDL_HWSURFACE"); } else { printf(" SDL_SWSURFACE"); } if ( flags & SDL_FULLSCREEN ) { printf(" | SDL_FULLSCREEN"); } if ( flags & SDL_DOUBLEBUF ) { printf(" | SDL_DOUBLEBUF"); } if ( flags & SDL_SRCCOLORKEY ) { printf(" | SDL_SRCCOLORKEY"); } if ( flags & SDL_SRCALPHA ) { printf(" | SDL_SRCALPHA"); } if ( flags & SDL_RLEACCEL ) { printf(" | SDL_RLEACCEL"); } if ( flags & SDL_RLEACCELOK ) { printf(" | SDL_RLEACCELOK"); } } int RunBlitTests(SDL_Surface *screen, SDL_Surface *bmp, int blitcount) { int i, j; int maxx; int maxy; SDL_Rect dst; maxx = (int)screen->w - bmp->w + 1; maxy = (int)screen->h - bmp->h + 1; for ( i = 0; i < NUM_UPDATES; ++i ) { for ( j = 0; j < blitcount; ++j ) { if ( maxx ) { dst.x = rand() % maxx; } else { dst.x = 0; } if ( maxy ) { dst.y = rand() % maxy; } else { dst.y = 0; } dst.w = bmp->w; dst.h = bmp->h; SDL_BlitSurface(bmp, NULL, screen, &dst); } SDL_Flip(screen); } return i; } int RunModeTests(SDL_Surface *screen) { Uint32 then, now; Uint32 frames; float seconds; int i; Uint8 r, g, b; SDL_Surface *bmp, *bmpcc, *tmp; SDL_Event event; while ( SDL_PollEvent(&event) ) { if ( event.type == SDL_KEYDOWN ) return 0; } /* First test fills and screen update speed */ printf("Running color fill and fullscreen update test\n"); then = SDL_GetTicks(); frames = 0; for ( i = 0; i < 256; ++i ) { r = i; g = 0; b = 0; SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, r, g, b)); SDL_Flip(screen); ++frames; } for ( i = 0; i < 256; ++i ) { r = 0; g = i; b = 0; SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, r, g, b)); SDL_Flip(screen); ++frames; } for ( i = 0; i < 256; ++i ) { r = 0; g = 0; b = i; SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, r, g, b)); SDL_Flip(screen); ++frames; } now = SDL_GetTicks(); seconds = (float)(now - then) / 1000.0f; if ( seconds > 0.0f ) { printf("%d fills and flips in %2.2f seconds, %2.2f FPS\n", frames, seconds, (float)frames / seconds); } else { printf("%d fills and flips in zero seconds!n", frames); } /* clear the screen after fill test */ SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0)); SDL_Flip(screen); while ( SDL_PollEvent(&event) ) { if ( event.type == SDL_KEYDOWN ) return 0; } /* run the generic blit test */ bmp = SDL_LoadBMP("sample.bmp"); if ( ! bmp ) { printf("Couldn't load sample.bmp: %s\n", SDL_GetError()); return 0; } printf("Running freshly loaded blit test: %dx%d at %d bpp, flags: ", bmp->w, bmp->h, bmp->format->BitsPerPixel); PrintFlags(bmp->flags); printf("\n"); then = SDL_GetTicks(); frames = RunBlitTests(screen, bmp, NUM_BLITS); now = SDL_GetTicks(); seconds = (float)(now - then) / 1000.0f; if ( seconds > 0.0f ) { printf("%d blits / %d updates in %2.2f seconds, %2.2f FPS\n", NUM_BLITS*frames, frames, seconds, (float)frames / seconds); } else { printf("%d blits / %d updates in zero seconds!\n", NUM_BLITS*frames, frames); } /* clear the screen after blit test */ SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0)); SDL_Flip(screen); while ( SDL_PollEvent(&event) ) { if ( event.type == SDL_KEYDOWN ) return 0; } /* run the colorkeyed blit test */ bmpcc = SDL_LoadBMP("sample.bmp"); if ( ! bmpcc ) { printf("Couldn't load sample.bmp: %s\n", SDL_GetError()); return 0; } printf("Running freshly loaded cc blit test: %dx%d at %d bpp, flags: ", bmpcc->w, bmpcc->h, bmpcc->format->BitsPerPixel); SDL_SetColorKey(bmpcc, SDL_SRCCOLORKEY | SDL_RLEACCEL, *(Uint8 *)bmpcc->pixels); PrintFlags(bmpcc->flags); printf("\n"); then = SDL_GetTicks(); frames = RunBlitTests(screen, bmpcc, NUM_BLITS); now = SDL_GetTicks(); seconds = (float)(now - then) / 1000.0f; if ( seconds > 0.0f ) { printf("%d cc blits / %d updates in %2.2f seconds, %2.2f FPS\n", NUM_BLITS*frames, frames, seconds, (float)frames / seconds); } else { printf("%d cc blits / %d updates in zero seconds!\n", NUM_BLITS*frames, frames); } /* clear the screen after cc blit test */ SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0)); SDL_Flip(screen); while ( SDL_PollEvent(&event) ) { if ( event.type == SDL_KEYDOWN ) return 0; } /* run the generic blit test */ tmp = bmp; bmp = SDL_DisplayFormat(bmp); SDL_FreeSurface(tmp); if ( ! bmp ) { printf("Couldn't convert sample.bmp: %s\n", SDL_GetError()); return 0; } printf("Running display format blit test: %dx%d at %d bpp, flags: ", bmp->w, bmp->h, bmp->format->BitsPerPixel); PrintFlags(bmp->flags); printf("\n"); then = SDL_GetTicks(); frames = RunBlitTests(screen, bmp, NUM_BLITS); now = SDL_GetTicks(); seconds = (float)(now - then) / 1000.0f; if ( seconds > 0.0f ) { printf("%d blits / %d updates in %2.2f seconds, %2.2f FPS\n", NUM_BLITS*frames, frames, seconds, (float)frames / seconds); } else { printf("%d blits / %d updates in zero seconds!\n", NUM_BLITS*frames, frames); } /* clear the screen after blit test */ SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0)); SDL_Flip(screen); while ( SDL_PollEvent(&event) ) { if ( event.type == SDL_KEYDOWN ) return 0; } /* run the colorkeyed blit test */ tmp = bmpcc; bmpcc = SDL_DisplayFormat(bmpcc); SDL_FreeSurface(tmp); if ( ! bmpcc ) { printf("Couldn't convert sample.bmp: %s\n", SDL_GetError()); return 0; } printf("Running display format cc blit test: %dx%d at %d bpp, flags: ", bmpcc->w, bmpcc->h, bmpcc->format->BitsPerPixel); PrintFlags(bmpcc->flags); printf("\n"); then = SDL_GetTicks(); frames = RunBlitTests(screen, bmpcc, NUM_BLITS); now = SDL_GetTicks(); seconds = (float)(now - then) / 1000.0f; if ( seconds > 0.0f ) { printf("%d cc blits / %d updates in %2.2f seconds, %2.2f FPS\n", NUM_BLITS*frames, frames, seconds, (float)frames / seconds); } else { printf("%d cc blits / %d updates in zero seconds!\n", NUM_BLITS*frames, frames); } /* clear the screen after cc blit test */ SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0)); SDL_Flip(screen); while ( SDL_PollEvent(&event) ) { if ( event.type == SDL_KEYDOWN ) return 0; } /* run the alpha blit test only if screen bpp>8 */ if (bmp->format->BitsPerPixel>8) { SDL_FreeSurface(bmp); bmp = SDL_LoadBMP("sample.bmp"); SDL_SetAlpha(bmp, SDL_SRCALPHA, 85); /* 85 - 33% alpha */ tmp = bmp; bmp = SDL_DisplayFormat(bmp); SDL_FreeSurface(tmp); if ( ! bmp ) { printf("Couldn't convert sample.bmp: %s\n", SDL_GetError()); return 0; } printf("Running display format alpha blit test: %dx%d at %d bpp, flags: ", bmp->w, bmp->h, bmp->format->BitsPerPixel); PrintFlags(bmp->flags); printf("\n"); then = SDL_GetTicks(); frames = RunBlitTests(screen, bmp, NUM_BLITS); now = SDL_GetTicks(); seconds = (float)(now - then) / 1000.0f; if ( seconds > 0.0f ) { printf("%d alpha blits / %d updates in %2.2f seconds, %2.2f FPS\n", NUM_BLITS*frames, frames, seconds, (float)frames / seconds); } else { printf("%d alpha blits / %d updates in zero seconds!\n", NUM_BLITS*frames, frames); } } /* clear the screen after alpha blit test */ SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0)); SDL_Flip(screen); while ( SDL_PollEvent(&event) ) { if ( event.type == SDL_KEYDOWN ) return 0; } /* run the cc+alpha blit test only if screen bpp>8 */ if (bmp->format->BitsPerPixel>8) { SDL_FreeSurface(bmpcc); bmpcc = SDL_LoadBMP("sample.bmp"); SDL_SetAlpha(bmpcc, SDL_SRCALPHA, 85); /* 85 - 33% alpha */ SDL_SetColorKey(bmpcc, SDL_SRCCOLORKEY | SDL_RLEACCEL, *(Uint8 *)bmpcc->pixels); tmp = bmpcc; bmpcc = SDL_DisplayFormat(bmpcc); SDL_FreeSurface(tmp); if ( ! bmpcc ) { printf("Couldn't convert sample.bmp: %s\n", SDL_GetError()); return 0; } printf("Running display format cc+alpha blit test: %dx%d at %d bpp, flags: ", bmpcc->w, bmpcc->h, bmpcc->format->BitsPerPixel); PrintFlags(bmpcc->flags); printf("\n"); then = SDL_GetTicks(); frames = RunBlitTests(screen, bmpcc, NUM_BLITS); now = SDL_GetTicks(); seconds = (float)(now - then) / 1000.0f; if ( seconds > 0.0f ) { printf("%d cc+alpha blits / %d updates in %2.2f seconds, %2.2f FPS\n", NUM_BLITS*frames, frames, seconds, (float)frames / seconds); } else { printf("%d cc+alpha blits / %d updates in zero seconds!\n", NUM_BLITS*frames, frames); } } SDL_FreeSurface(bmpcc); SDL_FreeSurface(bmp); while ( SDL_PollEvent(&event) ) { if ( event.type == SDL_KEYDOWN ) return 0; } return 1; } void RunVideoTests() { static const struct { int w, h, bpp; } mode_list[] = { { 640, 480, 8 }, { 640, 480, 16 }, { 640, 480, 32 }, { 800, 600, 8 }, { 800, 600, 16 }, { 800, 600, 32 }, { 1024, 768, 8 }, { 1024, 768, 16 }, { 1024, 768, 32 } }; static const Uint32 flags[] = { (SDL_SWSURFACE), (SDL_SWSURFACE | SDL_FULLSCREEN), (SDL_HWSURFACE | SDL_FULLSCREEN), (SDL_HWSURFACE | SDL_FULLSCREEN | SDL_DOUBLEBUF) }; int i, j; SDL_Surface *screen; /* Test out several different video mode combinations */ SDL_WM_SetCaption("SDL Video Benchmark", "vidtest"); SDL_ShowCursor(0); for ( i = 0; i < SDL_TABLESIZE(mode_list); ++i ) { for ( j = 0; j < SDL_TABLESIZE(flags); ++j ) { printf("===================================\n"); printf("Setting video mode: %dx%d at %d bpp, flags: ", mode_list[i].w, mode_list[i].h, mode_list[i].bpp); PrintFlags(flags[j]); printf("\n"); screen = SDL_SetVideoMode(mode_list[i].w, mode_list[i].h, mode_list[i].bpp, flags[j]); if ( ! screen ) { printf("Setting video mode failed: %s\n", SDL_GetError()); continue; } if ( (screen->flags & FLAG_MASK) != flags[j] ) { printf("Flags didn't match: "); PrintFlags(screen->flags); printf("\n"); continue; } if ( ! RunModeTests(screen) ) { return; } } } } int main(int argc, char *argv[]) { const SDL_VideoInfo *info; int i; SDL_Rect **modes; char driver[128]; if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); exit(1); } if ( SDL_VideoDriverName(driver, sizeof(driver)) ) { printf("Video driver: %s\n", driver); } info = SDL_GetVideoInfo(); printf( "Current display: %dx%d, %d bits-per-pixel\n", info->current_w, info->current_h, info->vfmt->BitsPerPixel); if ( info->vfmt->palette == NULL ) { printf(" Red Mask = 0x%.8x\n", info->vfmt->Rmask); printf(" Green Mask = 0x%.8x\n", info->vfmt->Gmask); printf(" Blue Mask = 0x%.8x\n", info->vfmt->Bmask); } /* Print available fullscreen video modes */ modes = SDL_ListModes(NULL, SDL_FULLSCREEN); if ( modes == (SDL_Rect **)0 ) { printf("No available fullscreen video modes\n"); } else if ( modes == (SDL_Rect **)-1 ) { printf("No special fullscreen video modes\n"); } else { printf("Fullscreen video modes:\n"); for ( i=0; modes[i]; ++i ) { printf("\t%dx%dx%d\n", modes[i]->w, modes[i]->h, info->vfmt->BitsPerPixel); } } if ( info->wm_available ) { printf("A window manager is available\n"); } if ( info->hw_available ) { printf("Hardware surfaces are available (%dK video memory)\n", info->video_mem); } if ( info->blit_hw ) { printf( "Copy blits between hardware surfaces are accelerated\n"); } if ( info->blit_hw_CC ) { printf( "Colorkey blits between hardware surfaces are accelerated\n"); } if ( info->blit_hw_A ) { printf( "Alpha blits between hardware surfaces are accelerated\n"); } if ( info->blit_sw ) { printf( "Copy blits from software surfaces to hardware surfaces are accelerated\n"); } if ( info->blit_sw_CC ) { printf( "Colorkey blits from software surfaces to hardware surfaces are accelerated\n"); } if ( info->blit_sw_A ) { printf( "Alpha blits from software surfaces to hardware surfaces are accelerated\n"); } if ( info->blit_fill ) { printf( "Color fills on hardware surfaces are accelerated\n"); } if ( argv[1] && (strcmp(argv[1], "-benchmark") == 0) ) { RunVideoTests(); } SDL_Quit(); return(0); }