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comparison src/video/SDL_video.c @ 1969:5d3724f64f2b

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Clarified the difference between render drivers and render contexts
author Sam Lantinga <slouken@libsdl.org>
date Sun, 06 Aug 2006 00:09:04 +0000
parents 01e29c3e9a29
children db3ba6c0d0df
comparison
equal deleted inserted replaced
1968:9f589a1f74a5 1969:5d3724f64f2b
1360 display->num_render_drivers++; 1360 display->num_render_drivers++;
1361 } 1361 }
1362 } 1362 }
1363 1363
1364 int 1364 int
1365 SDL_GetNumRenderers(void) 1365 SDL_GetNumRenderDrivers(void)
1366 { 1366 {
1367 if (_this) { 1367 if (_this) {
1368 return SDL_CurrentDisplay.num_render_drivers; 1368 return SDL_CurrentDisplay.num_render_drivers;
1369 } 1369 }
1370 return 0; 1370 return 0;
1371 } 1371 }
1372 1372
1373 int 1373 int
1374 SDL_GetRendererInfo(int index, SDL_RendererInfo * info) 1374 SDL_GetRenderDriverInfo(int index, SDL_RendererInfo * info)
1375 { 1375 {
1376 if (!_this) { 1376 if (!_this) {
1377 SDL_UninitializedVideo(); 1377 SDL_UninitializedVideo();
1378 return -1; 1378 return -1;
1379 } 1379 }
1380 1380
1381 if (index >= SDL_GetNumRenderers()) { 1381 if (index < 0 || index >= SDL_GetNumRenderDrivers()) {
1382 SDL_SetError("index must be in the range of 0 - %d", 1382 SDL_SetError("index must be in the range of 0 - %d",
1383 SDL_GetNumRenderers() - 1); 1383 SDL_GetNumRenderDrivers() - 1);
1384 return -1; 1384 return -1;
1385 } 1385 }
1386 if (index < 0) { 1386 *info = SDL_CurrentDisplay.render_drivers[index].info;
1387 if (!SDL_CurrentDisplay.current_renderer) {
1388 SDL_SetError("There is no current renderer");
1389 return -1;
1390 }
1391 *info = SDL_CurrentDisplay.current_renderer->info;
1392 } else {
1393 *info = SDL_CurrentDisplay.render_drivers[index].info;
1394 }
1395 return 0; 1387 return 0;
1396 } 1388 }
1397 1389
1398 int 1390 int
1399 SDL_CreateRenderer(SDL_WindowID windowID, int index, Uint32 flags) 1391 SDL_CreateRenderer(SDL_WindowID windowID, int index, Uint32 flags)
1404 return 0; 1396 return 0;
1405 } 1397 }
1406 1398
1407 if (index < 0) { 1399 if (index < 0) {
1408 const char *override = SDL_getenv("SDL_VIDEO_RENDERER"); 1400 const char *override = SDL_getenv("SDL_VIDEO_RENDERER");
1409 int n = SDL_GetNumRenderers(); 1401 int n = SDL_GetNumRenderDrivers();
1410 for (index = 0; index < n; ++index) { 1402 for (index = 0; index < n; ++index) {
1411 SDL_RenderDriver *driver = 1403 SDL_RenderDriver *driver =
1412 &SDL_CurrentDisplay.render_drivers[index]; 1404 &SDL_CurrentDisplay.render_drivers[index];
1413 1405
1414 if (override) { 1406 if (override) {
1425 SDL_SetError("Couldn't find matching render driver"); 1417 SDL_SetError("Couldn't find matching render driver");
1426 return -1; 1418 return -1;
1427 } 1419 }
1428 } 1420 }
1429 1421
1430 if (index >= SDL_GetNumRenderers()) { 1422 if (index >= SDL_GetNumRenderDrivers()) {
1431 SDL_SetError("index must be -1 or in the range of 0 - %d", 1423 SDL_SetError("index must be -1 or in the range of 0 - %d",
1432 SDL_GetNumRenderers() - 1); 1424 SDL_GetNumRenderDrivers() - 1);
1433 return -1; 1425 return -1;
1434 } 1426 }
1435 1427
1436 /* Free any existing renderer */ 1428 /* Free any existing renderer */
1437 SDL_DestroyRenderer(windowID); 1429 SDL_DestroyRenderer(windowID);
1459 if (renderer->ActivateRenderer(renderer) < 0) { 1451 if (renderer->ActivateRenderer(renderer) < 0) {
1460 return -1; 1452 return -1;
1461 } 1453 }
1462 } 1454 }
1463 SDL_CurrentDisplay.current_renderer = renderer; 1455 SDL_CurrentDisplay.current_renderer = renderer;
1456 return 0;
1457 }
1458
1459 int
1460 SDL_GetRendererInfo(SDL_RendererInfo * info)
1461 {
1462 if (!_this) {
1463 SDL_UninitializedVideo();
1464 return -1;
1465 }
1466
1467 if (!SDL_CurrentDisplay.current_renderer) {
1468 SDL_SetError("There is no current renderer");
1469 return -1;
1470 }
1471 *info = SDL_CurrentDisplay.current_renderer->info;
1464 return 0; 1472 return 0;
1465 } 1473 }
1466 1474
1467 SDL_TextureID 1475 SDL_TextureID
1468 SDL_CreateTexture(Uint32 format, int access, int w, int h) 1476 SDL_CreateTexture(Uint32 format, int access, int w, int h)