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comparison src/video/SDL_renderer_sw.c @ 2888:32e8bbba1e94

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Added stubs for software implementations of blending fills and line drawing
author Sam Lantinga <slouken@libsdl.org>
date Sat, 20 Dec 2008 13:14:28 +0000
parents 9dde605c7540
children 67f84eb26ea1
comparison
equal deleted inserted replaced
2887:f8c0c5ef6d54 2888:32e8bbba1e94
58 static int SW_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture, 58 static int SW_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
59 const SDL_Rect * rect, int markDirty, void **pixels, 59 const SDL_Rect * rect, int markDirty, void **pixels,
60 int *pitch); 60 int *pitch);
61 static void SW_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture); 61 static void SW_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
62 static int SW_SetDrawColor(SDL_Renderer * renderer); 62 static int SW_SetDrawColor(SDL_Renderer * renderer);
63 static int SW_SetDrawBlendMode(SDL_Renderer * renderer);
64 static int SW_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2,
65 int y2);
63 static int SW_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect); 66 static int SW_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect);
64 static int SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture, 67 static int SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
65 const SDL_Rect * srcrect, const SDL_Rect * dstrect); 68 const SDL_Rect * srcrect, const SDL_Rect * dstrect);
66 static void SW_RenderPresent(SDL_Renderer * renderer); 69 static void SW_RenderPresent(SDL_Renderer * renderer);
67 static void SW_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture); 70 static void SW_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture);
221 } 224 }
222 renderer->ActivateRenderer = SW_ActivateRenderer; 225 renderer->ActivateRenderer = SW_ActivateRenderer;
223 renderer->DisplayModeChanged = SW_DisplayModeChanged; 226 renderer->DisplayModeChanged = SW_DisplayModeChanged;
224 227
225 renderer->SetDrawColor = SW_SetDrawColor; 228 renderer->SetDrawColor = SW_SetDrawColor;
226 /* FIXME : Implement 229 renderer->SetDrawBlendMode = SW_SetDrawBlendMode;
227 renderer->SetDrawBlendMode = GL_SetDrawBlendMode; 230 renderer->RenderLine = SW_RenderLine;
228 renderer->RenderLine = GL_RenderLine;
229 */
230
231 renderer->RenderFill = SW_RenderFill; 231 renderer->RenderFill = SW_RenderFill;
232 renderer->RenderCopy = SW_RenderCopy; 232 renderer->RenderCopy = SW_RenderCopy;
233 renderer->RenderPresent = SW_RenderPresent; 233 renderer->RenderPresent = SW_RenderPresent;
234 renderer->DestroyRenderer = SW_DestroyRenderer; 234 renderer->DestroyRenderer = SW_DestroyRenderer;
235 renderer->info.name = SW_RenderDriver.info.name; 235 renderer->info.name = SW_RenderDriver.info.name;
530 { 530 {
531 return 0; 531 return 0;
532 } 532 }
533 533
534 static int 534 static int
535 SW_SetDrawBlendMode(SDL_Renderer * renderer)
536 {
537 return 0;
538 }
539
540 static int
541 SW_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2)
542 {
543 SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
544 int status;
545
546 if (data->renderer->info.flags & SDL_RENDERER_PRESENTCOPY) {
547 SDL_Rect rect;
548
549 if (x1 < x2) {
550 rect.x = x1;
551 rect.w = (x2 - x1) + 1;
552 } else {
553 rect.x = x2;
554 rect.w = (x1 - x2) + 1;
555 }
556 if (y1 < y2) {
557 rect.y = y1;
558 rect.h = (y2 - y1) + 1;
559 } else {
560 rect.y = y2;
561 rect.h = (y1 - y2) + 1;
562 }
563 SDL_AddDirtyRect(&data->dirty, &rect);
564 }
565
566 if (data->renderer->LockTexture(data->renderer,
567 data->texture[data->current_texture],
568 NULL, 1, &data->surface.pixels,
569 &data->surface.pitch) < 0) {
570 return -1;
571 }
572
573 if (renderer->blendMode == SDL_BLENDMODE_NONE) {
574 Uint32 color =
575 SDL_MapRGBA(data->surface.format, renderer->r, renderer->g,
576 renderer->b, renderer->a);
577
578 status = SDL_DrawLine(&data->surface, x1, y1, x2, y2, color);
579 } else {
580 status =
581 SDL_BlendLine(&data->surface, x1, y1, x2, y2, renderer->blendMode,
582 renderer->r, renderer->g, renderer->b, renderer->a);
583 }
584
585 data->renderer->UnlockTexture(data->renderer,
586 data->texture[data->current_texture]);
587 return status;
588 }
589
590 static int
535 SW_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect) 591 SW_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect)
536 { 592 {
537 SW_RenderData *data = (SW_RenderData *) renderer->driverdata; 593 SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
538 Uint32 color;
539 SDL_Rect real_rect; 594 SDL_Rect real_rect;
540 int status; 595 int status;
541 596
542 if (data->renderer->info.flags & SDL_RENDERER_PRESENTCOPY) { 597 if (data->renderer->info.flags & SDL_RENDERER_PRESENTCOPY) {
543 SDL_AddDirtyRect(&data->dirty, rect); 598 SDL_AddDirtyRect(&data->dirty, rect);
544 } 599 }
545
546 color = SDL_MapRGBA(data->surface.format,
547 renderer->r, renderer->g, renderer->b, renderer->a);
548 600
549 if (data->renderer->LockTexture(data->renderer, 601 if (data->renderer->LockTexture(data->renderer,
550 data->texture[data->current_texture], 602 data->texture[data->current_texture],
551 rect, 1, &data->surface.pixels, 603 rect, 1, &data->surface.pixels,
552 &data->surface.pitch) < 0) { 604 &data->surface.pitch) < 0) {
553 return -1; 605 return -1;
554 } 606 }
607
555 data->surface.w = rect->w; 608 data->surface.w = rect->w;
556 data->surface.h = rect->h; 609 data->surface.h = rect->h;
557 data->surface.clip_rect.w = rect->w; 610 data->surface.clip_rect.w = rect->w;
558 data->surface.clip_rect.h = rect->h; 611 data->surface.clip_rect.h = rect->h;
559 real_rect = data->surface.clip_rect; 612 real_rect = data->surface.clip_rect;
560 613
561 status = SDL_FillRect(&data->surface, &real_rect, color); 614 if (renderer->blendMode == SDL_BLENDMODE_NONE) {
615 Uint32 color =
616 SDL_MapRGBA(data->surface.format, renderer->r, renderer->g,
617 renderer->b, renderer->a);
618
619 status = SDL_FillRect(&data->surface, &real_rect, color);
620 } else {
621 status =
622 SDL_BlendRect(&data->surface, &real_rect, renderer->blendMode,
623 renderer->r, renderer->g, renderer->b, renderer->a);
624 }
562 625
563 data->renderer->UnlockTexture(data->renderer, 626 data->renderer->UnlockTexture(data->renderer,
564 data->texture[data->current_texture]); 627 data->texture[data->current_texture]);
565 return status; 628 return status;
566 } 629 }