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comparison src/video/SDL_renderer_sw.c @ 3435:9f62f47d989b

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You can specify the format for pixel data in SDL_RenderReadPixels() and SDL_RenderWritePixels() This code still doesn't quite work yet. :)
author Sam Lantinga <slouken@libsdl.org>
date Mon, 16 Nov 2009 07:13:07 +0000
parents 36cf454ba065
children 0267b8b1595c
comparison
equal deleted inserted replaced
3434:147d6ef5be03 3435:9f62f47d989b
64 int y2); 64 int y2);
65 static int SW_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect); 65 static int SW_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect);
66 static int SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture, 66 static int SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
67 const SDL_Rect * srcrect, const SDL_Rect * dstrect); 67 const SDL_Rect * srcrect, const SDL_Rect * dstrect);
68 static int SW_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, 68 static int SW_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
69 void * pixels, int pitch); 69 Uint32 format, void * pixels, int pitch);
70 static int SW_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect, 70 static int SW_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
71 const void * pixels, int pitch); 71 Uint32 format, const void * pixels, int pitch);
72 static void SW_RenderPresent(SDL_Renderer * renderer); 72 static void SW_RenderPresent(SDL_Renderer * renderer);
73 static void SW_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture); 73 static void SW_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture);
74 static void SW_DestroyRenderer(SDL_Renderer * renderer); 74 static void SW_DestroyRenderer(SDL_Renderer * renderer);
75 75
76 76
734 return status; 734 return status;
735 } 735 }
736 736
737 static int 737 static int
738 SW_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, 738 SW_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
739 void * pixels, int pitch) 739 Uint32 format, void * pixels, int pitch)
740 { 740 {
741 SW_RenderData *data = (SW_RenderData *) renderer->driverdata; 741 SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
742 const Uint8 *src;
743 Uint8 *dst;
744 int src_pitch, dst_pitch, w, h;
745 742
746 if (data->renderer->LockTexture(data->renderer, 743 if (data->renderer->LockTexture(data->renderer,
747 data->texture[data->current_texture], 744 data->texture[data->current_texture],
748 rect, 0, &data->surface.pixels, 745 rect, 0, &data->surface.pixels,
749 &data->surface.pitch) < 0) { 746 &data->surface.pitch) < 0) {
750 return -1; 747 return -1;
751 } 748 }
752 749
753 src = data->surface.pixels; 750 SDL_ConvertPixels(rect->w, rect->h,
754 src_pitch = data->surface.pitch; 751 data->format, data->surface.pixels, data->surface.pitch,
755 dst = pixels; 752 format, pixels, pitch);
756 dst_pitch = pitch;
757 h = rect->h;
758 w = rect->w * data->surface.format->BytesPerPixel;
759 while (h--) {
760 SDL_memcpy(dst, src, w);
761 src += src_pitch;
762 dst += dst_pitch;
763 }
764 753
765 data->renderer->UnlockTexture(data->renderer, 754 data->renderer->UnlockTexture(data->renderer,
766 data->texture[data->current_texture]); 755 data->texture[data->current_texture]);
767 return 0; 756 return 0;
768 } 757 }
769 758
770 static int 759 static int
771 SW_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect, 760 SW_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
772 const void * pixels, int pitch) 761 Uint32 format, const void * pixels, int pitch)
773 { 762 {
774 SW_RenderData *data = (SW_RenderData *) renderer->driverdata; 763 SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
775 const Uint8 *src;
776 Uint8 *dst;
777 int src_pitch, dst_pitch, w, h;
778 764
779 if (data->renderer->info.flags & SDL_RENDERER_PRESENTCOPY) { 765 if (data->renderer->info.flags & SDL_RENDERER_PRESENTCOPY) {
780 SDL_AddDirtyRect(&data->dirty, rect); 766 SDL_AddDirtyRect(&data->dirty, rect);
781 } 767 }
782 768
785 rect, 1, &data->surface.pixels, 771 rect, 1, &data->surface.pixels,
786 &data->surface.pitch) < 0) { 772 &data->surface.pitch) < 0) {
787 return -1; 773 return -1;
788 } 774 }
789 775
790 src = pixels; 776 SDL_ConvertPixels(rect->w, rect->h, format, pixels, pitch,
791 src_pitch = pitch; 777 data->format, data->surface.pixels, data->surface.pitch);
792 dst = data->surface.pixels;
793 dst_pitch = data->surface.pitch;
794 h = rect->h;
795 w = rect->w * data->surface.format->BytesPerPixel;
796 while (h--) {
797 SDL_memcpy(dst, src, w);
798 src += src_pitch;
799 dst += dst_pitch;
800 }
801 778
802 data->renderer->UnlockTexture(data->renderer, 779 data->renderer->UnlockTexture(data->renderer,
803 data->texture[data->current_texture]); 780 data->texture[data->current_texture]);
804 return 0; 781 return 0;
805 } 782 }