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| Ho to use multi sampling ? |
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Soporythmique
Member #14,537
September 2012
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Hello, (Sorry for my bad english) I'm having trouble with the multi-sampling, I know that this function il enabled by default, but when I try this: 1al_set_new_display_option(ALLEGRO_SAMPLE_BUFFERS, 1, ALLEGRO_SUGGEST);
2 al_set_new_display_option(ALLEGRO_SAMPLES, 8, ALLEGRO_SUGGEST);
3 if (al_get_display_option(Affichage, ALLEGRO_SAMPLE_BUFFERS))
4 {
5 printf("With multisampling, level %i\n", al_get_display_option(Affichage, ALLEGRO_SAMPLES));
6 }
7 else
8 {
9 printf("Without multisampling.\n");
10 }
It return "Without multisampling" . . . 1al_set_target_bitmap(Buffer);
2 al_clear_to_color(al_map_rgb(0, 0, 0));
3al_draw_line(x1, y1, x2, y2, al_map_rgb(255, 120, 120), 0);
4 al_set_target_bitmap(al_get_backbuffer(Affichage));
5 al_draw_scaled_bitmap(Buffer, 0, 0, LargeurAffichage, HauteurAffichage, 0, 0, 1920, 1080, 0);
So I don't know where is the problem . . . Thanks for your help PS: My graphic crad is a 520M |
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Trent Gamblin
Member #261
April 2000
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1) I think you have to be drawing onto the display for multisampling to work (but I could be wrong!) 2) According to your code you're setting those display options (SAMPLE_BUFFERS, SAMPLES) after you already have a display. You have to set the before you create a display.
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Soporythmique
Member #14,537
September 2012
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Trent Gamblin said: According to your code you're setting those display options (SAMPLE_BUFFERS, SAMPLES) after you already have a display. You have to set the before you create a display. 2 Thank you it was just that, I thought it was activated by default. Just a last question, I didn't understound the utility of drawing on a bitmap for then draw this bitmap on the screen . . . it use twice more time no ? Currently I draw directly on the screen, and it work perfectly. |
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Elias
Member #358
May 2000
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Multisampling only works when drawing directly to the display. (We could add multisampling for offscreen targets if someone needs it and wants to implement it, for example by using this extension: http://www.khronos.org/registry/gles/extensions/EXT/EXT_multisampled_render_to_texture.txt Either just enabling it for all video bitmaps if the display has multi-sampling or adding a new bitmap flag would work API-wise I think.) -- |
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Trent Gamblin
Member #261
April 2000
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Enable it with a
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