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ALLEGRO_PROGRAMMABLE_PIPELINE Question |
tinyBigGAMES
Member #17,458
February 2020
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So, I'm trying to fully understand this. I finally figure out how to get shaders working under DirectX with the ALLEGRO_PROGRAMMABLE_PIPELINE flag. This is what I'm currently using: ALLEGRO_DIRECT3D | ALLEGRO_RESIZABLE | ALLEGRO_PROGRAMMABLE_PIPELINE I can enable compile and use shaders with DirectX. So now I'm working on my next example where I have a white bitmap, and I color then at runtime using a random color. But now, they are all just white. If I remove ALLEGRO_PROGRAMMABLE_PIPELINE, then they color as expected. Now I read in the docs that Allegro drawing routines don't work when ALLEGRO_PROGRAMMABLE_PIPELINE is enabled? What does this mean, I can draw the sprites, fonts, etc., just cannot seem to apply color. So in this case, how would I go about drawing this white bitmap with different colors at runtime when ALLEGRO_PROGRAMMABLE_PIPELINE is enabled? Do I really have to make a shader just for this? I'm new to shaders, thoughts, ideas? Much appreciated. Jarrod Davis |
check_switch_26
Member #20,652
July 2021
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Have you looked at shader_source.inc in the Allegro src directory? [1] This is the default shader that is used with ALLEGRO_PROGRAMMABLE_PIPELINE enabled. Also see the notes for al_get_default_shader_source() where it describes the uniforms that are passed to the shader when using ALLEGRO_PROGRAMMABLE_PIPELINE. [2] I'm not sure where the documentation gave you the impression that drawing routines don't work with ALLEGRO_PROGRAMMABLE_PIPELINE. That is incorrect. |
tinyBigGAMES
Member #17,458
February 2020
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Thanks Jarrod Davis |
Edgar Reynaldo
Major Reynaldo
May 2007
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Can someone write a wiki artical on using shaders and ALLEGRO_PROGRAMMABLE_PIPELINE? That would be really helpful. My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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