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_BenJi
Joined: 16 Jan 2008
Posts: 7
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 Posted: Fri Feb 29, 2008 3:58 am Post subject: [SOLVED] RGB to u32 Color |
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Hi,
Yeah, I'm noob, but I don't know how to convert an RGB colour to an u32 colour.
I get the framebuffer with 'sceDisplayGetFrameBuf', and I want to change the colour of some pixels.
With SDL there is the function 'SDL_MapRGBA' but I don't want to use SDL. And there isn't the 'uint32_pack' for the PSP (or I didn't find it)
Can someone help me ? :(
Solution :
| Code: | | color = (b<<16) + (g<<8) + r; |
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CpuWhiz
Joined: 04 Jun 2007
Posts: 42
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| Posted: Fri Feb 29, 2008 2:34 pm Post subject: |
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They are in pspgu.h:
| Code: | /* Color Macros, maps 8 bit unsigned channels into one 32-bit value */
#define GU_ABGR(a,b,g,r) (((a) << 24)|((b) << 16)|((g) << 8)|(r))
#define GU_ARGB(a,r,g,b) GU_ABGR((a),(b),(g),(r))
#define GU_RGBA(r,g,b,a) GU_ARGB((a),(r),(g),(b))
/* Color Macro, maps floating point channels (0..1) into one 32-bit value */
#define GU_COLOR(r,g,b,a) GU_RGBA((u32)((r) * 255.0f),(u32)((g) * 255.0f),(u32)((b) * 255.0f),(u32)((a) * 255.0f)) |
So:
| Code: | | color = GU_RGBA(r, g, b, 255); |
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