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Loading a 32 bit bitmap

Posted on 2004-04-19
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Last Modified: 2013-12-26
Translation to 32 bit instead of 24 please:

Glu.gluBuild2DMipmaps(Gl.GL_TEXTURE_2D, 3,
NWidth, NHeight,
Gl.GL_BGR_EXT, Gl.GL_UNSIGNED_BYTE,
pViewOfFile1);
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Question by:rossryan
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void_main earned 500 total points
ID: 10897398
typedef struct pixel_32bit_s
{
   unsigned char r, g, b, alpha;
} pixel_32bit_t;

typedef struct pixel_24bit_s
{
   unsigned char r, g, b;
} pixel_24bit_t;

to convert it do the following:

for each pixel
{
   pixel32.r = pixel24.r;
   pixel32.g = pixel24.g;
   pixel32.b = pixel24.g;
   pixel32.alpha = 0;
}

thats it.
(to use 16 bit [obsolete] each r, g and b has 5 bits and there is a padding bit)

regards
void_main
0
 
LVL 4

Expert Comment

by:void_main
ID: 10915645
Small mistake:
it should be this

pixel32.b = pixel24.b;
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