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added optimized GL_RGB, GL_UNSIGNED_BYTE case to gl_pack_rgba_span)

This commit is contained in:
Brian Paul 1999-10-22 10:59:15 +00:00
parent e261963104
commit 3428162e27
1 changed files with 14 additions and 2 deletions
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16
src/mesa/main/image.c
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@ -1,4 +1,4 @@
/* $Id: image.c,v 1.7 1999/10/19 20:31:08 brianp Exp $ */
/* $Id: image.c,v 1.8 1999/10/22 10:59:15 brianp Exp $ */
/*
* Mesa 3-D graphics library
@ -1683,9 +1683,21 @@ void gl_pack_rgba_span( const GLcontext *ctx,
/* Test for optimized case first */
if (!ctx->Pixel.ScaleOrBiasRGBA && !ctx->Pixel.MapColorFlag &&
format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
/* simple case */
/* common simple case */
MEMCPY( destination, rgba, n * 4 * sizeof(GLubyte) );
}
else if (!ctx->Pixel.ScaleOrBiasRGBA && !ctx->Pixel.MapColorFlag &&
format == GL_RGB && type == GL_UNSIGNED_BYTE) {
/* common simple case */
GLint i;
GLubyte *dest = (GLubyte *) destination;
for (i = 0; i < n; i++) {
dest[i+0] = rgba[i][RCOMP];
dest[i+1] = rgba[i][GCOMP];
dest[i+2] = rgba[i][BCOMP];
dest += 3;
}
}
else {
GLfloat red[MAX_WIDTH], green[MAX_WIDTH], blue[MAX_WIDTH];
GLfloat alpha[MAX_WIDTH], luminance[MAX_WIDTH];