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added another fast-path in _mesa_unpack_ubyte_color_spa(), more comments

This commit is contained in:
Brian Paul 1999-11-03 18:24:05 +00:00
parent c3f0a511a7
commit b09a4cd913
1 changed files with 9 additions and 6 deletions
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15
src/mesa/main/image.c
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@ -1,4 +1,4 @@
/* $Id: image.c,v 1.11 1999/11/03 17:27:05 brianp Exp $ */ /* $Id: image.c,v 1.12 1999/11/03 18:24:05 brianp Exp $ */
/* /*
* Mesa 3-D graphics library * Mesa 3-D graphics library
@ -3247,7 +3247,6 @@ _mesa_unpack_ubyte_color_span( const GLcontext *ctx,
ASSERT(ctx->Visual->RGBAflag); ASSERT(ctx->Visual->RGBAflag);
applyTransferOps &= (ctx->Pixel.ScaleOrBiasRGBA || applyTransferOps &= (ctx->Pixel.ScaleOrBiasRGBA ||
ctx->Pixel.MapColorFlag ||
ctx->Pixel.MapColorFlag); ctx->Pixel.MapColorFlag);
/* Try simple cases first */ /* Try simple cases first */
@ -3291,8 +3290,10 @@ _mesa_unpack_ubyte_color_span( const GLcontext *ctx,
return; return;
} }
} }
else if (dstFormat == GL_ALPHA && srcFormat == GL_ALPHA) { else if (dstFormat == srcFormat) {
MEMCPY( dest, source, n * sizeof(GLubyte) ); GLint comps = gl_components_in_format(srcFormat);
assert(comps > 0);
MEMCPY( dest, source, n * comps * sizeof(GLubyte) );
return; return;
} }
} }
@ -3363,8 +3364,10 @@ _mesa_unpack_ubyte_color_span( const GLcontext *ctx,
/* /*
* XXX this is where more color table lookups, convolution and * XXX This is where more color table lookups, convolution,
* histogram would take place, if implemented. * histograms, minmax, color matrix, etc would take place if
* implemented.
* See figure 3.7 in the OpenGL 1.2 specification for more info.
*/ */