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swrast: Don't try to adjust_colors for <8bpc when handling R16, RG1616.

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The GL_RED and GL_RG were tricking this code into executing, but it's
totally unprepared for a 16-bit channel and just rescaled the values
down to 0.  We don't have anything with <8bit channels alongside >8bit
channels, so disabling it should be safe.

Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Eric Anholt 2011-04-15 19:55:38 -07:00
parent f0471d904c
commit 2b624634dd
1 changed files with 3 additions and 3 deletions
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6
src/mesa/swrast/s_readpix.c
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@ -344,9 +344,9 @@ read_rgba_pixels( struct gl_context *ctx,
_swrast_read_rgba_span(ctx, rb, width, x, y, GL_FLOAT, rgba);
/* apply fudge factor for shallow color buffers */
if (fb->Visual.redBits < 8 ||
fb->Visual.greenBits < 8 ||
fb->Visual.blueBits < 8) {
if ((fb->Visual.redBits < 8 && fb->Visual.redBits != 0) ||
(fb->Visual.greenBits < 8 && fb->Visual.greenBits != 0) ||
(fb->Visual.blueBits < 8 && fb->Visual.blueBits != 0)) {
adjust_colors(fb, width, rgba);
}