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mesa ReadPixels: handle signed/unsigned integer clamping

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Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Jordan Justen 2012-06-25 14:14:25 -07:00
parent f7333b6345
commit 6671d0dad3
1 changed files with 10 additions and 3 deletions
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13
src/mesa/main/readpix.c
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@ -322,6 +322,8 @@ slow_read_rgba_pixels( struct gl_context *ctx,
void *rgba;
GLubyte *dst, *map;
int dstStride, stride, j;
GLboolean dst_is_integer = _mesa_is_enum_format_integer(format);
GLboolean dst_is_uint = _mesa_is_format_unsigned(rbFormat);
dstStride = _mesa_image_row_stride(packing, width, format, type);
dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
@ -339,12 +341,17 @@ slow_read_rgba_pixels( struct gl_context *ctx,
goto done;
for (j = 0; j < height; j++) {
if (_mesa_is_enum_format_integer(format)) {
if (dst_is_integer) {
_mesa_unpack_uint_rgba_row(rbFormat, width, map, (GLuint (*)[4]) rgba);
_mesa_rebase_rgba_uint(width, (GLuint (*)[4]) rgba,
rb->_BaseFormat);
_mesa_pack_rgba_span_from_uints(ctx, width, (GLuint (*)[4]) rgba, format,
type, dst);
if (dst_is_uint) {
_mesa_pack_rgba_span_from_uints(ctx, width, (GLuint (*)[4]) rgba, format,
type, dst);
} else {
_mesa_pack_rgba_span_from_ints(ctx, width, (GLint (*)[4]) rgba, format,
type, dst);
}
} else {
_mesa_unpack_rgba_row(rbFormat, width, map, (GLfloat (*)[4]) rgba);
_mesa_rebase_rgba_float(width, (GLfloat (*)[4]) rgba,