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swrast: Add support for glReadPixels() to integer types.

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With this change, i965 passes
GL_EXT_texture_integer/fbo_integer_precision_clear

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Eric Anholt 2011-11-03 17:27:23 -07:00
parent e34c9edcda
commit 11a90af1ef
1 changed files with 13 additions and 6 deletions
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19
src/mesa/swrast/s_readpix.c
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@ -236,7 +236,10 @@ slow_read_rgba_pixels( struct gl_context *ctx,
GLbitfield transferOps )
{
struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
GLfloat rgba[MAX_WIDTH][4];
union {
float f[MAX_WIDTH][4];
unsigned int i[MAX_WIDTH][4];
} rgba;
GLubyte *dst, *map;
int dstStride, stride, j;
@ -248,11 +251,15 @@ slow_read_rgba_pixels( struct gl_context *ctx,
&map, &stride);
for (j = 0; j < height; j++) {
_mesa_unpack_rgba_row(_mesa_get_srgb_format_linear(rb->Format),
width, map, rgba);
_mesa_pack_rgba_span_float(ctx, width, rgba, format, type, dst,
packing, transferOps);
if (_mesa_is_integer_format(format)) {
_mesa_unpack_int_rgba_row(rb->Format, width, map, rgba.i);
_mesa_pack_rgba_span_int(ctx, width, rgba.i, format, type, dst);
} else {
_mesa_unpack_rgba_row(_mesa_get_srgb_format_linear(rb->Format),
width, map, rgba.f);
_mesa_pack_rgba_span_float(ctx, width, rgba.f, format, type, dst,
packing, transferOps);
}
dst += dstStride;
map += stride;
}