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authorMathias Fröhlich <Mathias.Froehlich@gmx.net>2010-11-22 23:19:52 +0100
committerMarek Olšák <maraeo@gmail.com>2010-11-22 23:56:41 +0100
commit8d1ad3b21cedabb820bdc92b9395c98503e70f7b (patch)
tree6df1d458b2e1c6eca7fcebf55f67d257613c198b /src/gallium/drivers/r300
parent271b7b5914d4ec0ddb93b469f618c4b69c1e5e69 (diff)
r300g: Avoid returning values in a static array, fixing a potential race
(Marek: added the initializion of "vec" in the default statement) NOTE: This is a candidate for the 7.9 branch. Signed-off-by: Marek Olšák <maraeo@gmail.com>
Diffstat (limited to 'src/gallium/drivers/r300')
-rw-r--r--src/gallium/drivers/r300/r300_emit.c32
1 files changed, 21 insertions, 11 deletions
diff --git a/src/gallium/drivers/r300/r300_emit.c b/src/gallium/drivers/r300/r300_emit.c
index c187f115da..5b6f82cd89 100644
--- a/src/gallium/drivers/r300/r300_emit.c
+++ b/src/gallium/drivers/r300/r300_emit.c
@@ -83,16 +83,20 @@ void r300_emit_dsa_state(struct r300_context* r300, unsigned size, void* state)
}
}
-static const float * get_rc_constant_state(
+static void get_rc_constant_state(
+ float vec[4],
struct r300_context * r300,
struct rc_constant * constant)
{
struct r300_textures_state* texstate = r300->textures_state.state;
- static float vec[4] = { 0.0, 0.0, 0.0, 1.0 };
struct r300_texture *tex;
assert(constant->Type == RC_CONSTANT_STATE);
+ /* vec should either be (0, 0, 0, 1), which should be a relatively safe
+ * RGBA or STRQ value, or it could be one of the RC_CONSTANT_STATE
+ * state factors. */
+
switch (constant->u.State[0]) {
/* Factor for converting rectangle coords to
* normalized coords. Should only show up on non-r500. */
@@ -100,6 +104,8 @@ static const float * get_rc_constant_state(
tex = r300_texture(texstate->sampler_views[constant->u.State[1]]->base.texture);
vec[0] = 1.0 / tex->desc.width0;
vec[1] = 1.0 / tex->desc.height0;
+ vec[2] = 0;
+ vec[3] = 1;
break;
case RC_STATE_R300_TEXSCALE_FACTOR:
@@ -108,29 +114,31 @@ static const float * get_rc_constant_state(
vec[0] = tex->desc.b.b.width0 / (tex->desc.width0 + 0.001f);
vec[1] = tex->desc.b.b.height0 / (tex->desc.height0 + 0.001f);
vec[2] = tex->desc.b.b.depth0 / (tex->desc.depth0 + 0.001f);
+ vec[3] = 1;
break;
case RC_STATE_R300_VIEWPORT_SCALE:
vec[0] = r300->viewport.scale[0];
vec[1] = r300->viewport.scale[1];
vec[2] = r300->viewport.scale[2];
+ vec[3] = 1;
break;
case RC_STATE_R300_VIEWPORT_OFFSET:
vec[0] = r300->viewport.translate[0];
vec[1] = r300->viewport.translate[1];
vec[2] = r300->viewport.translate[2];
+ vec[3] = 1;
break;
default:
fprintf(stderr, "r300: Implementation error: "
"Unknown RC_CONSTANT type %d\n", constant->u.State[0]);
+ vec[0] = 0;
+ vec[1] = 0;
+ vec[2] = 0;
+ vec[3] = 1;
}
-
- /* This should either be (0, 0, 0, 1), which should be a relatively safe
- * RGBA or STRQ value, or it could be one of the RC_CONSTANT_STATE
- * state factors. */
- return vec;
}
/* Convert a normal single-precision float into the 7.16 format
@@ -220,8 +228,9 @@ void r300_emit_fs_rc_constant_state(struct r300_context* r300, unsigned size, vo
BEGIN_CS(size);
for(i = first; i < end; ++i) {
if (constants->Constants[i].Type == RC_CONSTANT_STATE) {
- const float *data =
- get_rc_constant_state(r300, &constants->Constants[i]);
+ float data[4];
+
+ get_rc_constant_state(data, r300, &constants->Constants[i]);
OUT_CS_REG_SEQ(R300_PFS_PARAM_0_X + i * 16, 4);
for (j = 0; j < 4; j++)
@@ -279,8 +288,9 @@ void r500_emit_fs_rc_constant_state(struct r300_context* r300, unsigned size, vo
BEGIN_CS(size);
for(i = first; i < end; ++i) {
if (constants->Constants[i].Type == RC_CONSTANT_STATE) {
- const float *data =
- get_rc_constant_state(r300, &constants->Constants[i]);
+ float data[4];
+
+ get_rc_constant_state(data, r300, &constants->Constants[i]);
OUT_CS_REG(R500_GA_US_VECTOR_INDEX,
R500_GA_US_VECTOR_INDEX_TYPE_CONST |