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st/mesa: Use blend equation and function of first render target for all render targets if ARB_draw_buffers_blend is not supported

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If EXT_draw_buffers2 is supported but ARB_draw_buffers_blend isn't
_mesa_BlendFuncSeparateEXT only sets up the blend equation and function for the
first render target. This patch makes sure that update_blend doesn't try to use
the data from other rendertargets in such cases.

Signed-off-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Fabian Bieler 2011-02-10 16:45:41 +01:00 • committed by Brian Paul
parent a87730ff3f
commit a476ca1fd1
1 changed files with 11 additions and 8 deletions
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19
src/mesa/state_tracker/st_atom_blend.c
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@ -191,7 +191,7 @@ update_blend( struct st_context *st )
{
struct pipe_blend_state *blend = &st->state.blend;
unsigned num_state = 1;
unsigned i;
unsigned i, j;
memset(blend, 0, sizeof(*blend));
@ -214,12 +214,15 @@ update_blend( struct st_context *st )
}
else if (st->ctx->Color.BlendEnabled) {
/* blending enabled */
for (i = 0; i < num_state; i++) {
for (i = 0, j = 0; i < num_state; i++) {
blend->rt[i].blend_enable = (st->ctx->Color.BlendEnabled >> i) & 0x1;
if (st->ctx->Extensions.ARB_draw_buffers_blend)
j = i;
blend->rt[i].rgb_func =
translate_blend(st->ctx->Color.Blend[i].EquationRGB);
translate_blend(st->ctx->Color.Blend[j].EquationRGB);
if (st->ctx->Color.Blend[i].EquationRGB == GL_MIN ||
st->ctx->Color.Blend[i].EquationRGB == GL_MAX) {
@ -229,13 +232,13 @@ update_blend( struct st_context *st )
}
else {
blend->rt[i].rgb_src_factor =
translate_blend(st->ctx->Color.Blend[i].SrcRGB);
translate_blend(st->ctx->Color.Blend[j].SrcRGB);
blend->rt[i].rgb_dst_factor =
translate_blend(st->ctx->Color.Blend[i].DstRGB);
translate_blend(st->ctx->Color.Blend[j].DstRGB);
}
blend->rt[i].alpha_func =
translate_blend(st->ctx->Color.Blend[i].EquationA);
translate_blend(st->ctx->Color.Blend[j].EquationA);
if (st->ctx->Color.Blend[i].EquationA == GL_MIN ||
st->ctx->Color.Blend[i].EquationA == GL_MAX) {
@ -245,9 +248,9 @@ update_blend( struct st_context *st )
}
else {
blend->rt[i].alpha_src_factor =
translate_blend(st->ctx->Color.Blend[i].SrcA);
translate_blend(st->ctx->Color.Blend[j].SrcA);
blend->rt[i].alpha_dst_factor =
translate_blend(st->ctx->Color.Blend[i].DstA);
translate_blend(st->ctx->Color.Blend[j].DstA);
}
}
}