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authorBrian Paul <brianp@vmware.com>2009-12-29 15:04:03 -0700
committerBrian Paul <brianp@vmware.com>2009-12-29 15:04:03 -0700
commit3728673bd1b974e54858fbab6ff62d3607b0d3f0 (patch)
tree3c66688732a9aa9133f72e79bb43ec1cda1cb66c /src/mesa/drivers
parent561a107df71aace22a15003cc77dd504ab8b06a0 (diff)
mesa: per-buffer blend enabled flags
ctx->Color.BlendEnabled is now a GLbitfield instead of a GLboolean to indicate blend on/off status for each color/draw buffer. This is infrastructure for GL_EXT_draw_buffers2 and OpenGL 3.x New functions include _mesa_EnableIndexed(), _mesa_DisableIndexed(), and _mesa_IsEnabledIndexed(). The enable function corresponds to glEnableIndexedEXT() for GL_EXT_draw_buffers2 or glEnablei() for GL3. Note that there's quite a few tests for ctx->Color.BlendEnabled != 0 in drivers, etc. Those tests can remain as-is since the mask will be 0 or ~0 unless GL_EXT_draw_buffers2 is enabled.
Diffstat (limited to 'src/mesa/drivers')
-rw-r--r--src/mesa/drivers/common/meta.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index cd9075b393..da2c06677a 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -107,7 +107,7 @@ struct save_state
GLboolean AlphaEnabled;
/** META_BLEND */
- GLboolean BlendEnabled;
+ GLbitfield BlendEnabled;
GLboolean ColorLogicOpEnabled;
/** META_COLOR_MASK */
@@ -335,8 +335,12 @@ _mesa_meta_begin(GLcontext *ctx, GLbitfield state)
if (state & META_BLEND) {
save->BlendEnabled = ctx->Color.BlendEnabled;
- if (ctx->Color.BlendEnabled)
- _mesa_set_enable(ctx, GL_BLEND, GL_FALSE);
+ if (ctx->Color.BlendEnabled) {
+ GLuint i;
+ for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+ _mesa_set_enablei(ctx, GL_BLEND, i, GL_FALSE);
+ }
+ }
save->ColorLogicOpEnabled = ctx->Color.ColorLogicOpEnabled;
if (ctx->Color.ColorLogicOpEnabled)
_mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, GL_FALSE);
@@ -566,8 +570,12 @@ _mesa_meta_end(GLcontext *ctx)
}
if (state & META_BLEND) {
- if (ctx->Color.BlendEnabled != save->BlendEnabled)
- _mesa_set_enable(ctx, GL_BLEND, save->BlendEnabled);
+ if (ctx->Color.BlendEnabled != save->BlendEnabled) {
+ GLuint i;
+ for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+ _mesa_set_enablei(ctx, GL_BLEND, i, (save->BlendEnabled >> i) & 1);
+ }
+ }
if (ctx->Color.ColorLogicOpEnabled != save->ColorLogicOpEnabled)
_mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, save->ColorLogicOpEnabled);
}