This should reduce shader recompilations with drivers that emulate fragment
color clamping, because we want the clamping to be enabled only if there is
a signed normalized or floating-point colorbuffer.
---
src/mesa/main/blend.c | 2 +-
src/mesa/main/fbobject.c | 7 ++++++-
src/mesa/main/framebuffer.c | 1 +
src/mesa/main/get.c | 9 +++++----
src/mesa/main/mtypes.h | 1 +
src/mesa/main/state.c | 12 +++++++++++-
src/mesa/main/texenv.c | 3 ++-
src/mesa/main/texparam.c | 3 ++-
src/mesa/program/prog_statevars.c | 5 +++--
src/mesa/state_tracker/st_atom_rasterizer.c | 3 +--
src/mesa/state_tracker/st_atom_shader.c | 3 +--
src/mesa/state_tracker/st_cb_bitmap.c | 3 +--
src/mesa/state_tracker/st_cb_drawpixels.c | 6 ++----
13 files changed, 37 insertions(+), 21 deletions(-)
diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c
index 876cbf2..c1b49b1 100644
--- a/src/mesa/main/blend.c
+++ b/src/mesa/main/blend.c
@@ -860,7 +860,7 @@ void _mesa_init_color( struct gl_context * ctx )
}
ctx->Color.ClampFragmentColor = GL_FIXED_ONLY_ARB;
- ctx->Color._ClampFragmentColor = GL_TRUE;
+ ctx->Color._ClampFragmentColor = GL_FALSE;
ctx->Color.ClampReadColor = GL_FIXED_ONLY_ARB;
if (ctx->API == API_OPENGLES2) {
diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 67c1161..fc2b262 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -785,6 +785,7 @@ _mesa_test_framebuffer_completeness(struct gl_context *ctx,
fb->Width = 0;
fb->Height = 0;
fb->_AllColorBuffersFixedPoint = GL_TRUE;
+ fb->_HasSNormOrFloatColorBuffer = GL_FALSE;
/* Start at -2 to more easily loop over all attachment points.
* -2: depth buffer
@@ -901,13 +902,17 @@ _mesa_test_framebuffer_completeness(struct gl_context
*ctx,
/* check if integer color */
fb->_IntegerColor = _mesa_is_format_integer_color(attFormat);
- /* Update _AllColorBuffersFixedPoint. */
+ /* Update _AllColorBuffersFixedPoint and _HasSNormOrFloatColorBuffer. */
if (i >= 0) {
GLenum type = _mesa_get_format_datatype(attFormat);
fb->_AllColorBuffersFixedPoint =
fb->_AllColorBuffersFixedPoint &&
(type == GL_UNSIGNED_NORMALIZED || type == GL_SIGNED_NORMALIZED);
+
+ fb->_HasSNormOrFloatColorBuffer =
+ fb->_HasSNormOrFloatColorBuffer ||
+ type == GL_SIGNED_NORMALIZED || type == GL_FLOAT;
}
/* Error-check width, height, format */
diff --git a/src/mesa/main/framebuffer.c b/src/mesa/main/framebuffer.c
index 5fb3677..757c4b0 100644
--- a/src/mesa/main/framebuffer.c
+++ b/src/mesa/main/framebuffer.c
@@ -155,6 +155,7 @@ _mesa_initialize_window_framebuffer(struct gl_framebuffer
*fb,
fb->Delete = _mesa_destroy_framebuffer;
fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
fb->_AllColorBuffersFixedPoint = !visual->floatMode;
+ fb->_HasSNormOrFloatColorBuffer = visual->floatMode;
compute_depth_max(fb);
}
diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index 582ef31..244e3ea 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -24,6 +24,7 @@
#include "glheader.h"
#include "context.h"
+#include "blend.h"
#include "enable.h"
#include "enums.h"
#include "extensions.h"
@@ -767,13 +768,13 @@ find_custom_value(struct gl_context *ctx, const struct
value_desc *d, union valu
break;
case GL_FOG_COLOR:
- if(ctx->Color._ClampFragmentColor)
+ if (_mesa_get_clamp_fragment_color(ctx))
COPY_4FV(v->value_float_4, ctx->Fog.Color);
else
COPY_4FV(v->value_float_4, ctx->Fog.ColorUnclamped);
break;
case GL_COLOR_CLEAR_VALUE:
- if(ctx->Color._ClampFragmentColor) {
+ if (_mesa_get_clamp_fragment_color(ctx)) {
v->value_float_4[0] = CLAMP(ctx->Color.ClearColor.f[0], 0.0F, 1.0F);
v->value_float_4[1] = CLAMP(ctx->Color.ClearColor.f[1], 0.0F, 1.0F);
v->value_float_4[2] = CLAMP(ctx->Color.ClearColor.f[2], 0.0F, 1.0F);
@@ -782,13 +783,13 @@ find_custom_value(struct gl_context *ctx, const struct
value_desc *d, union valu
COPY_4FV(v->value_float_4, ctx->Color.ClearColor.f);
break;
case GL_BLEND_COLOR_EXT:
- if(ctx->Color._ClampFragmentColor)
+ if (_mesa_get_clamp_fragment_color(ctx))
COPY_4FV(v->value_float_4, ctx->Color.BlendColor);
else
COPY_4FV(v->value_float_4, ctx->Color.BlendColorUnclamped);
break;
case GL_ALPHA_TEST_REF:
- if(ctx->Color._ClampFragmentColor)
+ if (_mesa_get_clamp_fragment_color(ctx))
v->value_float = ctx->Color.AlphaRef;
else
v->value_float = ctx->Color.AlphaRefUnclamped;
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 8c64a5b..575db90 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2671,6 +2671,7 @@ struct gl_framebuffer
/* ARB_color_buffer_float */
GLboolean _AllColorBuffersFixedPoint; /* no integer, no float */
+ GLboolean _HasSNormOrFloatColorBuffer;
/** Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
diff --git a/src/mesa/main/state.c b/src/mesa/main/state.c
index c94a244..73c5a1c 100644
--- a/src/mesa/main/state.c
+++ b/src/mesa/main/state.c
@@ -314,7 +314,17 @@ update_multisample(struct gl_context *ctx)
static void
update_clamp_fragment_color(struct gl_context *ctx)
{
- ctx->Color._ClampFragmentColor = _mesa_get_clamp_fragment_color(ctx);
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+
+ /* Don't clamp if:
+ * - there is no colorbuffer
+ * - all colorbuffers are unsigned normalized, so clamping has no effect
+ * - there is an integer colorbuffer
+ */
+ if (!fb || !fb->_HasSNormOrFloatColorBuffer || fb->_IntegerColor)
+ ctx->Color._ClampFragmentColor = GL_FALSE;
+ else
+ ctx->Color._ClampFragmentColor = _mesa_get_clamp_fragment_color(ctx);
}
diff --git a/src/mesa/main/texenv.c b/src/mesa/main/texenv.c
index 0fe5fbd..2979e67 100644
--- a/src/mesa/main/texenv.c
+++ b/src/mesa/main/texenv.c
@@ -32,6 +32,7 @@
#include "main/glheader.h"
#include "main/context.h"
+#include "main/blend.h"
#include "main/enums.h"
#include "main/macros.h"
#include "main/mtypes.h"
@@ -680,7 +681,7 @@ _mesa_GetTexEnvfv( GLenum target, GLenum pname, GLfloat
*params )
if (pname == GL_TEXTURE_ENV_COLOR) {
if(ctx->NewState & (_NEW_BUFFERS | _NEW_FRAG_CLAMP))
_mesa_update_state(ctx);
- if(ctx->Color._ClampFragmentColor)
+ if (_mesa_get_clamp_fragment_color(ctx))
COPY_4FV( params, texUnit->EnvColor );
else
COPY_4FV( params, texUnit->EnvColorUnclamped );
diff --git a/src/mesa/main/texparam.c b/src/mesa/main/texparam.c
index bd2f751..224aaee 100644
--- a/src/mesa/main/texparam.c
+++ b/src/mesa/main/texparam.c
@@ -31,6 +31,7 @@
#include <stdbool.h>
#include "main/glheader.h"
+#include "main/blend.h"
#include "main/colormac.h"
#include "main/context.h"
#include "main/enums.h"
@@ -1329,7 +1330,7 @@ _mesa_GetTexParameterfv( GLenum target, GLenum pname,
GLfloat *params )
if (ctx->NewState & (_NEW_BUFFERS | _NEW_FRAG_CLAMP))
_mesa_update_state_locked(ctx);
- if (ctx->Color._ClampFragmentColor) {
+ if (_mesa_get_clamp_fragment_color(ctx)) {
params[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
params[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
params[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
diff --git a/src/mesa/program/prog_statevars.c
b/src/mesa/program/prog_statevars.c
index ccc590d..09d2a56 100644
--- a/src/mesa/program/prog_statevars.c
+++ b/src/mesa/program/prog_statevars.c
@@ -31,6 +31,7 @@
#include "main/glheader.h"
#include "main/context.h"
+#include "main/blend.h"
#include "main/imports.h"
#include "main/macros.h"
#include "main/mtypes.h"
@@ -239,14 +240,14 @@ _mesa_fetch_state(struct gl_context *ctx, const
gl_state_index state[],
{
/* state[1] is the texture unit */
const GLuint unit = (GLuint) state[1];
- if(ctx->Color._ClampFragmentColor)
+ if (_mesa_get_clamp_fragment_color(ctx))
COPY_4V(value, ctx->Texture.Unit[unit].EnvColor);
else
COPY_4V(value, ctx->Texture.Unit[unit].EnvColorUnclamped);
}
return;
case STATE_FOG_COLOR:
- if(ctx->Color._ClampFragmentColor)
+ if (_mesa_get_clamp_fragment_color(ctx))
COPY_4V(value, ctx->Fog.Color);
else
COPY_4V(value, ctx->Fog.ColorUnclamped);
diff --git a/src/mesa/state_tracker/st_atom_rasterizer.c
b/src/mesa/state_tracker/st_atom_rasterizer.c
index 866e562..62464b4 100644
--- a/src/mesa/state_tracker/st_atom_rasterizer.c
+++ b/src/mesa/state_tracker/st_atom_rasterizer.c
@@ -227,8 +227,7 @@ static void update_raster_state( struct st_context *st )
/* _NEW_FRAG_CLAMP */
raster->clamp_fragment_color = !st->clamp_frag_color_in_shader &&
- ctx->Color._ClampFragmentColor &&
- !ctx->DrawBuffer->_IntegerColor;
+ ctx->Color._ClampFragmentColor;
raster->gl_rasterization_rules = 1;
/* _NEW_RASTERIZER_DISCARD */
diff --git a/src/mesa/state_tracker/st_atom_shader.c
b/src/mesa/state_tracker/st_atom_shader.c
index c1d7c80..c0239e9 100644
--- a/src/mesa/state_tracker/st_atom_shader.c
+++ b/src/mesa/state_tracker/st_atom_shader.c
@@ -86,8 +86,7 @@ update_fp( struct st_context *st )
/* _NEW_FRAG_CLAMP */
key.clamp_color = st->clamp_frag_color_in_shader &&
- st->ctx->Color._ClampFragmentColor &&
- !st->ctx->DrawBuffer->_IntegerColor;
+ st->ctx->Color._ClampFragmentColor;
st->fp_variant = st_get_fp_variant(st, stfp, &key);
diff --git a/src/mesa/state_tracker/st_cb_bitmap.c
b/src/mesa/state_tracker/st_cb_bitmap.c
index bae9ff8..a838412 100644
--- a/src/mesa/state_tracker/st_cb_bitmap.c
+++ b/src/mesa/state_tracker/st_cb_bitmap.c
@@ -417,8 +417,7 @@ draw_bitmap_quad(struct gl_context *ctx, GLint x, GLint y,
GLfloat z,
key.st = st;
key.bitmap = GL_TRUE;
key.clamp_color = st->clamp_frag_color_in_shader &&
- st->ctx->Color._ClampFragmentColor &&
- !st->ctx->DrawBuffer->_IntegerColor;
+ st->ctx->Color._ClampFragmentColor;
fpv = st_get_fp_variant(st, st->fp, &key);
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c
b/src/mesa/state_tracker/st_cb_drawpixels.c
index f0baa34..d5b6b50 100644
--- a/src/mesa/state_tracker/st_cb_drawpixels.c
+++ b/src/mesa/state_tracker/st_cb_drawpixels.c
@@ -707,8 +707,7 @@ draw_textured_quad(struct gl_context *ctx, GLint x, GLint
y, GLfloat z,
struct pipe_rasterizer_state rasterizer;
memset(&rasterizer, 0, sizeof(rasterizer));
rasterizer.clamp_fragment_color = !st->clamp_frag_color_in_shader &&
- ctx->Color._ClampFragmentColor &&
- !ctx->DrawBuffer->_IntegerColor;
+ ctx->Color._ClampFragmentColor;
rasterizer.gl_rasterization_rules = 1;
rasterizer.depth_clip = !ctx->Transform.DepthClamp;
rasterizer.scissor = ctx->Scissor.Enabled;
@@ -1034,8 +1033,7 @@ get_color_fp_variant(struct st_context *st)
ctx->Pixel.AlphaScale != 1.0);
key.pixelMaps = ctx->Pixel.MapColorFlag;
key.clamp_color = st->clamp_frag_color_in_shader &&
- st->ctx->Color._ClampFragmentColor &&
- !st->ctx->DrawBuffer->_IntegerColor;
+ st->ctx->Color._ClampFragmentColor;
fpv = st_get_fp_variant(st, st->fp, &key);
--
1.7.10.4
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