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/*
* Copyright (C) 2009 Francisco Jerez.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include "nouveau_driver.h"
#include "nouveau_context.h"
#include "nouveau_util.h"
#include "nouveau_class.h"
#include "nv04_driver.h"
#define COMBINER_SHIFT(in) \
(NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_ARGUMENT##in##_SHIFT \
- NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_ARGUMENT0_SHIFT)
#define COMBINER_SOURCE(reg) \
NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_ARGUMENT0_##reg
#define COMBINER_INVERT \
NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_INVERSE0
#define COMBINER_ALPHA \
NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_ALPHA0
struct combiner_state {
int unit;
GLboolean alpha;
/* GL state */
GLenum mode;
GLenum *source;
GLenum *operand;
GLuint logscale;
/* Derived HW state */
uint32_t hw;
};
#define __INIT_COMBINER_ALPHA_A GL_TRUE
#define __INIT_COMBINER_ALPHA_RGB GL_FALSE
/* Initialize a combiner_state struct from the texture unit
* context. */
#define INIT_COMBINER(chan, rc, i) do { \
struct gl_tex_env_combine_state *c = \
ctx->Texture.Unit[i]._CurrentCombine; \
(rc)->alpha = __INIT_COMBINER_ALPHA_##chan; \
(rc)->unit = i; \
(rc)->mode = c->Mode##chan; \
(rc)->source = c->Source##chan; \
(rc)->operand = c->Operand##chan; \
(rc)->logscale = c->ScaleShift##chan; \
(rc)->hw = 0; \
} while (0)
/* Get the combiner source for the specified EXT_texture_env_combine
* argument. */
static uint32_t
get_arg_source(struct combiner_state *rc, int arg)
{
switch (rc->source[arg]) {
case GL_TEXTURE:
return rc->unit ? COMBINER_SOURCE(TEXTURE1) :
COMBINER_SOURCE(TEXTURE0);
case GL_TEXTURE0:
return COMBINER_SOURCE(TEXTURE0);
case GL_TEXTURE1:
return COMBINER_SOURCE(TEXTURE1);
case GL_CONSTANT:
return COMBINER_SOURCE(CONSTANT);
case GL_PRIMARY_COLOR:
return COMBINER_SOURCE(PRIMARY_COLOR);
case GL_PREVIOUS:
return rc->unit ? COMBINER_SOURCE(PREVIOUS) :
COMBINER_SOURCE(PRIMARY_COLOR);
default:
assert(0);
}
}
/* Get the (possibly inverted) combiner input mapping for the
* specified argument. */
#define INVERT 0x1
static uint32_t
get_arg_mapping(struct combiner_state *rc, int arg, int flags)
{
int map = 0;
switch (rc->operand[arg]) {
case GL_SRC_COLOR:
case GL_ONE_MINUS_SRC_COLOR:
break;
case GL_SRC_ALPHA:
case GL_ONE_MINUS_SRC_ALPHA:
map |= rc->alpha ? 0 : COMBINER_ALPHA;
break;
}
switch (rc->operand[arg]) {
case GL_SRC_COLOR:
case GL_SRC_ALPHA:
map |= flags & INVERT ? COMBINER_INVERT : 0;
break;
case GL_ONE_MINUS_SRC_COLOR:
case GL_ONE_MINUS_SRC_ALPHA:
map |= flags & INVERT ? 0 : COMBINER_INVERT;
break;
}
return map;
}
/* Bind the combiner input <in> to the combiner source <src>,
* possibly inverted. */
#define INPUT_SRC(rc, in, src, flags) \
(rc)->hw |= ((flags & INVERT ? COMBINER_INVERT : 0) | \
COMBINER_SOURCE(src)) << COMBINER_SHIFT(in)
/* Bind the combiner input <in> to the EXT_texture_env_combine
* argument <arg>, possibly inverted. */
#define INPUT_ARG(rc, in, arg, flags) \
(rc)->hw |= (get_arg_source(rc, arg) | \
get_arg_mapping(rc, arg, flags)) << COMBINER_SHIFT(in)
#define UNSIGNED_OP(rc) \
(rc)->hw |= ((rc)->logscale ? \
NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_MAP_SCALE2 : \
NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_MAP_IDENTITY)
#define SIGNED_OP(rc) \
(rc)->hw |= ((rc)->logscale ? \
NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_MAP_BIAS_SCALE2 : \
NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_MAP_BIAS)
static void
setup_combiner(struct combiner_state *rc)
{
switch (rc->mode) {
case GL_REPLACE:
INPUT_ARG(rc, 0, 0, 0);
INPUT_SRC(rc, 1, ZERO, INVERT);
INPUT_SRC(rc, 2, ZERO, 0);
INPUT_SRC(rc, 3, ZERO, 0);
UNSIGNED_OP(rc);
break;
case GL_MODULATE:
INPUT_ARG(rc, 0, 0, 0);
INPUT_ARG(rc, 1, 1, 0);
INPUT_SRC(rc, 2, ZERO, 0);
INPUT_SRC(rc, 3, ZERO, 0);
UNSIGNED_OP(rc);
break;
case GL_ADD:
INPUT_ARG(rc, 0, 0, 0);
INPUT_SRC(rc, 1, ZERO, INVERT);
INPUT_ARG(rc, 2, 1, 0);
INPUT_SRC(rc, 3, ZERO, INVERT);
UNSIGNED_OP(rc);
break;
case GL_INTERPOLATE:
INPUT_ARG(rc, 0, 0, 0);
INPUT_ARG(rc, 1, 2, 0);
INPUT_ARG(rc, 2, 1, 0);
INPUT_ARG(rc, 3, 2, INVERT);
UNSIGNED_OP(rc);
break;
case GL_ADD_SIGNED:
INPUT_ARG(rc, 0, 0, 0);
INPUT_SRC(rc, 1, ZERO, INVERT);
INPUT_ARG(rc, 2, 1, 0);
INPUT_SRC(rc, 3, ZERO, INVERT);
SIGNED_OP(rc);
break;
default:
assert(0);
}
}
void
nv04_emit_tex_env(GLcontext *ctx, int emit)
{
const int i = emit - NOUVEAU_STATE_TEX_ENV0;
struct nouveau_channel *chan = context_chan(ctx);
struct nouveau_grobj *fahrenheit = nv04_context_engine(ctx);
struct combiner_state rc_a = {}, rc_c = {};
if (!nv04_mtex_engine(fahrenheit)) {
context_dirty(ctx, BLEND);
return;
}
/* Compute the new combiner state. */
if (ctx->Texture.Unit[i]._ReallyEnabled) {
INIT_COMBINER(A, &rc_a, i);
setup_combiner(&rc_a);
INIT_COMBINER(RGB, &rc_c, i);
setup_combiner(&rc_c);
} else {
if (i == 0) {
INPUT_SRC(&rc_a, 0, PRIMARY_COLOR, 0);
INPUT_SRC(&rc_c, 0, PRIMARY_COLOR, 0);
} else {
INPUT_SRC(&rc_a, 0, PREVIOUS, 0);
INPUT_SRC(&rc_c, 0, PREVIOUS, 0);
}
INPUT_SRC(&rc_a, 1, ZERO, INVERT);
INPUT_SRC(&rc_c, 1, ZERO, INVERT);
INPUT_SRC(&rc_a, 2, ZERO, 0);
INPUT_SRC(&rc_c, 2, ZERO, 0);
INPUT_SRC(&rc_a, 3, ZERO, 0);
INPUT_SRC(&rc_c, 3, ZERO, 0);
UNSIGNED_OP(&rc_a);
UNSIGNED_OP(&rc_c);
}
/* Write the register combiner state out to the hardware. */
BEGIN_RING(chan, fahrenheit,
NV04_MULTITEX_TRIANGLE_COMBINE_ALPHA(i), 2);
OUT_RING(chan, rc_a.hw);
OUT_RING(chan, rc_c.hw);
BEGIN_RING(chan, fahrenheit,
NV04_MULTITEX_TRIANGLE_COMBINE_FACTOR, 1);
OUT_RING(chan, pack_rgba_f(MESA_FORMAT_ARGB8888,
ctx->Texture.Unit[0].EnvColor));
}
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