/*
* 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 "nv_object.xml.h"
#include "nv04_3d.xml.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 {
struct gl_context *ctx;
int unit;
GLboolean alpha;
GLboolean premodulate;
/* 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, ctx, rc, i) do { \
struct gl_tex_env_combine_state *c = \
ctx->Texture.Unit[i]._CurrentCombine; \
(rc)->ctx = ctx; \
(rc)->unit = i; \
(rc)->alpha = __INIT_COMBINER_ALPHA_##chan; \
(rc)->premodulate = c->_NumArgs##chan == 4; \
(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
* source. */
static uint32_t
get_input_source(struct combiner_state *rc, int source)
{
switch (source) {
case GL_ZERO:
return COMBINER_SOURCE(ZERO);
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:
}
}
/* Get the (possibly inverted) combiner input mapping for the
* specified EXT_texture_env_combine operand. */
#define INVERT 0x1
static uint32_t
get_input_mapping(struct combiner_state *rc, int operand, int flags)
{
int map = 0;
if (!is_color_operand(operand) && !rc->alpha)
map |= COMBINER_ALPHA;
if (is_negative_operand(operand) == !(flags & INVERT))
map |= COMBINER_INVERT;
return map;
}
static uint32_t
get_input_arg(struct combiner_state *rc, int arg, int flags)
{
int source = rc->source[arg];
int operand = rc->operand[arg];
/* Fake several unsupported texture formats. */
if (is_texture_source(source)) {
int i = (source == GL_TEXTURE ?
rc->unit : source - GL_TEXTURE0);
struct gl_texture_object *t = rc->ctx->Texture.Unit[i]._Current;
gl_format format = t->Image[0][t->BaseLevel]->TexFormat;
if (format == MESA_FORMAT_A8) {
/* Emulated using I8. */
if (is_color_operand(operand))
return COMBINER_SOURCE(ZERO) |
get_input_mapping(rc, operand, flags);
} else if (format == MESA_FORMAT_L8) {
/* Emulated using I8. */
if (!is_color_operand(operand))
return COMBINER_SOURCE(ZERO) |
get_input_mapping(rc, operand,
flags ^ INVERT);
}
}
return get_input_source(rc, source) |
get_input_mapping(rc, operand, flags);
}
/* 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_input_arg(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:
case GL_ADD_SIGNED:
if (rc->premodulate) {
INPUT_ARG(rc, 0, 0, 0);
INPUT_ARG(rc, 1, 1, 0);
INPUT_ARG(rc, 2, 2, 0);
INPUT_ARG(rc, 3, 3, 0);
} else {
INPUT_ARG(rc, 0, 0, 0);
INPUT_SRC(rc, 1, ZERO, INVERT);
INPUT_ARG(rc, 2, 1, 0);
INPUT_SRC(rc, 3, ZERO, INVERT);
}
if (rc->mode == GL_ADD_SIGNED)
SIGNED_OP(rc);
else
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;
default:
}
}
static unsigned
get_texenv_mode(unsigned mode)
{
switch (mode) {
case GL_REPLACE:
return 0x1;
case GL_DECAL:
return 0x3;
case GL_MODULATE:
return 0x4;
default:
}
}
void
nv04_emit_tex_env(struct gl_context *ctx, int emit)
{
struct nv04_context *nv04 = to_nv04_context(ctx);
const int i = emit - NOUVEAU_STATE_TEX_ENV0;
struct combiner_state rc_a = {}, rc_c = {};
/* Compute the new combiner state. */
if (ctx->Texture.Unit[i]._ReallyEnabled) {
INIT_COMBINER(A, ctx, &rc_a, i);
setup_combiner(&rc_a);
INIT_COMBINER(RGB, ctx, &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);
}
/* calculate non-multitex state */
nv04->blend &= ~NV04_TEXTURED_TRIANGLE_BLEND_TEXTURE_MAP__MASK;
if (ctx->Texture._EnabledUnits)
nv04->blend |= get_texenv_mode(ctx->Texture.Unit[0].EnvMode);
else
nv04->blend |= get_texenv_mode(GL_MODULATE);
/* update calculated multitex state */
nv04->alpha[i] = rc_a.hw;
nv04->color[i] = rc_c.hw;
nv04->factor = pack_rgba_f(MESA_FORMAT_ARGB8888,
ctx->Texture.Unit[0].EnvColor);
}