1 files changed, 261 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/nouveau/nv04_state_frag.c b/src/mesa/drivers/dri/nouveau/nv04_state_frag.c
new file mode 100644
index 00000000000..34ee2962023
--- /dev/null
+++ b/src/mesa/drivers/dri/nouveau/nv04_state_frag.c
@@ -0,0 +1,261 @@
+/*
+ * 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));
+}