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authorFrancisco Jerez <currojerez@riseup.net>2010-02-23 16:57:06 +0100
committerFrancisco Jerez <currojerez@riseup.net>2010-02-25 18:37:37 +0100
commit3ccfce85e243e83afc1bb582d7424d9238a64f42 (patch)
tree15e348090b974f2f380146b606cb4d53cfc885b8
parent7269a30b86745a29bb575ce3545ab82e6514ce2a (diff)
dri/nouveau: Fake A8 and L8 texture support on nv04.
-rw-r--r--src/mesa/drivers/dri/nouveau/nv04_state_frag.c76
1 files changed, 46 insertions, 30 deletions
diff --git a/src/mesa/drivers/dri/nouveau/nv04_state_frag.c b/src/mesa/drivers/dri/nouveau/nv04_state_frag.c
index 34ee296202..d7c86d4178 100644
--- a/src/mesa/drivers/dri/nouveau/nv04_state_frag.c
+++ b/src/mesa/drivers/dri/nouveau/nv04_state_frag.c
@@ -41,6 +41,7 @@
NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_ALPHA0
struct combiner_state {
+ GLcontext *ctx;
int unit;
GLboolean alpha;
@@ -59,11 +60,12 @@ struct combiner_state {
/* Initialize a combiner_state struct from the texture unit
* context. */
-#define INIT_COMBINER(chan, rc, i) do { \
+#define INIT_COMBINER(chan, ctx, rc, i) do { \
struct gl_tex_env_combine_state *c = \
ctx->Texture.Unit[i]._CurrentCombine; \
- (rc)->alpha = __INIT_COMBINER_ALPHA_##chan; \
+ (rc)->ctx = ctx; \
(rc)->unit = i; \
+ (rc)->alpha = __INIT_COMBINER_ALPHA_##chan; \
(rc)->mode = c->Mode##chan; \
(rc)->source = c->Source##chan; \
(rc)->operand = c->Operand##chan; \
@@ -72,11 +74,11 @@ struct combiner_state {
} while (0)
/* Get the combiner source for the specified EXT_texture_env_combine
- * argument. */
+ * source. */
static uint32_t
-get_arg_source(struct combiner_state *rc, int arg)
+get_input_source(struct combiner_state *rc, int source)
{
- switch (rc->source[arg]) {
+ switch (source) {
case GL_TEXTURE:
return rc->unit ? COMBINER_SOURCE(TEXTURE1) :
COMBINER_SOURCE(TEXTURE0);
@@ -103,38 +105,53 @@ get_arg_source(struct combiner_state *rc, int arg)
}
/* Get the (possibly inverted) combiner input mapping for the
- * specified argument. */
+ * specified EXT_texture_env_combine operand. */
#define INVERT 0x1
static uint32_t
-get_arg_mapping(struct combiner_state *rc, int arg, int flags)
+get_input_mapping(struct combiner_state *rc, int operand, int flags)
{
int map = 0;
- switch (rc->operand[arg]) {
- case GL_SRC_COLOR:
- case GL_ONE_MINUS_SRC_COLOR:
- break;
+ if (!is_color_operand(operand) && !rc->alpha)
+ map |= COMBINER_ALPHA;
- case GL_SRC_ALPHA:
- case GL_ONE_MINUS_SRC_ALPHA:
- map |= rc->alpha ? 0 : COMBINER_ALPHA;
- break;
- }
+ if (is_negative_operand(operand) == !(flags & INVERT))
+ map |= COMBINER_INVERT;
- switch (rc->operand[arg]) {
- case GL_SRC_COLOR:
- case GL_SRC_ALPHA:
- map |= flags & INVERT ? COMBINER_INVERT : 0;
- break;
+ return map;
+}
- case GL_ONE_MINUS_SRC_COLOR:
- case GL_ONE_MINUS_SRC_ALPHA:
- map |= flags & INVERT ? 0 : COMBINER_INVERT;
- break;
+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 map;
+ return get_input_source(rc, source) |
+ get_input_mapping(rc, operand, flags);
}
/* Bind the combiner input <in> to the combiner source <src>,
@@ -146,8 +163,7 @@ get_arg_mapping(struct combiner_state *rc, int arg, int flags)
/* 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)
+ (rc)->hw |= get_input_arg(rc, arg, flags) << COMBINER_SHIFT(in)
#define UNSIGNED_OP(rc) \
(rc)->hw |= ((rc)->logscale ? \
@@ -222,10 +238,10 @@ nv04_emit_tex_env(GLcontext *ctx, int emit)
/* Compute the new combiner state. */
if (ctx->Texture.Unit[i]._ReallyEnabled) {
- INIT_COMBINER(A, &rc_a, i);
+ INIT_COMBINER(A, ctx, &rc_a, i);
setup_combiner(&rc_a);
- INIT_COMBINER(RGB, &rc_c, i);
+ INIT_COMBINER(RGB, ctx, &rc_c, i);
setup_combiner(&rc_c);
} else {