mesa/main: Maintain compressed TexEnv Combine state.

Signed-off-by: Gustaw Smolarczyk <wielkiegie@gmail.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>

2 files changed, 186 insertions, 0 deletions

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 4986e42d1b3..e5f7cbaa5bc 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -1078,6 +1078,87 @@ struct gl_tex_env_combine_state
 };
 
 
+/** Compressed TexEnv effective Combine mode */
+enum gl_tex_env_mode
+{
+   TEXENV_MODE_REPLACE,                 /* r = a0 */
+   TEXENV_MODE_MODULATE,                /* r = a0 * a1 */
+   TEXENV_MODE_ADD,                     /* r = a0 + a1 */
+   TEXENV_MODE_ADD_SIGNED,              /* r = a0 + a1 - 0.5 */
+   TEXENV_MODE_INTERPOLATE,             /* r = a0 * a2 + a1 * (1 - a2) */
+   TEXENV_MODE_SUBTRACT,                /* r = a0 - a1 */
+   TEXENV_MODE_DOT3_RGB,                /* r = a0 . a1 */
+   TEXENV_MODE_DOT3_RGB_EXT,            /* r = a0 . a1 */
+   TEXENV_MODE_DOT3_RGBA,               /* r = a0 . a1 */
+   TEXENV_MODE_DOT3_RGBA_EXT,           /* r = a0 . a1 */
+   TEXENV_MODE_MODULATE_ADD_ATI,        /* r = a0 * a2 + a1 */
+   TEXENV_MODE_MODULATE_SIGNED_ADD_ATI, /* r = a0 * a2 + a1 - 0.5 */
+   TEXENV_MODE_MODULATE_SUBTRACT_ATI,   /* r = a0 * a2 - a1 */
+   TEXENV_MODE_ADD_PRODUCTS_NV,         /* r = a0 * a1 + a2 * a3 */
+   TEXENV_MODE_ADD_PRODUCTS_SIGNED_NV,  /* r = a0 * a1 + a2 * a3 - 0.5 */
+};
+
+
+/** Compressed TexEnv Combine source */
+enum gl_tex_env_source
+{
+   TEXENV_SRC_TEXTURE0,
+   TEXENV_SRC_TEXTURE1,
+   TEXENV_SRC_TEXTURE2,
+   TEXENV_SRC_TEXTURE3,
+   TEXENV_SRC_TEXTURE4,
+   TEXENV_SRC_TEXTURE5,
+   TEXENV_SRC_TEXTURE6,
+   TEXENV_SRC_TEXTURE7,
+   TEXENV_SRC_TEXTURE,
+   TEXENV_SRC_PREVIOUS,
+   TEXENV_SRC_PRIMARY_COLOR,
+   TEXENV_SRC_CONSTANT,
+   TEXENV_SRC_ZERO,
+   TEXENV_SRC_ONE,
+};
+
+
+/** Compressed TexEnv Combine operand */
+enum gl_tex_env_operand
+{
+   TEXENV_OPR_COLOR,
+   TEXENV_OPR_ONE_MINUS_COLOR,
+   TEXENV_OPR_ALPHA,
+   TEXENV_OPR_ONE_MINUS_ALPHA,
+};
+
+
+/** Compressed TexEnv Combine argument */
+struct gl_tex_env_argument
+{
+#ifdef __GNUC__
+   __extension__ uint8_t Source:4;  /**< TEXENV_SRC_x */
+   __extension__ uint8_t Operand:2; /**< TEXENV_OPR_x */
+#else
+   uint8_t Source;  /**< SRC_x */
+   uint8_t Operand; /**< OPR_x */
+#endif
+};
+
+
+/***
+ * Compressed TexEnv Combine state.
+ */
+struct gl_tex_env_combine_packed
+{
+   uint32_t ModeRGB:4;          /**< Effective mode for RGB as 4 bits */
+   uint32_t ModeA:4;            /**< Effective mode for RGB as 4 bits */
+   uint32_t ScaleShiftRGB:2;    /**< 0, 1 or 2 */
+   uint32_t ScaleShiftA:2;      /**< 0, 1 or 2 */
+   uint32_t NumArgsRGB:3;       /**< Number of inputs used for the RGB combiner */
+   uint32_t NumArgsA:3;         /**< Number of inputs used for the A combiner */
+   /** Source arguments in a packed manner */
+   struct gl_tex_env_argument ArgsRGB[MAX_COMBINER_TERMS];
+   struct gl_tex_env_argument ArgsA[MAX_COMBINER_TERMS];
+};
+
+
 /**
  * TexGenEnabled flags.
  */
@@ -1180,6 +1261,8 @@ struct gl_texture_unit
    /** Points to highest priority, complete and enabled texture object */
    struct gl_texture_object *_Current;
 
+   /** Current compressed TexEnv & Combine state */
+   struct gl_tex_env_combine_packed _CurrentCombinePacked;
 };
 
 
diff --git a/src/mesa/main/texstate.c b/src/mesa/main/texstate.c
index aa99b0667cb..830b230b5d7 100644
--- a/src/mesa/main/texstate.c
+++ b/src/mesa/main/texstate.c
@@ -376,6 +376,107 @@ _mesa_update_texture_matrices(struct gl_context *ctx)
 
 
 /**
+ * Translate GL combiner state into a MODE_x value
+ */
+static uint32_t
+tex_combine_translate_mode(GLenum envMode, GLenum mode)
+{
+   switch (mode) {
+   case GL_REPLACE: return TEXENV_MODE_REPLACE;
+   case GL_MODULATE: return TEXENV_MODE_MODULATE;
+   case GL_ADD:
+      if (envMode == GL_COMBINE4_NV)
+	 return TEXENV_MODE_ADD_PRODUCTS_NV;
+      else
+	 return TEXENV_MODE_ADD;
+   case GL_ADD_SIGNED:
+      if (envMode == GL_COMBINE4_NV)
+	 return TEXENV_MODE_ADD_PRODUCTS_SIGNED_NV;
+      else
+	 return TEXENV_MODE_ADD_SIGNED;
+   case GL_INTERPOLATE: return TEXENV_MODE_INTERPOLATE;
+   case GL_SUBTRACT: return TEXENV_MODE_SUBTRACT;
+   case GL_DOT3_RGB: return TEXENV_MODE_DOT3_RGB;
+   case GL_DOT3_RGB_EXT: return TEXENV_MODE_DOT3_RGB_EXT;
+   case GL_DOT3_RGBA: return TEXENV_MODE_DOT3_RGBA;
+   case GL_DOT3_RGBA_EXT: return TEXENV_MODE_DOT3_RGBA_EXT;
+   case GL_MODULATE_ADD_ATI: return TEXENV_MODE_MODULATE_ADD_ATI;
+   case GL_MODULATE_SIGNED_ADD_ATI: return TEXENV_MODE_MODULATE_SIGNED_ADD_ATI;
+   case GL_MODULATE_SUBTRACT_ATI: return TEXENV_MODE_MODULATE_SUBTRACT_ATI;
+   default:
+      unreachable("Invalid TexEnv Combine mode");
+   }
+}
+
+
+static uint8_t
+tex_combine_translate_source(GLenum src)
+{
+   switch (src) {
+   case GL_TEXTURE0:
+   case GL_TEXTURE1:
+   case GL_TEXTURE2:
+   case GL_TEXTURE3:
+   case GL_TEXTURE4:
+   case GL_TEXTURE5:
+   case GL_TEXTURE6:
+   case GL_TEXTURE7: return TEXENV_SRC_TEXTURE0 + (src - GL_TEXTURE0);
+   case GL_TEXTURE: return TEXENV_SRC_TEXTURE;
+   case GL_PREVIOUS: return TEXENV_SRC_PREVIOUS;
+   case GL_PRIMARY_COLOR: return TEXENV_SRC_PRIMARY_COLOR;
+   case GL_CONSTANT: return TEXENV_SRC_CONSTANT;
+   case GL_ZERO: return TEXENV_SRC_ZERO;
+   case GL_ONE: return TEXENV_SRC_ONE;
+   default:
+      unreachable("Invalid TexEnv Combine argument source");
+   }
+}
+
+
+static uint8_t
+tex_combine_translate_operand(GLenum operand)
+{
+   switch (operand) {
+   case GL_SRC_COLOR: return TEXENV_OPR_COLOR;
+   case GL_ONE_MINUS_SRC_COLOR: return TEXENV_OPR_ONE_MINUS_COLOR;
+   case GL_SRC_ALPHA: return TEXENV_OPR_ALPHA;
+   case GL_ONE_MINUS_SRC_ALPHA: return TEXENV_OPR_ONE_MINUS_ALPHA;
+   default:
+      unreachable("Invalid TexEnv Combine argument source");
+   }
+}
+
+
+static void
+pack_tex_combine(struct gl_texture_unit *texUnit)
+{
+   struct gl_tex_env_combine_state *state = texUnit->_CurrentCombine;
+   struct gl_tex_env_combine_packed *packed = &texUnit->_CurrentCombinePacked;
+
+   memset(packed, 0, sizeof *packed);
+
+   packed->ModeRGB = tex_combine_translate_mode(texUnit->EnvMode, state->ModeRGB);
+   packed->ModeA = tex_combine_translate_mode(texUnit->EnvMode, state->ModeA);
+   packed->ScaleShiftRGB = state->ScaleShiftRGB;
+   packed->ScaleShiftA = state->ScaleShiftA;
+   packed->NumArgsRGB = state->_NumArgsRGB;
+   packed->NumArgsA = state->_NumArgsA;
+
+   for (int i = 0; i < state->_NumArgsRGB; ++i)
+   {
+      packed->ArgsRGB[i].Source = tex_combine_translate_source(state->SourceRGB[i]);
+      packed->ArgsRGB[i].Operand = tex_combine_translate_operand(state->OperandRGB[i]);
+   }
+
+   for (int i = 0; i < state->_NumArgsA; ++i)
+   {
+      packed->ArgsA[i].Source = tex_combine_translate_source(state->SourceA[i]);
+      packed->ArgsA[i].Operand = tex_combine_translate_operand(state->OperandA[i]);
+   }
+}
+
+
+/**
  * Examine texture unit's combine/env state to update derived state.
  */
 static void
@@ -467,6 +568,8 @@ update_tex_combine(struct gl_context *ctx, struct gl_texture_unit *texUnit)
       _mesa_problem(ctx, "invalid Alpha combine mode in update_texture_state");
       break;
    }
+
+   pack_tex_combine(texUnit);
 }
 
 static void